It is commonly believed that with the introduction of soil nails to slopes, this new combination of elements possesses higher shear strength than the original soils. In the context of Rankine’s active state, soil nailing serves to provide horizontal restraint to guard against active failure.
Moreover, when the soils inside the zone of failure are improved, block failure based on
Coulomb is still feasible. By installation of soil nails, it helps to defer the original failure planes of slopes to a greater depth inside the slope, which it is normally of high stability condition with less ingress of surface rainwater.
The characteristics of the soil nailing supporting 1)the advantages (1) soil nailing construction adjacent built around the venueSoil nailing wall construction USES a small
bench excavation step by step, less disturbance of soil on slope;Soil nailing construction speed faster, the interference of stress in soil before released in full.Soil nailing and grouting, combined closely with the surface of the body, make the soil nail body easily under small deformation will bring into play the function of soil nail reinforcement. (2) soil nailing construction has a simple and flexibleDuring the construction of soil nail, the soil nail into holes are luoyang shovel, drill and shotcrete equipment is small, portable, small occupied area, convenient move, low noise, small vibration, construction has obvious superiority in the center of the city. (3) soil nailing system construction speed is fast
Relative to other soil nail wall support system, from the point of construction work, because of its small equipment used, and can be artificial pore forming construction, at the same time in the field can be partitioned, organization is more convenient, earthwork excavation and soil nailing construction can be crossed, construction speed is greatly accelerated, can effectively shorten the construction period. (4) soil nail wall supporting system of the engineering cost is low
Many engineering examples show that the soil nail wall supporting the project cost compared with other supporting type of engineering cost is low.This is why many engineering after numerous scheme comparison, finally choose one of the main causes of soil nail wall supporting system.