Soil nails are used for stabilizing slopes and excavations. They find an efficient application in granular soils of medium to high density with sufficient internal friction, so that a good load transfer along the soil nail is possible, and only slight creep movements occur in the supported soil mass. The soil nails are installed as the excavation progresses from top to bottom. The surface of the cut is usually stabilized by shotcrete and rebar mats.
Since the soil nails are loaded only by ground movement, a certain outward deflection of the top of the stabilized wall must be expected.
The theoretical pivot of the wall is at the bottom of the excavation. Calculations assume the maximum tensile force in the earth mass to occur at a distance from the wall equal to 1/3 to 1/2 of the wall height. There, parallel to the wall, the interface between the unstable
soil and the retaining stable ground must be assumed. This location is also the area of the highest bending for the soil nails. The anchoring length of the soil nails must extend into stable ground.
Sinorock soil nail is an effective mean of anchoring. It can be used to advanced support and radial support of railways, slope reinforcement, roadbed reinforcement and regulation project of tunnel disaster.Because of the excellent thickness seamless steel tube, the convenient and rapid thread forming process on surface and the perfect fittings, self drilling anchor bar can make the unify of drilling grouting and anchoring come true.
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