發(fā)布時間：2018-03-20 15:42

  本文選題：巖體質(zhì)量　切入點：快速分級　出處：《公路工程》2014年01期 　論文類型：期刊論文

【摘要】：以某高速公路大跨徑隧道為研究對象,在詳細地質(zhì)調(diào)查基礎上,采用BQ圍巖分級和CSIR巖體質(zhì)量分類方法,對該隧道一段圍巖進行快速動態(tài)分級,結(jié)果表明圍巖質(zhì)量應介于Ⅲ級和Ⅳ級之間。采用赤平極射投影和實體比例投影法對本段隧道穩(wěn)定性進行快速圖解分析評價,結(jié)果顯示,拱頂不穩(wěn)定結(jié)構(gòu)體為斜四面椎體,可能塌落的巖體體積最大為44.4 m3。實踐證明在隧道施工中采用地質(zhì)分析法對圍巖質(zhì)量進行動態(tài)分級和評價簡便快捷,收效好。
[Abstract]:On the basis of detailed geological investigation, taking the large-span tunnel of a certain expressway as the research object, the rock mass classification of the first section of the tunnel is carried out by using the classification method of Bq surrounding rock mass and CSIR rock mass quality, and the dynamic classification of the first section of the tunnel is carried out. The results show that the mass of surrounding rock should be between grade 鈪，

本文編號：1639733