A Calculation Method for Prediction of Landslide Deformation

Abstract

The invention discloses a landslide deformation prediction computing method. The method comprises the steps that 1 a full strain stress test and a creep test are carried out, and the equal deformationafter a rock and soil body exceeds a peak point is used as a reference to establish relation between a full stress strain test curve and a creep test curve to acquire the curve of mechanical parameters of the rock and soil body, wherein the curve changes with time; 2 the tested mechanical parameters of the rock and soil body are used to acquire the curve of the landslide deformation of differentrock and soil body mechanical parameters through a finite element strength reduction method, wherein the curve changes with time; and 3 a slope finite element computing model in a stress state predicts the landslide deformation value at the parameter according to the soil body mechanical parameter at the time of landslide. The method provided by the invention has the advantages that the rock and soil full stress strain test, the creep test and the finite element strength reduction method are combined to compute and analyze the landslide deformation; the computing is accurate; only full stressstrain and creep tests are needed; establishing a new constitutive model is not needed; and the method has the characteristics of clear mechanism, small spending cycle and good economic effect.

Description

technical field [0001] The invention relates to the technical field of landslide prediction, in particular to a method for predicting and calculating landslide deformation. Background technique [0002] Landslides are one of the common geological disasters. When they occur, they cause great harm and often cause huge casualties, property losses and significant social impacts. Landslide deformation is the main basis for judging landslide state and carrying out prevention and control measures. In fact, landslide deformation is a time-sensitive process of creep deformation damage, which is divided into initial creep deformation stage, steady-state creep deformation stage, and accelerated creep deformation stage. The prediction methods for landslide deformation are usually divided into empirical model method, component model method, and viscoelastic-plastic model method. [0003] Empirical model methods mainly include power relationship, logarithmic relationship, fraction-linear...

AI Technical Summary

Problems solved by technology

In general, the calculation accuracy of the viscoelastic-plastic model method is poor, and the finite element simulation calculation is used, which costs less

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