Calculation method for effect of silt sediment on lifting force of hydraulic gate

Abstract

In this paper, silt sediment is considered to be Bingham body, which is made up of coarse and fine particles in front of a hydraulic gate. The coarse and fine particles provide friction and shear stress in the course of opening the gate. They constitute together the adhesion force of the sediment. Based on this viewpoint, this paper puts forward a formula for the effect of silt sediment on the lifting force. The formula includes gate weight, down-suction force, sealing rubber friction, plus-weight, water-column pressure, plus-silted-sediment weight and rolling (or sliding)-bearing friction. Finally, the verification results show that the formula has certain reliability and the calculation accuracy can meet the need of practical engineering.

Keywords

radial steel gate / plane steel gate / lifting force / silt sediment / Bingham body

References

[1] Ministry of Water Resources of the People’s Republic of China. SL74-95 Hydraulic and Hydroelectric Engineering Specification for Design of Steel Gate[S]. 1995, Beijing, China: China Water and Power Press.

[2] Xu G, Ren Xiaofeng. Study on similarity and modeling technique of model test for effect of sediment to lifting force of gate[J]. Journal of Hydraulic Engineering, 2000, 61-64.

[3] Qian Ning. Hyper-Concentrated Sediment Flow[M], 1986, Beijing, China: Tsinghua University Press.

[4] McAnally W H, Mehta A J. Aggregation rate of fine sediment[J]. Journal of Hydraulic Engineering, 2002, 126(12): 883-892.

[5] Ajanta S, Dayakar P. Effect of microfabric on shear behavior of Kaolin clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2007, 133(3): 306-318.

[6] Salehi M, Sivakugan N. Effects of lime-clay modification on the consolidation behavior of the dredged mud[J]. Journal of Waterway, Port, Coastal and Ocean Engineering, 2009, 135(6): 251-258.

[7] Shi Y, Lu J, Zhan Y, et al. Calculation of angle of repose and dry density of sediment[J]. Engineering Journal of Wuhan University, 2007, 40(3): 14-17.

[8] Apsley David D, Standbys Peter K. Bed-load sediment transport on large slopes: Model formulation and implementation within a RANS solver[J]. Journal of Hydraulic Engineering, 2008, 134(10): 1440-1451.

[9] Damgaard J S, Whitehouse R J S, Soulsby R L. Bed-load sediment transport on steep longitudinal slopes[J]. Journal of Hydraulic Engineering, 1997, 123(12): 1130-1138.

[10] Zhan Y, Xie Baoling. Under water angle of rest for non-cohesive sediment[J]. Journal of International Hydroelectric Energy, 1996, 14(1): 56-59.

[11] Wu Meiling. Hydraulic Structures[M], 1991, Beijing, China: Tsinghua University Press.

[12] Zhang Liming. Prototype observation results of several hydraulic gate lifting force friction coefficients[J]. Hydroelectric Power, 1987, 35-40.

[13] Liu X, Chen Furong. Gates and Hoists[M], 1999, Beijing, China: China Water and Power Press.

[14] He C, Wang D, Zhao Y, et al. The testing and analysis of the opening and closing force about Tianjin Ningchegu floodgate[J]. Design of Water Resources and Hydroelectric Engineering, 2000, 19(4): 36-38.

[15] Yang H, Wang H, Huang D, et al. The detection analysis of the dam sluice gates in the Xi’er River-I Hydropower plant[J]. Yunnan Water Power, 2003, 19(4): 63-67.

[16] Yang H, Wang H, Shi N, et al. The check and analysis of the stresses in the flood-releasing gate for the second dam on Xi’ er River[J]. Water Power, 2003, 29(3): 40-43.