This foundation pit project is located in the flood plain area of the Yangtze River in Hexi, Nanjing, with complicated geological conditions, high underground water level, ultra-thick sand layer and rock entry. The fo...This foundation pit project is located in the flood plain area of the Yangtze River in Hexi, Nanjing, with complicated geological conditions, high underground water level, ultra-thick sand layer and rock entry. The foundation pit adopts a 50m-deep TRD underground water soil mixing wall and a 15m-deep MJS construction pile as the waterproof curtain outside the foundation pit. This paper discusses the construction technology of TRD combined with MJS waterproof curtain and the technical measures such as design optimization, equipment configuration, main process parameters, construction points, construction difficulties and treatment measures in the construction process, which largely solves the difficult problems of crossing ultra-deep fine sand layer, gravel layer and eventually entering rock, and the construction is difficult, and achieves good construction effect.展开更多
文摘This foundation pit project is located in the flood plain area of the Yangtze River in Hexi, Nanjing, with complicated geological conditions, high underground water level, ultra-thick sand layer and rock entry. The foundation pit adopts a 50m-deep TRD underground water soil mixing wall and a 15m-deep MJS construction pile as the waterproof curtain outside the foundation pit. This paper discusses the construction technology of TRD combined with MJS waterproof curtain and the technical measures such as design optimization, equipment configuration, main process parameters, construction points, construction difficulties and treatment measures in the construction process, which largely solves the difficult problems of crossing ultra-deep fine sand layer, gravel layer and eventually entering rock, and the construction is difficult, and achieves good construction effect.
