万州长江公路大桥防撞设施工程通航论证*

三峡水库175 m蓄水后,万州长江公路大桥两端部分拱圈及立柱被淹没。一旦船舶失控或走偏航道碰撞拱圈和立柱,极易导致拱桥垮塌,引发极为恶劣的安全事故。针对大桥现状,创新提出了弧形水上升降式桥梁防撞装置,该装置能对拱桥易撞部位进行区域式防护,并能随水位变化而自动升降。主要通过物理模型试验并结合相关数值模拟分析拟建防撞工程建成后对桥区河段河床演变、通航净空尺度、通航水流条件以及船舶航行条件等的影响。

Navigation argument on anti-collision device of Wanzhou Yangtze River road bridge

After the Three Gorges Reservoir storages water to 175 m,part of the arch ring of Wanzhou Yangtze River road bridge is submerged.Once the ship is out of control or goes off the channel and then collides with the arch ring,the arch bridge is easily to collapse and thus leads to accidents.Based on the current situation of the bridge,we propose arch-shape waterborne up & down anti-collision facility which will raise and fall automatically with variation of water stage.The impact of the anti-collision device on bed evolution,navigation clearance dimensiona,navigation current condition,as well as vessels’navigation condition is analyzed by physical model test and numerical simulation.