四川古蔺县竹林沟滑坡稳定性与场地可利用评价

发布时间：2018-02-26 08:25

本文关键词： 滑坡稳定性场地评价　出处：《成都理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：竹林沟滑坡是典型的土质滑坡;该滑坡目前整体稳定,在暴雨工况下局部失稳。坡体上民房数量较多,受滑坡变形影响部分民房墙体开裂、局部倾斜、失稳甚至倒塌;给当地村民造成了巨大的经济损失。国内外对处于这一阶段的滑坡变形破坏力学机制模式的形成条件与演化过程研究比较成熟。然而对稳定斜坡向滑坡转换过程中所造成的建筑物破坏因素及预防措施研究很少。本文以四川古蔺县竹林沟滑坡为研究对象,以滑坡稳定性与场地可利用评价为主题。通过现场勘查、调查走访,结合室内实验,用数值模拟和极限平衡法法对竹林沟滑坡进行计算分析;根据计算结果提出相应的的预防治理措施。本文的主要研究成果如下:(1)分析了诱发滑坡产生的内外因素,并对其变形破坏机制进行了深入分析。(2)通过极限平衡法对滑坡的稳定性进行计算分析。利用Geo-studio软件模拟了由降雨入渗引起滑坡初期滑动时的应力应变和滑坡稳定性系数的变化;同时也计算了现阶段滑坡的稳定性。(3)深入分析了滑坡体上地表裂缝和建筑物破坏之间的相互关系。计算分析了建筑物地基在多种裂缝时的稳定性;并提出了相应的预防措施。(4)通过采取相应的预防措施后。根据稳定性计算结果,查阅相关的规范,对竹林沟滑坡的建设场地可利用性进行了评价,竹林沟滑坡建设场地为二级场地(中等复杂场地),建设场地对建筑抗震为不利地段,场地类别为II类。该建设场地上适宜修建丙类建筑。
[Abstract]:The Zhulingou landslide is a typical soil landslide, which is stable at present, and is unstable locally under the condition of heavy rain. The number of houses on the slope is large, some of the walls are cracked, partial tilt, instability and even collapse are affected by the deformation of the landslide. The research on the formation conditions and evolution process of the landslide deformability mechanism model at this stage is more mature. However, the transformation process from stable slope to landslide is relatively mature. There are few studies on the factors of building damage and prevention measures. This paper takes the Zhulingou landslide in Gulin County, Sichuan Province, as the object of study. Taking the stability of landslide and the evaluation of site availability as the theme, the paper calculates and analyzes the Zhulingou landslide by numerical simulation and limit equilibrium method, through site investigation, investigation and visit, combined with indoor experiments. According to the results of the calculation, the corresponding preventive measures are put forward. The main research results of this paper are as follows: (1) the internal and external factors causing the landslide are analyzed. The mechanism of deformation and failure is analyzed deeply. The stability of landslide is calculated and analyzed by limit equilibrium method. The variation of stress strain and landslide stability coefficient during the initial sliding induced by rainfall infiltration is simulated by Geo-studio software. At the same time, the stability of the landslide at present is calculated.) the relationship between the surface crack and the failure of the building on the landslide body is analyzed deeply, and the stability of the building foundation under the condition of multiple cracks is calculated and analyzed. And put forward the corresponding preventive measures. 4) after taking the corresponding preventive measures, according to the stability calculation results, referring to the relevant norms, the availability of the construction site of the Zhulingou landslide is evaluated. The construction site of Zhulingou landslide is a second grade site (middle complex site), the construction site is unfavorable to the earthquake resistance of the building, and the site category is type II. The construction site is suitable for the construction of Class C building.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.22

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