The role of the splayed wall of the bridge

The two wings of the culvert are filled with slopes.

The splayed wall and the axis of the culvert are at an angle, allowing smooth water flow. The wall body of the splayed wall should be built with pieces of stone. If conditions permit, it can be veneered with stone or concrete prefabricated blocks.

As the name implies, the eight-character wall means two walls shaped like a figure eight. In culvert construction, it is the two side walls of the entrance and exit of the hole, a form of opening. In ancient buildings, there should be two walls in the shape of eight characters on both sides of the entrance of ancient large houses or government offices, usually with slogans or couplets written on them.