| 郑万高铁大断面岩质隧道掌子面稳定性评价及控制措施 |
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| 引用本文： | 刘大刚,姚萌,张霄.郑万高铁大断面岩质隧道掌子面稳定性评价及控制措施[J].隧道建设,2018,38(8):1311-1315. |
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| 作者姓名： | 刘大刚 姚萌 张霄 |
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| 作者单位： | (1. 西南交通大学交通隧道工程教育部重点实验室， 四川 成都 610031； 2. 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： | 中国铁路总公司科技研究开发计划课题（2017G007-F， 2017G007-H） |
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| 摘 要： | 为建立施工阶段大断面隧道掌子面稳定性评价方法，结合郑万高铁大型机械化特点，对郑万高铁湖北段隧道掌子面地质信息进行统计分析，将掌子面稳定性分为A整体稳定、B局部掉块、C上半断面不稳定和D全断面不稳定4个级别，并建立以岩石坚硬程度、岩体完整程度和地下水状态3个指标的掌子面稳定性定性分级方法，得出围岩级别与掌子面稳定性的对应关系。研究结果表明： 1）岩石坚硬程度、岩体完整程度和地下水状态是围岩分级指标中使用率最高的3个指标； 2）Ⅰ、Ⅱ、Ⅲ级围岩的掌子面稳定性为A级。
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| 关 键 词： | 郑万高铁大断面隧道 掌子面稳定性分级 岩石坚硬程度 岩体完整程度 地下水状态 超前支护 |
| 收稿时间： | 2018-04-18 |
| 修稿时间： | 2018-07-21 |
Stability Evaluation and Control Measures for Tunnel Face of Large Cross sectional Tunnel on Zhengzhou Wanzhou High speed Railway |
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| LIU Dagang,YAO Meng,ZHANG Xiao.Stability Evaluation and Control Measures for Tunnel Face of Large Cross sectional Tunnel on Zhengzhou Wanzhou High speed Railway[J].Tunnel Construction,2018,38(8):1311-1315. |
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| Authors: | LIU Dagang YAO Meng ZHANG Xiao |
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| Institution: | (1. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China) |
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| Abstract: | The geological information of the tunnel face on Hubei Section of Zhengzhou Wanzhou High speed Railway is collected and analyzed based on large mechanized construction characteristics; and then the tunnel face stability is divided into four grades, i.e. Grade A (whole stable), Grade B (partial rock falling), Grade C (partial unstable) and Grade D (whole unstable); finally, a classification method for tunnel face stability is established based on three indices of rock hardness, rock integrity and groundwater status, and the relationships between the stability grades and the surrounding rock grades are obtained. The study results show that: (1) The three indices, rock hardness, rock integrity and groundwater status are with the highest utilization rate. (2) The stability of Grade Ⅰ, Ⅱ and Ⅲ surrounding rock belongs to Grade A. |
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| Keywords: | large cross sectional tunnel on Zhengzhou Wanzhou High speed Railway tunnel face stability classification rock hardness rock integrity groundwater status advanced support |
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