【作者】 杨延昭；

【导师】 钟生军；

【作者基本信息】 西南交通大学 ， 地质工程， 2012， 硕士

【摘要】 地面沉降是在自然因素和人为因素的作用下,由于地壳表层土压缩而导致区域性地面标高缓慢降低的一种环境地质现象。苏锡常地区位于我国江苏省南部,处于长江三角洲中心地带,是我国经济和文化最发达的地区之一。然而,随着苏锡常地区经济的高速发展、人口的不断增长、城镇化进程的不断加快,苏锡常地区资源、环境与发展问题日益突出。特别是地下水资源的开采日益增大,已经引发了大面积的地面沉降,对京沪高速铁路的正常运营构成了极大威胁。开展苏锡常地区地面沉降的现状调查及成因分析,并针对地面沉降对京沪高速铁路存在的影响及相应防治措施进行讨论,对预防和治理地面沉降,保证京沪高速铁路正常、安全的运营具有重要的科学价值。论文全面调查了京沪高速铁路苏锡常地区地面沉降的地质背景,结合苏锡常地区的自然地理,地质条件以及地面沉降发育的基本状况,详细分析研究了苏锡常地区地面沉降的形成机制及特征。综述了地面沉降的成因机制及其影响因素并分析了苏锡常地区地面沉降的主要因素。在此基础上,选取京沪高速铁路常州至上海段沿线一个典型的区域为研究对象,以相关工程实例和地质资料为依据,对抽取浅层地下水产生高速铁路路基沉降进行模拟,分析抽取浅层地下水对京沪高速铁路路基结构的影响,并得出相关结论。结合数值模拟所得抽取地下水引发地面沉降对京沪高速铁路路基结构的影响,总结苏锡常地区地面沉降对京沪高速铁路的影响。针对苏锡常地区地面沉降对京沪高速铁路的影响,提出相应的措施来控制地面沉降,减少地面沉降的危害。更多还原

【Abstract】 Land subsidence is an environmental and geological phenomenon in the role of natural and human factors, with the topsoil of crust compressed and the regional ground elevation slowly reduced. Located in the south of Jiangsu province, as a part of the Yangze River Delta, the Su-Xi-Chang area is one of the most developed areas in China in the field of economy and culture.However, the conflict between the resource and environment is becoming more and more serious, with the rapid economic development of Su-Xi-Chang area, the rapid population growth and the accelerating urbanization. In particular, the exploitation of ground water resources has led to a large area of subsidence, which has a grave threat to the normal operation of the Beijing-Shanghai high-speed railway. To carry out the situation investigation and cause analysis and to discuss the influence of the land subsidence around Su-Xi-Chang areat to the Beijing-Shanghai high-speed Railway and the corresponding control measures are of important scientific value to the prevention and control of land subsidence and the guarantee to the operation and safe of the Beijing-Shanghai high-speed railway.The paper investigated the geological background of Beijing-Shanghai high-speed railway in the research area. Combining with the physical geography, the geological conditions and the basic situation of the subsidence, it analyzed the formation mechanism and characteristics in detail. Then it reviewed the genetic mechanism of land subsidence and its influencing factors and analyzed the main factors of the land subsidence. On this basis, the paper selected a small area along the Beijing-Shanghai high-speed railway as the object for the study. Based on the relevant projects and geological materials, the subsidence of the embankment of the high-speed railway caused by the exploitation of the shallow groundwater was simulated with the detail. Analysis the influence to Beijing-Shanghai high-speed rail embankment resulted by the exploitation of the shallow groundwater, a range of the related conclusion was then obtained. This paper still reviewed the influence of the high-speed railway caused by the subsidence, combining with the conclusion from the simulation. Finally, the relating measures to control and reduce the harmfulness caused by the subsidence were proposed.更多还原