【作者】 曹廷；

【导师】 吴光；

【作者基本信息】 西南交通大学 ， 地质工程， 2012， 硕士

【摘要】 在建西南某铁路通过平原、丘陵及其陡峻的高山峡谷区,穿越发生过强烈地震的D1断裂带,D3褶断带,构造背景复杂,内外动力地质作用强烈,不良地质分布广类型多、规模大,复杂的地形、地质条件给铁路选线带来了严峻的挑战。根据铁路所经地区的特殊地质区域和地质环境,进行高烈度地震山区地质选线研究,具有重要的指导意义。本论文以铁路区域地质背景为基础,分析了控制铁路地质选线的主要因素,包括地形地貌、地震、活动断裂及次生地质灾害,这些因素对铁路地质选线具有重大影响。论文先介绍了铁路的宏观走向,主要结合区域地质情况综合比选了线路的两大宏观走向方案。论文针对铁路地质选线的控制因素,结合具体工点实例,根据前人总结出的地质选线原则,提出了以下几条地质选线技术：活动断裂及发震断裂带选线技术,高烈度地震山区越岭选线技术,高烈度地震山区河谷内移选线技术和不良地质地区的选线技术。确定了线路在经过D1断裂、D2断裂及D3断裂三大主要断裂,越岭地段,高山峡谷段及高原河谷段,不良地质地区的合理走向,最大限度保证线路经过路段的安全性,减少或避免地震及次生地质灾害对铁路工程的破坏。通过对西南某铁路的地质选线研究,总结出一套适合于高烈度地震山区的地质选线技术,这些研究成果也为以后铁路经过复杂地形、地质条件地区遇到类似问题如何解决时提供了重要参考价值。更多还原

【Abstract】 In topography, railway in southwest region crosses plain, high mountain and valley; in geological structure, it crosses the Dl fault zone, west D3fold and fault zone. The structure background is complicated, the inner and outer dynamic geological effect is intense. Unfavorable geology is wide in distribution, various in types and large in scale. Complex topographical and geological conditions bring serious challenge to railway route selection. Based on the special geological areas and geological environment in the region where the railway goes through, the research on geological route selection in mountain areas with high intensity earthquake is of important guiding significance.Based on regional geological background of railway, the paper analyses the main factors of controlling railway geological route selection (including topography, earthquakes, active faults and secondary geological disasters). These factors have a significant influence on geological route selection of railway. The study firstly introduces macro-trend of railway, comprehensively compared and selected two macro-trend schemes of the route which mainly combined with the geological conditions.According to the controlling factors of geological route selection of railway, combined with specific project examples, and based on the principles of geological route selection summed up by the predecessors, the following technologies of geological route selection have been put forward in the paper: i) route selection technology of active faults and earthquake fault zones, ii) route selection technology over mountain in mountain areas with high intensity earthquake, iii) valley ingression route selection technology and iv) route selection technology of adverse geological regions in mountain areas with high intensity earthquake. The alignment of route is determined when the route goes through three faults including Dl fault, D2fault and the west D3fault, the crossing mountain area, alpine gorge and plateau valley section, unfavorable geological region. So as to ensure the safe passing sections of railway at maximum degree, to reduce or avoid the damage to railway projects caused by earthquakes and secondary geological disasters.Through the research on geological route selection of railway in southwest region, a set of technologies of geological route selection suitable for mountain areas with high intensity earthquake have been summed up in the paper, the study results provide an important reference value for the future, how to solve the similar problem in case of railway passes through complex topographical and geological conditions areas.更多还原