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上海城市高速建设进程中,地铁的建设规模居全国第一,已建地铁周边的深基坑项目层出不穷。在深基坑的开挖过程中,坑内降水必不可少,但这会影响地铁隧道周围土层的含水量,从而扰动地铁周边土层,对轨道交通运行安全产生巨大隐患。因此需要在项目建设之初,就要对地铁隧道结构的变形进行监测,关注深基坑施工过程中降水情况等因素,采取回灌井等必要措施,以确保地铁结构安全,使得城市轨交建设稳步发展。本文谨以上海前滩地区项目为例,浅谈回灌井的理论及应用。
In the process of high-speed urban construction in Shanghai, the construction scale of the MTRC ranks first in China and the deep foundation pit projects around the MTR have been built one after another. During the excavation of deep foundation pit, precipitation in the pit is essential, but this will affect the water content around the soil around the subway tunnel, thus disturbing the soil around the subway, which has a huge hidden danger to the safety of the railway traffic. Therefore, it is necessary to monitor the deformation of the subway tunnel structure at the beginning of the project construction, pay attention to the precipitation during the deep foundation pit construction and other factors, and take necessary measures such as the recharge well to ensure the safety of the subway structure so that the urban rail transit construction Steady development. This article would like to Shanghai Qiantan project as an example, talk about the theory and application of recharge well.