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。
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.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2014年第S2期299-305,共7页
Rock and Soil Mechanics
基金
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)
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
deep long tunnel
tunnel boring machine(TBM) construction
TBM bored pilot and enlarging method
rock mechanics
jamming
