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| Research on Supporting Effect of Bolt—grouting Combined Support by Means of Numerical Simulation |
| LI Hong—jun1，LIU Cheng—yu2，LI Yun2 |
| 1．China Railway Tunnel Group Co．Ltd，Luoyang，Henan 471000，China；2．Fuzhou University，Fuzhou，Fujian 350108，China |
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Abstract Research purposes: By means of numerical simulation，the comparative research is done on supporting effects of bolt—grouting support and bolt—shotcrete support in terms of controlling tunnel deformation and expansion of plastic zone，increasing anchoring force and decreasing the stress on initial support．
Research conclusions: Based on the concrete engineering project，in this paper，a systematic analysis is made of and a comparative research is done on the supporting effects of bolt—grouting support and bolt-shotcrete support under condition of fractured soft surrounding rocks by means of numerical method．The research shows that for fracture soft surrounding rock，the bolting—grouting combined support increases the self supporting capacity of surrounding rock and the radial supposing pressure on the tunnel circumference by increasing the strength of surrounding rock and anchoring force of bolt，and it is more efficient than bolt—shotcrete support in terms of confining the deformation of surrounding rock，controlling the expansion of plastic zone，increasing anchoring force，decreasing the stress on steel arch and shotcrete，improving initial support stability．Therefore，the bolt—grouting support is especially used for supporting the fractured soft surrounding rock．
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Received: 10 August 2009
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[1] 赵喜斌,刘成禹,张纪奎.管式锚杆提高破碎软弱围岩支 护效果的理论与实践[J].隧道建设, 2009(1): 1 -6.
Zhao Xibin, Liu Chengyu, Zhang Jikui. Theory and Practice of Tubular Rock Bolt in Improving Supporting Effect on Fractured and Loosening Surrounding Rock [J]. Tunnel Construction, 2009(1): 1 -6.
[2] 张广亮,刘雪松.中空自进式锚杆在小湾导流洞施工中 的应用[J].云南水力发电, 2006(3): 42 -43.
Zhang Guangliang, Liu Xuesong. The Application of Hollow Self-advancing Bolt in the Construction of Xiao-wan Training Tunnel [ J ]. Yunnan Water Power, 2006(3): 42 -43.
[3] 董新平.铁路膨胀岩隧道施工技术[J].铁道工程学报, 2001(1): 58 -61.
Dong Xinping. Study on Construction Technology for Railway Tunnels with Expansive Surrounding Rock [J]. Journal of Railway Engineering Socity, 2001(1): 58 -61.
[4] 张纪奎,方俊波.高应力千枚岩大变形隧道支护参数试 验研究[J].铁道工程学报, 2005(5): 66 -70.
Zhang Jikui, Fang Junbo. Experiment Research on Support Parameters of Large Strain Phyllite under High Stress [J]. Journal of Railway Engineering Socity, 2005 (5): 66 -70.
[5] 李树清,潘长良,王卫军.锚注联合支护煤巷两帮塑性区 分析[J].湖南科技大学学报, 2007(2): 4 -8.
Li Shuqing, Pan Changliang, Wang Weijun. Analysis Of Plastic Region of Sidewalls in Coal Drifts Reinforced by Association of Rock Bolt and Grouting [J]. Journal of Hunan University of Science & Technology, 2007 (2): 4 -8
[6] 龚曙光. ASYNS基础应用及范例解析[M ].北京:机械 工业出版社, 2003.
Gong Shuguang. Fundamental Application and Examples Analysis of ASYNS Code[M ]. Beijing:China Machine Press, 2003.
[7] 廖红建,王铁行.岩土工程数值分析[M ].北京:机械工 业出版社, 2006.
Liao Hongjian, Wang Tiehang. Numerical Analysis of Geotechnical Engineering [M ]. Beijing: China Machine Press, 2006.
[8] 何满潮,黄润秋,许强.工程地质数值法[M ].北京:科学 出版社, 2006.
He Manchao, Huang Runqiu, Xu Qiang. Numerical Method of Engineering Geology [M ]. Beijing: Science Press, 2006.
[9] 刘长武,陆士良.锚注加固对岩体完整性及准岩体强度 的影响[J].中国矿业大学学报, 1998(3): 221 -223.
Liu Changwu, Lu Shiliang. Effect of Bolting -grouting Reinforcement on Integrity and Quasi-strength of Rock Mass [J ]. Journal of China University of Mining & Technology, 1998(3): 221 -223.
[10]吴波,高波,索晓明.城市地铁小间距隧道施工形态的力 学模拟与分析[J].中国公路学报, 2005(3): 84 -89.
Wu Bo, Gao Bo, Suo Xiaoming. Mechanical Simulation and Analysis of Construction Behavior of Urban Metro Tunnel with Small Interval [J ]. China Journal of Highway and Transport, 2005(3): 84 -89. 5
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2010, Vol. 27 
