Design Parameter Analysis and Displacement Prediction of Deep Foundation Pit Engineering based on Indoor Experiments
In order to calculate the horizontal displacement of the station enclosure structure based on parameter estimation method,a deep foundation pit project of a subway station in Nanjing was taken as the research object.The effective internal friction angle and static soil pressure coefficient of the soil layer were solved using analytical calculation method,and compared with indoor test results;Compare the measured deformation values of the foundation pit obtained through on-site monitoring with the horizontal displacement of the station enclosure structure obtained based on analytical calculations.The results indicate that the results calculated based on Mayne and Campanella have high estimation accuracy and can be applied to calculate the effective internal friction angle of sandy soils in the Nanjing area;The calculation accuracy of the static lateral pressure coefficient of Hossain formula is higher than that of Baldi formula,with a prediction error within±20%.Indoor experiments underestimated the static lateral pressure coefficient of soil layers;The horizontal displacement of the underground continuous wall solved based on the static penetration parameters of pore pressure and the lateral expansion parameters of the flat shovel is close to the measured values,and the absolute ratio range of the measured values to the calculated values is 0.90-1.54.
万方数据
维普
