| 软弱围岩隧道超前预加固技术试验研究 |
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| 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. |
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| 作者姓名： | 师晓权 张志强 李化云 |
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| 作者单位： | (西南交通大学 土木工程学院，四川 成都 610031) |
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| 基金项目： | 国家自然科学基金资助项目(51078318); 铁道部科技研究开发计划项目(2008G032-8) |
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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 |
| 收稿时间： | 2011-03-17; |
EXPERIMENTAL STUDY OF PRE-REINFORCEMENT TECHNOLOGY FOR WEAK SURROUNDING ROCK OF TUNNEL |
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| SHI Xiaoquan,ZHANG Zhiqiang,LI Huayun.EXPERIMENTAL STUDY OF PRE-REINFORCEMENT TECHNOLOGY FOR WEAK SURROUNDING ROCK OF TUNNEL[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(9):1803-1809. |
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| Authors: | SHI Xiaoquan ZHANG Zhiqiang LI Huayun |
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| Affiliation: | (School of Civil Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China) |
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| 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 ... |
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| Keywords: | tunnelling engineering pre-reinforcement technology tunnel face bolt pressure arch similarity model test |
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