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| DOI：10.13522/j.cnki.ggps.2017.11.011 |
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| Optimal Analysis of Anti-frost Heaping Canal with Cross Section of Trapezoidal Slopes and Curved Bed |
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AN Peng, XING Yichuan, ZHANG Aijun, ZHAO Lei, CHENG Dawei
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College of Geology Engineering & Geomatics, Chang’an University, Xi’an 710054, China; China Institute of Water Resources and Hydropower Research, Beijing 100048, China; Northwest A & F University, Yangling 712100, China; Hebei Provincial Second Investigation Design and Research Institute of Water Conservancy and Hydroelectric Power, Shijiazhuang 050021, China
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| Abstract: |
| Trapezoidal canals with curved-bedare is often used in seasonal freezing regions, but their design is based on experiences and standards whichis prone to frost heaping. In this paper, we proposed a new method to optimize the channel design. The method consists of an optimal structure model and a simplified “frozen soil- lining” model. The objective of the optimization is to minimize the costs of a unit length of canal with constraints on economic practical cross-section and the largest normal displacement and stress of the lining. We firstly simulated the highly nonlinear normal frost-heaving force using the initial displacement method in which the effective friction between the lining and the frozen soil was computed using the Mohr-Coulomb contact approach. The parametric model for canal under frost-heaving was then developed usingVersion. 2 ANSYS package written inAPDL programming language. Practical application of the model showed that the optimized cross section of the lining can resist cracking and, in the meantime, savedland by 207 m2/km and reduced the lining thickness of the canal to 0.3 cm. The proposed model has implication in structure design of channels. |
| Key words: canal; structure optimization; anti-frost design; numerical simulation |
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