混凝土四铰管是一种新型涵管。由于管身有铰的作用,充分利用了管侧填土的被动土压力来平衡管顶荷载,从而大大地改善了四铰管的受力条件,使它承受的弯矩远比无铰管的弯矩为小。因此,四铰管可以用较薄管壁的素混凝土作成,显著地减少 Concrete four hinge pipe is a new type of culvert. Due to the hinge effect of the pipe body, the passive earth pressure on the pipe side is fully utilized to balance the load on the top of the pipe, thereby greatly improving the stress conditions of the four-legged pipe so that the bending moment it receives is far more than that of the non- Bending moment is small. Therefore, the four-legged tube can be made of thinner concrete wall concrete, significantly reduced