Why is one side of the splayed wall at the mouth of inclined circular pipe culvert higher than the other?

Because this kind of hole shape has good hydraulic conditions, there is not much difference in use, and it has the advantages of small engineering quantity, simple construction and economy, so it is often used as this kind of hole shape.

The splayed wall blocks the fill slope on the two wings of the culvert, and the splayed wall forms an angle with the axis of the culvert, so the water flow is smooth. The wall of the eight-character wall should be made of blocks (pieces) of stone, and can be made of stones or precast concrete blocks when conditions permit. When the topography and water flow conditions require the culvert to cross the route obliquely, an oblique splayed tunnel should be set, either obliquely or obliquely, and the tunnel body should be specially designed.

The regular splayed hole is composed of an inclined splayed wall with an opening angle of 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 center line of the road, it is called a straight wall hole.