季冻区隧道冻害风险等级划分及施工处治措施

Risk Classification and Construction Treatment Measures of Tunnel in Seasonal Freezing Area

为提高季冻区公路隧道冻害处治效果,减少冻害施工处治过程中的盲目性,在借鉴已有研究成果的基础上,采用模糊层次分析法建立季冻区隧道冻害风险等级评价体系,给出冻害风险等级和评价标准。并从隧道保温、排水措施方面考虑,提出不同冻害风险等级下隧道冻害施工处治措施。研究结果表明,温度条件和水文条件所占准则层权重最大,冻害处治应充分考虑渗漏水处治和隧道保温内容,提出的隧道冻害施工处治措施与冻害等级关系表可用于指导实际冻害施工处治决策。

In order to improve the treatment effect of highway tunnel freezing damage in seasonal frozen area,and reduce the blindness in the process of construction treatment,based on the existing research results,the fuzzy analytic hierarchy process(FAHP)is used to establish the risk grade evaluation system of tunnel freezing damage in seasonal frozen area,and the freezing damage risk grade and evaluation standard are given.Considering the tunnel insulation and drainage measures,different freezing damage risk levels are proposed,under the condition of tunnel freezing damage treatment measures.The results show that temperature and hydrological conditions account for the largest weight of the criterion layer,and leakage treatment and tunnel insulation should be fully considered in the treatment of freezing damage.The table of relationship between the treatment measures of tunnel freezing damage construction and the freezing damage grade can be used to guide the actual decision-making of freezing damage treatment.