河网化地区,排水河渠、灌溉渠道纵横交织,排水河渠的水面低于地面,灌溉渠道的水面又高于地面,为了引水灌溉被排水河渠割开了的农田,必须兴建渡槽;又为了便利行人、车辆跨越排水河渠,还必须修建桥梁。十字双曲拱“桥槽”就是在排水河渠交叉处建起来的通车通水双用、把“双曲拱桥”和“拱板渡槽”合成一体的建筑物,实际上是一座没有完全主拱波的双曲拱桥和不要文墩的悬浮拱板渡槽。图1是 River network area, drains, irrigation channels criss-cross, drains of water is lower than the surface of the ground, irrigation channels and the surface of the water is higher than the ground, in order to divert irrigation by drainage ditches open farmland, the aqueduct must be built; and to facilitate pedestrians , Vehicles across the drainage canal, you must also build bridges. Cross double arch “bridge slot” is built at the intersection of drainage canal traffic through dual-use, the “double curved arch” and “arch aqueduct” integrated building, in fact, is not a complete main arch wave Hyperbolic arch bridge and unfinished suspended arch aqueduct. Figure 1 is