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<p>In laboratory studies, a sleeve has been investigated as an effective scour protection device around bridge abutments. Sleeve is the open-ended, pipe-like cylindrical enclosure that is placed around semi-circular ended vertical wall bridge abutment. The primary mechanism by which the sleeve reduces scour is by confining the scouring vortex within the annular space between the abutment and the sleeve, thus restricting the erosive effect of the flow around the base of the abutment. Experiments were conducted using four different horizontal sizes of sleeves around abutment and positioned at various vertical elevations relative to the average sediment bed level. The experimental results demonstrated a clear relationship between size of sleeve and scour reduction efficiency. Especially, smaller sizes of sleeve around abutment exhibited higher performance potential around abutment and achieved a performance improvement of 66.42% compared to an unprotected semi-circular ended vertical wall abutment. Among the tested configurations, the sleeve of size 1.5<i>L</i><sub>a</sub> around the abutment along with vertical height of 0.5<i>L</i><sub>a</sub> above the bed level proved to be the most effective. These experimental findings suggest that the sleeve proves an efficient and reliable solution for controlling scour around bridge abutments, contributing to safer and more durable hydraulic structures.</p>

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Local scour reduction around bridge abutment using protective sleeve

  • 期刊论文

  • 发表日期：

    2025年10月5日

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  • Damodar Lal Meena,
  • Vikas Garg

摘要

In laboratory studies, a sleeve has been investigated as an effective scour protection device around bridge abutments. Sleeve is the open-ended, pipe-like cylindrical enclosure that is placed around semi-circular ended vertical wall bridge abutment. The primary mechanism by which the sleeve reduces scour is by confining the scouring vortex within the annular space between the abutment and the sleeve, thus restricting the erosive effect of the flow around the base of the abutment. Experiments were conducted using four different horizontal sizes of sleeves around abutment and positioned at various vertical elevations relative to the average sediment bed level. The experimental results demonstrated a clear relationship between size of sleeve and scour reduction efficiency. Especially, smaller sizes of sleeve around abutment exhibited higher performance potential around abutment and achieved a performance improvement of 66.42% compared to an unprotected semi-circular ended vertical wall abutment. Among the tested configurations, the sleeve of size 1.5La around the abutment along with vertical height of 0.5La above the bed level proved to be the most effective. These experimental findings suggest that the sleeve proves an efficient and reliable solution for controlling scour around bridge abutments, contributing to safer and more durable hydraulic structures.