| 深埋长隧道TBM施工关键问题探讨 |
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| 引用本文： | 周建军,杨振兴.深埋长隧道TBM施工关键问题探讨[J].岩土力学,2014,35(Z2):299-305. |
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| 作者姓名： | 周建军 杨振兴 |
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| 作者单位： | 1. 中国中铁隧道集团有限公司 盾构及掘进技术国家重点实验室，郑州 450001；2. 中国中铁隧道集团有限公司，河南 洛阳 471009 |
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| 基金项目： | 863计划课题（No. 2012AA041802，No. 2012AA041803）；国家国际科技合作专项（No. 2011DFB71550）；洛阳市应用技术研究与开发资金项目（No. 1301065A）。 |
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| 摘 要： | 针对深埋长隧道开挖所面临的高水压、高地压、高地温、大变形、难支护等问题,分析总结传统钻爆法开挖与支护技术、全断面隧道掘进机(TBM)施工技术、TBM导洞扩挖技术应用中的优劣,TBM导洞扩挖法为深埋长隧道开挖提供了新的设计思路。由于深埋长隧道的建设环境与浅埋隧道建设环境存在显著差异,TBM施工将面临3个关键问题——岩爆问题、卡盾(大变形)问题和未准确探测前方地质而发生的施工事故(涌水、突泥等)。为揭示TBM施工过程中卡盾的存在性,分别针对某一特定地质条件下深埋软、硬岩TBM施工进行理论分析和数值模拟研究。结果表明,软岩地层TBM施工发生卡盾,而硬岩完整地层TBM施工未发生卡盾。
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| 关 键 词： | 深埋长隧道 盾构(TBM)施工 TBM导洞扩挖法 岩石力学 卡盾 |
| 收稿时间： | 2014-03-31 |
Discussion on key issues of TBM construction for long and deep tunnels |
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| ZHOU Jian-jun,YANG Zhen-xing.Discussion on key issues of TBM construction for long and deep tunnels[J].Rock and Soil Mechanics,2014,35(Z2):299-305. |
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| Authors: | ZHOU Jian-jun YANG Zhen-xing |
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| Institution: | 1. State Key Laboratory of Shield Machine and Boring Technology, China Railway Tunnel Group Co., Ltd., Zhengzhou 450001, China; 2. China Railway Tunnel Group Co., Ltd., Luoyang, Henan 471009, China |
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| Abstract: | Aiming at high water-pressure, great ground stress, high ground temperature, large deformation, difficult supporting and other problems in the construction of deep and long tunnels, the superiority and disadvantage of tunnel construction method are conducted, such as drill-blasting method, TBM method, and TBM bored pilot+enlarging method. TBM bored pilot+enlarging method provides a new idea for tunnelling design of deep and long tunnels. Due to the remarkable differences in geological condition between deep tunnels and shallow tunnels, there are three crucial problems for TBM construction, namely, rockburst, TBM jamming (large deformation), and construction accidents (water gush, mud burst, etc.) attributed to inaccurate geological prediction. In order to detect the occurrence of TBM jamming, theoretical analysis and numerical simulation of TBM construction are conducted in deep soft rock and hard rock under certain geological conditions. The results show that the jamming occurs in deep soft rock, but never happens in intact hard rock. |
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| Keywords: | deep long tunnel tunnel boring machine(TBM) construction TBM bored pilot and enlarging method rock mechanics jamming |
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