摘要
为在施工前预防隧道塌方,优化隧道设计,以卧龙岗隧道施工塌方风险为研究对象,对隧道初期支护进行了安全性分析,明晰了诱发隧道塌方的风险因素,结合隧道工程地质情况辨识了风险源,采用层次分析法对风险源进行了重要性排序,通过专家调查法对塌方风险发生的概率等级和风险损失等级进行了调查统计,并运用风险矩阵法确定了塌方风险等级。分析结果表明:初期支护及时封闭、临时支撑拆除时机、二次衬砌紧跟与爆破震动是塌方发生重要诱因,卧龙岗隧道塌方风险等级为Ⅲ级,风险等级较高。
In order to prevent tunnel collapse and optimize tunnel design before tunnel construction,the collapse risk of Wolonggang Tunnel was taken as research object,the safety of tunnel primary shoring was analyzed,the risk factors of tunnel collapse were cleared,risk sources were identified combined with tunnel geology conditions,and analytic hierarchy process was used to rank the importantces of risk resources.The probability grades and risk loss grades were confirmed through expert investigation,and the grades of collapse risk were given by using risk matrix technique.Analysis result indicates that tunnel collapse inducements include the prompt closing of primary shoring,the removing occasion of temporary timbering,the close following of secondary lining and blasting concussion.The collapse risk grade of Wolonggang Tunnel is grade Ⅲ and is higher.6 tabs,5 figs,9 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2010年第4期34-38,共5页
Journal of Traffic and Transportation Engineering
基金
国家自然科学基金项目(50879068)
关键词
隧道施工
塌方风险源
风险等级
安全评估
控制措施
tunnel construction
collapse risk source
risk grade
safety evaluation
control measure
