Recognition method of rocky slope instability mode

Abstract

The invention provides a recognition method of a rocky slope instability mode. The process is concise, the efficiency is high, and the result is accurate and reliable. The recognition method comprisesthe steps of 1, building a geological generalized model of a rocky slope; 2, building a finite element model of the rocky slope in finite element software, wherein the steps of building a rocky slopegeometric model, allocating material attributes of a rock body and a flappy structural surface, dividing a grid, applying a constraint and a load and setting a solution are completed in the finite element software; 3, analyzing the modal of the finite element model of the rocky slope to obtain a low order mode of the rocky slope; 4, analyzing the slope motion mode corresponding to the modal shapeof the rocky slope of each order; 5, determining the potential instability mode of the rocky slope, wherein according to characteristics of the instability of the rocky slope in combination with theslope motion mode corresponding to the modal shape of the rocky mode of each order, determining the instability mode, which is possibly formed by laminating the modal shapes of all the orders and recognizing the potential instability mode of the slope and the modal shape which contributes most to the instability of the slope.

Description

technical field [0001] The invention belongs to the field of rock slope engineering, and in particular relates to a method for identifying rock slope instability modes applicable to water conservancy and hydropower, mines, roads and other projects. technical background [0002] With the implementation of my country's western development strategy, a number of infrastructure such as roads, railways, and large (giant) hydropower projects have started construction one after another. The stability of the bank slope is poor, so it is inevitable to excavate the high and steep rock slope. The identification of slope instability mode is the basis of slope stability analysis, evaluation and prediction, and also the premise of strengthening and controlling slope deformation and instability rock mass. Therefore, to study the stability and safety control measures of high rocky slopes, it is first necessary to analyze and identify the instability mode of the slope. [0003] There are man...

AI Technical Summary

Problems solved by technology

The kinematic analysis method uses the stereopolar projection diagram as an analysis tool, which can only determine the geometric possibility of slope instability, but cannot determine its mechanical feasibility; this method can only identify simple basic instability modes, and cannot identify the sliding and compound instability mode

The model test method can identify the basic and compound instability modes of rock slopes, but making physical models of rock slopes requires special equipment and complicated experimental techniques. limitations

With the rapid development of computer technology, the numerical simulation method is widely used. This method can identify complex instability modes of rock slopes, but there are simplifications in the modeling process and randomness in the calculation results.

[0004] The above three traditional methods have played an important role in identifying the instability mode of rock slopes, but all three methods have certain shortcomings, and cannot simultaneously meet the requirements of simple process, high efficiency, low cost, and accurate and reliable identification results. This situation has affected the study of rock slope failure model

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