Dewatering Techniques and Risk Control for Deep Foundation Pits in Alternating Clay and Silt Layers
The complex soil structure and groundwater conditions in the Yangtze River Delta region pose significant challenges to dewatering in foundation pit engineering.Using the Shanghai Caobao Road Expressway project as a case,a scientific dewatering and anti-inrush pressure reduction scheme was developed to address issues such as alternating clay and silt layers and high dewatering difficulty.The scheme optimizes measures including placing dewatering wells near supports,continuous dewatering during excavation,and staged dewatering control.A three-dimensional numerical model was established to simulate groundwater flow during pit excavation and dewatering.Results indicate that the scheme effectively reduces groundwater levels across regions,meeting engineering dewatering requirements and providing a scientific basis and practical reference for similar projects.
deep foundation pitdewateringanti-inrush pressure reductionalternating clay and silt layersrisk control
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维普
