| The instability and destruction of the inland waterway slope is a common phenomenon all over the world.It not only seriously erodes the soil resources on both sides of the channel,destroys the buildings along the channel slope,but also threatens the navigation safety of ships in the channel and increases the operation and maintenance expenses of the waterway.Therefore,under the background of vigorously developing inland waterway transport in our country,it is of great significance to carry out the numerical analysis and early warning platform research on the stability of the inland waterway slope.In this paper,the finite element numerical model of the inland waterway slope is established by using the large-scale finite element software ABAQUS.The stability of the inland waterway slope is numerically simulated and analyzed.The main factors considered are the change of water level,the rainfall and the traveling ship wave.In addition,based on the finite element analysis,the construction of the river slope stability warning platform for inland waterways based on GIS and FEA was completed by the method of multilingual programming.The main contents of this paper include the following aspects:(1)The finite element numerical model of bank slope stability analysis,which can simulate water level change,rainfall effect and traveling ship wave,is established.The simulation method of water level,rainfall and traveling ship wave in finite element analysis is established,and the numerical calculation results are compared with the M-P calculation results to verify the reliability of the model.(2)Based on the established finite element model,the boundary conditions and load conditions under the action of water level in the model are redefined by ABAQUS’s DISP and DLOAD subroutines to make them dynamic change over time,the numerical analysis of the slope stability of the waterway under the dynamic change of water level is realized.(3)Based on the soils type transient analysis method in ABAQUS,the stability of bank slope under rainfall is studied.The changes of rainfall intensity,rainfall duration and saturation permeability coefficient of soil are considered.The results show that rainfall effect has a significant impact on bank slope saturation,pore water pressure,displacement deformation and safety factor.(4)The cycle weakening effect of soil material under the action of shipwave is realized by USDFLD user subroutine,and the flushing effect of shipwave wave on the bank soil is realized by using Surface pore fluid load.Based on the above methods,the stability of bank slope under the shipwaves with different wave height is numerically calculated.(5)Using the multi-computer programming language of Python,MapBasic,Visual Basic and SQL,the system of early warning platform for inland waterway slope stability has been developed.The core technology of the system includes ADO docking in database establishment and ABAQUS parameterization model establishment and so on.The system is used to analyze the waterway slope in Guangxi Yuliang Navigation Hub Project.The results show that it has good applicability. |
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