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Local scour around ...
Local scour around circular piers under ice covers
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- Ackermann, N.L. (författare)
- Clarkson University, Department of Civil and Environmental Engineering, Potsdam, NY
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- Shen, Hung Tao (författare)
- Clarkson University, Department of Civil and Environmental Engineering, Potsdam, NY
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- Olsson, P. (författare)
- Luleå tekniska universitet
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(creator_code:org_t)
- Dunedin : Dep. of Physic, Univ. of Otago, 2002
- 2002
- Engelska.
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Ingår i: Ice in the environment. - Dunedin : Dep. of Physic, Univ. of Otago. - 1877139521 ; , s. 149-155
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Geoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Geotechnical Engineering (hsv//eng)
Nyckelord
- Soil Mechanics
- Geoteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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