rexsteel

Corrugated Steel Pipe

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Construction

1. Excavation

Excavation is carried out based on the excavation regulations stated in the standard specification of Korea Expressway Corporation.
The width of the excavation is as follows.

Nominal pipe size 300 400 450 500 600 700 800 900 1,000 1,200 1,350 1,500 1,800 2,000 2,200 2,400
The width of the excavation(b) 700 900 1,000 1,100 1,200 1,400 1,600 1,700 1,800 2,100 2,300 2,500
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2. Foundation ground

In order to evenly distribute the load acting on the corrugated steel pipe, the following conditions of foundation ground are observed.

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Type of foundation ground Minimum thickness of foundation Width of foundation
900mm or less 900 ~ 2,000mm 2,000mm or more
Normal ground 200mm 300mm 0.2D D
Rock ground 200mm
However, if the fill height exceeds 5 meters, increase by 40mm per 1 meter.
D
Soft ground 500mm 0.4D or 500mm, whichever is greater 0.3D
Up to 1 meter
2D ~ 3D
3. Corrugated steel pipe installation
4. Fill

For the minimum height of fill after the construction, 300 mm or more or D/5 from the bottom of the pavement, whichever is greater, is applied.

5. Compaction