基于监测数据分析的隧道围岩稳定性研究
发布时间：2018-12-05 20:35
【摘要】：隧道围岩稳定性一直是国内外工程界所广泛关注的重要问题,国内外专家和学者对隧道围岩稳定性从理论到实践做了许多有益的探索和研究,取得了较为显著的成果。但由于隧道工程的复杂性及现行隧道围岩稳定性理论和判别方法尚不完善,目前隧道围岩稳定性判别上往往理论和实际有一定的脱节,主要依赖以往的工程经验和现场监控量测反馈来判定。因此,如何依据监测资料来判断并受广泛认可的公路隧道围岩稳定性判别标准仍是当今岩土工程界的重要课题。本文以十天高速关同隧道为依托工程,以泥质板岩隧道为工程背景,在收集现场大量资料和结合现场不同施工方法的基础上,通过围岩变形监测和结合前人的研究经验,对关同隧道围岩变形规律及围岩变形与施工状况的关系进行了较为系统的分析和总结,提出了关同隧道围岩稳定性控制基准。并结合隧道在施工过程中不同施工方法变更试验段监测数据分析,总结了不同施工方法的隧道变形特征及其优缺点,提出了台阶法施工中的技术要点及变形控制措施。及针对台阶法施工中的下台阶施工普遍存在的问题进行总结,探讨了针对下台阶施工的分步开挖法和跳步开挖法。主要研究成果如下:(1)结合关同隧道工程地质条件和施工状况,通过对大量常规变形段和特殊工况段的监测数据进行统计分析,总结了关同隧道围岩变形规律及其变形与施工状况的关系。分析结果表明,隧道围岩的稳定性受施工时采用的施工方法及进度影响较大,并根据关同隧道的施工状况建立了适用于关同隧道的围岩稳定性控制基准。(2)通过将关同隧道施工阶段的施工工法与围岩的变形稳定性特征相结合,分析了不同施工方法隧道围岩的变形特征,并总结了三台阶工法施工时变形较大的原因,提出了相应的变形控制措施和施工应对措施。(3)下台阶开挖是隧道台阶法工法施工中的重要工序,通过关同隧道围岩变形与开挖工序的相关关系分析,表明下台阶开挖引起的变形量是围岩总变形量中极为重要的组成部分(最大可达总变形量的40%左右),且下台阶的施工直接影响隧道施工的安全性和支护结构的闭合时间及隧道的施工速度。针对此问题并结合关同隧道现场施工,探讨了下台阶的施工方法,并分析了适用于下台阶开挖的分步开挖法和跳步开挖法的影响。
[Abstract]:The stability of tunnel surrounding rock has always been an important problem concerned by the engineering circles at home and abroad. Experts and scholars at home and abroad have made a lot of beneficial exploration and research on the stability of tunnel surrounding rock from theory to practice, and have achieved remarkable results. However, due to the complexity of tunnel engineering and the imperfect theory and method of judging the stability of tunnel surrounding rock, there is often a certain disconnection between theory and practice in judging the stability of tunnel surrounding rock at present. Mainly rely on the past engineering experience and site monitoring feedback to determine. Therefore, how to judge the stability of surrounding rock of highway tunnel based on monitoring data is still an important subject in geotechnical engineering. Based on ten days high speed Guantong tunnel and mud slate tunnel as the engineering background, this paper collects a large amount of data on the site and combines with different construction methods on the basis of monitoring the deformation of surrounding rock and combining the previous research experience. The law of surrounding rock deformation and the relation between surrounding rock deformation and construction condition of Guantong tunnel are analyzed and summarized systematically, and the control standard of surrounding rock stability of Guantong tunnel is put forward. Based on the analysis of monitoring data of different construction methods during tunnel construction, the tunnel deformation characteristics, advantages and disadvantages of different construction methods are summarized, and the technical points and deformation control measures in step method construction are put forward. This paper summarizes the common problems in the construction of the lower steps by step method, and probes into the step excavation method and the jump excavation method for the construction of the lower steps. The main research results are as follows: (1) according to the geological conditions and construction conditions of Guantong Tunnel, the monitoring data of a large number of conventional deformation sections and special working conditions are statistically analyzed. The law of surrounding rock deformation of Guantong tunnel and the relation between deformation and construction condition are summarized. The results show that the stability of surrounding rock is greatly affected by the construction method and schedule. According to the construction condition of Guantong tunnel, the stability control standard of surrounding rock is established. (2) by combining the construction method of Guantong tunnel construction stage with the deformation stability characteristics of surrounding rock, The deformation characteristics of surrounding rock of tunnel with different construction methods are analyzed, and the reasons of large deformation in construction of three-step construction method are summarized. The corresponding deformation control measures and construction countermeasures are put forward. (3) the lower step excavation is an important procedure in the construction of the tunnel step method. The correlation between the deformation of surrounding rock and the excavation procedure is analyzed. It is shown that the deformation caused by the excavation of the lower steps is an extremely important part of the total deformation of surrounding rock (the maximum deformation is about 40% of the total deformation). The construction of lower steps directly affects the safety of tunnel construction, the closing time of supporting structure and the construction speed of tunnel. Aiming at this problem and combining with the site construction of Guantong Tunnel, this paper discusses the construction methods of the lower steps, and analyzes the influence of the stepwise excavation method and the jump excavation method suitable for the lower step excavation.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U451.2
本文编号：2365434
[Abstract]:The stability of tunnel surrounding rock has always been an important problem concerned by the engineering circles at home and abroad. Experts and scholars at home and abroad have made a lot of beneficial exploration and research on the stability of tunnel surrounding rock from theory to practice, and have achieved remarkable results. However, due to the complexity of tunnel engineering and the imperfect theory and method of judging the stability of tunnel surrounding rock, there is often a certain disconnection between theory and practice in judging the stability of tunnel surrounding rock at present. Mainly rely on the past engineering experience and site monitoring feedback to determine. Therefore, how to judge the stability of surrounding rock of highway tunnel based on monitoring data is still an important subject in geotechnical engineering. Based on ten days high speed Guantong tunnel and mud slate tunnel as the engineering background, this paper collects a large amount of data on the site and combines with different construction methods on the basis of monitoring the deformation of surrounding rock and combining the previous research experience. The law of surrounding rock deformation and the relation between surrounding rock deformation and construction condition of Guantong tunnel are analyzed and summarized systematically, and the control standard of surrounding rock stability of Guantong tunnel is put forward. Based on the analysis of monitoring data of different construction methods during tunnel construction, the tunnel deformation characteristics, advantages and disadvantages of different construction methods are summarized, and the technical points and deformation control measures in step method construction are put forward. This paper summarizes the common problems in the construction of the lower steps by step method, and probes into the step excavation method and the jump excavation method for the construction of the lower steps. The main research results are as follows: (1) according to the geological conditions and construction conditions of Guantong Tunnel, the monitoring data of a large number of conventional deformation sections and special working conditions are statistically analyzed. The law of surrounding rock deformation of Guantong tunnel and the relation between deformation and construction condition are summarized. The results show that the stability of surrounding rock is greatly affected by the construction method and schedule. According to the construction condition of Guantong tunnel, the stability control standard of surrounding rock is established. (2) by combining the construction method of Guantong tunnel construction stage with the deformation stability characteristics of surrounding rock, The deformation characteristics of surrounding rock of tunnel with different construction methods are analyzed, and the reasons of large deformation in construction of three-step construction method are summarized. The corresponding deformation control measures and construction countermeasures are put forward. (3) the lower step excavation is an important procedure in the construction of the tunnel step method. The correlation between the deformation of surrounding rock and the excavation procedure is analyzed. It is shown that the deformation caused by the excavation of the lower steps is an extremely important part of the total deformation of surrounding rock (the maximum deformation is about 40% of the total deformation). The construction of lower steps directly affects the safety of tunnel construction, the closing time of supporting structure and the construction speed of tunnel. Aiming at this problem and combining with the site construction of Guantong Tunnel, this paper discusses the construction methods of the lower steps, and analyzes the influence of the stepwise excavation method and the jump excavation method suitable for the lower step excavation.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U451.2
【参考文献】
相关期刊论文 前10条
1 凌同华;李品钰;张胜;彭放枚;;隧道监测数据回归分析模型选择与优化的灰色局势决策法[J];中外公路;2013年01期
2 杨绍战;陈建勋;赵超志;左庆忠;;隧道监控量测数据分析处理系统的研发与应用[J];公路隧道;2011年01期
3 路军富;王明年;贾媛媛;喻渝;谭忠盛;;高速铁路大断面黄土隧道二次衬砌施作时机研究[J];岩土力学;2011年03期
4 王伟;周先齐;刘桃根;王海成;;基于粘塑理论的岩石流变本构模型研究[J];三峡大学学报(自然科学版);2010年06期
5 王鹏;;台阶法施工中下台阶开挖对预留变形量的影响[J];地下空间与工程学报;2010年05期
6 喻言;柳群义;冯德山;;隧道岩体稳定性的非线性单元安全系数分析[J];中南大学学报(自然科学版);2010年03期
7 汪振伟;付钢;;城市连拱隧道施工地表沉降分析及预测研究[J];岩土力学;2009年S2期
8 许文锋;;海底隧道围岩位移全曲线研究[J];岩土力学;2009年S1期
9 郑颖人;邱陈瑜;张红;王谦源;;关于土体隧洞围岩稳定性分析方法的探索[J];岩石力学与工程学报;2008年10期
10 李利平;李术才;张庆松;王刚;马富奎;;浅埋大跨隧道施工爆破监测与减震技术[J];岩土力学;2008年08期
相关博士学位论文 前1条
1 张良刚;特大断面板岩隧道围岩变形特征及控制技术研究[D];中国地质大学;2014年
相关硕士学位论文 前2条
1 黄宗英;隧道浅埋偏压段数值模拟和监控量测技术研究[D];长安大学;2009年
2 芦勃;初期支护缺陷对隧道稳定性的影响研究[D];重庆大学;2008年
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