包家山隧道洞周湿滑返潮机制及防治对策

Mechanisms and Countermeasures for Tunnel Damping and Slipping: Case Study on Baojiashan Tunnel

为减少由于部分路面出现水汽凝结现象从而影响高速公路行车安全,通过系统的洞内外气象观测及地质分析,对其形成机制进行分析,认为其根本原因是洞外湿热空气进入洞内冷却后"结露"所致,并提出相应的处治意见。

Accidents may occur in highway tunnels when the road surface is damp and slippery.The mechanisms for the damp and slippery road surfaces in tunnels are analyzed on basis of meteorological observations and hydro-geological analysis.It is concluded that the main cause for such phenomenon is the dew produced when moist and hot air outside the tunnel entering the tunnel.Finally,countermeasures are proposed.