京沈客专北京段地面沉降、地裂缝发育特征及其危害性研究

发布时间：2018-03-14 06:30

本文选题：地面沉降　切入点：地裂缝　出处：《吉林大学》2015年硕士论文　论文类型：学位论文

【摘要】：京沈客专北京段位于北京市东北部区域。主要经过北京东北部平原区及东北部山区,地形多样,地质条件复杂,沿线构造复杂,不良地质、特殊岩土体发育,工程地质问题众多,影响范围广泛。在平原区,该铁路通过北京市重要的地面沉降区、地裂缝较发育区,线路沿线区域已经发现多处由此引起的房屋破坏、道路塌陷等现象。因此,对沿线地面沉降及地裂缝发育特征及危害性进行系统的研究是保证铁路建设、运营安全首要任务。本论文针对京沈客专北京段地面沉降、地裂缝发育特征进行了详细的研究和评价。京沈客专北京段在DK35+888处穿越高丽营地裂缝,黄庄~高丽营断裂起到主控条件,诱激因素是地面沉降,发育程度受到土层介质的制约和地貌环境影响。目前,该区域地裂缝仍在活动中,并且具有长期活动的趋势。本文采用三分带处理方法进行构造影响带分类,并据此进行地裂缝分区,高丽营地裂缝DK35+778-DK35+927段为地裂缝危险区,断裂两侧1000m范围内为地裂缝潜在危险性大区。DK21穿顺义断裂处、DK28穿南口-孙河断裂处,线路穿越活动断裂,断裂两侧1000m范围内确定是地裂缝潜在危险性大区。DK54穿北小营断裂处,地面沉降发育较弱,并且北小营断裂为次级断裂,断裂外1000米范围内是地裂缝潜在危险性小区。京沈客专北京段沿线经过东郊八里庄-通州台湖沉降区、朝阳区来广营-金盏沉降区和昌平沙河-八仙庄沉降区。本文通过长时间的监测,利用大量数据分析、总结拟建京沈铁路沿线主要沉降特征,并根据国土资源部发布的《地质灾害危险性评估规范》(报批稿)中对时速大于200km铁路工程遭受地质灾害预测评估分级。其中,铁路DK10~DK38区间此区间地面沉降发育程度为强发育,地面沉降灾害危险性大;铁路DK38~DK70区间位于地面沉降主要沉降中心之外,此区间位于地面沉降影响范围外,遭受地面沉降的可能性小,地面沉降发育程度为中等发育,地面沉降灾害危险性为中等。本文研究成果不仅为京沈铁路北京段的规划设计提供基础依据,还可进一步充实北京地区地面沉降与地裂缝的形成机理及危害性评价体系,具有一定的理论研究意义与实际应用价值。
[Abstract]:The Beijing-Shen-Ke special Beijing section is located in the northeast part of Beijing. It mainly passes through the northeast plain of Beijing and the northeast mountainous area. The terrain is diverse, the geological conditions are complex, the structure along the line is complicated, the bad geology, and the special rock and soil are developed. There are numerous engineering geological problems and a wide range of impacts. In the plain area, the railway passes through an important land subsidence area in Beijing, where the ground fissures are relatively developed, and many resulting house damage has been found in the areas along the lines. Therefore, it is the primary task of ensuring railway construction and operation safety to systematically study the characteristics and harmfulness of land subsidence and ground fissures along the railway line. The characteristics of ground fissures were studied and evaluated in detail. In the Beijing-Shenyang-Ke special section of Beijing, the cracks passed through Koryo camp at DK35 888, the Huangzhuang ~ Gaoliying faults played the main control condition, and the inducement factor was land subsidence. The degree of development is restricted by soil media and affected by geomorphological environment. At present, the ground fissures in this area are still active and have a trend of long-term activity. According to the division of ground fissures, the DK35 778-DK35927 section of Gaoli camp is a dangerous area of ground fissures, and the potential dangerous area of ground fissures within 1000m on both sides of the fault. DK28 passes through Nankou-Sunhe fault at Shunyi fault, and the line passes through active faults. Within 1000 m of the range of 1000 m on both sides of the fault, it is determined that the potential danger area of the ground fissures. DK54 passes through the Beixiaoying fault, and the ground subsidence develops weakly, and the Beixiaoying fault is a secondary fault. Within 1000 meters of the fault is the potentially dangerous area of ground fissures. Along the Beijing section of Jingshengke Special School, it passes through the Balizhuang-Tongzhou Lake subsidence area in the eastern suburb, The settlement area between Laiguangying and Jinzhang in Chaoyang District and Shahe-Baxianzhuang subsidence area in Changping area. This paper summarizes the main subsidence characteristics along the proposed Beijing-Shenyang railway by monitoring for a long time and analyzing a large number of data. And according to the classification of geological hazard prediction and evaluation of railway project over 200km per hour issued by Ministry of Land and Resources, the ground subsidence development degree in this section of railway DK10~DK38 interval is strong. The DK38~DK70 section of railway is located outside the main settlement center of land subsidence, which is located outside the influence area of land subsidence, the possibility of land subsidence is small, and the development degree of land subsidence is moderate. The research results of this paper not only provide the basis for the planning and design of Beijing section of Beijing-Shenyang railway, but also further enrich the formation mechanism and hazard evaluation system of ground subsidence and ground fissures in Beijing area. It has certain theoretical significance and practical application value.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.26

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