低渗透性地层隧道超前加固改进研究

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Abstract Abstract：Research purposes：When Wuhan metro line 2 went through poor permeability of clay or clay gravel stratum, as a conventional construction method, "small duct grouting in advance" in tunnel arch was difficult to construct, and its advanced reinforcement effect was not obvious. In order to solve this problem, this paper put forward a scheme that the application of steel instead of leading anchor rod or steel tube. By comparing arching effect between rectangular cross-section steel and circular cross-section steel, this paper suggested to adopt the rectangular cross section steel. The results show that the rectangular cross-section steel could improve strengthening effect. And it can accumulate the experience to similar projects．
Research conclusions：According to the research, it can be drawn:（1）For the same width and spacing of the rectangular and circular cross section steel, rectangular steel has better the arching effect, and it can bear higher soil load;（2）In terms of the bending capacity and price, rectangular section steel is better than that of circular steel tube;（3）In the small percolation coefficient strata, grouting effect is poor, rectangular steel can be used in place of the small duct grouting in advance for supporting in advance;（4）The research results can be applied in the tunnel advanced support design.
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Key words： Key words: tunnel; poor permeability; advanced reinforcement; improvement

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2015/V32/I1/99

［1］周兴国,高永涛,卢宏建,等. 超前注浆小导管支护机理与效果分析［J］. 西安建筑科技大学学报(自然科学版),2010(4):545-549.
Zhou Xingguo, Gao Yongtao, Lu Hongjian,etc. Study of Support Mechanism and Effect of Advance Grouting Ductile Technology［J］. J.Xi′an Univ .of Arch.&Tech.(Natural Science Edition),2010(4):545-549.
［2］李东勇,徐祯祥,侯庆华. 暗挖隧道超前导管注浆对地层位移影响规律的研究［J］. 铁道建筑,2007(8):34-37.
Li Dongyong, Xu Zhenxiang, Hou Qinghua. Research on Influence Rules of Displacement about Advanced Grouting Conduit in Shallow Depth Bored Tunnel［J］. Railway Engineering,2007(8):34-37.
［3］许明,刘先珊. 小导管注浆黏土隧道破坏机制的试验与理论研究［J］. 土木建筑与环境工程,2013(3):25-31.
Xu Ming, Liu Xianshan. Experimental and Theoretical Solutions on Collapse Mechanism of Tunneling with Embedded Forepoles ［J］. Journal of Civil, Architectural & Environmental Engineering, 2013(3):25-31.
［4］吕波. 地铁工程地层预加固技术综合分析［J］. 施工技术,2012(S1):68-71.
Lv Bo. Comprehensive Analysis on Stratum Pre-reinforcement Techniques for Subway Engineering［J］. Construction Technology,2012(S1):68-71.
［5］曹桢楹. 管棚及注浆加固在隧道坍方治理中的应用［J］. 公路,2004(6):173-176.
Cao Zhenying. The Application of Pipe and Grouting Stabilization in Tunnel Collapse Reinforcement ［J］.Highway,2004(6):173-176.
［6］伍振志,傅志锋,王静,等. 浅埋松软地层开挖中管棚注浆法的加固机理及效果分析［J］. 岩石力学与工程学报,2005（6）:1025-1029.
Wu Zhenzhi, Fu Zhifeng, Wang Jing, etc. Study of Support Mechanism and Effect of Shedpipe Grouting Technology for Tunnelling Construction in Shallow-Buried Soft Stratum［J］.Chinese Journal of Rock Mechanics and Engineering,2005（6）:1025-1029.
［7］邹明波,张文新. 新建赣韶铁路黄金隧道塌方段注浆加固技术探讨［J］. 现代隧道技术,2013(4):176-182.
Zou Mingbo, Zhang Wenxin. Discussion of Grouting Reinforcement Technology for the Collapsed Section of the Huangjin Tunnel on the Newly-Built Ganzhou-Shaoguan Railway［J］. Modern Tunnelling Technology,2013(4):176-182.
［8］杨钊,戴宇,余俊. 厦门翔安隧道进口段管棚支护参数优化分析［J］. 铁道工程学报,2009(7):76-79.
Yang Zhao, Dai Yu, Yu Jun. Analysis of Optimizing Parameters for Pipe Roof Construction to the Portal Section of Xiang′an Submarine Tunnel in Xiamen［J］. Journal of Railway Engineering Society,2009(7):76-79.
［9］李林,李德才. 深圳地铁区间隧道软弱围岩超前预加固施工技术研究［J］. 现代隧道技术,2005(5):79-82.
Li Lin, Li Decai. Study on The Techniques of Advance Strengthening of Weak Soils for a Transit Tunnel of Shenzen Metro［J］. Modern Tunnelling Technology,2005(5):79-82.
［10］韩兴国,崔江余. 地铁施工中复杂条件下超前加固技术的应用［J］. 铁道建筑,2006(2):52-54.
Han Xingguo, Cui Jiangyu. The Application of the Advance Reinforcement Technology under Complicated Conditions in Subway Construction［J］. Railway Engineering,2006(2):52-54.
［11］肖广智,游旭. 高压水平旋喷桩超前支护技术在铁路隧道工程中的应用［J］. 现代隧道技术,2014(2):108-114.
Xiao Guangzhi, You Xu. Application of the Advance Support of High-Pressure Horizontal Jet Grouting Piles in Tunnel Engineering［J］. Modern Tunnelling Technology,2014(2):108-114.
［12］王梦恕．中国隧道及地下工程修建技术［M］.北京:人民交通出版社,2010．
Wang Mengshu. Tunnelling and Underground Engineering Technology in China［M］. Beijing: China Communications Press,2010.