考虑冻胀及水力断面双优梯形最佳断面

Double-optimization design of trapezoidal canals considering frost-heave resistance and hydraulic section

寒区梯形混泥土渠道衬砌易产生冻胀破坏,在断面的设计过程中应同时兼顾抗冻胀和输水效率。采用冻土水热力耦合分析模型对梯形渠道进行冻胀破坏分析,归纳其冻胀变形与应力分布规律。随即对渠道水力学设计参数和抗冻胀设计参数进行双目标优化,参照渠道抗冻胀设计规范要求,提出了寒区输水渠道的水力+抗冻胀双优设计断面。

The linings of trapezoidal concrete canals in cold regions are prone to frost-heave damage,and both the frost-heave resistance and the water transport efficiency should be taken into account in the design of section.The frost-heave failure of a trapezoidal canal is analyzed by using the coupled analysis model for coupled heat-moisture-stress,and the frost-heave deformation and stress distribution are summarized.Then,the hydraulic design parameters and the anti-frost-heave design parameters of the canal are optimized with the two objectives.According to the requirements of the anti-frost-heave design code of the canal,the double-optimization design section of the water transport canal in the cold regionos is proposed.