Shanghai Water Engineering Design and Research Institute

Shanghai, China

Shanghai Water Engineering Design and Research Institute

Shanghai, China
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Zhang L.-J.,Hohai University | Zhang H.-Y.,Hohai University | Ji Y.-X.,Shanghai Water Engineering Design and Research Institute | Hu S.-W.,Nanjing Hydraulic Research Institute
International Journal of Structural Stability and Dynamics | Year: 2014

The mutation of mass and stiffness between the superstructure and substructure of a hydropower station can lead to the whiplash effect on the hydropower house during an earthquake. This paper explains the mechanism of the whiplash effect based on the theory of structural dynamics. A Chinese hydropower house was taken as a test case to discuss the whiplash effect on this type of structures. An integral finite element model and partial models of the hydropower house were established according to its structural features, arrangement forms and loading features. The dynamic response and the whiplash effect of the hydropower house were investigated by direct time integration using the Newmark method. © 2014 World Scientific Publishing Company.


Tong H.,Hohai University | Tong H.,Shanghai Qing Cao Sha Raw Water Engineering Co. | Pan L.,Shanghai Water Engineering Design and Research Institute
Earth and Space 2012 - Proceedings of the 13th ASCE Aerospace Division Conference and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration | Year: 2012

When the large width closure gap need to be completed under the condition of rapid flow and limited construction period, gap closure work becomes one of the most difficult construction part of all the whole Qingcaosha reservoir dike project. Considering the huge engineering quantity and complex hydrology of such engineering during construction phase, the real-time monitor, analysis and prediction of the hydrology are implemented. With numerical analysis of the closure gap under the design tide process, the model results show that the rising flow of the closure gap is more rapid than the ebb flow, and the maximum current speed caused by water level difference between the internal and external is mostly located at top slope corners of the gap protection layer. From the result of observation and calculation, the local maximum current speed was about 4.0m/s and experienced a short time due to small tidal range, which is suitable for construction. To sum up, it is feasible and helpful to combine the real-time observation with numerical analysis to ensure the safety in construction during the closing of the closure gap. © ASCE 2012.


Ji Y.-X.,Hohai University | Yang F.,Hohai University | Zhang H.-Y.,Hohai University | Lu Y.-J.,Shanghai Water Engineering Design and Research Institute
China Ocean Engineering | Year: 2013

The Suzhou Creek Sluice is currently the largest underwater plain gate in the world, with a single span of 100 m. It is located in a tidal estuary at the junction of the Huangpu River and Suzhou Creek in Shanghai, China. In this study, physical and 2D vertical mathematical models were used to investigate and distinguish the mechanism of siltation downstream of an underwater plain gate from that of other gates types. According to quantitative data obtained by site investigation and the application of the physical hydrodynamic models, it was found that the characteristics of the tidal estuary as well as the fact that the sluice span is equal to the creek width are the major reasons contributing to siltation. A possible desiltation treatment system is proposed for the underwater plain gate. The system includes selection of a suitable location that allows the determination of a reasonable top elevation of the sluice floor, reserving sufficient space under the gate to accommodate siltation, setting up a mechanical desiltation system, and flushing silt along with overflow over the top of the gate. Furthermore, on-site hydraulic silt flushing experiments and a topography survey were conducted. These results showed that the measurement system is effective, and by maintaining this scheduled operation once a month, the downstream riverbed has been maintained in a good condition. © 2013 Chinese Ocean Engineering Society and Springer-Verlag Berlin Heidelberg.


Ren H.,Shanghai Water Engineering Design and Research Institute | Ren H.,Hohai University | Shen Z.,Hohai University
Applied Mechanics and Materials | Year: 2012

According to the information about underground damage in earthquake all over the world, it is summarized that earthquake damage is caused by mountain slope failure, the collapse of cavern's export, dislocation damage of cavern's cross-section, great displacement along the fault intersection, spalling of surrounding rock, disturbance or deformation of the support and lining system, et. The earthquake damage factors of underground cavern were analyzed by using numerical simulation techniques. It is shown that when the earthquake intensity value is high, or the initial stress field is small, or lining stiffness is high, the underground will more easily be destroyed by earthquake. Compared with the square tunnel and horseshoe-shaped tunnel, dynamic stability of circular tunnel is better. The export of cavern is vulnerable to earthquake damage. © (2012) Trans Tech Publications, Switzerland.


Yuan W.,Shanghai Water Engineering Design and Research Institute | Liu S.,Tongji University
14th Water Distribution Systems Analysis Conference 2012, WDSA 2012 | Year: 2012

The objective of present work is to investigate air transport in water supply pipeline Tjunction. A three-dimensional computational fluid dynamics (CFD) model using volume of fluid (VOF) method is presented for predicting the evolution of phase distributing, air and water interaction, as well as distribution of air amount in downstream sections using a CFD package. Air and water transport processes was calculated for type A and type B pipeline T-junctions with diameter of 100mm in 8 cases. The result reveals that T-junction type effects air split into downstream sections and positions of stagnant areas. The interaction of air buoyancy and flow inertia force is the mainly reason for secondary flow phenomenon in downstream sections. The distribution of air enters downstream sections can approximate equal to the ratio of outflows of downstream sections. Copyright © (2012) by Engineers Australia.


Lu Y.-J.,Shanghai Water Engineering Design and Research Institute | Du X.-T.,Shanghai Water Engineering Design and Research Institute
Journal of Hydrodynamics | Year: 2010

Gap closing under high current velocity is a Gordian knot in water conservancy project, jackstone gap closing with large frame cages is a new technology to solve this problem. Associated with practice in the project of Qingcaosha reservoir and analysis on hydraulic numerical simulation and physical experiment, several hydraulic characteristic rules of this technology were discovered, it is of instructional value in practices of similar projects. © 2010 Publishing House for Journal of Hydrodynamics.


Wang W.,Shanghai Water Engineering Design and Research Institute | Pu X.,Shanghai Water Engineering Design and Research Institute | Zhao N.,Shanghai Water Engineering Design and Research Institute
Advances in Science and Technology of Water Resources | Year: 2013

Based on the physical and chemical properties of the dredged spoil samples in Shanghai, prospect analysis of reclamation projects using clean dredged spoils was conducted in terms of the availability and economic costs. Grain-size analysis results show that the dredged spoils can be used as a material of the reclamation projects in this study area. Based on the economic analysis of breakeven in reclamation projects using clean dredged spoils, project costs can be reduced when route distance from the dredging place to the reclamation projects is longer than the critical route distance. Reclamation projects using clean dredged spoils in Shanghai are considered a green marine industry. It can reduce the pressure of waste dumping at sea, and can alleviate the problem of resources shortage in reclamation projects in Shanghai. The application of the dredged spoils in reclamation projects has technical and economic feasibility, and needs specific analysis for specific projects, and especially needs policy support and guidance.


Chen F.,Shanghai Water Engineering Design and Research Institute | Tian L.-Y.,Shanghai Water Engineering Design and Research Institute | Lu W.-H.,Shanghai Water Engineering Design and Research Institute
Yantu Lixue/Rock and Soil Mechanics | Year: 2010

The metro 11 line shield tunnel passing through the Suzhou River, will impact on the security of flood wall for Suzhou River. The pile foundation relative to shield tunnel was raised and a "double span" portal frame was adopted to ensure the appliance of shield tunnel. Not only the security of flood wall is assuring, but the space for shield tunnel is adequate to the demand. The diversity in the stress and deformation construction of flood wall with shield tunnel or not, was analyzed by constitutive model built on the finite element method. Before shield tunnelling the deformation of bed plate foundation is consistent in it of continuous beam, both the middle part of long pile and the top part of short pile are detected in the extrorse deformation; and the stress rule of the whole structure accord with inherent characteristic of the portal frame. After shield tunneling the deformation of bed plate foundation is similar to it before shield tunnelling; the maximal deformation lies in the middle part of the tunnel upside. By contraries, after shield tunnelling both the middle part of long pile and the top part of short pile are detected in the introrse deformation. The deformation of long pile is in the form of bending deflection, and the maximal deformation lies in the neighborhood of the tunnel axle wire, the deformation of short pile is in the form of rigid body deformation; the maximal deformation lies in the bottom of itself. The theoretical settlement calculated approximates to the practical settlement tested; it is shown that the influence on the deformation of the flood wall by shield tunnelling is of controllable condition.


Yuan W.,Shanghai Water Engineering Design and Research Institute
ICPTT 2014 - Proceedings of the 2014 International Conference on Pipelines and Trenchless Technology | Year: 2014

The concept of DBS is introduced to water supply network planning stage. Based on natural conditions and combine the situation of pipe network layout, the DBS methods and principles are discussed. According to hydraulic model, the DBS planning programs, which have been assessed by EPANET 2.0, satisfies the water security. Compared with the traditional planning programs, the implementation of DBS in planning period can save construction costs. The paper attempts to enhance the water supply network planning and design standards, improve the water network management and operational levels. © 2014 American Society of Civil Engineers.


Yuan W.,Shanghai Water Engineering Design and Research Institute
ICPTT 2014 - Proceedings of the 2014 International Conference on Pipelines and Trenchless Technology | Year: 2014

EPANET as a network modeling software is widely used in water pipe network design, operation and management. However, due to lack of pipe diameter property when importing from CAD network topology, the pipe network modeling efficiency has been restricted. EXCEL VBA function is known as easy to learn. A program of automatic assignment procedure for pipe diameter of the water network based on VBA is given in the present work. It is easy to understand, and greatly enhances the efficient of network modeling. EPANET INP file is used to be a data processing carrier. Make use of VBA functions for data search and calculation and improve software coupled to solve practical engineering problems. It helps to develop and progress water pipe network model, design, operate and management. © 2014 American Society of Civil Engineers.

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