超深地下连续墙施工

Construction of super deep diaphragm wall

超深地下连续墙在地铁、隧道等地下工程中得到越来越多的应用,其对垂直度、防水性能、稳定性等要求都较高,因此,施工难度较大。本文对其施工技术难点、施工方法以及新材料新工艺的应用进行了讨论。详细阐述了成槽垂直度的控制和工程中常采取的改善槽壁稳定性和接头处止水性能的措施,并分析了GFRP筋、TRD工法、TRUST工法、CRM工法优点及适用性。此外,对超深地下连续墙墙身质量的检验尚存在的不足提出了建议。

Super deep diaphragm wall is being used widely in subways,tunnels and such underground projects.It requires highly in perpendicularity,waterproof capability,stability,etc.So this brings about lots of difficulties in construction.Construction problems are introduced and discussed,including technology difficulties,methods,and the use of new material as well as new techniques.The control of trench perpendicularity is illustrated in detail,and the main measure is to choose proper construction machine and technology.The measures of improving the stability of slurry trench and the performance of joint waterproof are introduced.Besides,GFRP bar,TRD method,TRUST method and CRM method are introduced,and their outstanding advantages and applicability are given.In addition,suggestions are given about the deficiency in checking the quality of walls.