西安市的西三环北段道路是沿汉长安城西城墙外的(氵皂)河(古称泬水)故道修建的,在跨越陇海铁路时,其主干道为高架桥,东西两侧的辅道则以涵洞形式从铁道下方穿过,在辅道涵洞施工中,发现了两处古桥遗址。 The northern section of the West Third Ring Road in Xi’an is built along the old course of the ancient soapstone river outside the west wall of the Chang’an City. When crossing the Longhai Railway, the main road is an viaduct, and the auxiliary roads on the east and west sides Then culverts from the bottom of the railway through the pass, secondary road culvert construction, found two ancient bridge ruins.