Advanced Construction Techniques Ltd. (ACT) services

Rock and Soil Anchors are structural members that are used to provide temporary or permanent structural support.  A rock or soil anchor consists of a tendon and an anchorage. The tendon can be one or more solid steel bars, a single hollow bar, or a bundle of high strength tensile steel strands. After drilling, installation and grouting, the anchors are tested to ensure that they are capable of carrying the design loads. Both performance and proof tests are performed in accordance with PTI prior to locking the anchors off at the required load. In some instances, anchors are installed but not stressed and remain passive.

Soil Nails are steel reinforcing members that are typically installed in a closely spaced grid pattern, fully grouted, passive (non-tensioned) anchors that when covered with shotcrete, create a cohesive mass with improved shear strength to prevent slope failure. Soil nails are generally used where prestressing is either not possible or desired. They are advantageous when the slope being treated is vegetated with mature growth that can, by conscientious design and installation considerations, be preserved intact. Soil Nail Walls are constructed in stages/lifts using the top down method. Stages are excavated, followed by installation of the soil nails and shotcrete to support the stage. Successive stages are created by repeating this process until the desired bottom elevation is reached.