铁路经过城市附近,为了交通方便,经常要修立交桥(多数是铁路跨越公路或街道)。一般情况是把铁路线提高8米左右。立交桥两端各有相当长的一段引线,既可采用填土路堤,又可采用各种不同类型、孔径、长度的旱桥。对于这个问题往往看法不同,议论纷纷。 The railway passes near the city and often has overpasses (mostly railways or highways) for traffic convenience. The general situation is to raise the railway line about 8 meters. Overpass each have a very long section of the lead, either fill the embankment, but also can use a variety of different types, aperture, length of the dry bridge. Often different views on this issue, talk about each other.