Accession Number : AD0430148
Title : CAMP CENTURY MOVEMENT RECORD.
Descriptive Note : Rept. for Oct 60-May 62,
Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Personal Author(s) : Waterhouse,R. W. ; Tobiasson,Wayne N. ; Scott,Barratt G.
Report Date : MAY 1963
Pagination or Media Count : 89
Abstract : Snow deformatio studies are being made in the undersnow facilities at Camp Century on the N. Greenland Ice Cap to define the 'useful life' of such facilities. The initial measurements were made in Aug. 1959 and since then cross section measurement stations, settlement recording Helipots (helical potentiometers), and a camp bench mark system have been installed. Results through May 1962 are presented. Twenty-nine Helipots, installed on structures within the tunnels, record movement between the structure and the tunnel arch or floor. The horizontal and vertical distances between wooden pegs set in the tunnel walls at 19 stations to determine profile variations in the tunnel cross sections are measured periodically with a steel tape. Grid lines were painted on several side tunnel portals of various sizes and shapes and will be photographed periodically to determine patterns of deformation. The various Helipot installations are diagrammed and the relative movements recorded by each are graphed. The 19 tunnel cross sections being studied are also diagrammed and rates of closure at each station graphed, and the elevation variations of the bench marks with time are tabulated. (Author)
Descriptors : (*SNOW, MECHANICAL PROPERTIES), (*STRUCTURES, SNOW), MOTION, MEASUREMENT, DEFORMATION, POLAR REGIONS
Distribution Statement : APPROVED FOR PUBLIC RELEASE