Study on depth mechanical mechanism of the sliding surface of the landslide under the influence conditions of rainfall
The law of landslide has always been a hot spot in the field of geological disaster landslide,aiming at the problem of unclear distribution of the sliding surface of the landslide,the depth of the sliding surface in landslide theory was taken as the research object.A theoretical calculation model for the depth of sliding surface in saturated soil layers on slopes was established.According to the equi-librium mechanics method,on the basis of the sliding surface control function,the depth analytical solution of the sliding layer satisfying the model boundary condition was derived and verified,and a numerical analysis model was established to study the relationship between moisture content and shear strength through numerical analysis.Based on the above research,a feasibility study scheme for landslide on-site monitoring test was proposed based on the background of multiple landslide monitoring projects in Liupanshui City.The landslide variation law of landslide body was studied through field tests.The variation law of landslide in different rainfall environments was ana-lyzed in detail,and it was found that the cumulative value of rainfall reaching the critical value would cause landslides,and it was found that the possibility of landslides in landslides caused by continuous rainfall increased,and the correlation between moisture content and soil shear resistance.The relationship between sliding layer depth,friction angle and cohesion force was discussed,and it was shown that the saturated soil layers causing sliding were deeper at the foot of the slope and gradually became shallower to the upper part of the slope.
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