A comparative study of scour around various shaped bridge pier

被引:11
作者
Baranwal, Anubhav [1 ]
Shankar Das, Bhabani [1 ,2 ]
Setia, Baldev
机构
[1] Natl Inst Technol, Dept Civil Engn, Patna 800005, India
[2] Punjab Engn Coll, Chandigarh 160012, India
来源
ENGINEERING RESEARCH EXPRESS | 2023年 / 5卷 / 01期
关键词
local scour; shape of bridge pier; fine bed material; shape factor; scour depth; CLEAR-WATER SCOUR; LOCAL SCOUR; HORSESHOE VORTEX; DEPTH; PILE;
D O I
10.1088/2631-8695/acbfa1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The study of scouring around bridge piers is very significant and plays a very important role in the safe and economical design of bridge piers. The term scouring is a process by which bed particles around the periphery of the pier get eroded and removed over a certain depth resulting in the formation of a scour hole around the bridge piers. This paper presents a detailed investigation of local scouring around six different shapes namely rectangular, circular, chamfered, joukowsky, oblong, and sharp-nosed of bridge pier models for selecting the best and most economical bridge pier shapes based on local scouring. For the experimental studies, local scour depth is measured around all six different shapes of bridge piers with varying discharges and velocities of 0.0169 m(3) s(-1) to 0.0355 m(3) s(-1) and 0.17 m s(-1) to 0.30 m s(-1) respectively. It is found that scour depth around the rectangular shape of bridge pier is larger due to development of strong intensity of horseshoe vortex caused by flat exposed frontal area and scour depth around the sharp nose shape of the pier is smaller because of flow is bifurcated due to smooth curvature caused less intensity of development of horseshoe vortex. In the comparison of obtained results, it is reported that scour depth around a pier is exactly proportional to velocity of approach flow and exposed frontal area of the bridge pier. The result of this study can be likely used to help in selecting the best shape of the bridge piers as sharp nose shape of bridge piers is better among the other six bridge pier shapes for design purposes.
引用
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页数:19
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