【作者】 袁志东；

【导师】 马润勇；

【作者基本信息】 长安大学 ， 地质工程， 2009， 硕士

【摘要】 甘肃省地处青藏高原东北缘,新构造活动强烈,活动断裂尤其是全新世活动断裂极为发育。由西向东规模巨大的阿尔金活动断裂、昌马活动断裂、龙首山北缘活动断裂等,几乎已遍布整个甘肃省,严重威胁和制约着甘肃省公路工程建设和发展。活动断裂的公路工程危害研究显得非常紧迫和必要。本文在资料收集、野外调查基础上,系统分析了甘肃省区域构造,引用大陆动力学论证了活动断裂和地震的一致性,然后以活动断裂参数和地震参数为因子建立模型,综合评价了甘肃省活动断裂的危险性,进而做出对公路工程的危险性区划。本文的研究内容及成果包括:1)青藏高原东北缘的区域地质特征、甘肃省全新世活动断裂的分布特征(规模、分布、展布方向及性质)及其活动特征(包括最新活动形迹、活动年代、活动速率和历史地震);2)研究了甘肃省活动断裂的发育特征及其对公路工程的危害,分析了活动断裂的公路工程危害类型及其破坏模式,总结了甘肃省活动断裂与公路工程的交汇与破坏情况;3)利用模糊集理论中的综合评判方法,建立了甘肃省全新世活动断裂危险性综合评价模型,并对甘肃省全新世活动断裂进行了危险性区划。更多还原

【Abstract】 Gansu province is located in the northeastern margin of Qinghai-Tibet Plateau, the new strong tectonic is active, active faults, especially the Holocene active fault, extremely develops. The Altyn Tagh large-scale faults, the Changma faults, the northern margin of Long Hill from west to east and so on, almost throughout Gansu Province,which has posed a serious threat and constrain to the construction of highway projects in Gansu Province and development. The study on active fault’s hazards of highway projects is a very urgent and necessary.Basing on data collection and field survey, in this paper the regional structure of Gansu Province was analysed, citing proof of continental dynamics of the active faults and earthquakes consistency, and then to active faults and seismic parameters were the factors for model builting, a comprehensive evaluation of the Gansu Province on the risk of active faults was made, and then works on division to the danger of the highway had been done.In this paper, the study and the results include:1) The northeastern margin of Qingzang-Tibet plateau geological characteristics of the region, the distribution of characteristics (size, distribution, direction and nature of distribution) and its characteristics (including the latest activities of acting, activity time, activity rate and the historical earthquake) in Gansu Province Holocene active faults;2) The active faults in Gansu Province and its implications for the development of the characteristics of the hazards of highway engineering was studyed, active faults against the type of road works and their failure modes was analysed, the intersection of the Gansu Province of active faults and Highway Engineering and damage Gansu Province, active faults and the intersection of Highway Engineering and damage were summed up;3) Bye use of fuzzy comprehensive evaluation theory, the model of Gansu Province, active faults Holocene dangerous comprehensive evaluation was established, and Gansu Province Holocene active fault was divided on the danger.更多还原