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Ground anchor GROUND ANCHORS AND NAILS

ground anchor
ground anchor
ground anchor
ground anchor
ground anchor
ground anchor
ground anchor
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Description

Ground anchors and soil nails are soil mass retaining devices constructed to transmitting an applied tensile load to a load bearing stratum. Anchors and nails are normally pre-stressed, composed of steel bars that are introduced into a small diameter pre-drilled hole of limited diameter and covered with borehole grout. Construction sequence Installation process of ground anchors: in accordance with the requirements of standard NBN EN 1537 : Ground anchors 1. & 2. Drilling of a borehole at a defined angle using an external protection (tubes / casing crown), under drilling fluid 3. At the required level of depth, replacement of the drilling fluid by a (primary) grout injected through the injection conduit which is withdrawn as the borehole is filled with grout (simultaneous drill and grout). 4. Insertion of the reinforcement (bar tendons, strand tendons,…) over a fixed bond length (anchor length) and a possible free tendon length (free anchor length), according to the design. 5. Cement grout under pressure (borehole grout) is injected as the external protection tube is progressively removed: formation of the (bond length) grout body (or ‘core’) 6. The completed ground anchor 7. Active anchor : pre-stressed to reduce structural movement. Transfer their load over a fixed length. Performance at least seven days after injection with classic grout cement. Passive anchor or nail : un-pre-stressed, cemented in the stabilized mass over their whole length thus performing solely during deformations of the soil
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.