STRAIN GAGE INSTRUMENTATION OF STEEL PILES IN SNOW,
Abstract
The report describes instrumentation for a preliminary test of friction piles in snow. Dynamic measurements of strain were made during driving by means of a dual oscilloscope fitted with a Land camera. The larger of the two H piles tested was an 8 x 8 WF 35 section and the smaller was a 6 x 6 M 20. Both were 30 ft long, driven in Sept. 1962, and left unloaded until the 1963 summer. A switch box was constructed and used during static tests, which allowed a forward, reverse, and calibration reading to be taken at each gage position in a minimum of time. Immediately after the load was applied, the upper section of the pile took most of the load. After the load was held in place for several weeks, each unit length of the pile had accepted an equal share of the total load. The 8 x 8 WF 35 pile was loaded to 40,000 lb and the 6 x 6 M 20 to 28,000 lb. Immediately after removal of the load, the upper section of the pile was relieved but most of the loaded strain remained in the bottom section. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0615996
Entities
People
- Erik T. Sohlberg
Organizations
- Cold Regions Research and Engineering Laboratory