1, for the corrugated steel culvert structure, inevitably corroded the threat of the life cycle of Expressway on the embankment and culvert are higher, so we must consider the anticorrosion maintenance, should be carefully used in road maintenance management difficulties.
2, debris flow fan or sand discharge volume, high velocity section.
3, high fill road. The high fill section should be calculated and analyzed according to the construction technology and the different soil arching effects after the construction, so as to ensure the safety of the culvert force.
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