There are several methods for the entrance of inclined splayed wall of culvert.

When the culvert crosses the route obliquely, there are two methods: oblique crossing: the direction of the cover stone at the entrance is parallel to the direction of the route; Inclined forward construction: the direction of the cap stone at the entrance is perpendicular to the culvert axis. (1), oblique.

When φ < θ, it is called anti-wing wall, and β = θ-φ = 0 is the most economical; When φ > θ, it is called wing wall, and β = θ+φ ≤ 60. (2) Inclined forward construction.

Generally, the wing wall being drilled adopts a positive wing wall, the long wing wall is called a large wing wall, and the short wing wall is called a small wing wall. The smaller β is, the more economical the winglet wall is, and β = φ is the most economical.

The end wall and cap stone can be designed as slope or step.