【作者】 于广云；

【导师】 周国庆；

【作者基本信息】 中国矿业大学 ， 岩土工程， 2009， 博士

【摘要】 本文以淮南矿区工程地质条件和采矿条件为研究背景,采用数值模拟、理论分析、实验室试验与工程应用相结合的研究方法,深入系统地研究了采动区垂直大变形对原状土体物理、力学性质的影响规律,并将其应用于采动区地基加固理论与技术中。进行了采动区大变形扰动土垂直移动变形数值模拟试验,得出了采动后土体垂直移动变形曲线分布特性及其与采矿条件的相互关系;从理论上深入研究了采动后土体垂直移动变形的曲线特性与土体物理力学特性的关系,首次提出了采动扰动率概念,并建立了采动扰动率与土体物理力学特性参数之间的关系方程;进行了现场采动扰动土体实际取样和实验室试验,验证了理论研究结果的正确性;最后针对工程实际,提出了采动区抗变形桥梁采动扰动地基加固理论和采动扰动地基加固设计计算方法。更多还原

【Abstract】 The study background of this thesis is the engineering and mining conditions of Huainan mining area, China. Several study methods, such as numerical simulation, theoretical study, experiments in situ and in lab, were adopted in this thesis. The influence of Vertical deformation in subsidence area due to underground mining on soil physical and mechanical properties and its engineering applications are studied deeply and systematically. By numerical simulation on vertical movement and deformation of soil disturbed by underground mining in subsidence area, vertical movement and deformation curve of soil after disturbance relative relations with mining conditions are obtained. With theoretical analysis, vertical deformation curve of soil after disturbance relative relations with soil physical and mechanical properties relations were studied deeply. Conception of disturbance rate was presented firstly. Relation equations of disturbance rate and soil physical and mechanical properties were established. These theoretical results were verified by experiments with natural and disturbed soil samples. In the last part of this thesis, ground improvement theory and design calculation methods of bridge subgrade in subsidence area were presented on background of a real project. Several useful results were obtained.更多还原