现行铁道部部标准《铁路桥渡勘测设计规范》(TBJ17—86)表1.0.8注③(《铁路桥涵设计规范》规定与此相同)是这样规定的: “设在水库淹没范围内的桥涵,一般仍采用表列洪水频率标准。设在水坝下游的桥涵,若水库设计洪水频率标准高于桥涵设计洪水频率标准时,一般按表列标准的水库泄洪量加桥坝间的汇水量作为桥涵设计及验算流量;若水库校核洪水频率标准低于桥涵设计洪水频率标准 The existing railway ministry standard “Railway Bridge crossing Survey Design Code” (TBJ17-86) Table 1.0.8 Note ③ (“Railway Bridge Culvert Design Code” same as the provisions) is: "In the submerged area of ​​the bridge and culvert , Generally listed table flood frequency standards are still used.For bridges and culverts located downstream of the dam, if the design flood frequency of the reservoir is higher than the design flood frequency standard of the bridge and culvert, the flood discharge amount of the reservoir in Table And check the flow rate; if the reservoir verification flood frequency standards lower than the bridge design flood frequency standards