摘要
《JTGD70-2004公路隧道设计规范》采用了国标《GB50218-94工程岩体分级标准》的围岩分级方法进行隧道围岩分级。新规范实施后,很多建设业主反应采用新规范的隧道围岩分级普遍偏高,致使工程造价普遍增加。文章对围岩分级和原围岩分类进行了比较,对围岩分级的定性与定量数据进行了对比分析,阐明了出现这一现象的原因,提出了准确使用新规范围岩分级方法的几点建议。
＂Code for Design of Road Tunnels＂ （JTGD70-2004） adopted the new classification system of surrounding rocks according to ＂Standard for Engineering Classification of Rock Masses＂ （GB50218-94）. Along with the use of the new classification system, complaints have been arisen from some constructors that the construction costs have been becoming higher. Through contrast and analysis, the article explains the causes of this phenomenon and puts forward some useful advices for implementing the new code.
出处
《现代隧道技术》
EI
北大核心
2009年第5期51-54,60,共5页
Modern Tunnelling Technology
关键词
公路隧道
围岩分级
存在问题
Road tunnel
Classification of surrounding rocks
Existing problems
