双排钻孔灌注桩挡土墙在黄土高边坡中的应用效益分析

Application Effectiveness Analysis of Double-row Gast-in-place Bored Pile Retaining Wall in High Loess Slope Project

以银西(银川—西安)高速铁路典型路堑高边坡支挡工程为例,对放坡、桩板式挡土墙和双排钻孔灌注桩挡土墙3种方案进行稳定性计算,对比分析其力学特征及综合效益。结果表明:挡土墙方案优于放坡方案;而深厚黄土地层条件下双排钻孔灌注桩挡土墙的应力分布、位移变形等力学特征,材料消耗、施工周期等经济指标明显优于桩板式挡土墙。

Taking the typical cutting high slope retaining engineering in Yinchuan-Xi’an high speed railway as an example,the stability calculation for three kinds of schemes including step-slope,pile-plate retaining wall and doublerow cast-in-place bored pile retaining wall was carried out,the mechanical characteristics and comprehensive benef its were compared and analyzed.The results show that retaining wall scheme is superior to step-slope scheme,and the mechanical characteristics such as stress distribution,displacement and deformation and the economic indicators such as material consumption and construction cycle of the double-row cast-in-place bored pile retaining wall are obvious better than that of pile-plate retaining wall.