A method for determining the most dangerous sliding surface of a push type landslide and the optimal pile position of an anti-slide pile

Abstract

The invention relates to a method for determining an optimal dangerous sliding surface of a push-type landslide and an optimal pile position of an anti-slide pile, and belongs to the technical field of landslide stability evaluation and prevention. The method comprises the following steps: 1, carrying out pretreatment; performing exploration and determination of basic physical and mechanical parameters of the push type landslide slope body; determining a pushing type landslide slope body, strip block downward sliding force and residual downward sliding force, determining a landslide active sliding area, an extrusion area and a stable area, determining a most dangerous sliding surface formed by a pushing type landslide shear-off opening, determining critical residual downward sliding thrustof a landslide local damage position and determining an optimal landslide anti-sliding pile position. The method has the beneficial effects that according to the ultimate balance condition of the landslide slope body, the striping-is adopted; Sequentially a most dangerous sliding surface formed by the landslide shear-off opening, a landslide local damage shear-off opening mechanical criterion anda compensation residual sliding thrust value of the anti-slide pile are determined by using a residual sliding force analysis method; The optimal anti-slide pile position for push type landslide treatment is determined, and the purpose of scientific and effective treatment of the landslide is achieved.

Description

technical field [0001] The invention relates to a method for determining the most dangerous sliding surface of a push-type landslide and the optimal pile position of an anti-slide pile, which belongs to the technical field of landslide stability evaluation and prevention. Background technique [0002] In recent years, with the rise of various engineering constructions, landslide disasters are often encountered in water conservancy and hydropower projects, coastal engineering, traffic engineering, and railway engineering, often causing serious harm to national economic construction, people's lives, and the safety of major projects. Huge property damage. The landslide disaster threatens the safety of human life, and has caused serious impact and harm to the normal society and production operation. Among the many geological disasters of landslides, push landslides are one of the main types of landslides, which are widely distributed in our country. The landslides of push land...

AI Technical Summary

Problems solved by technology

However, due to the traditional limit equilibrium method, the analysis and evaluation of the overall stability of the push-type slope is used as the basis for the design of anti-slide piles. Complexity and variability, especially as the depth of the sliding landslide increases, its instability scale, slip form, and sliding surface formation characteristics are different, and the instability form is often no longer a unified overall decline, but usually Local damage and landslides are formed in the weakest part of the slope (slope compression area), and the traditional slope limit equilibrium method cannot scientifically and effectively evaluate the slope stability and anti-slide pile positions that cause local damage and slippage. evaluation and positioning; the finite element numerical analysis method to evaluate slope stability and determine the spatial location of anti-slide piles is based on the condition that the reasonable constitutive relationship and the accurate physical and mechanical parameters of the soil layer are clearly known. However, due to sampling and Due to the limitation of test conditions, it is difficult to obtain accurate physical and mechanical parameters of rock and soil, and it is difficult to truly reflect the stability of landslide slopes. The results are easily affected by the above factors, finite element software and human factors, resulting in large errors. Due to the limitations of cumbersome process, large amount of calculation and long calculation time, the displacement obtained by the method cannot represent the real displacement change of the landslide, and the spatial position of the anti-slide pile reinforcement of the landslide slope cannot be effectively determined.

Images