毕业设计（论文）--强震条件下反倾层状结构滑坡形成机理研究.docVIP

强震条件下反倾层状结构滑坡形 成机理研究 作者姓名：叶小卫 学号：200603040234 专业：勘查技术与工程（工程地质） 指导教师：赵建军 【摘要】汶川地震使龙门山地区发生了大量的崩塌、滑坡等地质灾害。这些由强震诱发的滑坡与一般滑坡不同，具有体积大，海拔高（具高程效应）等特点。为了研究坡体发生破坏时的地震加速度情况，本文以石亭江流域金河磷矿处的滑坡为研究对象，在野外调查及收集前人资料的基础上，研究了滑坡区工程地质条件、岩体结构特征，分析了滑坡的变形破坏模式及形成机理，确定滑坡破坏模式为拉裂-剪断型。通过反演分析，确定在地震加速度高程放大效应下，地震水平加速度为2.97g，地震垂直加速度为1.47g大于重力加速度，判断该滑坡在地震条件下以抛射运动方式发生破坏。最后对强震区同类滑坡提出防治措施与建议。 关键词：汶川地震 滑坡 高程效应 拉裂-剪断型 地震加速度 Research on the Formation Mechanism of the counter-inclined Laminated structure Landslide under Strong Earthquake Name:Ye xiaowei Student No:200603040234 Major:Exploration Technique and Engineering Supervisor:Zhao jianjun Abstract: Wenchuan earthquake sparked much landslide and collapse in the longmenshan area. The landslides caused by earthquake is different from general landslide,having the characteristic of large size, the high altitude (with altitude effects). In order to study the seismic acceleration when the slope collapse,this paper studied the slope at the TingJiang basin JinHe phosphate rock. According to the field investigation and predecessors’ information, we studied the engineering geological conditions of the landslide and the structure characteristics, the deformation and failure of the landslide mode and the formation mechanism, we determined that the landslide failure mode is Rip–cut. Through inversion analysis, we confirmed that seismic level acceleration is 2.97g and its vertical acceleration is 1.47g(being larger than gravity acceleration) on the case of seismic acceleration elevation amplification effect. The landslide collapse in the mode of trajectory in earthquake condition. At last, we brought forward The control measures and suggestion for the congeneric landslide in the macroseismic area. Key words: Wenchuan Earthquake Landslide Height effect Tension- cracking type Seismic acceleration  目 录 第1章 前言 1 1.1 选题依据及研究意义 1 1.2 国内外研究现状 2 1.3 研究内容及思路 4 1.3.1 研究内容 4 1.3.2 研究思路 4 第2章 研究区域自然地理及地质条件 6 2.1 自然地理条件 6