【作者】 邓念东；

【导师】 樊怀仁；

【作者基本信息】 西安科技学院 ， 地质工程， 2002， 硕士

【摘要】 本文在分析水泥土的力学性质以及水泥土桩复合地基形成过程、同时考虑时间效应的基础上，分析了桩间土体的强度及变形；并应用流变力学理论建立了一种能同时反映土体固结、次固结的流变模型；推导出了相应的有限元公式，给出了计算分析方法，该方法不仅避免了繁琐的数学运算，而且从概念上认识更直观；基于基础、水泥土桩复合地基以及下卧层在竖向的变形协调条件和静力平衡条件，建立了水泥土桩复合地基变形与稳定性评价分析方法，利用该方法可对桩体复合地基的设计方案进行合理地评价优选；最后应用ANSYS程序，结合工程实例，对导出的公式和所建立的模型及软件进行了工程验算，证明导出的公式和所建立的模型及软件合理、切实可行。由此总结出的一些规律可以指导工程实践。更多还原

【Abstract】 Based on the mechanic properties of the cement-soil and the forming process of the composite foundation of cement- soils pile, in this paper, the strength and deformation of the inter-piles soil bodies, considering the time effect are firstly analyzed. Secondly, a rheological model, which reflects both consolidation and secondary consolidation settlement is suggested; Thirdly, the format of Finite Element Method and the calculation analysis methods are proposed, using the theory of rheological mechanics. All of those can not only prevents from those complicated mathematical calculation, but also make its concept clearer; Fourthly, according to the coordinating condition of vertical deformation and the static balance condition of the foundation, the cement-soil composite foundation, the bottom layer, the analysis method for the deformation and stability of composite basement is established. By making use of the method, it is possible to reasonably evaluate the designed case of cement-soil composite pile foundation. Finally, on the base of ANSYS program, the deduced formula and numerical program for rheological analysis of cement - soils composite foundation is checked, taking the example of the engineering project. Some useful regulations are concluded from the data gotten from the project and can be used to instruct later construction.更多还原