Local scour around circular piers under ice covers
2002 (English)In: Ice in the environment: proceedings 16th International Symposium on Ice, Dunedin, New Zealand, 2 - 6 December 2002 / [ed] Vernon A. Squire, Dunedin: Dep. of Physic, Univ. of Otago , 2002, 149-155 p.Conference paper (Refereed)
This paper presents a laboratory investigation on the effect of ice cover on local scour around circular bridge piers. Experiments were performed in a 12-meter flume with recirculating sediment discharge. Both smooth and rough artificial covers were used. The bed material consisted of uniform ripple-forming sand. The tests were run for both clear water as well as live bed conditions. The results showed that for equivalent averaged flow velocities the existence of an ice cover could increase the local scour depth scour by 25 to 35 % from the free surface condition. The largest difference occurs at a live bed condition when the flow velocity, U, is in the rage of 1.5 to 2 times of the critical velocity for bed movement, U (sub c) . A rough cover gives slightly larger scour depth than a smooth cover. The movement of bed forms led to variations of scour depth with time.
Place, publisher, year, edition, pages
Dunedin: Dep. of Physic, Univ. of Otago , 2002. 149-155 p.
Research subject Soil Mechanics
IdentifiersURN: urn:nbn:se:ltu:diva-38451Local ID: cdbf3ec0-743e-11dd-a03a-000ea68e967bISBN: 1877139521 (print)OAI: oai:DiVA.org:ltu-38451DiVA: diva2:1011952
International Symposium on Ice : 02/12/2002 - 06/12/2002
Godkänd; 2002; 20080827 (andbra)2016-10-032016-10-03Bibliographically approved