温-水-土-结构耦合作用下寒区梯形衬砌渠道结构形体优化

王羿; 刘瑾程; 刘铨鸿; 王正中

doi:10.16511/j.cnki.qhdxxb.2019.22.010

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清华大学学报（自然科学版） ›› 2019, Vol. 59 ›› Issue (8) : 645-654. DOI: 10.16511/j.cnki.qhdxxb.2019.22.010

水利水电工程

温-水-土-结构耦合作用下寒区梯形衬砌渠道结构形体优化

王羿, 刘瑾程, 刘铨鸿, 王正中

作者信息 +

Shape optimization of a trapezoidal canal structure for coupled temperature-water-soil conditions in cold regions

WANG Yi, LIU Jincheng, LIU Quanhong, WANG Zhengzhong

Author information +

文章历史 +

摘要

为提高寒区大型梯形渠道结构输水及抗冻胀破坏能力，采用分层序列法构建渠道断面水力与抗冻胀双目标优化方法。为准确反映温、水、土等外环境与衬砌结构耦合作用所导致的渠道冻胀变形过程，基于冻土水-热-力耦合冻胀理论建立了衬砌渠道冻胀分析模型。以水力最优为第1层次优化，以所得形体几何参数作为抗冻胀优化的解集空间；在第2层次的抗冻胀优化过程中提出了衬砌结构整体刚度指标，并以整体刚度指标最小作为优化目标，以衬砌允许最大法向位移和拉应力作为约束条件；通过COMSOL软件二次开发对冻胀模型控制方程进行有限元求解。工程算例表明：优化结果体现了对渠道行水和衬砌抗冻胀的改进；与原设计相比，优化后渠道结构整体刚度系数减小30%~48%，提高了对冻胀变形的适应能力。该方法可为类似工程设计提供参考。

Abstract

The shape of a large trapezoidal canal in a cold region should be optimized to improve the water delivery and minimize frost damage. This study used a double objective analysis to optimize the hydraulics and the frost damage prevention for a canal using the hierarchical sequence method. A frost heave model was developed for a concrete lining canal based on thermo-hydro-mechanics frost heave theory for freezing soil to predict the canal deformation for various temperature, water, and soil conditions. The optimal hydraulic design was predicted first with the canal section parameters then used as the solution set space for the frost damage prevention optimization. The overall stiffness index of the lining was set as the optimization object with the allowable maximum normal displacement and stress in the lining set as the optimization constraints. The model was solved using the secondary hierarchical sequence method in COMSOL. The results show that this method can consider both the water delivery and the frost damage effect on the canal section. The practical case results indicate that the overall stiffness index of the lining is reduced by 30%-48% from that of the original design using this method to get an optimized canal section, which improves the adaptability to frost damage of the lining structure. This method can also be used for similar analyses involving hydraulics and frost damage effects.

导出引用

王羿, 刘瑾程, 刘铨鸿, 王正中. 温-水-土-结构耦合作用下寒区梯形衬砌渠道结构形体优化[J]. 清华大学学报（自然科学版）. 2019, 59(8): 645-654 https://doi.org/10.16511/j.cnki.qhdxxb.2019.22.010

WANG Yi, LIU Jincheng, LIU Quanhong, WANG Zhengzhong. Shape optimization of a trapezoidal canal structure for coupled temperature-water-soil conditions in cold regions[J]. Journal of Tsinghua University(Science and Technology). 2019, 59(8): 645-654 https://doi.org/10.16511/j.cnki.qhdxxb.2019.22.010

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基金

国家重点研发计划“水资源高效开发利用”重点专项（2017YFC0405100）；国家自然科学基金项目（51279168）；国家十二五科技支撑计划（2012BAD10B02）；中央高校基本科研业务科技创新专项（Z102021848，Z109021807）

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收稿日期	出版日期
2018-10-31	2019-08-15
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2019-08-05

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