prEN 10379
(Main)Steel sheet piles - Test methods
Steel sheet piles - Test methods
This document specifies the requirement for testing of special properties of hot-rolled steel sheet piles.
Spundbohlen aus Stahl - Prüfverfahren
Dieses Dokument legt die Anforderungen an spezielle Prüfverfahren für warmgewalzte Spundbohlen fest.
Palplanches en acier - Méthodes d’essais
Le présent document spécifie les prescriptions relatives aux essais des propriétés spéciales des palplanches en acier laminées à chaud.
Jeklene zagatnice – preskusne metode
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2024
Jeklena obešala - Preskusne metode
Steel sheet piles - Test methods
Spundbohlen aus Stahl - Prüfverfahren
Palplanches en acier - Méthodes d’essais
Ta slovenski standard je istoveten z: prEN 10379
ICS:
77.140.50 Ploščati jekleni izdelki in Flat steel products and semi-
polizdelki products
77.140.70 Jekleni profili Steel profiles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2024
ICS 77.140.50
English Version
Steel sheet piles - Test methods
Spundbohlen aus Stahl - Prüfverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 3.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10379:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General requirements . 4
5 Test of the resistance of crimped points of U-shaped sheet piles . 4
5.1 General. 4
5.2 Test specimen . 5
5.3 Testing and evaluation. 7
6 Test of the interlock resistance of straight web sheet piles . 8
6.1 General. 8
6.2 Test specimen . 8
6.3 Testing and evaluation. 9
7 Test of interlock performance of U-shaped and Z-shaped sheet piles . 10
7.1 General. 10
7.2 Declutching criterion and tensile criterion . 10
7.3 Interlock stiffness . 13
7.4 Resistance of the interlock of U-shaped sheet piles in case of local load introduction
................................................................................................................................................................... 14
8 Test report . 15
Bibliography . 16
European foreword
This document (prEN 10379:2024) has been prepared by Technical Committee CEN/TC 459/SC 3
“Structural steels other than reinforcements”, the secretariat of which is held by DIN.
1 Scope
This document specifies the requirement for testing of special properties of hot-rolled steel sheet piles.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1990, Eurocode - Basis of structural and geotechnical design
EN 1993-5, Eurocode 3 - Design of steel structures - Part 5: Piling
EN 10020:2000, Definition and classification of grades of steel
EN 10079:2007, Definition of steel products
EN 10248-2, Hot rolled sheet piling of non alloy steels - Part 2: Tolerances on shape and dimensions
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature
(ISO 6892-1)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 10020:2000 and
EN 10079:2007 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
4 General requirements
Unless otherwise specified by technical delivery condition or agreed between manufacturer and
purchaser the tests shall be carried out on the final steel sheet pile.
The tests shall be carried out by suitable trained operators. In the case of third party tests this shall be
agreed upon between manufacturer and purchaser at the time of enquiry and order.
5 Test of the resistance of crimped points of U-shaped sheet piles
5.1 General
5.1.1 In the following, provisions are given for the determination of the resistance of crimped points by
testing, in order to improve the transmission of shear forces in the interlocks of U-shaped sheet piles
according to EN 1993-5.
5.1.2 Two items shall be addressed in the tests:
— determination of the characteristic ultimate resistance R of one crimped point;
k
— verification that the minimum stiffness criterion for the crimped point is fulfilled.
5.1.3 These two items shall be determined for the representative interlock geometry of the sheet pile.
If variation of the steel grade has a substantial influence (more than 10 %) on the test result, it shall be
taken into account when evaluating the tests and the results shall then be given in relation to the steel
grade. The data on the crimped points to be used for design shall be obtained from tests for the relevant
crimped point layout (single, double or triple points).
If different shapes of sheet piles are provided with the same nominal interlock geometry, the results
obtained may be applied to all these sheet piles.
The results obtained using this procedure for a representative interlock geometry cover also the
manufacturing tolerances of the interlocks.
5.1.4 The determination of the mechanical properties of the steel used for the specimen in these tests
shall be carried out according to EN ISO 6892-1.
5.1.5 The determination of the characteristic ultimate resistance R and the verification of the stiffness
k
criterion shall be carried out by compression tests using test specimen in accordance with 5.2.2 and 5.2.3.
5.2 Test specimen
5.2.1 For the manufacturing of the test specimen the following aspects shall be taken into account:
— the specimen (sheet piles) shall be tested as-rolled;
— the specimen shall be cut out of a crimped double pile.
5.2.2 The layout of the test specimen used for compression tests shall be in accordance with Figure 1
— for single, double or triple crimped points.
5.2.3 The following aspects shall be taken into account in order to avoid excessive eccentricities:
— the distance between the upper and lower plates as shown in Figure 1 — shall not vary more
than 0,5 mm;
— the deviation of the perpendicularity between the test specimen and the plate shall not exceed 2 %
in each of two mutually perpendicular directions (measured as 1 % of b, see Figure 2);
— the tolerance on squareness of specimen ends shall be less than 1,0 mm, see also EN 10248-2;
— the specimen shall be placed in the centre of the plates.
Key
A crimped points
B end plates
C specimen taken from double pile
D, E interlock welded to specimen
F applied force
Figure 1 — Specimen for compression test of triple crimps
Key
A test specimen
B end plates
b width of the end plate
Figure 2 — Tolerances for perpendicularity
5.3 Testing and evaluation
The tests shall be carried out as a displacement controlled test with a maximum displacement rate of
20 mm/min.
The load applied by the testing machine and the displacement of the cross-head shall be measured
continuously to obtain the load-displacement curve for the specimen and to determine the two items
given in 5.1.2.
The measured value R for one specimen is the maximum force measured in the test for a
ult,i
displacement ≤ 10 mm, divided by the number of crimped points, see Figure 3.
It shall be verified in the load-displacement curve that the stiffness of the crimped point of at least
15 kN/mm for a displacement up to 5 mm has been reached, see also EN 1993-5. If several tests have
been carried out, this verification may also be carried out based on statistical evaluation, see also
EN 1990.
NOTE The verification for one specimen can be carried out according to the following procedure, see Figure 3:
— linearization of the curve (A);
— drawing the line corresponding to the required minimum stiffness (B);
— the verification is fulfilled if the linearized curve is on the left hand or on the minimum stiffness line.
Regarding the number of tests to be carried out and the evaluation of the test results in order to obtain
the characteristic value R reference shall be made to EN 1990.
k
Key
F measured force
d measured displacement of the cross-head
A linearization of load displacement curve
B minimum required stiffness line
Figure 3 — Resistance from load-displacement curve of triple crimps
6 Test of the interlock resistance of straight web sheet piles
6.1 General
6.1.1 In the following, provisions are given for determining the characteristic interlock resistance R
k,s
of straight web sheet piles by testing.
6.1.2 The characteristic interlock resistance shall be related to a specific nominal interlock geometry
and, if required, to a specific steel grade in accordance with 6.1.3.
6.1.3 If variation of the steel grade has a substantial influence (more than 10 %) on the test result, it
shall be taken into account when evaluating the tests and the results shall then be given in relation to the
steel grade.
6.1.4 The determination of the mechanical properties of the steel used for the specimen in these tests
shall be carried out according to EN ISO 6892-1.
6.2 Test specimen
The test specimen shall be cut from the pile perpendicular to the rolling direction as shown in Figure 4.
The width w of the specimen shall be 100 mm.
Key
A, B, C, D specimen cut from the sheet pile
w width of the specimen
Figure 4 — Specimen for testing the characteristic interlock resistance R
k,s
6.3 Testing and evaluation
Two specimens from the same sheet pile shall be tested; each sample tests the interlocks from the edge
of the sheet pile (A1 – B1 and C2 – D2 as shown in Figure 4).
In the tensile testing machine, the test specimen shall be set so that the tensile forces F are applied parallel
to the axis of the specimen as shown in Figure 5.
Care shall be taken to avoid any misalignment of the test specimen.
The distance L between the grips shall satisfy: 350 mm ≤ L ≤ 500 mm
Key
A, B samples
F tensile force applied by the testing machine
L distance between grips
Figure 5 — Test set-up
The tensile test shall be carried out as a displacement controlled test, with a maximum displacement rate
of 5 mm/min.
The measured value R in kN/m of a specimen shall be taken as the highest tensile force F measured in
ult,i
this test, divided by its width w.
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