钢筋笼附膜地下连续墙工艺施工关键技术

由于受地下连续墙工艺限制,在基坑开挖过程中,易出现墙面渗水、接缝漏水等现象。一旦发生渗漏,堵漏服务将显著提高施工成本。为避免地下连续墙后期堵漏,节约成本,提出了钢筋笼附膜地下连续墙技术并基于杭政储出围护结构项目,对防渗膜材料性能、钢筋笼附膜工艺开展了试验研究。开挖结果显示,试验区地下连续墙开挖侧墙面与接缝处无渗漏现象发生研究结果表明,钢筋笼附膜地下连续墙工艺在具有可行性,且满足地下连续墙墙面截渗、接头止水要求,是围护结构防渗施工新的有效选择。

Key Construction Technology of Underground Diaphragm Wall of Steel Cage Attached Membrane

Due to the limitation of underground diaphragm wall process, water seepage from the wall surface and leakage from the joints are easy to occur during the excavation of the foundation pit. Once the leakage occurs, the plugging service will significantly increase the construction cost. In order to avoid late plugging of underground diaphragm wall and save cost, the steel cage attached membrane underground diaphragm wall technology is proposed and based on the Hangzheng storage out enclosure structure project, experimental research on the performance of impermeable membrane material and steel cage attached membrane process is carried out. The excavation results show that there is no leakage at the wall surface and joints on the excavated side of the diaphragm wall in the test area. The results of the study show that the steel cage attached membrane diaphragm wall technology is feasible and meets the requirements of diaphragm wall interception and joint water stop, which is a new and effective choice for the construction of containment structure.