论文部分内容阅读
首先采用软土本构模型——各向异性三屈服面流变模型,编制了基坑有限元程序,研究了基坑开挖过程中无周边留土和有周边留土情况下围护结构的水平位移、土体的位移(包括墙后土体的侧向位移、地表沉降和地表隆起)、支撑力随开挖过程的发展变化规律,探讨了基坑工程中的流变效应及其对围护结构位移和支撑力的影响。同时应用实例对新模型及有限元程序进行了验证,其计算值和实测值吻合。
Firstly, by using the soft soil constitutive model-anisotropic three yield surface rheological model, the finite element program of foundation pit was prepared, and the influence of retaining structure without surrounding soil and retaining soil around the excavation process was studied Horizontal displacement, soil displacement (including lateral displacement of the soil behind the wall, surface subsidence and surface uplift), the supporting force with the development and variation of excavation process, the study of the foundation pit engineering rheological effects and its surrounding Impact of retaining structure displacement and supporting force. At the same time, the new model and the finite element program are validated by the practical examples. The calculated values coincide with the measured values.