This document (EN 14490:2010) has been prepared by Technical Committee CEN/TC 288 “Execution of special geotechnical works”, the secretariat of which is held by AFNOR.

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of an identical text or by endorsement, at the latest by December 2010, and conflicting national standards shall be withdrawn at the latest by December 2010.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

The remit of CEN/TC 288 is the standardisation of the execution procedures for geotechnical works (including testing and control methods) and of the required material properties. CEN/TC 288/WG 13 has been charged with the preparation of EN 14490 in the subject area of soil nailing.

The document has been prepared to stand alongside EN 1997-1, Eurocode 7: Geotechnical design. "Design considerations" of this European Standard deals only with those matters which should be taken into account during the execution stage of soil nailing so that the design of the soil nailing system may be fulfilled. This European Standard, however, provides full coverage of the construction and supervision requirements.

This European Standard has been drafted by a working group comprising delegates from ten countries and the comments of these countries have been taken into account.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

1 Scope

1.1 This European Standard establishes general principles for the execution, testing, supervision and monitoring of soil nailing.

1.2 Soil nailing is a construction technique, used to enhance/maintain the stability of a soil mass by installation of reinforcing elements (soil nails). Typical examples of soil nailing are given in Annex A.

1.3 The scope of soil nailing applications considered in this European Standard includes the installation and testing of soil nails and associated operations, required when stabilising existing and newly cut slopes and faces in soil, existing earth retaining structures, embankments, existing tunnels and the excavated facing of new tunnels in soil.

1.4 Soil nailing may be used to form part of a hybrid construction. This European Standard is relevant only to the soil nailing aspect of such constructions.

1.5 Techniques, such as reinforcement of ground by vertical inclusions (sheet piles, bored or driven piles, or other elements) and stabilisation with rock bolts, prestressed ground anchors or tensions piles are not covered by this European Standard.

1.6 Guidance on practical aspects of soil nailing and aspects on design, durability and testing is given in informative Annexes A, B and C, respectively.

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 196-1, Methods of testing cement — Part 1: determination of strength

EN 197-1, Cement — Part 1: Composition, specifications and conformity criteria for common cements

EN 206-1, Concrete — Part 1: Specification performance, production and conformity

EN 1537, Execution of special geotechnical work — Ground anchors

EN 1992-1-1, 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 1997-2:2007, Eurocode 7 — Geotechnical design — Part 2: Ground investigation and testing

EN 10025-2, Hot rolled products of structural steels — Part 2: Technical delivery conditions for non-alloy structural steels

EN 10079, Definition of steel products

EN 10080, Steel for the reinforcement of concrete — Weldable reinforcing steel — General

EN 10138 (all parts), Prestressing steels

EN 10210 (all parts), Hot finished structural hollow sections of non-alloy and fine grain steels

EN 10219 (all parts), Cold formed welded structural hollow sections of non-alloy and fine grain steels

EN 10244 (all parts), Steel wire and wire products — Non-ferrous metallic coatings on steel wire

EN 10245 (all parts), Steel wire and wire products — Organic coatings on steel wire

EN 13251:2000, Geotextiles and geotextile-related products — Characteristics required for use in earthworks, foundations and retaining structures

EN 13670, Execution of concrete structures

EN 14487-1, Sprayed concrete — Part 1: Definitions, specifications and conformity

EN 14488 (all parts), Testing sprayed concrete

EN ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods (ISO 1461:2009)

EN 14490:2010 Execution of special geotechnical works – Soil nailing