Anchors

Reliable anchor solutions for securing excavations and slopes

Anchors are used to absorb tensile forces to reduce horizontal deformations and are mainly used for temporary and permanent excavation and slope stabilisation as bar or strand anchors. They are also used as uplift and structural anchors and to a lesser extent as deadman's anchors.

Implementation

A steel or GRP tension member is installed in a borehole created by a cased or uncased borehole and initial grouting is carried out with anchor cement. A cement body is created in the grouting section by post-grouting. After hardening, the anchor head is installed and the anchor is tensioned.

Examinations

Load cells
Measurement of the force curve within the holding distance
During the prestressing process, acceptance tests or, in some cases, extended acceptance tests are carried out on each anchor

Applications

Back anchoring of any excavation support systems
Temporary and permanent rock and slope stabilisation
Securing structures under high tensile loads (cable car stations, antennas, masts, bridges, etc.)
Uplift anchors

Technical data

Strand anchor	2 to 12 strands (250 to 2000 kN working load)
Bar anchors	28 to 63 mm (250 to 1500 kN working load)
Drill diameter	108 to 219 mm (standard 139.7 mm)
Anchor lengths of	up to 100 m possible
Device	Crawler drilling rig 17 t