Research on Deformation Monitoring and Prediction of a Deep Foundation Pit Construction
The prediction of deformation during excavation of foundation pit is an active risk control process.Taking the foundation pit engineering of a high-rise frame shear wall structure residential building project in Yantai City as the research object,the method of on-site measurement was used to obtain the measured values of horizontal displacement and surface settlement of foundation pit support piles.Based on the combination algorithm of BPNN and NSGA-Ⅱ,the deformation of foundation pit was predicted,and the characteristics of support piles and surface deformation during excavation of foundation pit were studied.The research results indicate that there is a significant correlation between the determination coefficients of test samples and training samples for foundation pit surface settlement and horizontal displacement of support structures based on the combination algorithm of BPNN and NSGA-Ⅱ;In the excavation section,the horizontal displacement of the supporting piles shows a non-linear increasing trend,while in the embedded section,it shows a nearly linear increasing trend;With the increase of time,surface subsidence shows a rapid decline and tends to converge after 60 days;The combination algorithm of BPNN and NSGA-Ⅱ has high accuracy in predicting foundation pit deformation.
high rise buildingdeep foundation pitconstruction deformationon site monitoringdeformation prediction
万方数据
维普
