When the steel plate is corrugated, the use changes!

When a roll of steel is flattened, we see it is still soft, but when pressed into a tile shape, the steel sheet of the same length will be deformed and bent by its own weight, but the tile will not be. This is because its cross-sectional inertia moment becomes larger and the load capacity Increased several times, this is like folding a fan with paper when you were a child. Color steel tiles are one of the applications.

If this structural feature is made into steel pipes, it becomes a very practical construction material in the construction of highway culverts, that is:

However, the use of bellows alone is not very load-bearing. For example, in the following picture, a small-diameter bellows is easy to step on one foot, and it will be different if there are other objects around.

The bellows are used for roads, bridges and culverts. In fact, they are not surrounded by a special object as shown in the above figure. It only needs to fill the roadbed with soil around the bellows.

The stress principle of the bellows-type culvert is that the pipe body and the surrounding backfill soil are jointly stressed to form a pipe-soil effect. This kind of structure is inexpensive, at least for field operations, the soil should be free of money.