You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Load Development on a Buried Rigid Conduit
J. Scott Griffith and Chester A. Keeney
Journal (Water Pollution Control Federation)
Vol. 44, No. 9, Annual Conference Issue (Sep., 1972), pp. 1713-1717
Published by: Water Environment Federation
Stable URL: http://www.jstor.org/stable/25037600
Page Count: 5
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
The loads imposed on an 8-in. (20.2-cm) rigid pipeline 12 ft (3.7 m) in uncompacted backfill have been measured for 6 yr with strain gauge load cells. During the first saturation of the backfill after installation, the load decreased from 1,500 to 725 plf (2,240 to 1,080 kg/lin m), then increased to 1,700 plf (2,530 kg/lin m) even though the rain continued. After the second saturation period, the line had a net increase of about 300 plf (450 kg/lin m). The greatest rate of load increase occurred during the first year, and a smaller but regular annual increase has continued with superimposed seasonal variations. After 6 yr, the loads are approximately equal to the maximum predicted by Marston's load formula for positive projecting conduit conditions, and the experiment is continuing.
Journal (Water Pollution Control Federation) © 1972 Water Environment Federation