TRAFFIC TESTS ON PORTAGE LAKE ICE.

• Main Authors: Stevens,H. W., Tizzard,W. J.
• Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
• Format: Text
• Language: English
• Published: 1969
• Subjects: Snow; Ice and Permafrost; (*LAKES; ICE); (*ICE; *TRAFFICABILITY); STRUCTURAL PROPERTIES; SAMPLING; COLD WEATHER TESTS; LOADS(FORCES); FLEXURAL STRENGTH; REACTION KINETICS; *FLOATING ICE; Ice; Ice Sheet; permafrost
• Online Access: http://www.dtic.mil/docs/citations/AD0700130; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0700130

A limited series of traffic tests were conducted on floating lake ice using a dual-wheel loaded to gross weights of 20,250; 28,250 and 36,250 lbs. Deflections were measured under static and moving loads on a continuous ice sheet and adjacent to a free edge. Representative samples of the ice were tested in unconfined compression, direct shear, flexure, and under a dynamic load (steady-state vibration). Crystal size and orientation were measured. An analysis of test results is presented using linear elastic theory and a method is proposed for estimating time variations of deflection. (Author)