Abstract
Abstract. In order to analyze land subsidence caused by the dewatering of a deep foundation pit in Shanghai, numerical analysis, field testing, automatic monitoring and other technologies are applied to research land subsidence control technologies, covering the whole process during the design, construction and operation of foundation pit dewatering systems. The key technologies are applied to a typical metro station foundation pit in Shanghai, such as the integrated design of foundation pit dewatering and a waterproof curtain, information control, groundwater artificial recharge, etc. The measured data of groundwater level, pore water pressure and land subsidence show a good effect on land subsidence prevention and control.
Highlights
Land subsidence is the most important geological disaster in Shanghai
The underground space development represented by deep foundation pit engineering is usually located in the centre of city
Recharge is the most direct way to control the drawdown of groundwater level caused by foundation pit dewatering, and this method should have the advantages of low cost, a short construction period, simple equipment and easy control of environmental pollution (Mohammad, 2007)
Summary
Land subsidence is the most important geological disaster in Shanghai. In recent years, the demand for urban space has increased progressively with the urban development. The underground space development represented by deep foundation pit engineering is usually located in the centre of city. The influence range of land subsidence caused by the dewatering of deep foundation pits in the horizontal direction can exceed 10 times the depth of the foundation pit excavation. The dewatering of deep foundation pits has become an important factor leading to land subsidence (Liu, 2004). With the continuous progress of urban construction, the scale and depth of foundation pits are increasing, and the control requirements of construction on the surrounding environment are becoming more stringent. Based on the practical application of a deep foundation pit in a metro station in Shanghai, the land subsidence controls covering the whole life cycle of deep foundation pit dewatering are researched to reduce its impact on the surrounding environment (Wu et al, 2005)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
