| 引用本文: | 王建有,梁太利,逯林方,等.考虑太阳辐射的梯形渠道冻胀模拟分析与衬砌分缝设计优化[J].灌溉排水学报,2023,42(12):99-106. |
| WANG Jianyou,LIANG Taili,LU Linfang,et al.考虑太阳辐射的梯形渠道冻胀模拟分析与衬砌分缝设计优化[J].灌溉排水学报,2023,42(12):99-106. |
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| 摘要: |
| 【目的】针对缺乏渠表温度数据而难以准确分析渠道冻胀破坏的缺陷，提出一种考虑太阳辐射的温度边界条件。【方法】考虑太阳辐射的角度及效率对梯形渠道阴阳坡温度的影响，结合混凝土表面的增温计算方法建立了梯形渠道混凝土衬砌表面增温计算模型，将梯形渠道表面增温计算结果与当地日最低气温结合后的温度作为温度边界条件。利用有限元软件ABAQUS，以赵口引黄灌区梯形渠道为研究对象，对其温度、应力和变形场进行模拟分析，并对渠道阴坡坡脚处、距坡脚1/3处2种衬砌分缝优化方案进行分析。【结果】计算冻深和开裂位置与工程实际情况吻合较好，且渠道衬砌在距坡脚1/3处分缝防冻胀效果更好。【结论】基于此温度边界条件可较好模拟无渠表温度数据的梯形渠道冻胀破坏情况，模拟结果与工程实际吻合较好，可为梯形渠道防冻胀设计提供参考。 |
| 关键词: 梯形渠道；渠道冻胀；太阳辐射；衬砌设计 |
| DOI：10.13522/j.cnki.ggps.2022687 |
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| Simulation Frost Heaving of Trapezoidal Channel and Optimization of Lining Seam Design with Solar Radiation in Considerations |
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WANG Jianyou, LIANG Taili, LU Linfang, WANG Juan, SHI Pengchao
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1. School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China;
2. Zhaokou Yellow Diversion Irrigation District Phase II Project Construction Administration, Kaifeng 475008, China
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| 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. |
| Key words: trapezoidal channel; channel frost heaving; solar radiation; lining design |
