水平定向钻进铺管水平孔段软土孔壁稳定性分析

Analysis of Hole Wall Stability in Horizontal Directional Drilling in Soft Soils Area

通过对水平钻孔孔壁弹塑性力学分析 ,分析了水平钻孔软土段孔壁在土压力与泥浆压力的作用下受力状态 ,提出了最优泥浆压力的概念 ,给定向钻进铺管技术的施工可靠性提供了一定的理论依据。

By analyzing elastic?plastic state of horizont al soft soils hole wall,the stress state of the horizontal soft soils hole wall und er the earth pressure and the lama pressure are both analyzed,and the conception of th e best lama pressure is pointed out.This study can supply the reference in practice of horizontal directional drilling.