Construction Method of Slope Failure Mode Controlled by Thin and Weak Interlayer

Abstract

The invention relates to a construction method for a side slope failure mode controlled by a thin and weak interlayer, and belongs to the technical field of stability analysis and evaluation for sideslopes. The construction method disclosed by the invention comprises the following steps: determining a slide-out point and a slide-in point on the basis of an orthogonal test design; then determiningthe upper limits and the lower limits of the vertical coordinates of the failure mode according to the slope surface line of a side slope, and a bed rock line; amplifying the thickness of the weak interlayer by several times on this basis; dynamically adjusting the upper limits and the lower limits of the vertical coordinates of the failure mode; and finally mapping the generated vertical coordinates to a failure mode in the case of a real thickness of the weak interlayer to finally obtain the side slope failure mode controlled by the weak interlayer. According to the construction method disclosed by the invention, the obtained side slope failure mode is good in matching with the weak interlayer, and automatic construction for the side slope failure mode can be better realized, so that stability analysis is accurately carried out on the side slope in advance; and government and reinforcement are carried out on the side slope with low stability, so that the occurrence of landslide hazards is avoided.

Description

technical field [0001] The invention relates to a slope failure mode construction method controlled by thin and weak interlayers, and belongs to the technical field of slope stability analysis and evaluation. Background technique [0002] Landslides are one of the common geological disasters in my country. For example, at about 10:40 am on August 28, 2017, a landslide occurred in Zhangjiawan Town, Nayong County, Bijie City, Guizhou Province. As of 9:00 on August 31, the statistics, The landslide disaster has caused more than 500 people to be affected, 27 people died, 8 people were missing, 8 people were injured, 575 people were urgently relocated, more than 250 houses collapsed, and the direct economic loss was more than 84 million yuan. In addition, different degrees of landslide disasters have occurred in Kaili, Tongren and other mountains in Guizhou. In order to effectively avoid the adverse effects of disasters, the stability analysis of slopes was carried out in advance,...

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Problems solved by technology

[0003] Although the current slope stability evaluation methods have become mature, the limit equilibrium method based on different conditional force assumptions, the strength reduction method based on different instability criteria and the finite element method can be combined to analyze and evaluate slope stability. , but for slopes controlled by thin and weak interlayers, no reasonable and feasible failure mode has been established. Therefore, there is an urgent need for a method for constructing failure modes of slopes controlled by thin and weak interlayers

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