【作者】 王燕增；

【导师】 张东明；

【作者基本信息】 重庆大学 ， 安全技术及工程， 2010， 硕士

【摘要】 边坡是人类进行生活和工程活动的最基本的地质环境之一,一旦形成滑坡或发生崩塌,将对人类的生命、财产安全造成严重威胁。因此,做好滑坡的防灾减灾工作是边坡工程研究的主要目标。如何及时明确滑坡的稳定性及潜在滑动面,对于滑坡失稳的预防和整治起到至关重要的作用,是边坡工程研究的主要内容。本文对瓦池滑坡的稳定性和防治技术进行探讨,主要研究内容如下:(1)根据现场勘察的滑坡变形特征,分析滑坡影响因素、形成机制,明确滑坡变形模式,并对滑坡稳定性进行定性分析。(2)采用传递系数法计算瓦池滑坡在自然和暴雨两种工况下的滑坡推力和安全系数。计算结果表明:瓦池2号滑坡在自然工况下基本稳定,在暴雨工况下不稳定;瓦池1号滑坡在两种工况下均不稳定,且剩余下滑力主要集中在1号滑坡,判定瓦池滑坡属于牵引式滑坡,与现场勘察情况基本相符。(3)运用有限元软件ANSYS并结合强度折减法对瓦池滑坡进行数值模拟,取不同的强度折减系数,对比水平位移等值线图和塑性应变等值线图,确定滑坡体安全系数及临界滑动面,并对边坡稳定性进行分析。(4)根据滑坡的形态、结构特征以及形成机制,考虑两种工况下的稳定性,滑坡失稳后的危害性以及保护对象在滑坡上的分布,提出防治措施。建议建立预防体系,并采用生物措施和工程措施相结合的方案对滑坡进行综合治理。更多还原

【Abstract】 Slop is one of the most basic geological environment in our life and engineering activities, it will do harm to people’s life and property security if it collapses. Therefore the main aim in the slop research is to eliminate or reduce the denger it induces. How to figure out the stability and potential sliding surface of the slop will play a key role during prevention for instability and is the principal content of our research.The main contents of this article include the following items:First base on the feature of the site, analyse the influencial factors, work out the transforming model, and made a qualitative analysis for the stability of the slop.Secondly,under the case of nature and rainstorm, calculate the safety coefficient and slop thrust with transfer coefficient method.The result shows: No.2 slop is stable under natural case and instable under rainstorm case, No.1 slop is not stable in both cases. The remaining strength focus mainly on No.1 slop. Then get a conclusion that wachi slop is a retrogressive landslides.Thirdly, Use the finite element software ANSYS to carry out numerical simulation. With different strength reduction factor, compare the horizontal displacement isoline map and plastic strain isoline map, figure out the safety coefficient and critical silding surface of the slop.Finally, considering the difference of the shape, structural feature, forming mechanism and stability, harmness in different condition, put forward some preventive measure, such as establishing preventive system, adopting comprehensive procedure comprising of engineering method and biological method.更多还原