Introduction:
The most famous type of culvert pipe is assembled corrugated culvert pipe which is also called Multi-plate Corrugated steel pipe (CSP), corrugated metal pipe (CMP), or nestable pipe are combined by lots of segments which are assembled by more than two galvanized steel arch sheets connected by bolts and nuts. The parts can be economically and easily transported while it can be easily and quickly assembled at work site. Construction and sectional materials can be carried out separately, thus normal materials can be reduced or totally abandoned, which shorten the working period and also protect the environment. The structure of assembly corrugated pipes bears a rational force, and the load of power is distributed. Also the pipes’ non-deformability is very well. It is a solution to the damage to the culvert from frost. The road surface above the culvert pipes is very plain, and thus improves the comfortableness of car. These pipes avail to improving the structure of the soft