What is bridge building? There are many factors that engineering engineers should consider.

Bridge construction is a complex project, and there are many factors to consider.

Bridges refer to buildings built for roads to cross natural or man-made obstacles. Generally speaking, a bridge consists of five main parts and five secondary parts. The five components refer to the superstructure and substructure of the bridge span which bear the transportation load of automobiles or other vehicles, and are the guarantee of the safety of the bridge structure. Comprises a bridge span structure, a supporting system, piers, abutments and abutment foundations. Five small components refer to the components directly related to the bridge service function, formerly known as bridge deck structure.

Culverts are channels where roads or railways intersect with ditches, so that water can flow under the roads. They have the same function as bridges, but usually have smaller apertures and shapes, such as pipes, boxes and arches. In addition, the culvert is also a cave-type water conservancy facility with a gate to adjust the water volume. It usually consists of two parts: the cave body and the cave entrance building.

Culvert:

Circular pipe culvert: Circular pipe culvert consists of two parts: the hole body and the hole. 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, double-layer reinforcement shall be used. The pipe wall thickness is 0.5 m, the pipe diameter is not less than 6 cm, the pipe diameter is not less than 8 cm, and the pipe diameter of 1 m is not less than 10 cm.