张家口西太平山崩塌稳定性评价及危险性分区研究

发布时间：2018-05-20 00:23

本文选题：崩塌灾害 + 信息量法　；参考：《石家庄经济学院》2015年硕士论文

【摘要】：张家口西太平山崩塌灾害位于张家口市桥西区西太平山公园一带,该崩塌灾害威胁着桥西区大境门办事处、西山底社区和黄土场社区的8幢楼、31个院落,约1160人的生命财产安全,因此,开展西太平山崩塌地质灾害研究工作是必要的和紧迫的。本文对张家口西太平山的地理位置、地质条件、气象条件等进行概述,对研究区危岩体的工程地质条件、危岩体特征、影响因素及危岩形成机制进行分析研究。基于上述研究结果,采用极限平衡法计算崩塌体的稳定性。介绍四种不同类型崩塌破坏计算方法(滑移式、倾倒式、拉裂式、膨胀式),分别对自然状态、自然状态+暴雨、自然状态+地震三种工况进行计算。将所得结果进行比较,综合评价研究区的危岩稳定性。此外,根据落石崩落的运动形式分析计算危岩破坏后的速度、碰撞动能、运动轨迹等。基于GIS软件利用信息量法得出研究区的崩塌灾害危险性分区图,利用模糊综合评价法得到研究区崩塌稳定性分区图。将危险性分区图与崩塌稳定性分区图进行比较,并与极限平衡法计算的危岩分布图进行比较,以此验证评价体系建立的正确与否。极限平衡法评价崩塌灾害的稳定性局限于单个危岩体,以上两种崩塌灾害评价方法是区域性的,起到对极限平衡法的验证与补充的作用。通过对张家口西太平山崩塌危岩稳定性的研究,得出研究区中选取得54个危岩体(带)中有15个在自然状态下属于基本稳定,在暴雨和地震的影响下成为欠稳定和不稳定。有11个在自然状态下属于欠稳定,在暴雨和地震的影响下成为不稳定。此外将极限平衡法评价结果与基于信息量法和模糊综合评价法所得的分区图进行比较,88.9%的危岩体(带)落在了崩塌稳定性评价图的欠稳定区,全部的危岩体(带)落在高危险性分区中,以此验证了研究区崩塌灾害危险性分区的合理性。
[Abstract]:The collapse disaster of West Taiping Mountain in Zhangjiakou City, located in the area of West Taiping Mountain Park in Qiaoxi District of Zhangjiakou City, threatens the Daaaomen office in Qiaoxi District, 8 buildings and 31 yards in the community of Xishan bottom and Loess Farm. About 1160 people are safe in life and property, so it is necessary and urgent to carry out the research on the geological hazards of the collapse of the West Taiping Mountain. In this paper, the geographical location, geological conditions and meteorological conditions of the west Taiping Mountain in Zhangjiakou are summarized, and the engineering geological conditions, the characteristics of the dangerous rock mass, the influencing factors and the formation mechanism of the dangerous rock mass in the study area are analyzed and studied. Based on the above results, the limit equilibrium method is used to calculate the stability of collapse body. This paper introduces four kinds of calculation methods of collapse and failure (slip type, toppling type, tension type, expansion type), and calculates the natural state, the natural state rainstorm and the natural state earthquake respectively. The results are compared to evaluate the stability of dangerous rock in the study area. In addition, the velocity, collision kinetic energy and motion track of dangerous rock after destruction are analyzed and calculated according to the motion form of falling rock caving. Based on GIS software, the zoning map of collapse hazard is obtained by the method of information content, and the zoning map of collapse stability is obtained by using fuzzy comprehensive evaluation method. The hazard zoning map is compared with the collapse stability map and the dangerous rock distribution map calculated by the limit equilibrium method is compared to verify the correctness of the evaluation system. The stability of limit equilibrium method for evaluating collapse disaster is limited to a single dangerous rock mass. The above two methods are regional and play an important role in the verification and supplement of limit equilibrium method. Through the study of the stability of the collapse rock in the west Taiping Mountain of Zhangjiakou, it is concluded that 15 of the 54 dangerous rock masses (belts) selected in the study area are basically stable in the natural state, and become unstable and unstable under the influence of heavy rain and earthquake. Eleven of them are unstable under natural conditions and unstable under the influence of rainstorms and earthquakes. In addition, the evaluation results of limit equilibrium method are compared with the zoning map based on information content method and fuzzy comprehensive evaluation method. 88. 9% of the dangerous rock mass (zones) fall in the understable region of the collapse stability evaluation map. All the dangerous rock masses (zones) fall in the high risk zone, which verifies the rationality of the danger zoning of collapse disaster in the study area.
【学位授予单位】：石家庄经济学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.21

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