| 浅埋偏压洞口段围岩加固施工实例 |
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| 引用本文： | 毛志国. 浅埋偏压洞口段围岩加固施工实例[J]. 铁道建筑技术, 2009, 0(11): 92-95 |
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| 作者姓名： | 毛志国 |
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| 作者单位： | 中铁十八局集团有限公司隧道工程公司,天津,300222 |
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| 摘 要： | 浅埋偏压段隧道洞口围岩具有岩石破碎、稳定性差的特点,采用常规的锚喷支护形式施工,容易出现塌孔、卡钻的事故。为实现安全有效的洞口开挖,必须先行对围岩进行一定程度的加固。结合工程实例,探讨管棚及回填灌浆综合加固方法,实践证明加固效果良好。
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| 关 键 词： | 隧道施工 浅埋偏压 洞口加固 管棚支护 回填灌浆 |
The Construction Example for the Surrounding Rock Reinforcement in the Shallow-buried and Unsymmetrical-pressure Portal Section |
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| Mao Zhiguo. The Construction Example for the Surrounding Rock Reinforcement in the Shallow-buried and Unsymmetrical-pressure Portal Section[J]. Railway Construction Technology, 2009, 0(11): 92-95 |
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| Authors: | Mao Zhiguo |
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| Affiliation: | Mao Zhiguo (China Railway 18th Bureau Group Co. Ltd. , Tianjin 300222, China) |
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| Abstract: | The surrounding rocks of the shallow-buried and unsymmetrical-pressure portal section have the characteristics of broken rocks and poor stability. The accidents of collapsing hole and sticking drill happen easily if we use the conven- tional form of roof spraying support. In order to achieve safe and effective digging of the portal section, it is a must to rein- force the surrounding rocks in a certain degree. Combined with the project examples, the thesis discusses the approach of integrated reinforcement of pipe roof and backfilling grouting. The practice has proved the good effect of reinforcement. |
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| Keywords: | tunnel construction shallow-buried and unsymmetrical-pressure the reinforcement of portal section roof side support backfilling grouting |
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