带有保护层的运河边坡在冻融作用下的受热和变形行为的模型试验研究

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2024-10-05 DOI:10.1016/j.coldregions.2024.104338

Haiqiang Jiang , Xingchao Liu , Yuwei Chen , Enliang Wang , Qiang Fu , Junlin He , Hua Zhong

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引用次数: 0

摘要

冻害是影响寒冷地区运河边坡稳定性的主要因素之一。为了减轻冻害，在施工过程中铺设保护层已成为一项不可或缺的措施。本研究使用聚酯土工织物（边坡 I）和复合土工膜（边坡 II）作为保护层，建造了两个边坡模型。此外，还在特定地段铺设了对照组的保温板，以检验其防冻效果。记录并分析了冻融过程中边坡模型的温度、冻结深度和霜冻变形。结果表明，在冻结过程中，斜坡 II 的温度相对低于斜坡 I。边坡 I 的最大冻结深度和最大冻胀变形均有显著下降。特别是，最大冻胀变形段与保护层类型无关，均出现在斜坡中部。在铺设聚酯土工织物和复合土工膜后，边坡模型的最大冻胀变形分别为 33.60 毫米和 37.69 毫米。因此，聚酯土工织物在减少冻害变形方面比复合土工膜更有优势。此外，如果将保温板和聚酯土工织物一起铺设在斜坡内，最大冻胀变形可进一步减小到 9.72 毫米。这项研究将有助于寒冷地区运河边坡的设计和施工。

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Model test investigation on heat and deformation behaviors of canal slopes with protective layers caused by freeze-thaw action

Frost damage is one of the main factors affecting the stability of canal slopes in cold regions. To alleviate the damage, laying protective layers during the construction process has become an indispensable measure. In this study, two slope models were constructed using polyester geotextiles (slope I) and composite geomembranes (slope II) as the protective layer. Additionally, the insulation board in the control group were laid on specific section to examine their anti-frost effect. The temperature, frozen depth, and frost deformations of slope models during the freeze-thaw process were recorded and analyzed. Results suggest that the temperature of slope II is relatively lower than that of slope I in the freezing process. The temperature reduction at all monitoring sections of slope II are larger than that of slope I. The slope I exhibits a significant decrease in maximum frozen depth and maximum frost deformation. In particular, the section with the maximum frost deformation is independent of the type of protective layer, which all occurs in the middle of the slopes. The maximum frost deformations of slope models are 33.60 mm and 37.69 mm, respectively after laying the polyester geotextiles and composite geomembranes. Therefore, the polyester geotextiles have more advantages in reducing frost deformation than composite geomembranes. Additionally, if the insulation board and polyester geotextiles are laid together inside the slope, the maximum frost deformation can be further reduced to 9.72 mm. This study will help in the design and construction of canal slopes in cold regions.

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.