基于GIS的边坡三维极限平衡模型研究

自然界中发生的滑坡绝大多数呈三维形态,边坡稳定性分析应从三维的角度进行处理。在实际边坡工程作业中,科学地计算边坡受到边界条件约束、荷载作用、土体性质在空间上变异等实际形态的影响,同样需要进行三维稳定性分析。目前边坡稳定性分析仍以二维极限平衡法为主。当滑动面已经确定时,使用三维分析可以恰当地考虑滑坡的三维形态对安全系数的影响,同时可以避免二维分析时如何选择代表性横截面,计算结果是否合理等问题。

Research on Three-dimensional Limit Equilibrium Model of Slope Based on GIS

The occurrence of landslides in the nature is mostly presented to be the three-dimensional form and slope stability analysis is processed from the three dimensional perspective. In the actual slope engineering, scientific computing slope is affected by boundary condition, loading, and the properties of soil in the space variation of practical form, which also need the three-dimensional stability analysis. The slope stability analysis is given priority to with two-dimensional limit equilibrium method. When the sliding surface has been determined, using a three-dimensional analysis can properly consider the three-dimensional landslide form the impact on the safety factor,and can avoid the problems how to choose a representative cross section as the two-dimensional analysis is carried on, and whether the calculation result is reasonable or not.