Ground anchors are prestressed anchor systems for transmitting tensile forces into the load-bearing ground, e.g. for anchoring shoring systems or slope stabilisation. Ground anchors consist of tendons that are grouted into the surrounding ground over the fixed anchor length, i.e. the length over which tensile forces are transmitted, and anchor heads that transmit the tensile forces of the tendons to the structure.

Regulatory framework

The corresponding specifications of DIN EN 1537 in conjunction with DIN SPEC 18537 do not contain conclusive technical rules for the permanent use of ground anchors (permanent anchors).

DIBt grants general construction technique permits (aBG) for permanent back-tying of structures by means of ground anchors (construction technique) and national technical approvals (abZ) for the ground anchor systems used as permanent anchors. European Technical Assessments (ETAs) can also be issued for the anchor systems.

National technical approvals and general construction technique permits can be granted together in a single decision ('combined decision').

The executing company must submit a declaration of conformity stating that the tie backs executed with the ground anchors comply with the provisions of the relevant construction technique permit.

The temporary use of ground anchors (< 2 years) does not require a regulatory verification of fitness for use or application. Unless additional design values for the anchor heads are needed for the structural analysis, there is no need for a verification of fitness for use or application.

Please also refer to the applicable Technical Building Rules, cf. MVV TB Part A 1.