法国规范体系下重力罩面在滑塌边坡中的应用

Application of Gravity Overlay in Sliding Slope Based on France Standard

重力罩面是将滑塌体全部清除,按照设计坡率回填碎石或砂砾等透水性材料,并充分压实,利用回填材料的重力和透水功能保持边坡体稳定。以阿尔及利亚东西高速公路PK23+170—PK23+230段边坡滑塌为实例,通过对边坡滑塌失稳原因和潜在破坏模式的分析,选取重力罩面方案对滑塌边坡进行处治,利用法国规范体系下的Talren软件,采用Bishop和Perturbations算法,计算了边坡在不同工况下的稳定性,论证了该方案的可行性。

The gravity overlay needs to clear all sliding soil,backfill the permeability materials such as gravel or sand according to the design of slope rate,which is fully compacted,the function of backfill material gravity and waterproof keeps the slope stability. Based on slope collapse in PK23 ＋ 170—PK23 ＋ 230 section of Algeria East-west highway,this paper analyzes the cause of sliding slope and potential failure mode,then selects the gravity overlay to treat sliding slope. Using Talren software based on France standard,Bishop and Perturbations algorithms are adopted to calculate the slope stability under different conditions,this scheme is proved to be feasible.