支护结构的稳定性有重大影响。
(3) 该断面锚杆轴力初期值较大,最大达到 51.8kN,在该断面下部边墙进行二次衬砌后,锚杆轴力明显下降并趋于稳定。
(4) 施作二次衬砌后,工字钢拱应力、锚杆轴力及围岩与支护间的接触压力均出现下降趋势并最终趋于稳定。由此可见,二次衬砌在改善围岩初期支护受力状态以及增加初期支护与围岩的稳定性方面起着十分重要的作用。
参考文献(References):
[1] 冯卫星,徐明星. 铁路隧道新奥法施工新实践[J]. 岩石力学与工程学报,2001,20(4):524–526.(Feng Weixing,Xu Mingxing. Newpractice of NATM in railway tunnel construction[J]. Chinese Journalof Rock Mechanics and Engineering,2001,20(4):524–526.(inChinese))
[2] 刘洪洲. 华蓥山隧道新奥法施工中的位移量测分析[J]. 世界隧道,1999,(3):28–30,35.(Liu Hongzhou. Displacement measurementanalysis of Huayingshan tunnel during excavation with NATM[J].World Tunnelling,1999,(3):28–30,35.(in Chinese))
[3] 王建宇. 隧道工程监测和信息化设计原理[M]. 北京:中国铁道出版社,1990.(Wang Jianyu. Principle of Information Design andMonitoring of Tunnel Engineering[M]. Beijing:China RailwayPublishing House,1990.(in Chinese))
[4] 刘招伟,何满潮,肖红渠. 浅埋大跨连拱隧道施工中变形的监测与控制措施[J]. 岩土工程学报,2003,25(3):339–342.(Liu Zhaowei,He Manchao,Xiao Hongqu. Deformation monitoring and controlmeasures of shallow large-span duel-linked arch tunnel[J]. ChineseJournal of Geotechnical Engineering,2003,25(3):339–342.(inChinese))
[5] 杨成永,张 弥,白小亮. 隧道喷混凝土衬砌结构可靠度分析的位移方法[J]. 岩石力学与工程学报,2003,22(2):266–269.(YangChengyong,Zhang Mi,Bai Xiaoliang. Displacement-based methodfor reliability analysis of shotcrete lining of tunnel[J]. ChineseJournal of Rock Mechanics and Engineering,2003,22(2):266–269.(in Chinese))
[6] 康 宁. 东港隧道的施工监控[J]. 岩石力学与工程学报,1998,17(2):140–147.(Kang Ning. Construction monitoring of Donggangtunnel[J]. Chinese Journal of Rock Mechanics and Engineering,1998,17(2):140–147.(in Chinese))
[7] 黄宏伟,徐 凌. 大风哑口岩石公路隧道围岩及初期支护变形与内力研究[J]. 岩石力学与工程学报,2004,23(1):44–52.(HuangHongwei,Xu Ling. Study on deformation and internal force ofsurrounding rocks and initial support in Dafengyakou rock roadtunnel[J]. Chinese Journal of Rock Mechanics and Engineering,2004,23(1):44–52.(in Chinese))
[8] 杨典森,陈卫忠,杨为民,等. 龙滩地下洞室群围岩稳定性分析[J].岩土力学,2004,25(3) 上一页 [1] [2] [3] [4] [5] 下一页
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