城市排水管道建设应用拖管施工控制后续沉降的新方法  

New Method to Control Ground Settlement after Finishing the Construction of Drainage Pipe Using HDD(Horizontal Directional Drilling)

作　　者：晁东辉 

机构地区：[1]上海市城市建设设计研究总院,上海200125

出　　处：《中国市政工程》2013年第5期63-65,106,共3页China Municipal Engineering

摘　　要：在拖管施工时,为减小管道拉入所受的摩擦力,需在管子和土层间留出一定的空隙以形成泥浆套,从而减小拖管时所需的扭矩和回拉力。为了形成管子和土层之间所需的空隙,拖管施工完成之后,管壁与孔壁之间的空隙就由钻井液和黏土形成的混合泥浆所填充。由于泥浆的不稳定性,使得施工后地表沉降发生,为了减小这种后续沉降,介绍一种置换泥浆的施工方法,通过注入水泥浆液置换出空隙内的混合泥浆,进而达到固定工作管,加固地基减小沉降的作用。For reducing the force of friction,the space for mud between pipe and soil is necessary, when the construction is using HDD(Horizontal Directional Drilling).The mud in the space can reduce the torque moment and the force of dragging.After the construction of dragging pipe, the space is full of the mud mixed by the clay and drilling fluid.The instability of mud can cause the settlement of ground surface.For reducing the settlement,this paper will introduce the method to replace mixed mud with the cement slurry to fix work tube and reduce the ground surface settlement.

关 键 词：拖管 地面沉降 泥浆置换 

分 类 号：TU992.23[建筑科学—市政工程]