Accession Number:

AD0613266

Title:

PRODUCTION ANALYSIS OF CUT-AND-COVER TRENCH CONSTRUCTION,

Descriptive Note:

Corporate Author:

COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s):

Report Date:

1964-08-01

Pagination or Media Count:

21.0

Abstract:

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 ydhr cu or 166 tonshr of snow excavated. The trench-cut average was 359 yd cuhr or 134 tonshr. 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 fthr. 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 12 hr, a rate of 160 ft of floor per hr, and the leveling 1600-ft length required 4 hr, a rate of 400 fthr. 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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Distribution Statement:

APPROVED FOR PUBLIC RELEASE