考虑冻胀及水力断面双优梯形最佳断面

徐虎城; 刘雨昕; 王羿; 韩孝峰; 迪娜·吐尔孙阿力

doi:10.11779/CJGE2022S2044

考虑冻胀及水力断面双优梯形最佳断面 English Version

1.
新疆额尔齐斯河投资开发(集团)有限公司, 新疆乌鲁木齐 830000
2.
上海理工大学环境与建筑学院, 上海 200093
3.
南京水利科学研究院岩土工程研究所, 江苏南京 210024

基金项目:

中央级公益性科研院所基本科研业务费专项资金项目 Y321009

中央级公益性科研院所基本科研业务费专项资金项目 Y322008

详细信息

作者简介:
徐虎城(1974—)，男，硕士，正高级工程师，主要从事寒区水利工程施工与管理。E-mail: wangyimutou@126.com

通讯作者:
王羿, E-mail: yiwang@nhri.cn

中图分类号: TU445
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出版历程
- 收稿日期: 2022-12-07
- 网络出版日期: 2023-03-26
- 刊出日期: 2022-11-30

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

1.
Xinjiang Irtysh River Investment and Development (Group) Co., Ltd., Urumqi 830000, China
2.
College of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
3.
Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China

摘要

摘要: 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。
- 抗冻胀 /
- 水力最佳 /
- 梯形渠道 /
- 水热力耦合
Abstract: 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.
- frost-heave resistance /
- hydraulic optimization /
- trapezoidal canal /
- coupled heat-moisture-stress

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图 1 北疆输水渠道尺寸

Figure 1. Sizes of a canal in Northern Xinjiang

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图 2 梯形断面有限元网格图

Figure 2. Finite element grids of trapezoidal canal section

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图 3 渠道温度场分布

Figure 3. Distribution of temperature field of canal

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图 4 法向冻胀量比较

Figure 4. Comparison of normal frost-heave quantity

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图 5 不同坡比法向冻胀量比较

Figure 5. Comparison of normal frost-heave quantity under different slopes

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图 6 不同宽深比法向冻胀量比较

Figure 6. Comparison of normal frost-heave quantity under different breadth depth ratios

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表 1 渠道各部位的表面温度以及冻结期

Table 1 Surface temperatures and freezing periods of various parts of canal

部位	月平均表面温度/(℃)			冻结期、（月-日）
部位	12月	1月	2月	冻结期、（月-日）
阴坡	-14.92	-18.85	-10.72	11-27—02-27
渠底	-14.56	-16.22	-9.15	11-27—02-26
阳坡	-12.55	-14.75	-10.54	11-27—02-27

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表 2 原型渠道基本情况

Table 2 Basic information of prototype canal

部位	渠床土质	基土干密度/(g·cm^-3)	冻深h/cm	冻胀量Δh/cm	冻胀率η/%
阴坡	砂砾石	1.80	171	5.0	2.92
渠底			159	4.4	2.77
阳坡			146	3.7	2.53

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表 3 材料热力学参数

Table 3 Thermodynamic parameters of materials

介质	弹性模量E/Pa	泊松比 $\nu$	导热系数 $\lambda$ /(W·m^-1·℃)	线膨胀系数α/℃^-1
混凝土	2.4×10¹⁰	0.167	1.580	1.1×10^-5
冻土	4.6×10⁷	0.330	1.188^[9]	阴坡2.92%、渠底2.77%、阳坡2.53%
未冻土	1.5×10⁷	0.375	1.320	0

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