【作者】 方庆军；

【导师】 米海珍；

【作者基本信息】 兰州理工大学 ， 岩土工程， 2008， 硕士

【摘要】 边坡问题在道路工程、建筑工程、水电工程及其它岩土工程中最为常见,目前计算方法不少,但问题并未彻底解决。因此,研究边坡的稳定性,对如何预防滑坡的发生,具有重要的工程意义。随着计算机技术的发展,边坡稳定数值分析方法已经较为成熟,然而如何判别边坡工程是否达到临界破坏状态,仍然是一个比较棘手的研究问题。本文基于滑坡变形破坏规律的研究,提出了边坡破坏的判据,验证了重度增加法分析边坡稳定的可行性与可靠性,这些工作能为边坡工程设计和施工提供参考依据。具体的研究工作如下:1.采用经典算例验证重度增加法分析边坡稳定的可行性与可靠性。2.探讨了有限元计算中边坡破坏的判别标准。3.分析了坡顶受均布荷载作用下,运用重度增加法计算边坡稳定性安全系数的可行性和可靠性。4.分析了二级边坡情况下运用重度增加法计算边坡稳定性安全系数的可行性和可靠性。5.分析了影响计算精度的各种因素,绘制了各种影响因子与稳定性安全系数之间的关系曲线图。并给出了粘聚力、内摩擦角与稳定性安全系数之间的关系的量化表达式。更多还原

【Abstract】 Slope problems are most commonly found in road engineering, architecture engineering, hydropower engineering and other geotechnical engineerings. At present, there are many methods of slope analysis, but the problem remains unsolved. Researches on slope stability have great significance to the prevention of slope slide in practical projects.With the development of computer, numerical analysis method of slope stability is mature, but how to determine whether the slope project is in a critical damaging state is still an issue to be studied. Basing on the study of Landslide deformation and damage rule, this paper puts forward the judging basis of slope stability, verifies the feasibility and reliability of using gravity increase method to analyze the slope stability. All these can provide references for the design and construction of slope projects.Specific research works are as follows:(1) Verify the feasibility and reliability of slope stability analysis by applying gravity increase method to some classic examples.(2) Discuss the destructive criterions of slope in Finite element calculation.(3) Analyze the feasibility and reliability of slope stability analysis by applying gravity increase method on condition that the top of slope suffers the load which is in average distribution(4) Analyze the feasibility and reliability of slope stability analysis by applying gravity increase method on condition that the slope has two sloping surfaces.(5) Analyzing various factors which affect the accuracy of slope stability calculation and drawing some curves of the relationship between the result of slope analysis and a variety of influential factors. And work out fitting function of relationship between cohesion force and stability safety factor. Work out fitting function of relationship between internal friction angle and stability safety factor.更多还原