Construction Technology of Piping Prevention and Control of Deep Foundation Excavation with Suspended Waterproof Curtain in Coastal Water-rich Soft Soil Geology
Piping disasters are prone to occurring during the excavation of deep foundation excavation in subway stations.Based on the fact that the first and second layers of confined water are not separated by the Tianjin coastal underground continuous wall,the second layer of confined water is partially connected with the first layer of confined water,and the thickness of the confined water layer is large,the causes of piping hazards during the excavation of deep foundation excavation in this project are analyzed.Some treatment measures,such as double-liquid grouting plugging,replacement of high-power submersible pumps,construction of drainage ditches and collecting wells in foundation excavation,strengthening of cushions,and addition of dewatering wells,have been adopted,which have not only effectively controlled piping hazards but also provided technical support for emergency treatment of piping hazards in similar projects.Meanwhile,some suggestions are proposed to prevent and reduce the occurrence of piping hazards in similar projects.
subways stationdeep foundation excavationconfined waterpipingwaterproof curtainconstruction
万方数据
维普
