Soil Nailing Wall
Soil nail design is essential for constructing a soil nailing wall. Soil nail design requires careful consideration of many parameters.
Constructing a soil nailing wall involves reinforcing the soil as work progresses in the excavated area by the introduction of passive bars, which essentially work in tension. These are usually parallel to one another and slightly inclined downward. These bars can also work partially in bending and by shear. The skin friction between the soil and the nails puts the latter in tension, and transfers acting soil forces deeper within the soil mass. Once constructed, a soil nailing wall shows a certain similarity with a reinforced earth wall. However, the fact that a soil nailing wall is been built downward with the soil being reinforced in situ, while a reinforced earth wall is constructed by building an embankment that is then strengthened as the work progresses, constitutes an essential difference between the two.
Soil nailing wall is made of natural soil by in situ soil nail wall reinforcement and combined with shot crete panels, forming a similar gravity retaining wall to resist wall earth pressure, so as to maintain the excavation face stability, the soil retaining wall is called the soil nailing wall. Mechanism of soil nailing wall and the traditional retaining structure is different, the traditional retaining structure based on passive restriction mechanism, namely the retaining structure of its own strength ans stiffness, bear the following lateral earth pressure, while the soil nailing wall is placed in the body by soil with a certain length and density of soil nail. The interaction of soil nail ans soil, formed can greatly improve the undisturbed soil strength and stiffness of composite foundation, and can significantly improve the overall stability of soil slope. The practice of soil nailing wall with reinforced tunnel reinforce the rock mass with a case study of ore is similar, therefore, also known as a case or a case retaining wall slope reinforced.
Soil nailing wall has its own unique advantages: simple structure, high bearing capacity, safe and reliable, strong applicability, low engineering cost. But also has its own shortcomings: in mud, sand, or construction difficulties, in sandy pebble soil rich in groundwater in the geological construction difficulties.