钢筋笼附膜地下连续墙工艺施工关键技术

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

摘要:

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。

关键词:钢筋笼附膜;试验研究;墙面截渗;接头止水

Abstract:

In order to avoid the late plugging of underground diaphragm wall and save cost, the underground diaphragm wall technology of steel cage attached membrane is proposed. Based on the enclosure structure project of Hangzhou Government Reserves, the experimental research on the performance of impermeable membrane material and the technology of steel cage attached membrane 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 underground diaphragm wall technology of steel cage attached membrane is feasible and meets the requirements of seepage interception and joint water stop of underground diaphragm wall, which is an effective choice for the seepage-proofing construction of enclosure structure.

Key words:steel cage attached membrane; experimental research; seepage interception of wall surface; joint water stop