Stability calculation method for position of trailing edge slip crack surface of Xigeda stratum rock slope

Abstract

The invention discloses a stability calculation method for the position of a trailing edge slip crack surface of a Xigeda stratum rock slope, which belongs to the technical field of rock slope stability analysis. The method comprises the steps that using the Xigeda stratum rock slope as a research object; taking the slope safety factor as a target function; taking the position coordinates of the trailing edge slip crack surface as decision variables; establishing a limit balance equation of the slip mass, and simultaneously considering the yields of the bottom slip surface and the trailing edge slip crack surface to simultaneously solve the safety factor of the slope and the position coordinates of the trailing edge slip crack surface control points; and meanwhile, solving the position ofthe trailing edge slip crack surface of the slope through the nonlinear programming theory. Programming is simple, and the calculation precision is high; the whole method is rigorous in theory and simple and convenient in engineering application, can be applied to the design of the rock slope of the Xigeda stratum, and can provide a basis for the design of a slope supporting structure.

Description

technical field [0001] The invention relates to a method for calculating the stability of the position of a slip surface at the rear edge of a rock slope in Xigeda formation, and belongs to the technical field of rock slope stability analysis. Background technique [0002] The Xigeda formation is widely distributed in the Panxi area of ​​my country, and its distribution area and thickness are relatively large in the Anding River Valley and the urban area of ​​Panzhihua. The Xigeda formation belongs to the Tertiary rock formation, which can be generalized as a set of semidiagenetic rocks composed of interbedded siltstone and claystone of different colors. It is a very soft rock with poor engineering properties; the occurrence of the Xigeda formation Gentle, the inclination is less than 30 degrees. The Xigeda formation is often covered with thicker Quaternary rock and soil. [0003] At present, large-scale infrastructure construction is being carried out in the Panxi area, a...

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Problems solved by technology

The geometry of the sliding body is related to the position of the trailing edge slip surface. Therefore, the limit equilibrium problem of the sliding body is a statically indeterminate problem in terms of mechanics. The traditional slope stability calculation method cannot simultaneously calculate the trailing edge slip surface. The position of the face and the factor of safety of the slope

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