Double-layer slippage side slope anti-slip retaining wall soil pressure determining method

Abstract

The invention relates to the side slope stability prevention technology, in particular to an infinite equal thickness complete water filling side slope anti-slip retaining wall soil pressure determining method. The double-layer slippage side slope anti-slip retaining wall soil pressure determining method includes the following steps: (1) determination of side slope body geometric elements; (2) determination of side slope body physical and mechanics parameters; (3) judging of whether the slope body slides along a bed rock face; (4) determination of side slope body plasticity sliding face critical depth; (5) determination of a safety coefficient FS; and (6) determination of anti-slip retaining wall soil pressure. The method is applied to a gently-inclined equal-thickness complete water filling side slope, wherein the ratio of the length to the thickness is not smaller than 5, a slope angle is not larger than 30 degrees, and anti-slip retaining wall back stands on the smooth slope body vertically. By means of the side slope geometric elements and slope body physical and mechanics parameters, the side slope body plasticity sliding face critical depth is calculated and determined, and a side slope sliding unstable type is judged. Action points, action forms and intensity of the anti-slip retaining wall soil pressure are determined according to the sliding unstable type.

Description

technical field [0001] The invention relates to the technical research field of slope stability prevention and control, in particular to a method for determining the earth pressure of an anti-sliding retaining wall of an infinite equal-thickness fully water-filled slope. Background technique [0002] Landslide is one of the important geological disasters that our country is facing, which is seriously harmful and expensive to control. There are many ways to prevent landslides, and the anti-slide retaining wall is one of the effective measures often used in slope prevention and control projects. It has the advantages of stabilizing the slope, quick results, local materials, and convenient construction. In the design of anti-sliding retaining wall, the form and magnitude of earth pressure play a crucial role. There are generally two methods to determine the earth pressure: one is the calculation method of classical earth pressure theory, that is, according to the soil conditio...

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Problems solved by technology

[0003] There is a big difference between the above-mentioned multilevel parallel slip surface and the inclined slip surface set by the traditional Coulomb earth pressure theory. Determine the real slip surface position of the slope, and because the earth pressure action form is very different from the actual earth pressure action form, the calculation result is much smaller, which eventually leads to the failure of landslide control; the disadvantage of the finite element method is that the constitutive model and The selection of its parameters is difficult to accurately determine, and the amount of calculation is large, which requires high requirements for engineering and technical personnel. There are large errors in the calculation results, and its accuracy is not easy to judge

More importantly, none of the above methods for determining earth pressure considered the influence of the residual strength of the soil in the sliding zone.

The existence of these shortcomings seriously affects the practical engineering application of the above two methods on such slopes

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