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Local scour around circular piers under ice covers
Clarkson University, Department of Civil and Environmental Engineering, Potsdam, NY.
Clarkson University, Department of Civil and Environmental Engineering, Potsdam, NY.
Luleå tekniska universitet.
2002 (Engelska)Ingår i: 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, s. 149-155Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

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.

Ort, förlag, år, upplaga, sidor
Dunedin: Dep. of Physic, Univ. of Otago , 2002. s. 149-155
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URN: urn:nbn:se:ltu:diva-38451Lokalt ID: cdbf3ec0-743e-11dd-a03a-000ea68e967bISBN: 1877139521 (tryckt)OAI: oai:DiVA.org:ltu-38451DiVA, id: diva2:1011952
Konferens
International Symposium on Ice : 02/12/2002 - 06/12/2002
Anmärkning
Godkänd; 2002; 20080827 (andbra)Tillgänglig från: 2016-10-03 Skapad: 2016-10-03Bibliografiskt granskad

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