By its definition anchors are used to provide preloading of the structural systems by applying a lock-in tension load in the anchor threaded rebar or tendon such as strands/cables.  The rebar or tendon is bonded to competent rock or soil by a cement-based grout. The pre-applied load in tendon whilst strengthening the wall it also reduce movement of wall.

 

Based on Zeox experienced, to attain the maximum effectiveness of anchor, the depth of anchors shall be kept to a maximum depth of 50m. The carry working loads of anchors can reach 200 tons. When the application of the anchor is for permanent use, the tendon or rebar are protected with anticorrosion systems. In both temporary and permanent retaining applications, both rock and soil anchors have proven to be a viable and cost-effective solution to conventional cantilever retaining walls provided it is designed and constructed in accordance with proper code of practice. Loop type anchor (i.e. that can be withdraw/remove) is used when the anchoring works is meant for temporary usage.

 

One important factor that is to be considered during the grouting exercise is to ensure the pressure being applied in the substrate is not causing any uplift or heaving. The most suitable type of soils where this method is found to be effective is fine-grained soil with sufficient permeability that allows excess water to flow and dissipate. Depending on the type of soil, the effective radius of an injection hole also varies