公路、铁路穿过河流时多设置桥渡(桥梁与引道)跨越.桥渡作为交通运输建筑物,要满足运输载重的要求;它与水流相互作用时又是水工建筑物,所以还须考虑在水流作用下的安全. 桥渡调治建筑物是修建在桥位及其上下游附近河段上的稳定桥位河段,使桥孔通畅排水输沙,保证桥渡安全运用的治河建筑物.它的布设是一个十分复杂的问题,与河段的水流和 Roads and railroads crossing the river should be set up with more bridges (bridges and approach roads) .As a transportation structure, the bridge crossing needs to meet the requirements of transportation load. When it interacts with the water flow, it is also a hydraulic structure, so it must be Considering the safety under the action of water flow, the bridge crossing regulation building is a stable bridge located at the bridge and upstream and downstream reaches of the river, allowing the bridge hole to discharge water and sediment smoothly to ensure the safe use of the bridge crossing the river building Its layout is a very complex issue, with the flow of water and river