Study On Settlement Control Of Buildings Around Deep Foundation Pit

By using the finite element method and PLAXIS 2D finite element software,the model of the main body of deep foundation pit and its adjacent buildings in Xingong Station of Beijing Metro Line 19 is established,the whole process of deep foundation pit excavation is simulated and the schemes are compared,the main body of foundation pit and adjacent buildings are monitored in real time and the monitoring results are analyzed.The simulation results and monitoring results are compared,and the differences between them are summarized,and the factors and rules affecting the deformation of buildings are obtained.The results show that the maximum ground settlement around the foundation pit is in the middle of the building and the foundation pit;the maximum horizontal displacement of the retaining pile is 2/5H above the bottom of the foundation pit;the horizontal displacement of the foundation pit and the building is larger than the vertical displacement;the error of simulation and real-time monitoring results is about 5%;the optimum depth of the retaining structure is 30 m;and the optimum anchorage is 30 m.The number of cables is five,and measures such as increasing the depth of enclosure and the number of anchor cables can effectively reduce the deformation of buildings.Figure28;Table15;Reference 40.