延安市桥沟镇东十里铺村滑坡稳定性分析及其治理方案优选

发布时间：2018-11-07 15:09

【摘要】：我国地形地貌条件复杂多变,地质灾害频繁发生。随着我国经济发展的突飞猛进,促进了我国工程建设的步伐,特别是随着西部大开发的进一步深入,在黄土高原,尤其是延安地区大规模地开展基础设施建设。由于延安地区土地资源有限,特别是由于地形地貌等条件的约束,在工程建设中边坡工程频繁出现。因此,能否找到一个最优的设计方案,兼顾设计要求和节约成本,对于科研工作人员来说刻不容缓。本文以陕西省延安市桥沟镇东十里铺村滑坡工程为依托,系统地研究了滑坡体的工程地质条件、基本特征、稳定性分析及动态综合治理方案优选等问题。具体内容如下:(1)工程地质条件介绍了延安市桥沟镇东十里铺村山体滑坡的工程地质条件,为下文分析滑坡体的稳定性分析和滑坡治理方案的优选做准备。(2)滑坡的稳定性评价分析通过搜集滑坡体的相关资料、现场勘查、室内试验、分析区域地质背景条件等,并参照相关工程经验,确定滑带土的物理力学参数,分别采用定性、定量的方法评价坡体的稳定性。以MIDAS/GTS有限元强度折减法理论为依据,模拟该滑坡的稳定性,其结果与传递系数法计算的结果高度吻合。为了居民的生命财产安全,需要提高滑坡的安全储备,急需对该滑坡工程进行治理。(3)滑坡治理方案优选研究首先,以滑坡体的具体工程实际为依据,参照滑坡稳定性的评价结果,借助评价滑坡治理的三个指标:安全性、经济性、合理性,分析滑坡的预防和治理措施并提出三种治理方案。然后,利用模糊层次分析法对三种治理方案进行优选。最后,以技术、经济及对环境的影响三个指标为依据将三个方案进行对比,进一步验证层次分析法优选结果的可靠性。最终确定桥沟镇滑坡治理的最优方案为方案一:锚索抗滑桩+挡土板+平整坡面及削坡+截排水+动态监测。
[Abstract]:The topographic and geomorphological conditions in China are complex and changeable, and geological disasters occur frequently. With the rapid development of China's economy, the pace of engineering construction in China has been promoted, especially with the further development of the western region, large-scale infrastructure construction has been carried out in the Loess Plateau, especially in Yan'an area. Because of the limited land resources in Yan'an area, especially because of the constraints of topography and geomorphology, slope engineering frequently appears in the engineering construction. Therefore, it is urgent for scientific research staff to find an optimal design scheme that takes into account design requirements and cost savings. Based on the landslide project of Dongshilipu Village, Qiaogou Town, Yan'an City, Shaanxi Province, this paper systematically studies the engineering geological conditions, basic characteristics, stability analysis and optimal selection of dynamic comprehensive treatment schemes of the landslide body. The specific contents are as follows: (1) the engineering geological conditions of the landslide in Dongshilipu Village, Qiaogou Town, Yan'an City, are introduced. Preparation for the following analysis of landslide stability analysis and landslide treatment scheme. (2) landslide stability evaluation and analysis through the collection of landslide related data, on-site exploration, laboratory tests, analysis of regional geological background conditions, etc. According to the relevant engineering experience, the physical and mechanical parameters of sliding zone soil are determined, and the stability of slope body is evaluated by qualitative and quantitative methods. Based on the MIDAS/GTS finite element strength reduction theory, the stability of the landslide is simulated, and the results are in good agreement with the results calculated by the transfer coefficient method. For the safety of residents' life and property, it is necessary to improve the safety reserve of landslide, so it is urgent to control the landslide project. (3) the study of landslide treatment scheme is based on the concrete project of landslide. According to the evaluation results of landslide stability, this paper analyzes the prevention and treatment measures of landslide and puts forward three control schemes by means of three indexes of landslide control: safety, economy and rationality. Then, the fuzzy analytic hierarchy process is used to select the three schemes. Finally, based on the technical, economic and environmental impact, the three schemes are compared to verify the reliability of the analytical hierarchy process (AHP). Finally, the optimal scheme of landslide treatment in Qiaogou Town is determined as the first scheme: dynamic monitoring of slope level and slope cutting drainage with anchor cable anti-slide pile retaining plate.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.22

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