Extension:
Circular tube culvert: it is the most commonly used culvert structure type in rural highway subgrade drainage. It not only has good mechanical properties, but also has simple structure, convenient construction, short construction period and low cost. Reinforced concrete circular culvert is the most common one.
Circular pipe culvert consists of two parts: the hole body and the mouth of the cave. The tunnel body is the main body of the water passage, which is mainly composed of pipe body, foundation and joint. The entrance of the cave is the connection part of the tunnel body, subgrade and water flow, which mainly has two forms: splayed wall and straight wall.
The pipe body of circular pipe culvert usually adopts reinforced concrete, and the pipe diameters are generally 0.5m, 0.75m, 1m, 1.25m,1.5m. The pipe diameters are selected according to the drainage requirements, and prefabricated installation is mostly adopted, and the prefabricated length is generally 2m. When the pipe diameter is 0.5 m or 0.75 m, single-layer reinforcement shall be used, and when the aperture is above 1 m and 1 m, the wall thickness shall be not less than 6 cm when the pipe diameter is 0.5 m, not less than 8 cm when the pipe diameter is 0.75 m, and not less than 10 cm when the pipe diameter is125m. ..