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Soil Nails / Rock Bolts

The technique of soil nailing began to evolve in the early 1970's. Major research programs in Germany in the mid to late 70's and in France in the late 80's advanced this method of construction. It has been successfully utilized worldwide for excavation support and slope stabilization and its use continues to grow rapidly.

Applying the principles of systematic rock anchoring to soil seems to be obvious, but the requirements for soil nailing are higher. The many years of experience gained with pressure-grouted anchors have resulted in a certain level of standards; however, the stability of the supported soil mass must be verified for all stages.Soil nails are used for stabilizing slopes and excavations. The soil nails are installed as the excavation progresses from top to bottom. The surface of the cut is usually stabilized by shotcrete and rebars mats. The anchoring length of the soil nails must extend into stable ground.