山区防洪透水路基结构在强降雨作用下的稳定性分析  

Stability of Permeable Flood-Prevention Subgrade Structure under Heavy Rainfal

作　　者：孟海东[1] 孙国富[1] 赵熙[1] 姜波[2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京市交通委员会路政局平谷公路分局,北京101200

出　　处：《交通标准化》2014年第17期123-128,共6页Communications Standardization

摘　　要：山区公路陡坡填方路基因其整体稳定性和透水性较差而成为特大降雨造成公路水毁的重灾对象之一。在北京"7.21"公路水毁的恢复工程中,以加筋桩板石笼挡墙形成的山区新型防洪透水路基结构被提出和应用。利用ABAQUS软件对该路基结构进行模拟,以流固耦合算法对其在不同强度降雨条件下的变形和孔压进行了分析,并利用强度折减法对其稳定性做出分析和评价。结果表明,板桩加筋石笼组合挡墙在强降雨前后都有较好的稳定性,是山区公路防洪透水路基的首选支挡结构之一。The steep embankment subgrade of mountain highway becomes one of the severely affected objects, which is damaged by heavy rainfall, because of its poor overall stability and permeability. The newstyle flood-prevention permeable subgrade structure formed by reinforced pile-plate gabion retaining wall is put forward and applied in the restoration project of Beijing 7.21 Highway Damaged by floods. The subgrade structure is simulated by ABAQUS software, then its deformation and pore pressure under different strength of rainfall are analyzed by fluid-solid coupling algorithm, and its stability is analyzed and evaluated by strength reduction method. The results show that the permeable pile-plate gabion retaining wall structure has preferable stability whether before or after the rainfall. Therefore, the reinforced pileplate gabion retaining wall is one of the preferred flood-prevention permeable retaining structures of mountain highway.

关 键 词：山区公路 桩板挡墙 石笼挡墙 强降雨 流固耦合 强度折减法 

分 类 号：U416.15[交通运输工程—道路与铁道工程]