【作者】 陈海燕；

【导师】 吴圣林；

【作者基本信息】 中国矿业大学 ， 地质工程（专业学位）， 2019， 硕士

【摘要】 本文以徐州市城市轨道交通1号线、2号线、3号线一期工程沿线不良地质作用为研究对象。基于地质环境背景,如气象水文条件、地形地貌条件、地层岩性、区域地质特征、工程地质特征、水文地质特征等,结合详细的野外调查、区域资料、采矿资料、钻探资料、原位测试、室内试验,全面论述徐州市区地铁沿线的3种主要不良地质作用:采空地面塌陷、岩溶地面塌陷、特殊类岩土(砂土、软土)。以3种不良地质作用为主要研究对象,查明其不良地质作用的类型、成因、分布和规模。预测其发展趋势,分析其对工程的影响及危害程度,并提出处理措施和建议。通过区域地质、工程地质和采矿资料,查清3条地铁沿线采空区分布及影响,根据影响范围程度的不同,提出加强上部结构处理、避让、注浆、监测等措施建议。根据岩溶地面塌陷不良地质作用发生的可能性大小,将3条地铁沿线分为基岩裸露区、非可溶岩区、隐伏岩溶区三个区域。以3号线和淮区间为例,分析岩溶发育程度,对岩溶地面塌陷进行预测分析,论述水文地质天窗位置更易产生岩溶塌陷。通过地形地貌分析查清3条地铁沿线砂粉土的分布及影响,论述地铁饱和粉(砂)土液化判别的步骤及方法。以3号线和淮区间为例,通过标准贯入判别法及静力触探判别法查清砂粉土是否为液化土及地基土的液化等级。同时,从砂粉土分布范围、降水、加固、施工工艺、监测等6方面提出砂土防治措施;从查明软土分布范围、采取合适盾构机及施工工艺等3方面提出软土的防治措施。本文的研究成果可为徐州地铁1号线、2号线、3号线一期工程的设计和安全施工提供参考。为探究不良地质作用对地下工程的影响提供一定的依据,具有一定的理论和实践意义。该论文有图15幅,表12个,参考文献68篇。更多还原

【Abstract】 This paper studied the adverse geological processes along the first phase of Xuzhou Urban Rail Transit Line 1,Line 2 and Line 3.Based on the geological environment background,such as meteorological and hydrological conditions,topographic and geomorphological conditions,stratigraphic lithology,regional geological characteristics,engineering geological characteristics and hydrogeological characteristics,etc.,combined with detailed field investigation,regional data,mining data,drilling data,in-situ measurement and laboratory tests,three main adverse geological processes along the metro line in Xuzhou City are comprehensively discussed,including ground subsidence of goaf;Karst ground subsidence,special types of rock and soil(sand,soft soil).Taking three kinds of adverse geological processes as the main research objects,the types,origins,distribution and scale of these adverse geological processes were identified.Predict its development trend,analyze its impact on the project and the degree of damage,and put forward treatment measures and suggestions.Through the regional geological,engineering geological and mining data,the distribution and influence of goaf along three metro lines were investigated.According to thedegree of influence range,measures and suggestions for strengthening the treatment of superstructure,avoidance of concession,grouting and monitoring were put forward.According to the possibility of occurrence of adverse geological processes of karst ground subsidence,the three metro lines are divided into three areas: base rock exposed area,non-soluble area and concealed karst area.Taking interval between Line 3 and Huaihe as examples,the development degree of karst is analyzed,the karst ground collapse is predicted and analyzed,and the location of hydrogeological skylight is more likely to produce karst collapse.Through the analysis of topography and geomorphology,the distribution and influence of sand and silt along three metro lines were investigated.The steps and methods of liquefaction discrimination of saturated silt(sand)along metro lines are discussed.Taking interval between Line 3 and Huaihe as examples,the liquefaction grade of sandy silt is ascertained by standard penetration method and static cone penetration method.At the same time,the prevention and control measures of sand and silt are put forward from six aspects: distribution range of sand and silt,precipitation,reinforcement,construction technology and monitoring.The prevention and control measures of soft soil are put forward from three aspects: ascertaining distribution range of soft soil,adopting appropriate shield machine and construction technology.The research results of this paper can provide reference for the design and safety construction of Xuzhou Metro Line 1,Line 2 and Line 3.It has certain theoretical and practical significance to provide a basis for exploring the influence of adverse geological action on underground engineering.This paper has15 figures,12tables and 68 references.更多还原