Driven RR large diameter pile

Dimensions

Our technology makes it possible to manufacture 36-metre-long steel pipes without any splice welds. With splice welds, Ruukki can deliver steel pipes up to the maximum length of 45 metres. Cut-to-size piles made to the customer’s order minimise on-site splice welding, which cuts down on the turnaround time and construction costs.

In addition to ready-made steel piles, Ruukki has stocks of hot-rolled steel coils. This means that manufacture of custom cut-to-size piles can be started very quickly and the products can be delivered to the customer on a tight schedule. In addition to the sizes presented in the table below, the steel pipes can be manufactured with customer-specific diameters and wall thicknesses. Wall thickness can be specified to an accuracy of 0.1 mm.

Standard dimensions and availability of steel grades

Diameter		Wall thickness / Weight (kg/m)
mm		8.0 mm	10.0 mm	12.5 mm	14.2 mm	16.0 mm	18.0 mm	20.0 mm
	inches	0.31 ″	0.39 ″	0.49 ″	0.56 ″	0.63 ″	0.71 ″	0.79 ″
406 mm	16 ″	78.6	97.8	121.4
508 mm	20 ″	98.6	122.8	152.7	172.9
559 mm	22 ″	108.7	135.4	168.5	190.8	214.3
610 mm	24 ″	118.8	148.0	184.2	208.6	234.4	262.8
711 mm	28 ″	138.7	172.9	215.3	244.0	274.2	307.6	340.8
762 mm	30 ″	148.8	185.5	231.0	261.9	294.4	330.3	366.0
813 mm	32 ″	158.8	198.0	246.8	279.7	314.5	352.9	391.1
914 mm	36 ″	178.7	222.9	277.9	315.1	354.3	397.7	440.9
1016 mm	40 ″	198.9	248.1	3093	350.8	394.6	443.0	491.3
1220 mm	48 ″	239.1	298.4	372.2	422.3	475.1	5336	591.9

	Available with steel grades S355J2H, S440J2H, S550J2H, X60, and X70.
	Available with steel grades S355J2H and S440J2H.

Storable steel pipe piles (L=12 m)

Dimensions diameter x wall thickness (mm)

Steel grade

406 x 12.5

S355J2H

508 x 12.5

S355J2H

610 x 12.5

S355J2H

711 x 12.5

S355J2H

813 x 12.5

S355J2H

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Accessories

In the Nordic countries, end-bearing RR large diameter piles are usually equipped with RR rock shoes. Rock shoes:

Shield the bottom end of the pile against loads created during the installation
Distribute the loads directed to the pile end as evenly as possible over the cross-section of the pile pipe
Prevent lateral sliding of the pile end

There are three types of rock shoes. The most common shoe type is equipped with a structural-steel dowel or a hardened-steel dowel. In the rock shoe with the hollow dowel filled with concrete, a tension bar can be injected into the rock by drilling through the rock shoe.

The pile end can also be shielded with bottom plates of a variety of types in conditions where a rock shoe is not required.

If the pile is to be installed as an open-bottom-end pile, a reinforcement ring can be installed on the bottom end of the pile already in the factory to shield the pile during installation.

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Coating

Paint coating

For harbour structures or for otherwise severe conditions, it may be beneficial to protect entire piles or parts of them with external coatings. Ruukki delivers anti-corrosion coated steel pipes with protective painting or triple HDPE coating. The protective painting will be performed with protective paint combinations in accordance with EN ISO 12944-5.
Preliminary treatment, implementation and control of the painting, and testing of the coating are performed as described in EN ISO 12944. Also, interlocking sections and steel sheet piles can be corrosion-protected with protective coating.

Triple-layer coating

The implementation and quality assurance of the triple-layer coating are performed according to the standard DIN 30 670. In this solution, an epoxy film protects the pile from corrosion while a polyethylene film shields the epoxy film against damage. The triple-layer coating can be applied to 10–18.1-metre-long pipes. Longer pipes are splice-welded, and the joint is protected with joint coating.

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Properties

The steel grade of the large diameter piles are S355J2H, S440J2H, S550J2H, X60 and X70.

Chemical composition, max

Steel Grade	C (%)	Mn (%)	P (%)	S (%)	CEV(%)
S355J2H	0.22	1.60	0.030	0.030	0.39
S440J2H	0.16	1.60	0.020	0.018	0.39
S550J2H	0.12	1.90	0.020	0.015	0.43
X60	0.19	1,75¹⁾	0.030	0.030	0.43
X70	0.19	2,00¹⁾	0.030	0.030	0.43

1) Content of Mn can be increased when C content is decreased.

Mechanical properties

Steel Grade	fy min (MPa)	fu (MPa)	A5 min (%)	T (°C)	KV min (J)
S355J2H	355	470-630	20	-40	27
S440J2H	440	490-630	17	-40²⁾	27
S550J2H	550	605-760	14	-20²⁾	27
X60³⁾	415	≥520	18	0	27
X70³⁾	485	≥570	19	0	27

2) Impact strength requirement must be agreed separately with material thicknesses over 12.5 mm.

3) According to API 5L.

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Design tools

Steel pipe piles are dimensioned in accordance with valid European (CEN) norms and standards and/or national regulations and guidelines. The extensive size range and steel grade alternatives of Ruukki steel pipe piles support economical foundation design.

Piles may be dimensioned either as steel structures or, in the case of concrete-filled piles, as steel-concrete composite structures. Corrosion of steel piles is generally taken into account by subtracting the corrosion allowance corresponding to the design life of a structure from the wall thickness of the cross-section.

Static bearing-capacity formulas or methods based on sounding resistance can be used in the geotechnical dimensioning of piles. The geotechnical capacity of a pile is the sum of tip and shaft resistance. The load-bearing capacity of driven RR piles is usually based on tip resistance. The geotechnical capacity of driven piles can be determined during installation by dynamic piling formulas or advance piling simulations based on the stress wave theory.

The geotechnical capacity of piles and validity of the end driving criteria can be ensured by dynamic or static test loadings. The selection of pile installation equipment and installability are key issues in pile design. In the selection of equipment for driven piles, it must be ascertained that the equipment is able to install the piles to the depth required to attain the necessary geotechnical capacity.

The selected equipment must also be efficient enough to mobilise the required bearing capacity in dynamic test loading. Alternatively, a separate test hammer can be used. It must be ensured that the equipment used does not damage the piles during installation.

Download RR piling manual

Design software and objects

To make both architectural and structural design work easier with accurate product information in 3D form, Ruukki offers a selection of free CAD / BIM-objects and tool sets developed as add-ons for professional designing software such as ArchiCAD and Tekla Structures to be downloaded from the Software Toolbox.

Download Ruukki pile component package for Tekla Structures 15.0 / 16.0 / 16.1

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Order and delivery

The pile pipes are delivered equipped with load labels that indicate the manufacturer and dimension data as well as the steel grade of the RR piles. If these markings are not present, the pile pipe must not be used in RR piles.

A material certificate of the SFS-EN 10204, type 2.2, standard at minimum will be provided for the steel pipe material. Also a material certificate as defined in SFS-EN 10204 for type 3.1 is possible.

The technical terms of delivery for steel pipes manufactured by Ruukki are in accordance with the EN 10219-1 or DIN 17120 standards. The dimensions and tolerances are as defined in EN 10219-2.

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