昆明圆砾地层深基坑强降水技术研究

以昆明轨道交通首期工程十四标北辰小区站为例,根据工程地质与水文地质条件,结合降水试验及现场实际情况对原设计车站南区的坑底水平封堵措施进行优化,采用"封堵墙+强降水"措施来实施。详细叙述了降水试验过程及最终降水方案的确定,通过对周围环境的监测表明降水措施对周边影响满足要求。结果表明,通过优化节省了工期,创造了良好的社会与经济效益。

Research on Strong Dewatering Technology for Deep Foundation Excavation in Kunming Round Gravel Stratum

During the construction of the Beichen station of Kunming subway,phase 1 project,the horizontal sealing of the bottom of the foundation in the south area was optimized considering site conditions and with the result from dewatering tests.A combination of sealing wall and strong dewatering was finally adopted.This paper described the test and the decision-making in the selection of the final scheme.The condition of the project was monitored for a period of time.The result shows that the dewatering measures meet the standard requirement.This dewatering process is proved efficient and time saving in project such as Kunming subway station.