下承式预应力混凝土铁路桥梁是一种新型的桥梁结构,具有大大减小建筑高度,减小噪音等一系列优点,是城市立交的一种有效形式.该种桥梁由两片主梁及支承在主梁下部的道床板组成.列车则在主梁之间通过.因此要求两主梁之间的距离相当宽,双线桥梁道床板宽达10米.所以下承式预应力混凝土梁属于槽型“宽 Through the prestressed concrete railway bridge is a new type of bridge structure, with greatly reducing the building height, reducing noise and a series of advantages, is an effective form of urban interchange.This kind of bridge consists of two beams and support In the lower part of the main girder composed of railroad bed trains pass between the main girder.Therefore, the distance between the two main girders is required to be quite wide, double-girder bridge deck bed width of up to 10 meters.Therefore, under the prestressed concrete girder belongs to the groove Type "wide