PRODUCTION ANALYSIS OF CUT-AND-COVER TRENCH CONSTRUCTION
During the 1961 and 1962 summer test seasons at Camp Century, Greenland, a 1600-ft-long trench containing horizontal curves was constructed. A total of 105 hr 45 min of Peter-plow machine time was required for the cutting operation. The overall cutting production, including spoil cuts, was 466 cu yd...
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| Format: | Text |
| Language: | English |
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1964
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| Online Access: | http://www.dtic.mil/docs/citations/AD0613266 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0613266 |
| Summary: | During the 1961 and 1962 summer test seasons at Camp Century, Greenland, a 1600-ft-long trench containing horizontal curves was constructed. A total of 105 hr 45 min of Peter-plow machine time was required for the cutting operation. The overall cutting production, including spoil cuts, was 466 cu yd/hr cu or 166 tons/hr of snow excavated. The trench-cut average was 359 yd cu/hr or 134 tons/hr. The trench-covering operation required an additional 16 Peter-plow-hr and a total of 290 man-hr for the arch installation, a rate of 5.5 ft of roof per man-hr, or, using a five-man crew, a rate of approximately 27.5 ft/hr. The arch removing required approximately 27% of the installation time. Fuel (diesel oil) consumption was at a rate of 14.9 tons of snow excavated per gallon of fuel, or approximately 2.2 ft of trench per gallon. The trench-floor processing (400-ft length) required 2 1/2 hr, a rate of 160 ft of floor per hr, and the leveling (1600-ft length) required 4 hr, a rate of 400 ft/hr. A total of 176 man-hr was required to install the electrical system and exhaust fans. The production factor for cutting a straight trench was between 1.3 and 1.4 times that of a curved trench. (Author) |
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