Simulation Frost Heaving of Trapezoidal Channel and Optimization of Lining Seam Design with Solar Radiation in Considerations

WANG Jianyou; LIANG Taili; LU Linfang; WANG Juan; SHI Pengchao

doi:10.13522/j.cnki.ggps.2022687

Abstract：[Objective]Frost and heaving are natural hazards faced by water channels in temperate and boreal regions.In this paper we proposed a model to simulate frost and heaving of trapezoid channels by considering the effect of solar radiation.The simulated results were used to optimize the lining seam.[Method]The simulation was based on the software ABAQUS.We.first calculated the influence of angle and efficiency of solar radiation on the temperature of the two slopes of the channel,and then used this to estimate the temperature change in the concrete lining surface.This,combined with the lowest daily temperature,was used as a boundary condition of the trapezoidal channel in numerical simulation.The model was applied to the trapezoidal channel in the Zhaokou Yellow Diversion Irrigation district.The temperature,stress and deformation field simulated by the model were used to optimize two kinds of lining joints,one was at the toe of the shadow slope and the other one was at a position 1/3(of the slope length)from the toe.[Result]The simulated freezing depth and cracking position are in good agreement with the measured data.The channel linings for mitigating frost swelling was more effective when the seam was 1/3 away from the slope foot.[Conclusion]Using the temperature boundary condition calculated by the proposed method,the model can accurately simulate the destruction of trapezoidal channels by frost heave.The simulation results are in good agreement with empirical data,which can help channel design to mitigate the adverse effect of frost and heave on trapezoidal channels in temperate and boreal regions.