引汉济渭工程秦岭隧洞地应力测试研究

发布时间：2018-07-24 13:30

【摘要】：地应力与围岩大变形、底板突水、岩爆、顶板垮落等地质灾害直接相关,对工程的稳定性影响巨大。地下工程失稳大都是由于施工开挖造成的岩体应力重新分布造成岩体发生大的变形引起的,而初始地应力场对应力重新分布起着重要作用,是地下工程开挖、支护等过程中分析和计算的基础。地应力是影响工程施工安全及工程本身安全的重要因素之一。地应力影响因子和来源性复杂,且在地壳岩体中的分布复杂多变。即使在同一区域,不同地点的地应力大小和方向的差异性也可能很大。因此,为准确了解特定区域的地应力场,预测岩体对工程施工及工程稳定性的影响,必须进行原位地应力测试。通过开展原位地应力测试工作,准确了解工程区域的地应力大小和方向,为工程设计、施工提供技术支撑。论文依托于“陕西省引汉济渭工程秦岭隧洞黄三段项目岩体应力测试”项目。主要研究内容如下:(1)搜集大量资料和文献,在调研和分析的基础上,对地应力的基本概念、主要影响因素和分布规律做了详细阐述,分析了我国的地应力场区域划分情况、陕西省及临区地应力特征。(2)在分析总结地应力测试的国内外研究现状的基础上,结合工程实际情况和条件,选取孔径变形法和水压致裂法作为秦岭隧洞黄三段岩体地应力测试方法,从测试原理、主要设备、测试步骤等方面对这两种方法进行了详细的对比分析。(3)通过孔径变形法对HZK14测试段及水压致裂法对HZK06测试段、HZK09测试段进行地应力测试,并对测试结果进行合理的分析。
[Abstract]:The geostress is directly related to the geological disasters such as large deformation of surrounding rock, water inrush of floor, rockburst, roof collapse and so on, which has a great influence on the stability of engineering. The instability of underground engineering is mostly caused by the stress redistribution of rock mass caused by construction excavation, and the initial ground stress field plays an important role in stress redistribution, which is the excavation of underground engineering. The foundation of analysis and calculation in the process of supporting and so on. Ground stress is one of the important factors that affect the construction safety and the safety of the project itself. The influence factors and source of crustal stress are complex, and the distribution in crustal rock mass is complex and changeable. Even in the same region, the magnitude and direction of in-situ stress may vary greatly. Therefore, in order to accurately understand the in-situ stress field in a specific area and predict the influence of rock mass on engineering construction and engineering stability, in-situ stress testing must be carried out. In order to provide technical support for engineering design and construction, the in-situ stress measurement is carried out to accurately understand the magnitude and direction of in-situ stress in the engineering area. The paper is based on the project of Rock stress Test of Qinling Tunnel in the third Section of Qinling Tunnel. The main research contents are as follows: (1) based on the investigation and analysis, the basic concept, main influencing factors and distribution law of in-situ stress are described in detail, and the regional division of in-situ stress field in China is analyzed. The characteristics of in-situ stress in Shaanxi Province and its adjacent areas. (2) on the basis of analyzing and summarizing the present research situation of in-situ stress testing at home and abroad, combined with the actual engineering situation and conditions, The pore deformation method and hydraulic fracturing method are selected as the testing methods for the in-situ stress of the third member of the Yellow River in Qinling Tunnel. The two methods are compared and analyzed in detail. (3) the in-situ stress of HZK14 and HZK09 of HZK06 are measured by pore deformation method and hydraulic fracturing method, and the test results are analyzed reasonably.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV221.2

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