【摘要】 根据位于福建沿海软土地区的某大型船坞基坑工程的设计与施工过程,利用PLAXIS 3D有限元软件建立相似度较高的三维模型,采用其中的HS-Small模型模拟土体,分析了不同施工步骤现行方案下基坑整体与支护结构的变形及受力特性,并且对影响基坑整体与支护结构的变形及受力特性的各因素进行分析,为了达到最好的效果,这些研究都是很有必要的。通过数值模拟计算结果明确其变化趋势,最后参考工程造价角度得出有效结论,给出合理的建议。根据计算结果可知,关于此船坞基坑的方案设计存在着可进一步优化的空间。为本船坞以及类似基坑工程的设计与施工提供有益参考。更多还原

【Abstract】 In the schematic design and the construction process of a large-scale dockyards deep excavation which is located at the coast of Fujian Province,the finite element numerical model was developed to analyze the deformation and mechanical performance of the deep foundation pit and the supporting structure under different construction conditions. To bring positive effects on deformation control and overall stability of the excavation,it is necessary to investigate the behavior of deep excavation in soft clay ground. The factors which influence the deformation and mechanical performance of the deep excavation and the supporting structure are analyzed using finite element software Plaxis 3D,with the simulation of soil by HS- Small model. The results show that a better schematic design of the deep excavation exists. Finally,valid advice was proposed based on the results.更多还原