Falling sill and impact reduction facilities
Falling sill should be set at the mountain and water inlet, and sometimes falling sill wells (shafts) and other facilities for reducing scour, preventing scour and dissipating energy should be set at the water inlet.
Ensure smooth water flow
The entrance and exit of culvert should be smoothly connected with subgrade to ensure smooth water flow, so that the upstream and downstream riverbeds, tunnel foundation and subgrade near the tunnel will not be washed away, so as to ensure the safety of tunnel body and form good drainage conditions.
Dongkou building
The entrance building is located at both ends of the culvert and has two structural forms: one-character and eight-character.
fundamental form
There are two forms of foundation: integral and non-integral.
Accessory project
Auxiliary works of culvert include cone slope protection, river bed paving, subgrade slope paving and artificial waterway.