摘要
由于地质条件的复杂多变以及勘察方法和技术缺陷等原因,导致在勘察设计阶段的公路隧道围岩分级与实际施工阶段的围岩分级差异很大,应该寻求动态的对公路隧道围岩分级进行描述的定量评价方法,以确保隧道围岩和支护结构体系在施工和运行过程中的稳定性。通过对走马岭隧道现场进行详细地质调查,采用多变量分析法对走马岭隧道围岩进行了动态分级。结果表明,隧道施工阶段围岩分级结果与原来勘查设计部门的结果有较大出入;隧道施工阶段围岩分级结果更加真实,正确反映了围岩的稳定性。
Numerous differences exist between the classification results in the investigation and design phases and those observed during construction. Complex geological conditions, inadequate investigative methods and technological limitations cause most of these differences. A quantitative assessment method for surrounding rock dynamic classification is introduced in order to assure stability in the surrounding rock and the supporting structures during construction and operation. A dynamic classification method based on the detailed geological investigation was used in the Zoumaling, Chongqing, China tunnel construction. The classification results show that the classification errors in the investigation and design phases are great. It also shows that the classification results in the construction phase accurately reflect the stability of surrounding rock.
出处
《重庆建筑大学学报》
EI
CSCD
北大核心
2007年第6期76-79,共4页
Journal of Chongqing Jianzhu University
关键词
公路隧道
围岩分级
动态分级
highway tunnel
surrounding rock classification
dynamic classification
