摘要
基于传统的剩余推力法思路 ,推导了包括地表水、地下水、地震力、锚固力等外荷载综合作用下的边坡稳定性和剩余推力计算公式 ,以实例给出了剩余推力法在MicrosoftExcel中的实现方法 ,从中可以清晰看出剩余推力法的实质。比较了用同一安全系数但采用不同的折减方法所获得的剩余推力变化趋势。通过上述 4类荷载的敏感性分析 ,指出了剩余推力法应用中应注意的基本问题。运用Excel中加载宏“规划求解”工具 。
A 2 D rigid body limit equilibrium analysis, named as the Residual Thrust Method (RTM), of rock blocks with two dimensional multiple plane sliding mechanism is carried out in the present paper considering the water pressure, the earthquake load, and the reinforcement force applied on the slope. Practical spreadsheet techniques, from which the essential details enclosed in the RTM method can be seen out clearly, are set up for the deterministic slope stability analysis, based on the RTM method. The factor of safety and the residual thrust are solved automatically which never requires special computer programs. Sensitivity analyses for the directions of applied earthquake force, for water pressure, and for anchor bolt angle are presented. Some valuable results from the sensitivity analyses, which can be used as a guide for the reinforcement of such slope as a whole, are found. A search for the deterministic critical slip surface is automatically realized that accompanied by the simply conception, ease of implementation routine using SOLVER optimization tool existed in Microsoft Excel spreadsheet software. The legible formula and the practical flexibility of the presented method in realization are stressed for site or field engineers.
出处
《中国地质灾害与防治学报》
CSCD
2001年第3期70-78,共1页
The Chinese Journal of Geological Hazard and Control
