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本文提出了天然滑坡应用决定论模型的思想和有限单元法进行位移反分析的新方法。考虑的环境量主要为地下水位和江水位,效应量为钻孔倾斜仪测得的位移。为了使利用线弹性理论成为可能,从位移中挑选出以弹性为主要部分的卸荷回弹位移作为我们研究的对象。在采用直接法求出了滑坡体的等效弹性模量以后,用该弹性模量和有限元法进行了稳定性计算。等效弹性模量与试验值较一致;有限元法计算的稳定性安全系数与用沙尔玛法计算的接近。
This paper presents the idea of a natural landslide application deterministic model and a new method of finite element method for back analysis of displacement. The environmental quantities considered are mainly groundwater level and river level, and the effect amount is the displacement measured by borehole inclinometer. In order to make use of the linear elasticity theory possible, we selected the unloading rebound displacement with elasticity as the main part from the displacement as our research object. After using the direct method to calculate the equivalent elastic modulus of the landslide body, the stability calculation is carried out by using the elastic modulus and the finite element method. The equivalent elastic modulus is consistent with the experimental value. The stability safety factor calculated by the finite element method is close to that calculated by the Sharm method.