摘要
初始应力场对高地压隧道围岩变形和岩爆分析有着重要的控制作用.采用了目前技术较为成熟的空心包体应变计法,成功测量出高黎贡山隧道的原岩地应力,并将该地应力测试成果应用于隧道岩爆预测数值模型中.有限元计算表明：该隧道埋深在400～480 m时有轻微岩爆发生,埋深大于480 m有中等岩爆发生;拱顶是岩爆的危险区域,施工时需格外注意.计算结果和现场岩爆发生位置具有较好的相似性.最后针对该隧道岩爆状况提出了相应的防治对策.
The initial stress field plays an important role in the control in the High pressure tunnel surrounding rock deformation and rock burst analysis.This paper successfully measured the original rock stress of the tunnel area by CSIRO strain gauge method.And then the test results was applied in the numerical model of tunnel rock burst prediction.Finite element calculations show that：the tunnel depth of 400 to 480 m have a mild rock burst ;depth greater than 480m have a moderate rock burst and the dome is the rock burst danger zone which is need to pay particular attention to the construction.Calculation results and live rock broke the location of the area of Health has a certain similarity,at last proposed prevention measures corresponding for tunnel rock burst.
出处
《公路工程》
北大核心
2013年第5期79-83,共5页
Highway Engineering
基金
湖南省交通科技项目(200928)
湖南省交通科技项目(201161)
关键词
地应力测试
应力解除法
硬质围岩
岩爆
有限元
In-situ Stress Measurement
Stress Relief Meathod
Hard Rock
Rock Burst
FEM
