In-Situ Test And Numerical Analysis Of Bore Pressuure On Sheet-Pile Groin In Qiantang River

The mechanism of the sheet-pile groin under the impact of bore in Qiantang River has not been solved since the application of the sheet pile. On the basis of the in-situ test of bore pressure on the sheet-pile groin, this paper makes a systematic study on the bore pressure on the sheet pile groin.Firstly, the information of the in-situ test is introduced. Based on the analysis of data which is obtained through the in-situ test, the principle of bore pressure on the sheet-pile groin varied with time and space is disclosed.Secondly, the force of vertical square pile under the impact of bore is studied. The semi-empirical formula for the calculation of the force is offered and the relationship of the impact coefficient and the tide height is studied.Finally, the standard k-e turbulence model and VOF for surface tracking are applied to numerical simulation of the bore against the sheet-pile groin. The numerical results show flow fields, the position of free surface and time history and spatial distribution of bore pressure on the sheet-pile groin. The comparison between the numerical results and the test results shows a good agreement. These results serve as a useful reference for future design of sheet-pile groin.