Frost-heaving mechanical analysis of the trapezoidal canal with water delivery in winter using both Winkler-Pasternak model

被引：0

作者：

Xiao M. ^{[1
]}

Zhu W. ^{[1
]}

Wang Z. ^{[2
,3
]}

Wu L. ^{[1
]}

Yang X. ^{[4
]}

Cui H. ^{[1
]}

Ge J. ^{[5
]}

机构：

[1] School of Civil Engineering, Disaster Prevention and Mitigation Engineering Technology Research Base of Think Tank of Jiangxi Association for Science and Technology, Jiangxi Science&Technology Normal University, Nanchang

[2] Research Center of Arid and Cold Regions Water Engineering Safety, Key Laboratory of Agricultural Soil and Water Engineering in Arid and semiarid Areas of Ministry of Education, Northwest A&F University, Yangling

[3] State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou

[4] College of Water Conservancy and Construction Engineering, Tarim University, Alaer

[5] College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou

来源：

Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | 2023年 / 39卷 / 10期

关键词：

cancal; frost heave; frozen soil engineering; mechanical model; water deliver in winter; Winkler-Pasternak model;

D O I：

10.11975/j.issn.1002-6819.202212075

中图分类号：

学科分类号：

摘要：

A water delivery system can be gradually away from the normal state of the canal operation in northern China in winter. Water diversion projects can be launched to meet the harsh requirement on the large and medium-sized city's residents living water and industrial water consumption, as the guaranteed rates increased. However, the existing mechanical model of the canal with the water delivery cannot fully consider the difference between the freezing and underwater non-freezing areas in winter, particularly for the continuity of soil. It is a high demand to combine the difference in shear stiffness between frozen soil and non-frozen soil. Pasternak model with two parameters can be expected to consider the soil continuity in the freezing area, whereas, the traditional Winkler model can be adopted in the non-freezing area. By contrast, the Winkler model with only a few parameters can be easily calculated for definite physical significance. In this study, the combined Winkler-Pasternak model was proposed for the frost-heaving mechanical analysis of the trapezoidal canal with water delivery in winter. Taking a trapezoidal canal with water delivery in winter in the Manas River basin in Xinjiang of western China as a prototype, the real normal frost-heaving amount, and subsidence deformation of the canal lining plate were also calculated using the improved model, Winkler and Pasternak model. Then, the bending moment was calculated with the upper surface stress of each section of the lining plate. The results indicate that the lining plate was divided into three parts of frost heave, subsidence and frost heave-subsidence transition section. Three models better represented the basic change trend of normal displacement of the lining plate. Meanwhile, the improved model was in better agreement with the measurement. A comparative analysis showed that the improved model was much more accurate than the traditional Winkler model in the freezing area, whereas, some errors but trivial differences were compared with the Pasternak model in the non-freezing area. Furthermore, the improved model shared the excellent performance of the Winkler model, such as simple calculation, clear physical meaning, and few required parameters. The bending moment of sections decreased rapidly in the freezing area with the increase of groundwater depth. The risk of frost-heaving damage to the canal lining plate was dramatically reduced at the groundwater level by appropriate drainage measures. The position in the frozen soil area of the lining plate easy to crack was located at 10.0%~23.3% of the lining plate length away from the waterline. The optimal operation conditions were adopted in the ice-free water delivery of the trapezoidal canal in winter. The improved model can be also applied to the ever-increasingly common situation of water delivery with the ice cover. The finding can provide a strong reference to design the frost heave resistance of the trapezoidal canal with water delivery in winter. © 2023 Chinese Society of Agricultural Engineering. All rights reserved.

引用

页码：88 / 95

页数：7

共 38 条

[1] CAI Zhengyin, ZHANG Chen, ZHU Xun, Et al., Improvement of capacity and safety protection technology for long-distance water delivery projects in cold regions, Chinese Journal of Geotechnical Engineering, 44, 7, pp. 1239-1254, (2022)
[2] (2022)
[3] WANG Zhengzhong, JIANG Haoyuan, WANG Yi, Et al., Research progress and frontiers in anti-seepage and anti-frost heave of canals in cold-arid regions, Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 36, 22, pp. 120-132, (2020)
[4] HE Pengfei, MA Wei, Study of canals in cold regions of China: Achievements and prospects, Journal of Glaciology and Geocryology, 42, 1, pp. 182-194, (2020)
[5] XIAO Min, WANG Zhengzhong, LIU Quanhong, Et al., Mechanical model for frost heave damage of large-sized canal considering bi-directional frost heave of frozen soil and lining plate frozen shrinkage, Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 34, 8, pp. 100-108, (2018)
[6] GE Jianrui, WANG Zhengzhong, NIU Yonghong, Et al., Elastic foundation beam unified model for ice and frost damage concrete canal of water delivery under ice cover, Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 36, 1, pp. 90-98, (2020)
[7] WEI Yaoguo, WEN Shiyi, YANG Jinbo, Et al., Evaluations on ice condition of South-to-North Water Diversion Middle Route Project in typical cold winter and mitigation measures, China Water, 70, 10, pp. 33-35, (2019)
[8] (2013)
[9] SONG Ling, OUYANG Hui, YU Shuchao, Frozen heaving and capacity of frozen heaving resistance of trapezoidal concrete lining canal with water in winter, Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 31, 18, pp. 114-120, (2015)
[10] SELVADURAL A P S, SHINDE S B., Frost heave induced mechanics of buried pipelines, Journal of Geotechnical Engineering, 119, 12, pp. 1929-1952, (1993)

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