Safety Monitoring and Analysis of Deep Foundation Pit Engineering of Large Pumping Station in Weak Strata
Combined with a large pumping station project in Shaoxing,this paper monitors the construction period of a large deep foundation pit in soft ground,analyzes the surface deformation and deep horizontal displacement of the envelope pile,explores its deformation rule,carries out safety analysis,and compares and summarizes the deformation characteristics of soft soil deep foundation pit.The results show that the deformation of the envelope structure is closely related to the excavation depth,and the deformation develops rapidly during the excavation,and the change rate reaches the peak after the excavation to the design elevation.During the stage from floor pouring to structure construction,the deformation rate of each monitoring item decreases first and then converges.The influence of pumping station construction on the surrounding environment is mainly distributed during the excavation of foundation pit.The horizontal displacement of the envelope structure under the weak formation is smaller than that of the general formation,but the vertical settlement deformation is larger.The foundation treatment is needed to control the settlement of the project where the foundation pit is in soft soil such as silt soil.
weak stratadeep foundation pit engineeringconstruction period monitoringsurface deformationsecurity analysis
万方数据
维普
