Described the mechanism of soil nailing process in composite foundation

The mechanism of soil nailing process in composite foundation can be summarized as the following:

(1) Coupling beam frame.

This effect is made by the stiffness and strength of soil nail and its space distribution in the soil body.It has the restriction effect of soil deformation in the soil nailing process, and composite soil as a whole.

(2) The mechanism of share.

In the composite soil, soil nail and soil body share the external load and gravity stress of soil.During the soil nailing process,due to soil nail has higher tensile, shear strength as well as the bending stiffness which the soil body can't compared, so when the soil into the plastic state, the stress gradually transfers to the soil nails .When soil cracking, the effect of soil nailing share is more outstanding.

(3) The stress transmission and diffusion effect in the soil nailing process.

Under the same loads, the strain levels of soil nail reinforcement in the body less than the strain level of plain soil slope body , and delayed crack formation and development in the soil nailing process.

(4) The deformation of slope constraint.

Concrete panels integrated with soil nail reinforced which set on the surface of the slope reinforced become an organic whole is play an important part of effective role in the soil nailing process.