Pressure flow and weir scour beneath a bridge deck

Baduna Koçyiğit M., Karakurt O.

CANADIAN JOURNAL OF CIVIL ENGINEERING, cilt.46, sa.6, ss.534-543, 2019 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 46 Sayı: 6
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1139/cjce-2017-0469
  • Dergi Adı: CANADIAN JOURNAL OF CIVIL ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.534-543
  • Anahtar Kelimeler: pressure flow, weir flow, river bridges, local scour, clear water scour, CONTRACTION SCOUR, WATER
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study, a series of experiments in a flume was conducted to investigate the maximum scour hole depth that occurred due to the vertical contraction of the flow underneath a bridge deck model without a pier. The bridge model was tested under pressurized and weir type of flows governed by clear water conditions. Various parameters of flow, sediment, and geometric features of the bridge, such as approach flow depth, discharge, sediment size, girder depth and degree of submergence were varied to investigate their effects on the maximum depth of scour hole. A total of 102 experiments were conducted and two empirical equations were developed separately for pressure and weir flow types with the use of experimental data. Effects of the aforementioned parameters on the scour hole were also analyzed and discussed.