北京地铁奥运支线北辰桥区辐射井降水施工技术

北京地铁奥运支线是北京市轨道交通线网中的8号线中的一部分，起点为熊猫环岛站，终点设在规划森林公园站南门。下穿北京四环路北辰桥U形槽结构，是奥运支线重要的风险控制点，暗挖法施工，工程的安全性极为重要。由于北辰桥区地面交通极为复杂，无法采用常规的管井降水工艺，需采用辐射井对其进行整体降水。介绍了该工程辐射井降水施工方案设计、施工技术要求及其降水效果。

Construction Technology of Radial Well Dewatering in Bejing Metro Olympic Branch

Beijing metro Olympic branch is a part of Beijing rail transit network Line 8, the starting point is Xiongmaohuandao and the terminal station is designed at the south gate of planned Forest Park. The U - shape groove structure undercrossing Beichen Bridge is an important risk control point with subsurface excavation method, the engineering safety is extremely important. The ground traffic in Beichen Bridge area is very complicated, traditional tube well dewatering could not be applied and overall dewatering was made by radial wells. The paper introduced the radial well dewatering about the construction design, construction technology requirement and the dewatering effect.