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| DOI：10.13522/j.cnki.ggps.2017.12.014 |
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| Numerical Simulation and Slope Coefficient Optimization of Frost Heave of Trapezoidal Channel |
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HAO Jincai, LOU Zongke, GAO Feng
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Northwest A&F University, Yangling 712100, China; The Hi-tech College of Xi’an University of Technology, Xi’an 710109, China
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| Abstract: |
| A thermo-mechanical coupled numerical model was developed in this paper for trapezoidal lining canal considering the non-linear characteristic of soil freezing at the interface between the foundation and the concrete lining, as well as the plasticity of the concrete lining. We applied the model to the main canal in Hamatong Irrigation District in Heilongjiang Province in an attempt to help design the insulation measures and cross-sections of the trapezoidal canal. Compared with canals without insulation measures, we analyzed the effectiveness of three insulation measures and different slope coefficient to the frost heave adaptability of the canal. The results showed that the optimal thickness of the canal insulation board in Hamatong Irrigation District was 10 cm on the slope and 12 cm on the bottom by considering engineering safety and economy, in close agreement with the experimental results. The reasonable slope coefficient of the trapezoidal canal was 2 while the properties adapt to frost heaving were better and the cost was relatively low in the situation. These results provide references and theoretical basis for trapezoidal canal design and operation in Heilongjiang Province and other similar areas. |
| Key words: trapezoidal canal; insulation antifreeze bulge; numerical simulation; slope coefficient |
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