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- W9764865 abstract "Culvert pipes not only are placed to drain water but are required to carry bed load materials including rocks. The flow and energy characteristics of bed load materials and their effect on culvert pipes are not well understood. Analysis of mechanics can provide a format for comparing predicted characteristics with field experience data, and results confirm the validity of the assumptions. In 1968, an initial study was reported on 229 aluminum culverts that had been exposed to abrasion for from 4 to 7 years. That study proposed a form of energy level for bed load materials and rated the abrasion performance of aluminum culvert through a series of energy ratings. The energy level and abrasion predictions were compared with actual field experience, and long-term culvert abrasion can be predicted when culvert geometry, installation arrangement, and content of bed load materials are established. In 1984 and 1985 the field experience of the originally reported culvert group averaged 20 years of exposure to abrasion. In this paper are presented the results of the 1984-1985 study. The basic method of determining abrasion energy levels has been retained and simplified to emphasize key variables that affect abrasion. The 1985 study indicates that abrasion of aluminum culvert follows the patterns of the previous work. Long-life abrasion typically does not continue at a linear wastage rate but levels off to a much reduced rate, reflecting reductions in total energy as the flow channel stabilizes with age. Abrasion and service life for aluminum culvert inverts may be predicted as a function of water flow, culvert entrance arrangement, culvert slope, and rock content of streambed load." @default.
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- W9764865 date "1986-01-01" @default.
- W9764865 modified "2023-09-26" @default.
- W9764865 title "ABRASION RESISTANCE OF ALUMINUM CULVERT BASED ON LONG-TERM FIELD PERFORMANCE" @default.
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