Study on Critical_Allowable Shear Stress of Filling Rocks With Mattress Revetment

Bae, Sang-Soo; Lee, Seung-Yoon; Jee, Hong-Kee

doi:10.3741/jkwra.2008.41.2.137

Cited by 3 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Kim et al (2007)은 유선의 형태, 하상경사, 유속 및 소류력비 등에 대한 호안의 평가점수를 제안하였으나 평가기준의 명확한 물리적인 근거가 제시되지 않았다. 또한, Bae et al (2008) 은 Simons et al (1984) …”

unclassified

A Study on Stability of Levee Revetment in Meandering Channel

Kim¹,

Yoon²

2015

J. Korea Water Resour. Assoc.

View full text Add to dashboard Cite

The levee protect lifes, houses, and properties by blocking overflow of river. The revetment is forced to be covered on the slope of levee in order to prevent erosion. The stability of revetment is very important enough to directly connected to the stability of levee. In this study, the weak points of revetment on meandering channel were found by movable revetment experiment and the velocity and the water surface elevation (WSE) were measured at main points. The 3-D numerical simulations were performed under same conditions with experiment. And unclear flow characteristics by the limit of measuring instruments were analyzed through numerical simulation. Consequently, the section of large wall shear stress and the failure section are almost the same. Despite of small wall shear stress, the revetments located at right bank were carried away because of circulation zone due to secondary flow by meandering. With existing riprap design formula, the sizes of riprap determined using maximum local velocity were 1.5～4.7 times greater than them using mean velocity. As a result of this study, it is necessary to calculate the size of riprap in other ways for meandering and straight channel. At a later study, if the weighted value considered the radius of curvature and shape of hydraulic structure is applied to riprap design formula, it is expected that the size of revetment was evaluated rationally and accurately.

show abstract

unclassified

A Study on Stability of Levee Revetment in Meandering Channel

Kim¹,

Yoon²

2015

J. Korea Water Resour. Assoc.

View full text Add to dashboard Cite

show abstract

Study on Applicability of River Revetment Design for consideration of Velocity Variation due to Meandering and Scour Effect

Kim¹,

Yoon²

2016

Journal of the Korea Academia-Industrial cooperation Society

View full text Add to dashboard Cite

Revetments help protect levee slopes from erosion. If the design of the revetment is not appropriate, the levee may collapse as a result of scouring due to the strong flow velocity and tractive force. Therefore, when designing a revetment, it is very important to calculate the representative velocity. However, the average velocity and depth calculated by 1-D varied flow analysis are generally applied to the design, which do not reflect the increase in velocity caused by the free and force vortex. Therefore, it is necessary to correct the representative velocity in order to ensure the stability of the revetment in a meandering channel. In this study, the applicability of the method of calculating the representative velocity considering the curve and scour was studied (by comparing it with) the average and maximum velocities determined by numerical simulation. The representative velocity corrected for the effect of the curve and scour and the maximum velocity calculated by the numerical simulation were found to match quite well. In addition, the riprap size of the gabion in the meandering and straight channels were compared by applying them to the conventional design formulas. In the future, it is necessary to perform additional numerical simulations for various rivers with different characteristics, in order to propose a method of designing a suitable revetment for Korean characteristics. At this time, the results of this study are expected to be able to be used as basic data.

show abstract

Suggestion of Riprap Revetments Design Techniques considering River Meandering

Yoon¹

2014

Journal of Korean Society of Hazard Mitigation

View full text Add to dashboard Cite

In Korea, most levee breaks had been occurred at steep or meandering region in river. To mitigate inland flood by protecting levee, riprap design formula should be modified by adopting channel meandering. In this study, experimental study had been performed to suggest modified riprap design formula. Unstability conditions of riprap revetments were regenerated in a straight and two meandering experimental channels. After experimental observation of unstability of riprap, the modified riprap design formula had been suggested. Furthermore, the design formula adopts correction coefficients which can consider cross section averaged velocity and channel meandering.

show abstract

Study on Critical_Allowable Shear Stress of Filling Rocks With Mattress Revetment

Cited by 3 publications

References 3 publications

A Study on Stability of Levee Revetment in Meandering Channel

A Study on Stability of Levee Revetment in Meandering Channel

Study on Applicability of River Revetment Design for consideration of Velocity Variation due to Meandering and Scour Effect

Suggestion of Riprap Revetments Design Techniques considering River Meandering

Contact Info

Product

Resources

About