EN 12794:2005

SLOVENSKI STANDARD
01-junij-2005
Montažni betonski izdelki – Piloti za temeljenje
Precast concrete products - Foundation piles
Betonfertigteile - Gründungspfähle
Produits préfabriqués en béton - Pieux de fondation
Ta slovenski standard je istoveten z: EN 12794:2005
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 12794
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2005
ICS 91.100.30; 93.020
English version
Precast concrete products - Foundation piles
Produits préfabriqués en béton - Pieux de fondation Betonfertigteile - Gründungspfähle
This European Standard was approved by CEN on 22 November 2004.
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. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12794:2005: E
worldwide for CEN national Members.

Contents
Page
Foreword.3
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 Requirements.9
5 Test methods.15
6 Evaluation of conformity.16
7 Marking .17
8 Technical documentation .17
Annex A (normative) Type test method for the verification of robustness and rigidity of pile
joints .18
Annex B (normative) Design aspects in reference with EN 1992-1-1.22
Annex C (normative)  Provisions for the design and manufacture of piles reinforced with a single
bar in reference with this document and EN 1992-1-1.26
Annex D (informative) Provisions for the design and installation of piles and pile segments
reinforced with a single bar .28
Annex E (normative) Method to measure perpendicularity of the pile top, pile bottom or pile joint
against pile axis .29
Annex Y (Informative) Choice of CE marking method.43
Bibliography .44

Foreword
This document (EN 12794:2005) has been prepared by Technical Committee CEN/TC 229 “Precast concrete
products”, the secretariat of which is held by AFNOR.
This document was examined by and agreed with a joint working party appointed by the Liaison Group
CEN/TC229-TC250, particularly for its compatibility with structural Eurocodes.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by August 2005, and conflicting national standards shall be withdrawn at
the latest by November 2006.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association and supports essential requirements of EU Construction Products
Directives (89/106/EEC).
This document is one of a series of product standards for precast concrete products.
For common aspects reference is made to EN 13369: Common rules for precast products, from which also
the relevant requirements of the EN 206-1: Concrete — Part 1: Specification, performances, production and
conformity are taken.
The references to EN 13369 by CEN/TC 229 product standards are intended to make them homogeneous
and to avoid repetitions of similar requirements.
Eurocodes are taken as a common reference for design aspects. The installation of some structural precast
concrete products is dealt with by ENV 13670-1: Execution of concrete structures — Part 1: Common rules,
which has at the moment the status of an European prestandard. In all countries it can be accompanied by
alternatives for national application and it shall not be treated as an European Standard.
The programme of Standards for structural precast concrete products comprises the following Standards, in
some cases consisting of several parts:
prEN 1168, Precast concrete products — Hollow core slabs
EN 12794, Precast concrete products - Foundation piles
EN 12843, Precast concrete products — Masts and poles
prEN 13747, Precast concrete products — Floor plates for floor systems
prEN 15037-1, Precast concrete products - Beam-and-block floor systems - Part 1: Beams
prEN 15037-2, Precast concrete products - Beam-and-block floor systems - Part 2: Blocks
EN 13224, Precast concrete products — Ribbed floor elements
EN 13225, Precast concrete products — Linear structural elements
prEN 14992, Precast concrete products — Wall elements : Products properties and performances
WI00229014, Retaining wall elements
EN 13693, Precast concrete products — Special roof elements
prEN 14844, Precast concrete products — Box culverts
prEN 13978, Precast concrete products — Precast concrete garages
prEN 14991, Precast concrete products — Foundation elements
prEN 15050, Precast concrete bridge elements
WI00229019, Precast concrete products - Silos
prEN14843, Precast concrete products — Stairs
This document defines in Annex ZA the application methods of CE marking to products designed using the
relevant EN Eurocodes (EN 1992-1-1). Where, in default of applicability conditions of EN Eurocodes to the
works of destination, design Provisions other than EN Eurocodes are used for mechanical strength, the
conditions to affix CE marking to the product are described in ZA.3.4.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
Introduction
This document specifies the requirements, the basic performance criteria and detailing provisions for precast
concrete foundation piles manufactured in a factory environment, stored, transported and ultimately installed
on a construction site. The design of structural products shall ensure their fitness for the particular application.
Particular attention is to be paid to design co-ordination with other parts of the construction.
1 Scope
This document specifies the terminology, requirements, basic performance criteria, test methods and
evaluation of conformity that will be applied to precast concrete foundation piles, factory produced for building
and civil engineering works and installed at the site by the use of impact, vibration, pressing or other suitable
techniques. This document may also be applied to products manufactured in temporary plants on site where
production is controlled in accordance with the provisions of Clause 6 and is protected against adverse
weather conditions as necessary.
This document applies to foundation piles produced in a plant as reinforced or prestressed concrete elements.
The cross-section may be solid or provided with a hollow core, either prismatic or cylindrical. The cross-
section may be constant over the full length or tapered partly or wholly along the pile or pile segment length.
This document deals with foundation piles manufactured either in one length or in segments with cast-in pile
joints. The foundation piles may have an enlarged toe or a pile shoe.
This document applies to normal weight concrete as defined in EN 206-1 compacted so as to retain no
appreciable amount of entrapped air other than entrained air.
2 Normative references
The following referenced documents are indispensable for the application 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 1992-1-1:2004, Eurocode 2: Design of concrete structures — Part 1-1: General rules and rules for
buildings
EN 1997-1:2004, Eurocode 7: Geotechnical design — Part 1: General rules
EN 13369:2004, Common rules for precast concrete products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13369:2004 and the following apply.
In general the term “product” refers to an element which is produced in large numbers.
3.1 Foundation piles
A number of these definitions are illustrated in Figure 1.
3.1.1
pile
long element to be driven in the ground to provide support to the foundation
3.1.2
single length pile
pile without joints
3.1.3
segmental pile
pile with joints
3.1.4
pile length
distance between pile top and pile bottom
3.1.5
pile segment
single unit of a jointed pile
3.1.6
segment length
length of a pile segment forming a part of the pile length
3.1.7
pile top
surface of a pile head
3.1.8
pile head
upper section of a pile
3.1.9
pile shaft
section of the pile between pile head and pile toe
3.1.10
pile toe
lower part of a pile
3.1.11
pile bottom
surface of a pile toe
3.1.12
enlarged toe
a concrete section with a cross-section greater than the pile shaft, cast in one production operation
3.1.13
shape factor
ratio between the pile length or the length of a segment and the smallest transverse dimension of the shaft
3.1.14
pile joint
a device by which separate segments of a segmental pile are structurally connected
3.1.15
pile shoe
a device by which the pile toe may be strengthened or protected
3.1.16
crack ring
a device by which the pile head or toe may be strengthened or protected
Key
1 Pile top
2 Pile length
3 Shaft length
4 Pile segment
5 Segment length
6 Pile joint
7 Pile shoe
8 Pile toe
9 Pile bottom
Figure 1 — Terms and definitions
4 Requirements
4.1 Material requirements
For general aspects, constituent materials of concrete, reinforcing and prestressing steel, inserts and
connectors the relevant Clauses of EN 13369:2004 4.1 shall apply. The ultimate tensile and tensile yield
strength of steel shall be considered.
4.2 Production requirements
4.2.1 Concrete production
4.2.1 of EN 13369:2004 shall apply.
4.2.2 Hardened concrete
4.2.2.1 Strength classes
4.2.2.1 of EN 13369:2004 shall apply.
The minimum concrete class for either reinforced or prestressed precast foundation piles shall be C35/45.
4.2.2.2 Compressive strengths
4.2.2.2 of EN 13369:2004 shall apply.
The minimum compressive strength to achieve before transportation or when applicable also before
installation of the pile shall be specified.
4.2.3 Structural reinforcement
4.2.3.1 Processing of reinforcing steel
4.2.3.1 of EN 13369:2004 shall apply.
4.2.3.2 Tensioning and prestressing
4.2.3.2.1 Initial tensioning stresses
4.2.3.2.1 of EN 13369:2004 shall apply.
4.2.3.2.2 Accuracy of tensioning
Class A of 4.2.3.2.2 of EN 13369:2004 shall apply.
4.2.3.2.3 Minimum concrete strength at transfer
4.2.3.2.3 of EN 13369:2004 shall apply.
4.2.3.2.4 Slippage of tendons
Not relevant due to the common
...