The State Key Laboratory of Hydrology Water Resources & Hydraulic Engineering

Nanjing, China

The State Key Laboratory of Hydrology Water Resources & Hydraulic Engineering

Nanjing, China

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Xia Y.F.,Nanjing Hydraulic Research Institute | Xia Y.F.,The State Key Laboratory of Hydrology Water Resources & Hydraulic Engineering | Xu H.,Nanjing Hydraulic Research Institute | Xu H.,The State Key Laboratory of Hydrology Water Resources & Hydraulic Engineering | And 3 more authors.
River Sedimentation - Proceedings of the 13th International Symposium on River Sedimentation, ISRS 2016 | Year: 2017

Following with the implementation of the 12.5m Deepwater Channel Regulation Project in the Yangtze River in Nanjing, the research of channel engineering has put forward a newtype of energy dissipation and beach protection penetrating frames structure. Based on laboratory experiments, this paper reveals the geometric characteristics of the double H permeable frame group, the energy dissipation mechanism and the effect of anti-erosion and deposit-promoting schemes, and analyzes the effect of the number of layers on the energy dissipation and combining the theoretical analysis. The research results showed that the effect of the new type of water protection and the protection of the beach can provide scientific reference for the design and application of the channel engineering. © 2017 Taylor & Francis Group, London.


Hao S.Y.,Nanjing Hydraulic Research Institute | Hao S.Y.,Hohai University | Xia Y.F.,Nanjing Hydraulic Research Institute | Xia Y.F.,The State Key Laboratory of Hydrology Water Resources & Hydraulic Engineering | And 2 more authors.
River Sedimentation - Proceedings of the 13th International Symposium on River Sedimentation, ISRS 2016 | Year: 2017

Based on the scale of submerged spur-dike and flow-sediment condition in the first phase of the 12.5m deep-water channel regulation project ofYangtze River downstream Nanjing, a normal model experiment is conducted to reveal the properties of maximum local scour depth around submerged spur-dike. The relationships of maximum local scour depth with the submergence ratio of submerged spur-dike, hydrodynamic condition and the width of bottom protective mattress are analyzed. An estimation formula of maximum local scour depth around submerged spur-dike is established through the experimental data by the principle of dimensional analysis. The formula yields well-fitting result. The study result can provide technical reference for the design of local scour protection in channel regulation. © 2017 Taylor & Francis Group, London.


Xu H.,Nanjing Hydraulic Research Institute | Xu H.,Hohai University | Xu H.,The State Key Laboratory of Hydrology Water Resources & Hydraulic Engineering | Xia Y.-F.,Nanjing Hydraulic Research Institute | And 9 more authors.
China Ocean Engineering | Year: 2015

The movement of sediment in estuary and on coast is directly restricted by the bed shear stress. Therefore, the research on the basic problem of sediment movement by the bed shear stress is an important way to research the theory of sediment movement. However, there is not a measuring and computing method to measure the bed shear stress under a complicated dynamic effect like wave and current. This paper describes the measurement and test research on the bed shear stress in a long launder of direct current by the new instrument named thermal shearometer based on micro-nanotechnology. As shown by the research results, the thermal shearometer has a high response frequency and strong stability. The measured results can reflect the basic change of the bed shear stress under wave and wave-current effect, and confirm that the method of measuring bed shear stress under wave-current effect with thermal shearometer is feasible. Meanwhile, a preliminary method to compute the shear stress compounded by wave-current is put forward according to the tested and measured results, and then a reference for further study on the basic theory of sediment movement under a complicated dynamic effect is provided. © 2015, Chinese Ocean Engineering Society and Springer-Verlag Berlin Heidelberg.

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