大跨径隧道围岩的快速分级与稳定性图解分析

发布时间：2018-03-20 15:42

  本文选题：岩体质量　切入点：快速分级　出处：《公路工程》2014年01期 　论文类型：期刊论文

【摘要】：以某高速公路大跨径隧道为研究对象,在详细地质调查基础上,采用BQ围岩分级和CSIR岩体质量分类方法,对该隧道一段围岩进行快速动态分级,结果表明围岩质量应介于Ⅲ级和Ⅳ级之间。采用赤平极射投影和实体比例投影法对本段隧道稳定性进行快速图解分析评价,结果显示,拱顶不稳定结构体为斜四面椎体,可能塌落的岩体体积最大为44.4 m3。实践证明在隧道施工中采用地质分析法对围岩质量进行动态分级和评价简便快捷,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，

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