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| Mechanical model and application of frost heave damage of mold-bag-concrete lining channel |
| LIU Qian1, SHEN Xiangdong1*, XUE Huijun1, LIU Yusuo2 |
| 1. College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China; 2. Water Resources Bureau of Linhe District, Bayannaoer, Inner Mongolia 015000, China |
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Abstract In order to explore the mechanical model of frost heave damage of trapezoidal lining channel of mold-bag-concrete in the cold area, through summarizing the frost heave damage form of the concrete trapezoidal lining channel in the cold area, analyzing the mechanism of frost heave damage of the structure,and combining with a large number of field tests, the cold mold-bag-concrete lining channel stress problem was studied. On this basis, through reasonable assumptions and simplification of lining channels,the mechanical model of frost heave damage of the mold-bag-concrete trapezoidal lining channel was proposed,the expression of internal force of the mold-bag-concrete slab under cavitation was deduced,and the judgment criterion of the mold-bag-concrete lining structure suffered from the frost heave damage was summarized. The maximum normal frost heave force and tangential force was determined with the related standard,which could solve the internal stress of the mold-bag-concrete panels, and the thickness of mold-bag-concrete was checked,providing a theoretical basis for the future engineering design. In the actual project, the mold-bag-concrete lining structure was prone to breakage and damage under cavitation,and the cavitation should be avoided in the mold-bag-concrete lining structure.
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Received: 28 October 2017
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