摘要
在进行高水压山岭隧道注浆加固设计时,合理地确定注浆孔深度范围及其孔数是注浆堵水成功与否的关键。采用FLAC3D模拟对水库下方某山岭隧道注浆加固进行了数值模拟分析。对不注浆加固、注浆孔深度及其孔数等不同工况条件下围岩的渗流及塑性区的变化进行分析,并对单一变量进行优化比较。结果表明:未注浆加固情况下,隧道开挖引起拱顶、仰拱大范围围岩屈服破坏,洞周围岩坍塌、涌水突泥等风险较大;28个注浆孔且孔深30 m时较合理。
For grouting reinforcement design of mountain tunnel with high water pressure, the key to the success of blocking water is the reasonable determination of the length and numbers of in- jecting holes.The numerical simulation of grouting reinforcement of some mountain tunnel below the reservoir was carried out with FLAC3D.The changes of seepage and plastic zone in surrounding rocks of the mountain tunnel under the conditions of tunnel con- struction without grouting, the different length and number of in- jecting holes were analyzed, and comparison and optimization of single variable were made. The results indicated that under the condition of tunnel construction withQut grouting, due to the yield failure of surrounding rocks on inverted arches and vaults caused by tunnel excavation, there is higher risk of surrounding rock collapse,water burst and mud inflow. Such parameters of injecting hole as 28 injecting holes and the hole length 30 m are reasona- ble.
出处
《矿业研究与开发》
CAS
北大核心
2013年第4期33-36,共4页
Mining Research and Development
基金
国家自然科学基金资助项目(50878213)
关键词
山岭隧道
高水压
注浆加固
参数优化
数值模拟
Mountain tunnel, High water pressure, Grouting re- inforcement, Parameter optimization, Numerical simulation
