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根据基坑土体抗力与支护结构位移之间的非线性共同作用,建立了支护结构非线性土抗力模型。考虑由于开挖造成土弹簧刚度的软化,提出了模拟基坑开挖过程的支护结构分析方法;编制出非线性共同作用弹性地基反力法的计算程序,并分析了一个实际基坑工程中各工况支护结构的受力与变形特征。工程算例表明,该分析方法计算的支护结构位移接近实测结果,且计算参数的确定更为方便。
According to the non-linear interaction between the resistance of foundation soil and the displacement of supporting structure, the nonlinear soil resistance model of supporting structure is established. Considering the softening of soil spring stiffness caused by excavation, a method of supporting structure analysis is proposed to simulate the excavation process of foundation pit. A calculation program of nonlinear reaction force method of elastic foundation is developed, and a practical foundation pit engineering Stress and Deformation Features of Supporting Structure in Various Conditions. The engineering example shows that the displacement of the support structure calculated by the analytical method is close to the measured result, and the calculation parameters are more convenient to be determined.