Design and Practice of Confined Water Control of 45m-level Deep Foundation Excavation in Multiple Aquifer Area
The development of deep underground space has become the inevitable trend of urban development in Shanghai area.Therefore,the ultra-deep excavation project gradually emerge.As a typical coastal geomorphic area,Shanghai has complex multi-layer aquifers,including micro-confined aquifers and confined aquifers I,II and III.Some of the interconnected super-thick confined aquifers have a thickness of more than 50m.Therefore,the ultra-deep excavation project will face a series of complex confined water control problems.Take a scientific installation project as the background project,which is the deepest non-circular 45m-level excavation in Shanghai.Based on field pumping test,the inversion analysis of aquifer hydrogeological features is carried out.In order to meet the requirements of pressure reduction in the excavation and environmental impact control outside the excavation,the compartmental-reduction-irrigation groundwater control method and the double curtain system are put forward.The control effect of confined water test and formal dewatering project is well.
deep foundation excavationaquiferconfined waterprecipitationwaterproofing curtaininversion analysisdesign
NETL
NSTL
万方数据
维普
