跨江隧道洞口减光棚配置方案分析研究

Analysis and Study of the Configuration Scheme of Light-reducing Shed at the Entrance of River-crossing Tunnel

跨海隧道出入口光线亮度差异是导致其洞口发生交通事故的最主要因素之一。以深圳至中山跨江隧道实例,采用设置减光棚的方式建立隧道洞口亮度过渡段,以降低隧道洞口交通事故率。主要拟选用格栅减光棚和封闭式“透光板”减光棚两种形式,并分别对其进行了效能分析,对两种不同的形式做出了方案比选,然后结合相应路面阳光分布的数值模拟结果,总结出透光板减光棚具有更优秀的减光效益,更符合跨海隧道进出口的减光要求,最后根据透光板减光棚的缺陷提出一些优化方案,研究结果可为深海隧道出入口减光设计提供参考。

The difference in light intensity at the entrance and exit of a sea-crossing tunnel is one of the most important factors that cause traffic accidents at the entrance of the tunnel. In the paper, relying on the Shenzhen-Zhongshan River Crossing Tunnel project, the transition section of the tunnel entrance adopts the light reduction shed to reduce the traffic accident rate at the tunnel entrance. Two type of schemes are selected, which are grid light reduction shed and closed "transmitting plate" light reduction shed, and their effectiveness are compared respectively. Then combined with the numerical simulation results of the sunlight distribution on the corresponding road surface, it is concluded that the light-transmitting plate light-reducing shed has better light-reducing benefits, and it is more in line with the light-reduction requirements of the entrance and exit of the cross-sea tunnel. Finally, some optimization schemes are proposed based on the defects of the light-emitting plate light-reducing shed. The research results can provide a reference for the light reduction design of the entrance and exit of the deep sea tunnel.