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Luotettava kumppani, vahvasti mukana

Asiakkaamme voivat luottaa siihen, että SSAB toimittaa ensiluokkaisia, vastuullisesti valmistettuja infrastruktuurituotteita, jotka ovat kustannustehokkaita. Meille kumppanuus asiakkaan kanssa tarkoittaa sitoutumista nopeisiin toimituksiin sekä asiantuntija-apua asiakkaalle aina tarvittaessa niin projektien suunnittelun kuin toteutuksenkin aikana.

SSAB:n kattavassa infrastruktuurituotteiden valikoimassa on teräspaaluja ja tukiseiniä perustuksiin ja satamarakenteisiin. Tarjoamme myös suojakaidejärjestelmiä, trapetsiprofiileja siltojen jäykisteisiin, erilaisia teräsputkituotteita virtausputkistoihin sekä laajennettavia kalliopultteja kaivosten ja tunnelien kattovahvikkeisiin.

Infrastructure solutions

Monipuolinen teräspaalujen mittavalikoima

SSAB:n teräspaalujen mittavalikoima on monipuolinen, joten oikeankokoiset, -pituiset ja -laatuiset paalut on helppo valita mihin tahansa projektiin. Paalut asennetaan joko lyömällä tai poraamalla, ja niiden halkaisijat vaihtelevat välillä 75–1220 mm ja paksuudet välillä 6,3–23 mm. SSAB:n erityisesti paalutusta varten suunnitellut teräslaadut ovat S440J2H ja S550J2H.

Retaining walls

Rakenna kestävämmin lujilla RRs- ja RDs-teräspaaluilla

SSAB:n erikoislujasta teräksestä valmistetut RRs- ja RDs-paalut yhdessä tehokkaan suunnittelun, helpon ja nopean asennuksen ja tavallisia paaluja pienempien ympäristövaikutusten kanssa ovat nyt entistäkin tehokkaampi ratkaisu.

Koska paaluissa käytetään lujempaa S550J2H-teräslajia, niiden kuormankantokyky on 25 % suurempi kuin S440J2H-teräksestä valmistettujen paalujen. Paalujen suurempaa kuormankantokykyä voidaan hyödyntää käyttämällä joko pienempiä paaluja tai vähemmän paaluja. Asiakkaalle tämä tuo merkittäviä taloudellisia etuja, sillä projektin kokonaiskustannukset pienenevät.
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RRs-paalut

 

Korkean lujuuden RRs®- ja RDs®-paalut

Parempi kuormankantokyky ja pienemmät kustannukset

RRs-paaluvalikoimassa on seitsemän yleistä paalukokoa

RR-paalujen erinomaiset ominaisuudet, kuten helppo ja nopea jatkaminen ulkoisilla kitkaan perustuvilla jatkoksilla, sekä muut paalutarvikkeet ovat saatavilla myös lujasta teräksestä valmitetuille RRs-paaluille.

Erikoislujan S550J2H-teräksen edut SSAB:n RRs-paaluissa:

Koska paaluissa käytetään lujempaa S550J2H-teräslajia, niiden kuormankantokyky on 25 % suurempi kuin tavallisten RR-paalujen. Kun paalujen kuormankantokyky on parempi, niitä tarvitaan vähemmän.

Vaihtoehtoisesti erikoislujasta teräksestä valmistettuja RRs-paaluja voidaan käyttää suurempien RR-paalujen sijaan. Hyvä esimerkki tästä on RRs125/6,3-paalukoko, jolla voidaan helposti korvata koko RR115/8.

Customer case Bavo Kademuren harbour

Uutiset

SSAB delivered 114 kilometers of safety barriers to new motorway E18 Hamina-Vaalimaa

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SSAB delivered 114 kilometers of safety barriers to new motorway E18 Hamina-Vaalimaa

SSAB delivered the last 10 kilometers batch of W230/4 side barriers to Hamina-Vaalimaa project in September. W230/4 is the most common safety barrier type in Finland. Complete barrier systems consist of rails, posts, terminals and end pieces, curved and corner sections and fastening accessories. The side barrier is delivered perforated and hot-dip galvanized. All safety barriers are manufactured in SSAB’s Toijala mill in Finland and delivered to the job site according to customer demand. 


Figure 1. SSAB’s safety barriers are being installed to Hamina-Vaalimaa, the final road section of the E18 motorway crossing the country.

The E18 Hamina–Vaalimaa project comprises 32 kilometres of new motorway and the related road arrangements. The road section yet to be built is the final section of the E18 motorway, which will cross the country from Turku to the eastern border. SSAB has had a significant role as safety barrier supplier also in previous projects. The service provider of this PPP project is Tieyhtiö Vaalimaa Oy, and the procuring authority is Finnish Transport Agency. The main contractor is YIT Rakennus Oy.

Reliability of the supplier was essential selection criterion for the contractor YIT Rakennus Oy. It was crucial for the customer that we they can trust supplier’s capability to deliver the extensive delivery amounts during the year. SSAB’s production capacity is high enough for projects like this.

Figure 2. Installation is easy and quick thanks to long rail sections and bolted joints.

Figure 3. The E18 Hamina–Vaalimaa project comprises 32 kilometres of new motorway and the related road arrangements. (Picture: www.liikennevirasto.fi)

The waiting area for heavy vehicles at Vaalimaa, including 461 parking spaces for heavy goods vehicles, was opened in January 2017. The first section of the E18 Hamina–Vaalimaa motorway, from Lelu to Kattilainen, was opened to traffic on 10 February 2017. The work on other motorway sections, from Kattilainen to Virojoki (Part 3) and from Virojoki to Vaalimaa (Part 4), is also progressing as planned. During the project SSAB has been responsible for delivering 114km of safety barriers based on project demands. The construction will be completed in spring 2018 and the motorway opened to traffic.

Figure 4. The waiting area for heavy vehicles at Vaalimaa and the first section of the motorway was opened to traffic in the beginning of 2017. The total construction will be completed in spring 2018.

SSAB’s tailored and ready-to-install safety barrier systems can be used for directing traffic as well as to fence and protect areas. SSAB’s side barriers are well­suited for a variety of purposes. Crash-tested safety barriers are compliant with the requirements of EN 1317­2 and have proven their durability in demanding environmental conditions. Thanks to long rail sections and bolted joints, installation is quick and easy. Discover more: SSAB Safety barriers  



High performance RRs piles and cost-efficient RR pile elements were combined for an optimal foundation solution

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High performance RRs piles and cost-efficient RR pile elements were combined for an optimal foundation solution in Norway

SSAB delivered 5 700 meters of pile pipes and pile elements to the foundations of Kirkebakken apartment buildings in Norway. RR270 and RR320 piles were upgraded to high strength steel S550J2H RRs piles to keep high load capacity after corrosion is taken into account in the top of the piles. By using the higher steel grade S550J2H, pile’s load-bearing capacity can be added by 25 % over that of traditional RR piles. Delivery included 1 176 meters of RRs270/12.5 and 1380 meters of RRs320/12.5. RR220/10 piles were delivered as pile elements with external sleeve splice. Ready-made pile elements enable quick and cost-effective splicing with no welding of the splice needed on site. Total amount of pile elements was 3 168 meters. All piles and pile elements were 12 meters of length.

Figure 1. High strength steel RRs piles and ready-made pile elements enabled good and cost-effective solution for the project.

Piles were first driven through hard moraine of 12 meters and then through silt and clay layers. Piles stopped in moraine after 70 meters. The tendered length of piles was 55 meters, so the project expanded roughly by 30%. The challenge for the customer was the expected excess pore pressure caused by the installation of the piles.

Piling contractor Nordisk Fundamentering AS was satisfied with the delivery and product. “Delivery was quick and reliable. RR220 elements were very easy and fast to install, no welding needed.” says Kai Tiller, Nordisk Fundamentering AS. Contractor of Kirkebakken is Tronrud Bygg AS and project owner is Boligutvikling Frogner AS.

Figure 2. Piling contractor Nordisk Fundamentering AS installed 5.7 kilometers of piles and pile elements.

Kirkebakken is located in Frogner in Sørum municipality, which is situated in south-east part of Norway. Kirkebakken includes 73 new apartments with walking distance to shops, bus and train connections.

Figure 3. Kirkebakken is located in south-east part of Norway. (Picture: www.kirkebakken.com)


Highest wood building in the world is built on RD piles in Norway

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Highest wood building in the world is built on RD piles in Norway

SSAB delivered 3 800 m RD400/12.5 piles for deep foundations in clay and hard moraine. RD piles are installed by drilling and are especially suitable for difficult ground and environmental conditions. Total of 3 800 m piles were installed with average pile length of 50 meters. Piles were delivered in 6 m, 12 m, 16 m, and 18 m lengths. They were manufactured specifically for the project in SSAB’s Oulainen mill. Piles were drilled through the so-called “Mjøs-moraine”, which can be extremely competent and hard. This is located around the Mjøsa region in Norway. There were challenging conditions for the drilling also due to large amount of water in the area from 25 m to 48 m. 



Figure 1. RD piles installed in challenging conditions: deep foundations in clay and hard moraine.

Piling contractor Hallingdal Bergboring AS was pleased with the delivery. “We wanted piles from SSAB because of good tolerances and quality of the piles, which makes it easy to splice the piles at site. Short delivery time and good logistic was also important” says Marius Øen, Hallingdal Bergboring AS. Main contractor for the project is HENT AS and the owner of the project is AB Invest AS.

Figure 2. Piling contractor Hallingdal Bergboring AS is pleased with good tolerances and quality of SSAB’s piles.

Mjøstårnet is located in Brumunddal few meters from Mjøsa, the biggest inland lake in Norway. Tower will be 80 meters high and have 18 floors, which makes it the highest wood building in the world. The building will have foot print of 600 m2 and have a total building area of 11 500 m2. There will be 32 apartments, hotel and a conference center. The tower will be connected to a 4800m2 of swimming facilities.

Figure 3. Mjøstårnet will be the highest wood building in the world. (Picture: www.mjostarnet.no)


Designer tool updates and trainings

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Designer tool updates and trainings

SSAB continuously develops two calculation programs for Infra products; RRPileCalc and PileWallCalc. Latest version 2.10.0.0 of RRPileCalc was launched recently and the next update for PileWallCalc will be launched soon.

Both of the programs are free of charge, only registration is needed for full functionality. Programs can be downloaded from www.ssab.com/infra.

Trainings for designers

SSAB also arranges frequently designer meetings and training sessions for designer tools. During August SSAB arranged several meetings in Norway, Poland and Finland. Topics in these meeting were SSAB’s Infra products and especially above mentioned calculation programs. 

Figure 1. Designer meeting with Rambøll in Oslo, Norway.

Contact our technical support if you want us to organize training session for designer tools or Infra products.

Technology manager: Antti Perälä antti.perala@ssab.com

Underpinning in Turku City Centre

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Underpinning in Turku City Centre

As Oy Brahenlinna is a residential building in Turku City Centre. During recent years the building has been settling unevenly. Installation of new piles to stop the settlement is ongoing.

The eight story building has been built in 1957. Originally the building was made non-settling by founding it to moraine layer with long wooden piles spliced from two logs. Totally old foundations have 728 wooden piles which each have an allowed bearing capacity of 15 tons.

Figure 1. As Oy Brahenlinna

During the time the building has started to settle slowly and unevenly. During recent years the speed of settlement of the building has been 0 to 4 millimeters per year. Uneven settlement has not caused any cracks to structures yet, but inclined floors have caused some problems for the residents.

The reason for settlement is not totally known. The wooden piles have not been found to be decayed. Most likely old wooden piles have not been driven tight enough to the bearing layer. This has caused the toes of wooden piles to slowly settle deeper into the moraine layer.

Main reason for the underpinning of the building is imago. The building has been founded on wooden piles and it has been settling. In Turku area this causes remarkable reduction for the prices of apartments and for the overall imago of the building.

There are about 300…400 old buildings founded on wooden piles or straight on top of very soft clay layer at the central area of Turku. Over 100 of those have already been underpinned during past 20 years. Most common way of underpinning is installation of new steel pipe piles, since they can be installed effectively in low headroom and limited access situations.

Piling with drilled RD and RDs piles in basement

New piling is done with drilled RD and RDs piles. Four different pile types are used in the project; RD140/8, RD140/10, RDs170/10 and RDs170/12.5. “SSAB has very good selection of different pile sizes. This enables designer to optimize the design and to reduce the amount of piles under heavier loads.” says Jarno Rajakallio, structural designer at Sweco Rakennetekniikka Oy. “In this project we ended up with four pile types but only with two different pile diameters. Same diameter enables use of same drilling equipment, but different wall thickness enables optimization of resistance.”

Total number of piles is 103 pcs. Lengths of the piles are almost the same; the lengths are varying from 29 to 30 meters. Total amount of piles is about 3,000 meters.

The courtyard area of the building is in the use of residents during the whole project time. This causes naturally some special arrangements for storage of construction material. “With this kind of projects there is often very limited space available around building for material storage”, says Esko Kauti, site manager of Skanska Infra Oy. “We ended up using our own depot near Turku to store pile elements. Trucks from SSAB deliver pile bundles there and then we use our own transportation to bring only small amounts of piles at the right time to site. This arrangement has helped us a lot.”

Almost all piles are drilled from inside the building, from the basement level. Confined spaces require small piling rigs and other special techniques. In most of the area the height of the basement is 2.2 meters, but in almost 1/3 of the area the height of the basement is only 2.0 meters. Small drilling rig is shown in Figure 2.

Figure 2. Small drilling rig for underpinning projects

Piles are made from 1.0 m and 1.2 m long elements. The splicing of the piles is done by welding. Both hand welding and mechanized robot welding are used in this project. For mechanized robot welding a special type of beveling is used, shown in Figure 3. The quality assurance of welding of splices contains pre-tests on-site and ultrasonic testing for certain amount of welds according to Finnish Piling Manual PO-2016.

Figure 3. Beveling type used for mechanized robot welding

Huge amount of old wooden piles has caused some problems during installation of new piles. Almost all new piles are having contact with old wooden piles during drilling. This naturally causes some delays, since drilling through wood is much slower than through soil. Bigger problem than delay is possible damages the drill bits can be facing from contact with wooden piles and especially from contact with steel parts at the splices of old wooden piles. At the moment almost 14 % of installed piles have been abandoned due to these damages.

Very little disturbance for old foundations

Underpinning work always causes some disturbance for the old foundations. In this case the settlement speed of the building has not increase due to underpinning. Most likely this is due to good condition of the wooden piles.

Piling work started at April 2017. According to schedule the work should be ready and premises returned to residents at the end of the 2017. At the end of August half of the piles had been drilled.

Main contractor: Skanska Infra Oy
Structural design: Sweco Rakennetekniikka Oy
Geotechnical design: Ramboll Finland Oy
RD pile supplier: SSAB Europe Oy

New sales contacts in Norway and Germany

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New sales contacts in Norway and Germany


We are pleased to introduce you our new sales persons who will be available for you in Norway and Germany.

Tim Kalthaus
Regional Sales Manager, Germany 
+49 171 5528575
tim.kalthaus@ssab.com

Bente Hagen Taksdal
Sales Manager, Norway
+47 909 83 417
bente.hagen.taksdal@ssab.com

Introducing SSAB’s Oulainen tube mill

RD® pile wall drilled extremely near to old buildings in K6, Helsinki

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RD® pile wall drilled extremely near to old buildings in K6, Helsinki

Skanska is developer of a new office building called K6 in Helsinki, Finland. Three underground floors just next to existing buildings mean demanding excavations. RD pile wall is used as permanent retaining wall to support excavation and to create final wall structure.

Since Skanska is developer of K6, Skanska will fund and contract the building. Retaining walls, excavations and foundations are done by Skanska Infra Oy and other structures are done by Skanska Talonrakennus Oy.


Figure 1. Skanska’s construction site

Ground conditions at the site are demanding for deep excavations and installation of retaining walls. On top of natural soil layers is varying fill layer consisting different kind of granular soils. Natural soil layers consist mainly of sandy and silty soils. Below these soft soils is a very hard moraine layer and the bedrock. First choice for retaining walls was secant pile wall. Skanska made an installation test with sheet piles and noticed moraine layer to be too dense and hard to achieve economical installation speed for secant pile wall. This lead to change the retaining wall type to RD pile wall.

Before the final decision of the type of the retaining wall was done, SSAB’s technical support was participating in finding the most suitable solution. “We have found SSAB’s technical support very useful in this project”, says Pasi Mäkinen, Project Manager from Skanska Infra Oy. “During the design phase of the project we had couple of technical meetings with designers and SSAB. We presented our ideas to both designers and SSAB and got good feedback and new ideas. Some ideas needed little fixing, but due to these meeting we ended up with highly sophisticated solution for this very demanding project.”

Drilling of RD pile wall began at November 2016 and last pile was drilled in March 2017. No problems were encountered during installation. First anchor level at the top of the piles is now ready and excavation has begun.


Figure 2. Drilling of RD pile wall at K6 site

Existing buildings nearby caused some special procedures for making of RD pile wall. First building, on left hand side in Figure 1 is founded on top of natural soil layers. To prevent possible settlement of the building a jet grouting wall was done just beside the old foundations. This jet grouting extended from top of the bedrock all the way to the bottom of the foundations. RD pile wall was drilled as close to the old building as possible, the centers of the RD piles are only 1200 mm from the surface of the old façade, shown in Figure 3. Jet grouting was also used to protect old concrete piles of another existing building, on right hand side in Figure 1. In this case jet grouting was used only close to bottom end of concrete piles. The function of this jet grouting was to ensure end bearing resistance of the concrete piles when RD pile wall is drilled close to them. Both buildings have been monitored during the drilling of RD pile wall, and monitoring will continue during the excavation phase.


Figure 3. RD pile wall drilled just next to old building

RD pile wall is made of two pile sizes RD600 and RD700, shown in Figure 4 in red and yellow respectively. RD700 is used in area where the surface of bedrock is at deepest. SSAB delivered 233 RM-RF interlocked RD600/12.5 piles and 32 RM-RF-interlocked RD700/12.5 piles. All piles were S440J2H steel grade. The delivery included in total over 700 tons of steel and 3 500 meters of RM-RF interlocked RD piles.


Figure 4. Drawing of RD pile wall (red piles = RD600, yellow piles = RD700)

All piles of RD pile wall were drilled at least 4d (2.4 m for RD600 and 2.8 for RD700) into the bedrock. In areas where bedrock surface needs to be lowered by blasting, drilling depth was deeper. After drilling, the annulus between pile pipe and bedrock was grouted through injection channel in RF interlock profile to achieve a rigid connection between pile toe and bedrock. The use of rigid connection between RD pile wall and bedrock has made it possible to reduce the amount of support levels and number of anchors significantly. In some parts of the 10 m high RD pile wall there is only one anchor level at the very top end of the pile wall.


Figure 5. Anchor level at the top end of the RD pile wall

The rigidness of the connection between pile toe and bedrock is ensured by monitoring during excavation. The deformation and displacement of the RD pile wall is monitored with tachymeter from prisms glued to the piles (prisms can be seen as yellow squares in piles in Figures 5 and 7). Measured deformations are compared to theoretically calculated deformations to ensure correct behavior of the wall structure. Additionally some of the anchors are equipped with load cells to monitor exact anchor forces in real time. All anchors are temporary anchors. In final stage the concrete slabs will function as a support for the RD pile wall.

Regardless of the rigid connection at the pile toe, more than one anchor level is needed in some areas of the wall. In these areas a special design of the wall is used. To avoid drilling of holes for anchors through the RD piles, some gaps were left between RD piles. These 200 mm wide gaps were filled by jet grouting to ensure watertightness of the wall, shown in Figures 4 and 6 in blue. In these areas the anchors are positioned at same locations on top of each other and holes for anchors are drilled through jet grouting columns. These discontinuities in the RD pile wall have been taken into account when calculating the actual bending resistance and stiffness of the RD pile wall.


Figure 6. In some areas of the wall more than one anchor level is needed.

Watertightness of interlocks during construction period is achieved with bitumen sealant. Sealant material was added to female interlock profile at SSAB’s pipe mill. To ensure watertightness for the whole service life of the RD pile wall, a steel plate will be welded in front of all interlocks, see Figure 7. The gap between interlock and steel plate will be filled by grouting. This steel plate and grouting technique is used also in places where jet grouting columns are installed between RD piles.


Figure 7. Steel plates welded in front of interlocks

After excavation the bedrock surface in some areas is at too high level and it needs to be blasted way. These areas are sown with green color in Figure 4. In the corner of the building (lowest corner in Figure 4), some 3.0-3.5 m of bedrock will be blasted away just next to RD pile wall. Due to over sizes drill bits the bedrock and pile pipe are not in contact with each other, but still this rock blasting will be done with precaution.

In final state the RD pile wall will not take only the lateral loads from soil pressure, it will also supports the façade of the building on top of it. RD pile wall will remain as a final wall surface at the underground floors. The surface of the piles will only be sandblasted and painted to achieve good looking surface. Sufficient resistance of the RD pile wall in case of fire is ensured by concreting all piles and by installing reinforcement to every fifth pile in the wall.

  • Main contractor, foundations: Skanska Infra Oy
  • Geotechnical design: Sito Oy
  • Drilling contractor: Sotkamon Porakaivo Oy
  • RD pile wall supplier: SSAB Europe Oy


Extensive piling work, over 33 kilometers of steel piles, ongoing in Stockholm

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Extensive piling work, over 33 kilometers of steel piles, ongoing in Sundbyberg, Stockholm

There is an extensive piling worksite in north-east of Stockholm. Construction of Fabriksparken in Sundbyberg will last 4 years, mainly consisting of apartment buildings. Piling in Fabriksparken started in April 2017 and will continue until autumn. SSAB delivers in total 2 680 pieces of RR pile elements and 200 pieces of RD pile elements. In total over 1 600 tons of steel. All piles are steel grade S460MH. RR pile elements are 12 meter of length and RD pile elements 12 meter and 4 meter of length. SSAB delivers also rock shoes and bearing plates.


Figure 1. SSAB delivers in total 1 600 tons of steel piles to Fabriksparken.

Piling contractor is Rovalin AB, Swedish foundation engineering company installing both drilled and driven piles. In Fabriksparken almost all piles will be driven. One corner of the area was very close to the bedrock and therefore had to be drilled. In total 200 RD piles were drilled.

“Piling has been proceeding well and as planned. There have only been some changes to the time schedule. There have been 3 piling machines for drilled and driven piles at this site. Piling for the first apartment building is finished now and we will start piling for the next apartment building in early September. It will take about 1.5 months to finish. Reason for choosing SSAB as a supplier for piles was quality, price and supply performance“, says Johan Saarela, CEO Rovalin.


Figure 2. Sofie Sjörs is leading the work of piling contractor Rovalin AB in Fabriksparken.

Fabriksparken is developed by Skandia fastigheter, one of Sweden’s largest building developers. Fabriksparken will have 450 apartments, penthouses and townhouses. There will be a market place, bars, outdoor restaurants, small shops, food stores and offices. New construction will be brick buildings, which links well to the area and its history. Construction work will be completed in 2021. Commuting to Fabriksparken is easy since there are subway, commuter train as well as buses available. Both the downtown of Stockholm and the airport is less than a quarter of an hour away.


Figure 3. Fabriksparken in Sundbyberg, Stockholm will have 450 new apartments by 2021.



Introducing new specialists in SSAB’s technical support of infrastructure products

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Introducing new specialists in SSAB’s technical support of infrastructure products

Technical support provides consulting during project design and execution stages. We assist in choosing the most economical solutions for our customers which is typically achieved by using higher strength RRs and RDs piles. Utilizing higher strength steel is advantageous for our customers by reduced costs and it is aligned with our vision of stronger, lighter and more sustainable world.

Technical support has written handbooks which are distributed through our downloads and in SSAB events. The handbooks include available pile sizes and pile accessories along with other relevant information including product properties and installation guidelines. We also organize product training of piles and accessories to help getting familiar with our products and their capabilities.

SSAB has developed RRPileCalc and PileWallCalc softwares for analyzing the performance of single piles, RD pile walls or Combi walls in given conditions. The softwares are available for downloading on our website. Technical support offers software training for designers and other interest groups to achieve increased efficiency by utilizing our design tools.


Contact us:

Antti Perälä
Technology Manager  antti.perala@ssab.com 
Teemu Yli-Kovero Product Manager teemu.yli-kovero@ssab.com
Anssi Hyvärinen Technology Specialist anssi.hyvarinen@ssab.com
Sondre Smeland Technical Manager, Norway sondre.smeland@ssab.com

SSAB’s solutions for infrastructure construction attracted customers at Grundläggningsdagen and Påldagen in Sweden

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SSAB’s solutions for infrastructure construction attracted customers at Grundläggningsdagen and Påldagen in Sweden

Two established events for foundation construction experts take place in spring time in Sweden. SSAB was again present at the events to meet customers and other interest groups.

Grundläggningsdagen in Stockholm

The Foundation Day is an annual meeting point for people and companies in the geotechnical field in Sweden. The event took place March 16th at the Stockholm International Fairs and attracted over 700 participants.

SSAB’s solutions for foundation construction, steel pipe piles and retaining walls, were presented at our stand. “There were a lot of good encounters with customers and designers who were visiting our stand at the exhibition. RR® and RD® piles are very well known in the Swedish market and have excellent reputation as piling solutions. Market situation in Sweden is positive at the moment and the demand for our products is very good”, says Kjell Kjellberg from SSAB.


Figure 1. Kjell Kjellberg presenting SSAB’s solutions at the stand.

Påldagen in Gothenborg

The Pile day is organized by Pålkomissionen, Swedish Pile Commission. The annual event took place May 4th in Kajskjul 8 in Gothenborg. SSAB’s solutions for foundation construction, steel pipe piles and retaining walls, were presented at our stand. The event attracted more than 250 foundation construction experts.

Gothenburg region is expanding heavily and the rate of construction is now higher than ever. Over the next 20 years there will be projects worth 1,000 billion kronor initiated in the Gothenburg region. Pile day included excursion to Hisings bridge, one of ongoing construction projects in Gothenburg. The bridge is being built in downtown across the Göta River. Vertical-lift bridge of steel and concrete will be built by Skanska in a joint venture with MT Højgaard. Project is expected to be completed 2022. SSAB is delivering drilled RD400/12.5 steel piles to ongoing piling works to Skanska. The longest piles will be more than 100 meters.

“There will be a lot of opportunities for steel piling in the Gothenburg region during the coming years. For example many historical buildings need underpinning of foundations. SSAB’s mechanical splices for RR and RD piles make splicing of short pile elements fast and cost-efficient. One of our major underpinning piling deliveries to Gothenburg recently was in Kv Högvakten to four of Gothenburg’s oldest buildings”, says Mariana Bohman from SSAB. Watch video: Two different methods for underpinning historical buildings in Sweden


Figure 2. Påldagen attracted more than 250 foundation construction experts in May in Gothenburg.

SSAB’s pile products included in the most recommended category in Swedish Sundahus environmental assessment

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SSAB’s pile products included in the most recommended category in Swedish Sundahus environmental assessment

Environmental assessments help companies to reduce their environmental impact by offering comparable data on building materials.

Sundahus assessment

SSAB’s steel piles have been rated with a value A, which is the most recommended category. All RR, RRs, RD and RDs products are included and they are registered under SSAB Europe Oy.

SundaHus offers property owners security through a wide range of services for environmentally conscious material choices. With a web-based system and counseling, SundaHus is a comprehensive solution for systematic efforts at phasing out hazardous substances in a building's lifecycle.

Byggvarubedömningen – Building material assessment

SSAB’s steel piles are also registered under SSAB Europe Oy in Byggvarubedömningen, Building material assessment. The assessment has been updated during spring 2017. SSAB’s steel piles have been rated with the highest grade ”Recommended” in Byggvarubedömningen classification.

SSAB offers comprehensive data on products to ease customers to improve their performance in sustainability and overall efficiency

Life cycle assessments data for SSAB’s products is available in the form of Environmental product declarations (EPDs). Manufacturing chain from raw material to finished product is carefully managed.

SSAB has introduced CE marking for infrastructure products. Declarations of Performance (DoP) indicate the technical characteristics of CE marked products. Download EPDs and DoPs here.

 

Foundation work for a new art museum beneath historical Lasipalatsi square in Helsinki finished in May 2017

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Foundation work for a new art museum beneath historical Lasipalatsi square in Helsinki finished

New art museum with 2 000 m² exhibition hall is being built beneath the Lasipalatsi square in the heart of Helsinki. In connection with the construction of the art museum the protected Lasipalatsi building is being renovated. Underground building is in total 6300 brm2, requiring excavation of 34 000 m3 and quarrying of 14 000 m3. Foundation construction of the underground building started in January 2016.


Figure 1. New art museum is being built beneath the Lasipalatsi square and old protected Lasipalatsi building is being renovated.

Special characteristics of the project have been very busy urban environment and protection of historically valuable Lasipalatsi building. Renovation of architectural monument has required continuous discussions and reviews with Helsinki city museum. Busy urban environment has made material logistics challenging. It is estimated that 25 000 people are passing the work site during one day. There are subway tunnels located just below the underground building, it is only 8 meters from the excavation to the roof of the tunnels. Also waste water tunnel is located in the scope of the work site. In the middle of the underground building’s work site is old protected chimney.


Figure 2. Construction work ongoing in Lasipalatsi square in May 2017.

Piling work of the foundation has been executed by KFS Finland Oy, who is working as a subcontractor for Kreate Oy. KFS Finland Oy is responsible for the drilling of piles, jet grouting and retaining walls of the excavation. SSAB delivered in total 113 ton of steel piles and 316 bearing plates to the project. All piles were S440J2H steel grade. Steel pile delivery included 422 pieces of RD140/10 in exact lengths, most of the pile elements were 2.0 meters length. Delivery included also 106 pieces of RD220/12,5, of which almost all 12.0 meters length and 21 pieces of RD170/10, all 12.0 meters length.

Work site supervisor Matti Heinonen, KFS Finland Oy, has been satisfied with the project execution: “RD piles drilled by us will take the vertical loads of the domes. There will be altogether five domes in the underground building. Largest dome is 30 meters of diameter. Also the vertical loads of the underground building’s walls are taken by steel piles. In the middle of the Lasipalatsi square there is a chimney which is protected. The chimney used to be ground supported, but now it is also supported by steel piles.” He continues: “Drilling of RD piles was successful in this project situated in a historical site. Project started in the beginning of 2016 when the first pile delivery arrived to the site on February. There were altogether 9 pile deliveries by SSAB during one year. Last piles were delivered in March 2017.”


Figure 3. Old chimney in the middle of the Lasipalatsi square is now also supported by steel piles.

Construction of the new museum started in January 2016 after the Helsinki City Council had given its approval for transferring the ownership of Lasipalatsi to the new real estate company in May 2014. Prior to that the Association “Konstsamfundet” had put forth a proposal to build a new art museum contiguous to the existing Lasipalatsi and beneath the Lasipalatsi Square. The project management service is performed by Haahtela-rakennuttaminen Oy. Cost estimation for the total project is 46,6 million euros. The museum will begin its operations in 2018. With the new museum, designed by architectural firm JKMM, Lasipalatsi will retain its distinctive character while the adjacent Lasipalatsi square will undergo considerable modernization.


Figure 4. Lasipalatsi square is located in the heart of Helsinki. The museum will begin its operations in 2018.


New customer in Netherlands impressed by SSAB’s solution and high service ability

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New customer in Netherlands impressed by SSAB’s solution and high service ability

New customer Friso Civiel BV in Netherlands approached SSAB with a need of foundation solution in a tight time frame. SSAB’s steel piles were used as a foundation for a concrete bridge for pedestrians over the Noordhollandsch Canal in Amsterdam. The bridge connects the surrounding residential areas with the Noorderpark. It is part of a circuit track in the new central park in North Amsterdam.


Figure 1. SSAB delivered RR800/20 piles for bridge foundation and RR900/20 for dolphins.

SSAB’s delivery consisted of foundation piles RR800/20 (Ø813 x 20.00 mm), 27.5 m in length and dolphin piles RR900/20 (Ø914 x 20.00 mm), 23.5 m in length that protect the pillars of the bridge. In total 209 tons of piles were delivered to the project. All steel piles were installed to water. Concrete piles were used on land.


Figure 2. All steel piles were installed to water.


Figure 3. Dolphin piles with black and white paint.

Project coordinator Tom van der Meulen, Friso Civiel BV, was pleased with the co-operation with SSAB: "The time between contract, procurement and construction for this project was short. It was tough to find the requested specification from the market on time and within budget. In the end we found SSAB who provided a highly customized advice for this project and suggested with the help of our engineer the right solution for this great project allowing realization within our boundaries.” He continues: “Clear communication, clear and well met agreements. In short: Finnish quality. Also the cooperation with Braspenning for the coating was super."


Figure 4. Pedestrian bridge over the Noordhollandsch Canal connects the surrounding residential areas with the Noorderpark.

Northern bridge over the Noordhollandsch Canal – part of circuit track in new central park

In 2004 the City Council chose the competition design of West 8 for the transformation of the urban landscape into a new central park. The three existing parks, Volewijkspark Oost, Volewijkspark West and Florapark, which were isolated from each other needed to be tied together thus creating one central park. These parks are positioned in between and along the road and the Noordhollandsch Canal.
West 8’s design proposed a broad circuit track that linked the existing disjointed parks, with new bridge connections which span across the canal and over the road and railway line. Part of the circuit is the northern bridge over the Noordhollandsch Canal. This bridge is the east-west link for slow traffic. It is important for the local residents of eastern part of the city district Noord and also allows good access to the new swimming pool area.


Figure 5. New pedestrian bridge is part of the circuit track that connects different parks into new central park.

The circuit track can be used for walking, cycling, skating and jogging. New central park is to be one of the key green pockets of Amsterdam that functions as a central meeting point, with spaces that can be used for large gatherings and functions.

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