摘要
地铁区间建设过程中,处理地下水是一大难题。暗挖隧道开挖时遇富水粉细砂地层,采用管井降水或全断面深孔注浆等措施虽可解决大范围的地下水,但在侧壁和仰拱处仍存在残留水。结合地铁暗挖区间开挖过程中洞内真空降水疏干地下水的实际应用,叙述真空降水的工作原理、性能参数、施工技术和优缺点,提出地铁区间粉细砂地层开挖过程中疏干残留水的措施。
Groundwater treatment is a big problem in subway interval construction. Covered tunnel excavation encountered rich-water powder fine sand stratum. Although tube well dewatering or full-face deep-hole grouting could solve groundwater problem at a large scale, there was still residual water at side wall and arch. Based on practical application of vacuum groundwater drainage in covered subway interval excavation, this paper introduced the working principle of dewatering, performance parameters, construction technique, advantages and disadvantages, and proposed measures for residual water drainage during subway interval powder fine sand stratum excavation.
出处
《建筑技术》
北大核心
2017年第6期603-605,共3页
Architecture Technology
关键词
残留水
真空降水
真空泵
residual water
vacuum dewatering
vacuum pump
