基于传递系数法确定滑坡治理削坡减载的工程应用

Engineering Application of Landslide Control Determination with Cutting Slope&Reducing Load Based on Transfer Coefficient Method

工程实践中削坡减载方案一般采用不平衡推力法计算滑坡条块的下滑力和剩余下滑力,依据剪出口剩余下滑力<或=0这一条件来搜索最优的削坡规模及位置。为解决滑坡发展不同阶段受力状态的差异性,削破减载方案设计中应对滑坡失稳破坏模式有正确的认识。鉴于此,该文以某一具体工程实例,在滑坡渐进破坏模式分析基础上运用整体和局部稳定系数法进行了探究。结果表明:以滑坡破坏模式为基础进行削坡减载得到的削载方量是经济的,且削坡部位是可靠的,达到了预期稳定效果。

In the practice of engineering,the imbalance thrust force method is normally used in the project of cutting slope&reducing load to calculate the down-sliding force and the residual sliding force of the block of slopes.However,the optimal scales and sites of cutting slopes are sought based on the criteria of the residual sliding force of shear opening<or=0.To figure out the difference of landslide’s stress state during the different stages of development,the failure model of landslide should be given a clear understanding in the project of cutting slope&reducing load.In view of this,the paper,according to a specific project case,probed into the application of global and local stability coefficient on the basis of the analysis of progressive failure model of landslide.Based on the failure mode of landslide,the results showed that the reducing load volume,which received by cutting slope&reducing load,is economic.As well as the part of cutting slope is dependable,and achieved expected stabilization.