Analysis on deformation characteristics of rainfallstrata in deep foundation pit in Xi'an area
Taking the descending water project of deep foundation pit under typical loess stratum conditions in Xi'an area as the research object,the monitoring data of rainfall deformation of each foundation pit were collected,and the empirical coef-ficient of rainfall deformation engineering in Xi'an area was analyzed according to four categories of formation sand-bearing layer,building type,precipitation depth and regional location,combined with stratified sum-sum method.The analysis re-sults show that:The sedimentation experience coefficient is 0.1～0.23 for the precipitation depth less than 5m,0.01～0.12 for the precipitation depth greater than 5 m,and the larger sedimentation experience coefficient should be used for the calcula-tion of the surrounding settlement of the foundation pit with the precipitation depth less than 5m.The empirical coefficient of sand-bearing formation settlement is relatively discrete,so it is suggested to pay more attention to it in practical engineering.The settlement experience coefficient of subway project is 0.02～0.07,the recommended value is 0.1,and the settlement ex-perience coefficient of civil construction project is 0.01～0.23,the recommended value is 0.25.
NETL
NSTL
万方数据
