无降水条件下CRD暗挖工程洞内轻型井点止水措施的应用  

APPLICATION OF WATER-STOP MEASURES FOR LIGHT WELLS IN CRD UNDERGROUND EXCAVATION ENGINEERING TUNNELS UNDER CONDITIONS OF NO PRECIPITATION

作　　者：周天豪 吴昊 ZHOU Tian-hao;WU Hao(Beijing Construction Engineering Group Co.,Ltd.,100055,Beijing,China)

机构地区：[1]北京建工集团有限责任公司,北京100055

出　　处：《建筑技术》2021年第8期973-975,共3页Architecture Technology

摘　　要：北京地铁17号线盾构接收井横通道开挖施工中,发现下层导洞含水量大,虽采用全断面注浆残余水仍难以控制。对此将小型潜水泵接入轻型井点作为暗挖隧道止水措施,经计算根据隧道的最大涌水量确定了轻型井的各项参数;采用倾斜成孔等施工工艺,取得了良好的止水效果。During excavation of cross passage of shield receiving shaft of Beijing Metro Line 17, it was found that the lower pilot tunnel has a large water content, and the residual water is still difficult to control despite the use of full-section grouting. For the above, a small submersible pump is connected to a light well point as a water-stop measure for the underground excavation tunnel. After calculation, various parameters of the light well are determined according to maximum water inflow of the tunnel;and construction techniques such as inclined hole formation have been used to achieve good water-stopping effect.

关 键 词：轻型井点 隧道工程 止水效果 

分 类 号：TU74[建筑科学—建筑技术科学]