旋挖钻配合人工分步开挖抗滑桩施工工艺数值分析

Numerical Analysis on Construction Technology of Anti-slide Pile with Rotary Drilling and Manual Step-by-Step Excavation

为研究旋挖钻配合人工分步开挖抗滑桩桩孔的施工过程,结合临沧临翔至清水河高速公路滑坡工程,对开挖过程中桩孔地表、桩底土体及开挖完成后护壁的位移进行了研究分析。结果表明:在开挖过程中,地表面随着距桩孔位移的增大,先沉降后鼓起,孔底土层向上隆起,呈“反扣锅底”形。

In order to study the construction process of anti-slide pile hole excavated by rotary drilling combined with artificial step by step,combined with the landslide project of Linxiang to Qingshuihe expressway in Lincang,the displacement of the surface of the pile hole,the soil at the bottom of the pile and the retaining wall after ex⁃cavation were studied and analyzed.The study results show that in the process of excavation,the displacement of the ground surface increases with the distance of the pile hole increasing,and settlement firstly,then the soil lay⁃er at the bottom of the bore up uplift that shows"button the bottom of the pot shape".