【摘要】 超前桩墙在软弱土基坑土钉支护中的应用 ,扩展了土钉支护技术的适用范围 ,但国内外对其作用机理的研究甚少。本文通过工程实例的边坡水平位移量测和平面有限元分析 ,对超前桩墙在软弱土基坑土钉支护中所起的作用进行了探讨 ,通过超前桩墙的预支挡解决了分层开挖时软弱土边坡的临时自稳问题 ,并有效地控制了软弱土边坡的坡顶位移和坡面变形破坏。本文的结论可供软弱土基坑复合土钉支护优化设计时参考更多还原

【Abstract】 The application of leading pile wall to the foundation pit of soft soil braced by soil nails expands the application range of soil nail bracing technique.The effect of leading pile wall on soil nail reinforcement is discussed based on the horizontal displacement of certain slope and the two dimension finite element analysis.The temporary self stabilization for the foundation pit with soft soil is resolved by the pre retaining of leading pile wall,which efficiently controls the top displacement of the slope and the failure of soft soil layer.更多还原