The positive splayed hole of the splayed wall of culvert is composed of splayed walls, the opening angle should be 30, and the left and right wing walls are symmetrical. It is suitable for the situation that the river ditch is straight, there is no obvious groove, and the height difference between the bottom of the ditch and the bottom of the culvert changes little.
When the splayed wall is perpendicular to the road centerline, it is called a straight wall hole; It is suitable for the case that the span of culvert is basically the same as the width of ditch, and it is not necessary to collect and diffuse water flow or only to dredge farmland on both sides for irrigation. The wall of the splayed wall should be built with blocks (pieces) of stone, and stones or precast concrete blocks can be used when conditions permit.
When the topography and water flow conditions require the culvert to cross the route obliquely, an oblique splayed tunnel should be made, which can be oblique or oblique, and the tunnel body building should be specially designed.
For more information about bid writing and improving the winning rate, click on the bottom customer service for free consultation.