The Study On The Risk Analysis And Prevention And Control Technology Of Highway Tunnel Lining Disease On Active Duty

In recent years, with the rapid development of Ningbo highway construction, highwaytunnel is increasing, not only requires the calculation theory of precise and advancedconstruction technology, but also on the tunnel after the completion of the maintenance ofsecurity put forward higher requirements. The operation conditions of the original design ofthe tunnel structure is increasingly unable to meet operational requirements, increase theunsafe factors, in order to ensure the operation safety of the tunnel, we take the detection andevaluation of the necessary analysis of Ningbo system in the type of tunnel lining of existinghighway, draws the following conclusion:1. With the increase of the length of the tunnel lining crack, health value decreased, archnode stress value increases, on the stability of the tunnel is bigger threat.2. When the crack length exceeds the limit, can cause serious damage to the tunnelstructure, it would be dangerous to pedestrians, traffic safety measures, should be taken asearly as possible.3. When the crack length change value is same, the crack location of tunnel liningsection arch stress influence degree from large to small is as follows: the arch, arch, archwaist unilateral bilateral, unilateral, bilateral arch foot arch waist.4. Influence of stress cracks of tunnel vault at a node in the vault area is far greater thanin arch waist, arch foot position crack.