基坑开挖中考虑不同强度参数取值的土压力计算

摘要

本文分析了深基坑开挖中的土压力计算问题。着重讨论了选取不同抗剪强度参数时对土压力计算的影响。经过实例计算分析，作者认为当采用总应力法计算土压力时，如果φu=0，则应选用不排水不固结三轴试验指标计算土压力。最后，作者强调当用总应力法计算并取直剪试验强度参数时应重视结构位移计算。%This paper, analyzed the calculation of earth pressure on deep excavation. It focuses on the influence of different shear strength on the calculation of earth pressure. The analysis, concludes that the shear strength parameters of unconsolidated-undrained triaxial test should be used in applying total stress method when φu=0. Finally it reminds that deformation of retaining structure should be calculated when applying the total stress method and using the direct shear test's strength parameters