软弱围岩隧道超前预加固技术试验研究

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摘要通过室内大比例尺相似模拟试验对掌子面锚杆预加固技术进行探讨，并且进行洞周预加固试验辅助对比分析，以明确掌子面锚杆作用特点及机制。通过分析试验位移和应力场特征，得到以下几点认识：(1) 掌子面锚杆所引起的纵向压力拱范围小于毛洞及小导管，能有效依靠拱效应来传递分配荷载，维持围岩稳定；(2) 掌子面锚杆对隧道掌子面前方垂直及水平方向应力的良好控制是形成有效纵向承载拱的基本前提，使得纵向拱具有较强的承载能力；(3) 掌子面锚杆能有效控制掌子面挤出变形。研究成果对软弱围岩隧道修建具有一定指导意义。

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关键词 ：隧道工程, 预加固技术, 掌子面锚杆, 压力拱, 相似试验

Abstract：Pre-reinforcement technology of tunnel face bolt is studied through large-scale similarity model test. A series of forepoling pre-reinforcement model tests around the tunnel as auxiliary contrast analysis are conducted to confirm the characteristics and mechanism of tunnel face bolt. By analyzing the model test results and stress field characteristics，the conclusions can be drawn as follows：(1) It is verified that tunnel face bolt improves the stability of the surrounding rock，relying on longitudinal arching effect by means of load transferring and distributing. In addition，the extent of longitudinal pressure arch for the case of face bolt reinforced is less than that of the case of non-reinforced tunnel and small pipe reinforced；(2) The excellent control effects of surrounding rock stress in front of tunnel face in horizontal and vertical directions by tunnel face bolt are the basic premise of forming effective longitudinal bearing arch. So the longitudinal pressure arch possesses great ultimate bearing capacity. (3) The tunnel face bolt can effectively control the extrusion deformation of tunnel face. The study results have important engineering significance for the construction of tunnel with weak surrounding rock.

Key words： tunnelling engineering pre-reinforcement technology tunnel face bolt pressure arch similarity model test

收稿日期: 2011-03-17

引用本文:

师晓权，张志强，李化云. 软弱围岩隧道超前预加固技术试验研究[J]. 岩石力学与工程学报, 2011, 30(9): 1803-1809.
SHI Xiaoquan，ZHANG Zhiqiang，LI Huayun. EXPERIMENTAL STUDY OF PRE-REINFORCEMENT TECHNOLOGY FOR WEAK SURROUNDING ROCK OF TUNNEL. , 2011, 30(9): 1803-1809.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I9/1803

[3]	PEILA D. A theoretical study of reinforcement influence on the stability of a tunnel face[J]. Geotechnical and Geological Engineering，1994，12(3)：145-168. " target="_blank">
[5]	YOO C，SHIN H K. Deformation behaviour of tunnel face reinforced with longitudinal pipes—laboratory and numerical investigation[J]. Tunnelling and Underground Space Technology，2003，18(5)：303-319. " target="_blank">
[8]	GNILSEN R. Underground structures design and instrumentation[M]. Amsterdam：Elsevier，1989：84-128. " target="_blank">
[10]	中华人民共和国行业标准编写组. TB 10003—2005 铁路隧道设计规范[S]. 北京：中国铁道出版社，2005.(The Professional Standards Compilation Group of People?s Republic of China. TB 10003—2005 Code for design of railway tunnel[S]. Beijing：China Railway Publishing House，2005.(in Chinese)) " target="_blank">
[13]	贾海莉，王成华，李江洪. 关于土拱效应的几个问题[J]. 西南交通大学学报，2003，38(4)：398-402.(JIA Haili，WANG Chenghua，LI Jianghong. Discussion on some issues in theory of soil arch effect[J]. Journal of Southwest Jiaotong University，2003，38(4)：398-402.(in Chinese))
[1]	DATE K，SOGA K，MAIR R J. Reinforcing effects of forepoling and facebolts in tunneling[C]// Proceedings of the 6th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground. Shanghai：[s. n.]，2009：635-640. " target="_blank">
[4]	CHAMBON P，CORTE J F. Shallow tunnels in cohesionless soil stability of tunnel face[J]. Journal of Geotechnical Engineering，1994，120(7)：1 148-1 165. " target="_blank">
[9]	杨俊杰. 相似理论与结构模型试验[M]. 武汉：武汉理工大学出版社，2005：178-186.(YANG Junjie. Similarity theory and structural model test[M]. Wuhan：Wuhan University of Technology Press，2005：178-186.(in Chinese)) " target="_blank">
[2]	KAMATA H，MASHIMO H. Centrifuge model test of tunnel face reinforcement by bolting[J]. Tunnelling and Underground Space Technology，2003，18(2/3)：205-212. " target="_blank">
[6]	翟进营，杨会军，王莉莉. 新意法隧道设计施工概述[J]. 隧道建设，2008，28(1)：46-55.(ZHAI Jinying，YANG Huijun，WANG Lili. Design and construction of tunnels by means of ADECO-RS approach[J]. Tunnel Construction，2008，28(1)：46-55.(in Chinese))
[12]	梁晓丹，刘刚，赵坚. 地下工程压力拱拱体的确定与成拱分析[J]. 河海大学学报：自然科学版，2005，33(3)：314-317.(LIANG Xiaodan，LIU Gang，ZHAO Jian. Definition of pressure arch and analysis of arching action in underground engineering[J]. Journal of Hohai University：Natural Sciences，2005，33(3)：314-317.(in Chinese))
[7]	梅志荣，陈涛. 高速铁路隧道全断面预加固技术的应用研究[J]. 隧道建设，2008，28(5)：542-547.(MEI Zhirong，CHEN Tao. Research on application of full-face pre-reinforcing technology in high speed railway tunnel[J]. Tunnel Construction，2008，28(5)：542-547.(in Chinese))
[11]	梁晓丹，宋宏伟，赵坚. 隧道压力拱与围岩变形关系[J]. 西安科技大学学报，2008，28(4)：647-650.(LIANG Xiaodan，SONG Hongwei，ZHAO Jian. Relationship between pressure arching and displacement of rock mass around underground openings[J]. Journal of Xi?an University of Science and Technology，2008，28(4)：647-650.(in Chinese))