Measurement Of Frost Heaving Forces On Piles PDF Download
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Author | : Jerome B. Johnson |
Publisher | : |
Total Pages | : 64 |
Release | : 1988 |
Genre | : Frost heaving |
ISBN | : |
Download Measurement of Frost Heave Forces on H-piles and Pipe Piles Book in PDF, ePub and Kindle
The magnitude and variation of forces and shear stresses, caused by frost heaving in Fairbanks silt and the adfreeze effects of a surface ice layer and a gravel layer, were determined as a function of depth by using electric strain gauges along the upper 2.75 m of a pop pile, 30.5-cm I.D. x 0.95-cm wall, and an H-pile, 25.4-cm web x 85 kg/lineal m. The peak frost heaving forces on the H-pile for three consecutive winter seasons (1982-1985) were 752,790 and 802 kN, respectively. Peak frost heaving forces on the pipe pile of 1118 and 1115 kN were determined only for the second and third winter seasons. Maximum average shear stresses acting on the H-pile were 256,348 and 308 kPa during the three winter seasons. Maximum average shear stresses acting on the pipe pile were 627 and 972 kPa for the second and third winter seasons. Ice collars were placed around the tops of both piles during the first and third winter seasons to measure the adfreeze effects of a surface ice layer. The ice layer may have contributed 15 to 20% of the peak forces measured on the piles. A 0.6-m-thick gravel layer replaced the soil around the tops of both piles for the second and third winter seasons to measure the adfreeze effects of a gravel backfill. The gravel layer on the H-pile may have contributed about 35% of the peak forces measured. Maximum heaving forces and shear stresses occurred during periods of maximum cold and soil surface heave magnitude. These were not related to the depth of frost penetration for most of the winter since forst was present at all depths extending to the permafrost table. (mjm).
Author | : Frederick E. Crory |
Publisher | : |
Total Pages | : 31 |
Release | : 1965 |
Genre | : Frost heaving |
ISBN | : |
Download Measurement of Frost Heaving Forces on Piles Book in PDF, ePub and Kindle
This report summarizes the results of frost heave force measurements on creosoted timber and steel pipe piles during the period 1956-1959 and during the 1962-1963 freezing season. The results indicate that, for the types and sizes of piles used, the heaving forces generated on piling during the seasonal freezing of frost susceptible soils may attain, or even surpass, 50,000 lb. It is also concluded that for conditions represented by these tests the maximum rate of heave occurs early in the winter months at relatively shallow depths (2-3 ft), and that the maximum pile heave force occurs during periods of active frost penetration with very cold near-surface ground temperatures. Near maximum heave forces were also produced after complete freezeback of the seasonal thaw zone during periods of extreme cold.
Author | : |
Publisher | : |
Total Pages | : 588 |
Release | : 1988 |
Genre | : Cold regions |
ISBN | : |
Download CRREL Report Book in PDF, ePub and Kindle
Author | : N. I. Saltykov |
Publisher | : |
Total Pages | : 36 |
Release | : 1944 |
Genre | : Foundations |
ISBN | : |
Download Calculating Frost-heaving Forces on Foundations Book in PDF, ePub and Kindle
Author | : Troy Lewis Péwé |
Publisher | : |
Total Pages | : 90 |
Release | : 1963 |
Genre | : Frozen ground |
ISBN | : |
Download Frost Heaving of Piles with an Example from Fairbanks, Alaska Book in PDF, ePub and Kindle
A review of the principles of ice growth in the ground with special reference to its effect on piles.
Author | : |
Publisher | : |
Total Pages | : 176 |
Release | : |
Genre | : Frozen ground |
ISBN | : |
Download SIPRE Report Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 92 |
Release | : 1964 |
Genre | : Highway research |
ISBN | : |
Download Report Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 156 |
Release | : 1985 |
Genre | : Arctic regions |
ISBN | : |
Download Special Report Book in PDF, ePub and Kindle
Author | : Cold Regions Research and Engineering Laboratory (U.S.) |
Publisher | : |
Total Pages | : 386 |
Release | : 1972 |
Genre | : Frozen ground |
ISBN | : |
Download USA CRREL Technical Publications Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 620 |
Release | : 1989 |
Genre | : Transportation |
ISBN | : |
Download Transportation... Weekly Government Abstracts Book in PDF, ePub and Kindle