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以立冲沟滑坡为研究对象,建立了考虑-v不等式的基于变形分析的有限元滑坡稳定性分析方法。该方法基于破损区确定滑动模式,基于安全系数和变形量两个指标进行稳定性评价,评价体系更全面和合理。定义安全程度为破损段除以所有潜在滑动区域的百分数,这个指标更接近工程实际,更直观;也有利于确定加固的位置和加固措施的选择。设计了自然坡形、削坡坡形及两个可能水位的组合计算工况,经过对其破损面积、变形量、安全程度等的对比分析发现:上部削坡减载后,破损区面积和变形的最大值均减小,说明滑坡的稳定状态得到了较大的改善,削坡措施合理;水位2相对于水位1,变形最大值和破损区均要高,说明水位2更不利于滑坡稳定,要采取措施进行疏排处理,避免该水位的出现。
Taking Liqinkou landslide as the research object, a finite element landslide stability analysis method based on deformation analysis considering -v inequality is established. The method determines the sliding mode based on the damaged area and evaluates the stability based on the two indexes of safety factor and deformation. The evaluation system is more comprehensive and reasonable. Defining the degree of safety as the percentage of damaged segments divided by the total potential slip area is closer to engineering practice and more intuitive; it also helps to determine the location of reinforcements and the choice of reinforcement measures. The combination of natural slope shape, slope shape reduction and two possible water levels is designed. After comparative analysis of the damaged area, deformation and safety, it is found that the area and deformation of the damaged area The maximum value of both decreases, indicating that the landslide has been greatly improved the stability of the state, cutting measures are reasonable; water level 2 relative to the water level 1, the maximum deformation and damage zone are high, indicating that water level 2 is more detrimental to the stability of the landslide, Measures should be taken to carry out drainage treatment to avoid the emergence of the water level.