滑(边)坡稳定性计算分析中的滑坡推力计算方法

滑坡推力计算一直是边坡稳定性分析、防护加固设计及滑坡治理抗滑工程设计中的核心问题。根据抗滑支挡工程结构与被加固滑坡体的力学关系,滑坡推力计算方法可概括为分离法、虚力法及结构与岩土数值耦合法。不同的计算方法得到的滑坡推力值有差异。用以上3种方法对拟设桩结构物的内力进行计算,对比分析发现,分离法及虚力法最终均需对桩侧滑坡推力分布形式进行假定,假定分布形式不同所得内力不同;数值耦合法可直接得到桩侧应力分布形式,且考虑了桩与岩土的偶合效应,计算结果较为合理,有必要进一步分析研究与推广应用。

The calculation methods of landslide thrust in slope stability analysising

The landslide thrust calculating has being a key problem of stability analysis of slope,reinforcement,design and control of landslide for a long time. According to the mechanics relation of anti-slide and retaining structure to the reinforced landslide,The classification to calculation methods of landslide thrust may be described as separation method,nominal method,and the coupled method.The landslide thrust calculated by different methods is different from each other.Using these methods to calculate the internal force of the pile,the result of comparative analysis shows that the distribution of landslide thrust on anti-slide pile need to be assumed when use the separation method and nominal method to calculate the landslide thrust,the different distribution result in different internal force.The coupled method can get the landslide thrust without assuming the distribution,with the consideratiion of the coupling effect between pile and soil or rock.using the coupled method to calculate the landslide thrust can get reasonable result,it can be widely used in engineering practice.