EXPERIMENTAL STUDY OF THE EFFECT OF ASYMMETRIC T-SHAPED SPUR DIKE ON THE SCOUR REDUCTION IN BRIDGE ABUTMENT

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AZHDARY KH.; EMAMGHOLIZADEH S.; REZAEI H.

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Journal: Journal of Water and Soil Conservation Year:2017 | Volume:24 | Issue:1 Page(s): 295-301

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Title

EXPERIMENTAL STUDY OF THE EFFECT OF ASYMMETRIC T-SHAPED SPUR DIKE ON THE SCOUR REDUCTION IN BRIDGE ABUTMENT

Author(s)

AZHDARY KH. | EMAMGHOLIZADEH S. | REZAEI H. | Issue Writer Certificate

Keywords

ASYMMETRIC SPUR DIKEQ1

SCOURQ1

ABUTMENTQ2

BRIDGEQ2

COMPOUND SECTIONQ1

Abstract

Background and Objectives: Proper designing and using of spur dike structure can control SCOUR and it can improve the stability of BRIDGE. The effects of different types of spur dikes on the flow properties and sediment transport are different and they depend on the SCOUR designing parameters, layout of spur dike, flow hydraulic, kind and size of sediment. Different factors have affected on the SCOUR phenomena. For study of these factors different researches are necessary. The aim of this research is the study of effective parameters of asymmetric T-shaped spur dike on the maximum SCOUR depth in BRIDGEs ABUTMENT in a COMPOUND SECTIONs.Materials and Methods: This research has conducted on a rectangular shaped flume with dimensions of 1 m width, 12 m length and 60 cm depth in hydraulic laboratory of Agriculture collage, Shahrood University of Technology. Asymmetric T-shaped spur dike with 4 relative of upstream wing wall length to downstream wing wall length (0.2, 0.5, 2 and 5) installed at distances of 9, 18, 27, 36 and 45 cm from the ABUTMENT. The amount of SCOUR in the front of ABUTMENT with discharges 18, 20, 22, 24 and 26 lit/s was studied.Results: Result of this study reveal that the maximum SCOUR depth is decreased with increasing of the ratio of the upstream wing-wall length of spur dike to the downstream wing-wall length and also results show that the SCOUR depth is decreased when the distance of spur dike from the ABUTMENT is increased. Decreasing of the SCOUR depth was 100% and 70% for discharge of 18 lit/s and 26 lit/s, respectively. With dimensional analysis of the hydraulic parameters such as discharge, average flow velocity, depth of water and geometric parameters of spur dike such as length of spur dike, length of wing-wall and distance of spur dike from the ABUTMENT, a dimensionless equation was achieved and finally based on the experimental data a new equation presented to estimate the maximum depth of SCOUR around the ABUTMENT.Conclusion: The main results of this research revealed that with increasing of the distance of spur dike from the ABUTMENT, the effect of spur dike on the SCOUR around of ABUTMENT increased and as results the SCOUR depth in the front of ABUTMENT will decrease.

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APA: Copy

AZHDARY, KH., EMAMGHOLIZADEH, S., & REZAEI, H.. (2017). EXPERIMENTAL STUDY OF THE EFFECT OF ASYMMETRIC T-SHAPED SPUR DIKE ON THE SCOUR REDUCTION IN BRIDGE ABUTMENT. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 24(1), 295-301. SID. https://sid.ir/paper/156562/en

Vancouver: Copy

AZHDARY KH., EMAMGHOLIZADEH S., REZAEI H.. EXPERIMENTAL STUDY OF THE EFFECT OF ASYMMETRIC T-SHAPED SPUR DIKE ON THE SCOUR REDUCTION IN BRIDGE ABUTMENT. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2017;24(1):295-301. Available from: https://sid.ir/paper/156562/en

IEEE: Copy

KH. AZHDARY, S. EMAMGHOLIZADEH, and H. REZAEI, “EXPERIMENTAL STUDY OF THE EFFECT OF ASYMMETRIC T-SHAPED SPUR DIKE ON THE SCOUR REDUCTION IN BRIDGE ABUTMENT,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 24, no. 1, pp. 295–301, 2017, [Online]. Available: https://sid.ir/paper/156562/en

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