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2011年12期
| 標(biāo)題 |
| 高地應(yīng)力軟巖隧道超前導(dǎo)洞法施工圍巖變形預(yù)釋放規(guī)律分析(51卷) |
| 英文標(biāo)題 |
| Analysis of preparatory release regularity for surrounding rock deformation in construction of advanced drift of soft rock tunnel in high primary stress region |
| 摘要 |
| 為解決高地應(yīng)力軟巖隧道大變形問題，在正洞開挖前先開挖超前導(dǎo)洞，通過超前導(dǎo)洞的位移釋放部分初始應(yīng)力，從而減少正洞擴(kuò)挖后的支護(hù)變形和降低作用在支護(hù)結(jié)構(gòu)上的壓力。本文引入釋放率概念，通過對超前導(dǎo)洞的不同尺寸、位置等條件下圍巖變形預(yù)釋放規(guī)律的數(shù)值分析和研究，提出了具有較好釋放效果的合理參數(shù)組合。 |
| 作者 |
| 新聞作者:郭小雄，劉艷青，馬偉斌 |
| 關(guān)鍵字 |
