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.
作者
周天豪
吴昊
ZHOU Tian-hao;WU Hao(Beijing Construction Engineering Group Co.,Ltd.,100055,Beijing,China)
出处
《建筑技术》
2021年第8期973-975,共3页
Architecture Technology
关键词
轻型井点
隧道工程
止水效果
light well point
tunnel engineering
water stop effect
