云南高烈度山区公路隧道监测规律分析与数值模拟研究
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摘要
监控量测作为"新奥法"隧道施工的三要素之一,在隧道的建设施工过程中具有重要的意义。然而在很多施工过程中,监控量测还停留在纸面上,远远没有达到其应有的效果,在指导施工、保证施工安全方面的作用十分有限。因此,研究隧道工程施工监控量测具有重要的实际意义和研究价值。文章以云南省某在建山区公路隧道为背景,对现场监测数据进行整理分析,总结高烈度区域复杂地质条件下山区公路隧道围岩变形与衬砌受力的规律。通过有限元软件对某监测断面进行数值模拟,与监测结果中拱顶沉降、水平收敛进行对比验证,证明了两项工作的可靠性。将监测所得到的信息与规律指导后续的工程施工,可实现"动态设计、动态施工"的目的。
As one of the three elements of " New Austrian Tunnelling Method", monitoring is of great significance in the process of tunnel construction. However, in construction of many tunnels, the monitoring still remains on the paper, far from achieving its due effect, and has a very limited role in guiding construction and ensuring construction safety. Therefore,the study of tunnel construction monitoring has practical significance and research value. On the background of a tunnel under construction in Yunnan province, this paper collates and analyzes the monitoring data and sums up the law of the surrounding rock deformation and lining stress of the mountain tunnel under the complex geological conditions in high intensity region. The numerical simulation of a monitoring section is carried out by finite element software, and the results are compared with the vault settlement and horizontal convergence in monitoring results, which proves the reliability of the two tasks. The basic purpose of dynamic design and construction is achieved by guiding subsequent engineering construction with the information and laws of monitoring.
As one of the three elements of " New Austrian Tunnelling Method", monitoring is of great significance in the process of tunnel construction. However, in construction of many tunnels, the monitoring still remains on the paper, far from achieving its due effect, and has a very limited role in guiding construction and ensuring construction safety. Therefore,the study of tunnel construction monitoring has practical significance and research value. On the background of a tunnel under construction in Yunnan province, this paper collates and analyzes the monitoring data and sums up the law of the surrounding rock deformation and lining stress of the mountain tunnel under the complex geological conditions in high intensity region. The numerical simulation of a monitoring section is carried out by finite element software, and the results are compared with the vault settlement and horizontal convergence in monitoring results, which proves the reliability of the two tasks. The basic purpose of dynamic design and construction is achieved by guiding subsequent engineering construction with the information and laws of monitoring.
引文
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[2]李鹏飞,田四明,赵勇,朱永全,王树栋.高地应力软弱围岩隧道初期支护受力特性的现场监测研究[J].岩石力学与工程学报,2013,32(S2):3509-3519.LI Pengfei,TIAN Siming,ZHAO Yong,et al. In-situ Monitoring Study of Mechanical Characteristics of Primary Lining in Weak Rock Tunnel with High Grostress[J]. Chinese Journal of Rock Mechanics and Engineering,2013,32(S2):3509-3519.
[3]孙克国,李术才,张庆松,等.特长山岭隧道衬砌监测及模拟研究[J].岩石力学与工程学报,2007,(S2):4465-4470SUN Keguo,LI Shucai,ZHANG Qingsong,et al. Study on Monitoring and Simulation of Super-long Mountain Tunnel Lining[J].Chinese Journal of Rock Mechanics and Engineering,2007,(S2):4465-4470.
[4]房倩,粟威,张顶立,等.基于现场监测数据的隧道围岩变形特性研究[J].岩石力学与工程学报,2016,35(9):1884-1897.FANG Qian,SU Wei, ZHANG Dingli,et al. Tunnel Deformation Characteristics Based on On-site Monitoring Data[J]. Chinese Journal of Rock Mechanics and Engineering,2016,35(9):1884-1897.
[5]武胜林,邓洪亮,陈凯江,等.隧道监测数据信息化技术及应用研究[J].测绘通报,2013,(8):25-27+48.WU Shenglin, DENG Hongliang, CHEN Kaijiang, et al. Tunnel Monitoring Data Information Technology and Application[J].Bulletin of Surveying,2013,(8):25-27+48.
[6]李志刚.隧道监测远程数据库系统开发[D].上海:同济大学,2007.LI Zhigang. The Development of Tunnel Monitoring Remote Database System[D]. Shanghai:Tongji Univerity,2007.
[7]中华人民共和国行业标准编写组.公路隧道施工技术规范:JTG F60-2009[S].北京:人民交通出版社,2009.The Professional Standards Compilation Group of People's Republic of China. Code for Construction Technique of Highway Tunnel:JTG F60—2009[S]. Beijing:China Communications Press,2009.
[8]张军荣,廖占勇.振弦式渗压计埋设过程中容易被忽视的几个细节[J].水电自动化与大坝监测,2011,35(3):71-72+78.ZHANG Junrong, LIAO Zhanyong. Some Easily Ignored Aspects in Embedding Vibrating Wire Piezometers[J]. Hydropower Automation and Dam Monitoring,2011,35(3):71-72+78.
[9]中华人民共和国行业标准编写组.公路隧道设计规范:JTG D70-2004[S].北京:人民交通出版社,2004.The Professional Standards Compilation Group of People's Republic of China. Code for Design of Highway Tunnel:JTG D70-2004[S]. Beijing:China Communications Press,2004.
[10]中华人民共和国行业标准编写组.公路隧道设计细则:JTG/T D70-2010[S].北京:人民交通出版社,2010.The Professional Standards Compilation Group of People's Republic of China. Guidelines for Design of Highway Tunnel:JTG/T D70-2010[S].Beijing:China Communications Press,2010.