Expansive soil slope and construction method

Abstract

The invention discloses an expansive soil slope and a construction method. The slope toe angle of the slope is increased to steepen the slope, so that the slope surface water is mainly runoff when rain falls or water flows through to reduce seepage, and the moisture content in the expansive soil of the slope is controlled to be within a lower range to prevent the loss of stability due to expansion of the expansive soil after water absorption of the slope. According to the slope and the method, the varying slope of the expansive soil slope is 45-60 degrees to quicken the surface runoff of the rainwater; the surface of the slope is covered by a clay layer with thickness of 10 cm; fiber reinforcements with length of 20-25 cm are uniformly implanted into the surface of the slope and are exposed out of the clay layer for 3-5 cm; turfs of which roots develop well in the transverse direction but develop poorly in the longitudinal direction are planted on the clay layer.

Description

technical field [0001] The invention relates to a side slope and a construction method for controlling the water content of expansive soil and reducing rainwater slope erosion to keep the side slope stable. Background technique [0002] Expansive soil is a cohesive soil composed of hydrophilic minerals, which has two characteristics of water absorption expansion and dehydration shrinkage. characteristics, the nature is extremely unstable. [0003] Expansive soils are widely distributed in our country, and it is inevitable to face the problem of expansive soil slope treatment in the process of project implementation. At present, in order to ensure the stability of expansive soil slopes, the conventional method is to reduce the slope, so that on the surface, the expansive soil slopes will not be unstable due to the gentle slope after expansion and contraction deformation. When the precipitation decreases, most of the precipitation will infiltrate downward into the slope, whi...

AI Technical Summary

Problems solved by technology

At present, in order to ensure the stability of expansive soil slopes, the conventional method is to reduce the slope, so that on the surface, the expansive soil slopes will not be unstable due to the gentle slope after expansion and contraction deformation. When the precipitation decreases, most of the precipitation will infiltrate downward into the slope, which will cause the expansive soil in the slope to absorb water and expand, and the water loss and shrinkage will increase after the rainfall stops, which will reduce the stability of the slope. If the above method is still used to Dealing with it will form a vicious circle of "instability-grading-instability"

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