【作者】 范利学；

【导师】 肖盛燮；

【作者基本信息】 重庆交通大学 ， 防灾减灾与防护工程， 2009， 硕士

【摘要】 本文以长江三峡库区多元化的地质灾害和交通枢纽为背景,论述了严重影响库区交通设施(桥梁、公路、涵洞等)安全的崩滑流链式灾害。长江三峡库区河流纵横,沟谷广布,地势高差悬殊,由于强烈的新构造运动,江河深切,山高坡陡,气候﹑植被类型复杂多变,地质环境脆弱;特别自西部大开发以来,人类活动日益增强,环境破坏随之加剧,以及近年来地震活跃,降雨异常等因素的影响,致使崩滑流链式灾变日趋强烈,而崩滑流链式灾变加剧了灾害的破坏速度、强度、范围,给库区交通带来毁坏性的损害,因此研究崩滑流链式灾变特征、规律及危害,既是一个复杂的理论课题,也是一个重大的工程应用问题。本文以灾变链式理论为指导,以国家自然基金项目《基于灾变链式理论的多种灾害深化规律探索》S0879097和重庆市国土资源和房屋管理局科技计划项目《重庆库区地质灾害动态跟踪可视技术综合研究》为依托,结合巫山、奉节、云阳等地实际现场调研资料,论述在内外复杂因素的交互耦合作用下,崩塌、滑坡、泥石流3灾种中的任一或二个灾种率先爆发,诱使三重灾害先后接踵成链,同期迸发,其致灾及破坏的链式过程。此过程中,分析了崩滑流各个因素及因素间灾变机制,建立数学模型,并最终对潜在的崩滑流地质灾害对交通设施的影响进行评价。通过推导、模拟崩滑流灾变链式过程,展示崩滑流的致灾延续过程、演化中的介质载体的转化与渗透关系和前后灾变之间的嵌套推移作用。又针对地震灾害与库区洪水变化,分析二者形成崩滑流的本质区别。最后在建模的基础上对崩滑流之间的演变组合规律进行探讨,其理论结果对库区交通设施安全预警及防治有着重要的参考和借鉴作用。更多还原

【Abstract】 In this paper, the Three Gorges reservoir area a wide range of geological disasters in Three Gorges Reservoir Area transportation hub as the background, Discussed the serious impact on the reservoir area transportation facilities (bridges, roads, culverts, etc.) the safety of slump-flow chain disaster.Yangtze River Three Gorges reservoir area rivers, valleys wide cloth, the terrain height difference gap, due to a strong new tectonic movement, river deep, mountain high steep slope, climate, vegetation type complex, fragile geological environment; especially since the western development, human beings activities, increasing damage to the environment consequent increase, as well as seismic activity in recent years, rainfall anomalies and other factors, leading to slump-flow chain and increasingly strong geological disasters. Therefore, the Study slump-flow characteristics of geological disasters in the reservoir area chain variable rules and the dangers and impact of transport facilities is a complex theoretical issue, but also a major engineering application problems.In this paper, the theory as a guide, Based on the《heory of multi-hazard disaster chain rule to deepen exploration》S0879097and hongqing Science and Technology Land Resources and Housing Authority projects,《the Chongqing reservoir area of geological disasters in a comprehensive dynamic tracing visualization research》ined with Wushan, Fengjie, Yunyang and so the actual on-site investigation data, discusses the complex factors inside and outside the interactive coupling effect, This process, the slump-flow analysis of the various factors and factors that change between the chain mechanism, establish a mathematical model and, ultimately, the slump-flow of potential geological disasters on the evaluation of the impact of transport facilities.Through the derivation, simulation slump-flow chain transformation process, showing Slump flow flooding and continuation of the process of evolution of the media transformation and penetration of carrier relations and nested between the before and after the passage of the role of catastrophe. Finally, based on modeling the evolution of Slump-flow between the combination of the law to explore its theoretical result in the reservoir area security early warning and prevention of transport facilities has important reference and reference.更多还原