【作者】 吴震宇；

【导师】 陈建康；

【作者基本信息】 四川大学 ， 水工结构工程， 2006， 硕士

【摘要】 为了满足高速发展的国民经济对于电力和水资源的巨大需求,我国已经和即将建设一大批大型水利水电工程。这些工程的建设都不可避免地要在各种复杂的地质环境条件下,人为地开挖、支护形成各种各样的高陡岩石边坡。这些边坡在开挖过程中以及建成后长期运行中的安全稳定性对于水利水电工程建设的成败关系重大、影响深远。因此,在我国大型水利水电工程的施工和运行过程中,必须高度重视和积极开展对于高边坡安全稳定性的分析评价和研究工作,特别是在工程竣工后的运行过程中应定期对边坡的安全稳定性进行分析和评价。另外,边坡岩土体在长期运行过程中受风化、地震、地下水作用等环境因素影响,其物理力学参数存在逐渐降低的可能,而降低程度由于受到许多不确定因素的影响,为一随机变量,鉴于岩土力学的这一个客观特征,采用工程结构可靠度和风险分析的理论和方法解决边坡稳定及风险评价问题,则显得更为科学合理。本文以南桠河姚河坝水电站厂房高边坡作为研究的工程实例,通过对边坡安全监测资料、边坡变形性态、边坡支护结构工作情况以及各种环境因素(气温、降雨)对边坡变形的作用规律和影响程度的研究分析,根据地面厂房基坑开挖过程中边坡的实测位移值,采用基于有限元数值模拟的位移反分析方法,对边坡岩体弹塑性本构模型参数进行反分析,并根据反分析参数值对边坡的点安全系数进行了复核。通过以上分析,得出了边坡目前处于稳定状态的结论。根据结构风险分析的理论和方法,针对边坡工程有限元分析特点,进行了边坡风险理论研究,包括:①应用强度折减法寻找边坡平面有限元分析中的主更多还原

【Abstract】 In order to suffice the huge demand of electric power and water resources for rapid-developing national economy, our country has constructed and will construct many large water resources and hydroelectric projects. During constructions of these projects, it can not be avoided to form various steep rock slopes by excavation and support under complex geologic environment. The stability of these slopes is very important to the success of a water resources and hydroelectric project during construction and operation. So during construction and operation of large water resources and hydroelectric projects, stability analysis and evaluation of steep slopes must be attached much importance. In addition, rock and soil of slope will be affected by various weathering and earthquake force, so the physical and mechanical attributes of rock and soil might be debasing gradually. By reason of numbers of uncertain factors, the extent of debasement is a random variable. For this case, a reasonable conclusion can be gained for stability analysis and evaluation of slope unless using the theories and methods of engineering structure reliability and risk analysis.This paper takes the powerhouse slope of Nanya river Yaoheba hydroelectric station as an engineering example, slope monitoring data, deformation state, support working state of the slope and the rules of environmental factors (air temperature更多还原