Deformation Monitoring Analysis of Super-large Deep Foundation Excavation in Kunming Soft Soil Area
Taking the deep and large foundation excavation of Kunming Comprehensive Transportation International Hub as the engineering background,the deformation characteristics,column deformation and support axial force changes of the surrounding environment of the construction foundation excavation in Kunming soft soil layer are analyzed.The deformation of each measuring point increases gradually with the increase of excavation depth,and the maximum deformation occurs at the top of the foundation excavation,and the overall deformation shape is"open".The deformation of diaphragm wall increases with the increase of excavation depth.At first,the deformation increases slowly,and then suddenly increases sharply.The vertical settlement of the column is caused by supporting and sealing the load of vehicles on the board and the yard.The maximum axial force of the support is basically matched with the distribution pattern of the maximum lateral deformation of the enclosure.The variation range of water level in each observation well is small.There is water leakage in the area near tower B on the east side of the foundation excavation,and the water level changes greatly.With the gradual excavation of the foundation excavation in the subsequent working conditions in each area,the deformation of the station gradually increases,but the deformation is small and the deformation in the interval has not changed greatly.
deep foundation excavationsupportssoft soilmonitoringdeformation
NETL
NSTL
万方数据
