管线下地下连续墙一幅三序二笼成槽施工技术

为解决地下连续墙穿越地下管线的成槽施工问题,研究采用重新调整穿管地连墙幅宽的方式,形成一幅地连墙分3个顺序抓土成槽,槽底岩层采用冲孔桩机以管线为界分两段冲击破碎;针对钢筋笼做特殊改造,形成“鱼头笼”“鱼尾笼”两种形式,入槽嵌入对接完成一幅地连墙钢筋笼安装施工,避免了开挖后可能存在的基坑支护渗漏安全隐患,减少解决问题成本,降低处理问题难度。

Construction Technology of A Three-sequence Two-cage Trough of Underground Diaphragm Wall Under Pipeline

In order to solve the grooving construction of underground continuous wall passing through underground pipeline, the method of readjusting the width of the ground connecting wall passing through the pipeline is studied to form a ground connecting wall, grab the soil and form a groove in three sequences, and the rock stratum at the bottom of the groove is broken by punching pile machine in two sections bounded by the pipeline. Special transformation is made for the reinforcement cage to form two forms of "fish head cage" and "fish tail cage". The installation and construction of reinforcement cage of a diaphragm wall is completed by inserting and butting into the groove, which could avoids the potential safety hazard of foundation pit support leakage after excavation, reduce the cost of problem solving and reduces the difficulty of problem handling.