| 超浅覆大断面暗挖隧道下穿富水河道施工风险分析及控制研究 |
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| 引用本文： | 石钰锋,阳军生,邵华平,龙云,杨峰.超浅覆大断面暗挖隧道下穿富水河道施工风险分析及控制研究[J].岩土力学,2012,33(Z2):229-234. |
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| 作者姓名： | 石钰锋 阳军生 邵华平 龙云 杨峰 |
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| 作者单位： | 1. 中南大学 土木工程学院，长沙 410075；2. 广州铁路集团公司，广州 510600 |
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| 基金项目： | 铁道部科技研究开发计划重点课题资助(No.2009G009-C);湖南省创新选题资助(No.CX2011B097);中南大学优博扶持项目资助(No.2011ybzj032) |
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| 摘 要： | 以广－珠铁路江门隧道下穿富水河道段为依托，针对其超浅覆、大断面、富水等特点，对超浅覆大断面暗挖隧道下穿富水河道的风险源进行系统分析，阐述风险产生的原因及造成的危害。在对可能采用的预加固手段及开挖方案进行初步比选后，采用三维数值模拟手段进一步量化比选，提出在地表隔水措施基础上，采用水平旋喷与大管棚复合超前支护并结合三台阶法开挖方案。研究表明，该方案能有效止水并加固地层，有效规避塌方风险，保证隧道施工安全的同时，加快施工进度及降低造价，可为类似工程提供参考。
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| 关 键 词： | 超浅覆 大断面 富水隧道 水平旋喷 |
| 收稿时间： | 2012-02-29 |
Risk analysis and control study of super-shallow tunnel with large cross-section under water-rich channel |
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| SHI Yu-feng,YANG Jun-sheng,SHAO Hua-ping,LONG Yun,YANG Feng.Risk analysis and control study of super-shallow tunnel with large cross-section under water-rich channel[J].Rock and Soil Mechanics,2012,33(Z2):229-234. |
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| Authors: | SHI Yu-feng YANG Jun-sheng SHAO Hua-ping LONG Yun YANG Feng |
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| Institution: | 1. School of Civil Engineering, Central South University, Changsha 410075, China; 2. Guangzhou Railway Group Corporation, Guangzhou 510600, China |
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| Abstract: | Based on the fact that Jiangmen Tunnel of Guangzhou-Zhuhai Railway under water-rich channel has characters of super-shallow, large cross-section and water-rich, this paper aims to propose a systematic analysis of the risks of the super-shallow tunnel with large cross-section under water-rich channel and to elaborate reasons for these risks and their potential detriments. After the initial comparison of possible pre-reinforcement means and excavation schemes, a quantitative comparison and selection is further conducted by using three-dimensional numerical simulation approach. It suggests that with the precondition of taking surface water-resisting measures, the excavation scheme in the combination of horizontal jet-grouting and large pipe roof advanced support and 3-bench method should be applied. As is suggested in the research, this scheme is not only effective to waterproof and reinforcing the stratum, but also has its advantages to eliminate the risks of collapse, accelerate the construction progress and reduce the cost at the same time on the prerequisite of ensuring the safety of tunnel construction, so as to provide some references for other similar projects. |
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| Keywords: | super-shallow large cross-section water-rich channel horizontal jet-grouting |
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