Combi wall

Combi wall

Retaining wall structures based on steel piles are often the best solution to replace traditional, labor-intensive cast-in-place based retaining wall structures.

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    RR® large diameter piles can be built into a continuous combi wall by welding interlocking sections or complete sheet piles into them. In a combi wall, piles act as the load-bearing structure, while sheet piles installed in between make the wall continuous.

    Thanks to SSAB’s high-grade steel, our combi walls have excellent bending stiffness and resistance.

    Applications:

    • Retaining wall structures
    • Building foundations
    • Wharves and piers
    • Road and railway structures
    • Bridges
    Combi wall

    Availability

    Combi wall

    Standard piles and availability of steel grades of Combi pile wall

    X = Steel grades S355J2H, S440J2H and S550J2H O = Steel grades S355J2H and S440J2H

    *) Please contact our sales for availability

    Wall thickness
      8  10  12.5  14.2  16  18  20  22  23 
    RD400   X  X  X            
    RD450  X  X  X            
    RD500   X  X  X  X  *        
    RD550   X   X  X  X  *        
    RD600   X  X  X   X  X  O      
    RD650   X  X  X  X  X  O      
    RD700   X  X  X  X  X  X  O    
    RD750   X  X  X  X  X  X  O    
    RD800   X  X  X  X  X  X  O  *  
    RD900     X  X  X  X  X  O  *  
    RD1000     X  X  X  X  X  O  *  *
    RD1200     X  X  X  X  X  O  *  *

    Steel grades

    Standard steel grades of SSAB’s retaining walls. Against special order, the piles may also be delivered in MH steel grades according to standard EN10219 or X grades according to API5L.
    Steel grade
    Carbon equivalent
    		 Chemical composition, max. Mechanical properties








    Impact strength

    		CEV max. [%] C [%] Mn [%]
         		P [%] S [%] fymin [MPa] fu [MPa]

    A5 min [%]

         		T [°C]

    KV min [J]
    S355J2H 0.45
         		0.22
         		1.6
         		0.03
         		0.03
         		355 470-630 20 -20  27
    S440J2H 0.45
         		0.16
         		1.6
         		0.02
         		0.02
         		440 490-630 17 -20  27
    S550J2H
         		0.47
         		0.12
         		1.9
         		0.02
         		0.02
         		550 605-760 14 -20  27

    Order & delivery

    To order RD® pile wall and Combi wall, please contact our sales.

    SSAB applies the General Conditions, ALBIF 2000, for deliveries with the addition that the parties will comply with applicable legislative and regulatory requirements and refrain from participating in any corrupt business practices.

    The technical terms of delivery for steel piles manufactured by SSAB are in accordance with the EN 10219-1 and ETA-12/0526. The dimensions and tolerances are as defined in EN 10219-2 and ETA-12/0526. Engineering work is in accordance with standard EN 1090-2.

    Steel piles are delivered with bundle tags and SSAB's pile markings to enable full traceability and identification.

    Type 3.1 material certificate will be provided according to the standard EN 10204.

    Design tools

    Software for fast and easy design

    RRPileCalc is a design program for SSAB's steel piles. Eurocodes as well as National codes and instructions are applied in the end-bearing pile design.

    PileWallCalc design tool enables easy calculation of cross section properties and bending resistances of the pile walls. The program calculates the bending resistances and normal force resistances of RD® pile wall, Combi wall and Zig-Zag Combi wall.

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    Environmental responsibility and sustainability

    SSAB develops new products and services in order to improve our customers’ performance in sustainability and overall efficiency.

    Life cycle assessment data for SSAB’s products are 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.

     

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    Customer cases

    • higher strength steel in district heating pipeline core tubes

      Helen decreased carbon footprint in Vuosaari power plant by using SSAB’s higher strength steel tubes

      LOGSTOR Finland delivered to Helen Vuosaari power plant district heating pipe line that were produced with thinner steel core pipelines made of higher strength steel. This was the first large size project for Helen to use higher strength steel in district heating pipeline. Higher steel grade enables customer to use lower material thickness tubes in steel core of pipelines which not only reduce weight of the pipes during the transportation but also prolongs lifetime of the pipelines. Power plant is benefiting of the longer lifetime compared with traditional solution and at the same time environment aspect with lower carbon footprint are enabled.

    • Piles in new Ålesund harbor

      Flatholmen quay in Ålesund, Norway – build on LDP from SSAB

      Ålesund is a large Norwegian harbor for cargo and cruise ships. The fishing industry is well-established in the area together with manufacturing of furniture. This may explain the 65,000 containers that move through the area each year, making it one of Norway’s largest container harbors. Two billion fishmeal is exported from this region worldwide each year. Ålesund is also located on the doorstep of picturesque Norwegian fjords and majestic mountains, providing easy access for cruise tourism.

    • Overview of Narvik Harbour with LKAB’s bulk port

      Expansion of Narvik cruise quay

      Narvik Harbour consists of four ports including LKAB’s bulk port and the central cruise quay. The harbor is ice-free and well protected from the weather. In 2005, Narvik was granted the status of "Motorways of the Sea" port in the EU system. Only Oslo has this status in addition to Narvik in Norway. The quay area also has railroad tracks connecting Narvik to the rest of Scandinavia and central Europe.

    See all customer cases