高速公路隧道衬砌掉块、脱空及欠厚的关系与处治措施

The Relationship Between Falling Blocks, Emptying and Underthickness of Expressway Tunnel Lining and the Treatment Measures

以甬台温高速公路宁波二期段麻岙岭隧道工程为依托,在对隧道衬砌病害调研的基础上,采用理论分析并结合数值计算方法,对高速公路隧道衬砌病害产生的原因及其相应的治理措施进行研究。结果表明:拱肩欠厚、拱肩脱空情况下二次衬砌结构承载能力安全储备不能满足规范要求;衬砌背后空洞、衬砌结构裂损和渗漏水病害三者相互影响。

Taking Ma'aoling Tunnel project of Ningbo Phase Ⅱ of Yongtai-Wenzhou Expressway as an example, based on the investigation of tunnel lining diseases, theoretical analysis and numerical calculation were used to study the causes of tunnel lining diseases and their corresponding treatment measures. The results show that: the bearing capacity safety reserve of secondary lining structure can not meet the requirements of the code under the condition of underthick spandrel and empty spandrel. The cavity behind the lining, the lining structure fracture and the water leakage are affected by each other.