Analysis on Coupling Model of Permafrost Slope Reinforced by Frame Structure with Anchors

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	Analysis on Coupling Model of Permafrost Slope Reinforced by Frame Structure with Anchors
	Dong, Jian-Hua 1,2; Dai, Tao 1,2; Dong, Xu-Guang 1,2; Sun, Guo-Dong 1,2
刊名	Zhongguo Gonglu Xuebao/China Journal of Highway and Transport
	2018-02-01
卷号	31 期号:2 页码:133-143
关键词	Anchors Axial flow Cold working Freezing MATLAB Moisture Permafrost Shear stress Structural frames Thawing Coupling modeling Experimental research Frame structure Freeze-thaw Horizontal displacements Mathematical calculations Potential slip surface Road engineering
ISSN号	10017372
英文摘要	In order to clarify the working mechanism of frame supporting structure with anchors in the cold region, a coupled mathematical calculation model of heat-moisture-stress was established. The coupled model was analyzed by the finite element method, and a calculation program was written based on the MATLAB software. Besides, the program was verified by the existing experimental research. Through the examples, the distribution laws of the temperature field, moisture field and stress field of the slope and the freeze-thaw reaction of the supporting structure were obtained. The results show that the upper part of slope is greatly influenced by temperature, and the active layer is nearly saturated when it melts. And there exists the supersaturated "bubble" at the bottom of slope. In addition, the shear stress in the process of the freezing whose maximum value is twice as large as that in the process of thawing is evenly distributed. The slope is stable during this process. While there appears a shear stress mutation at the interface between active layer and stable frozen soil layer during the thawing. The slope is unstable, and the interface is the potential slip surface. In a freeze-thaw cycle, the axial force of anchor bolt, the internal force of column and the horizontal displacement increase first and then decrease, and all of them increase with the increase of the slope height. The laws of structural internal force and horizontal displacement under the three conditions from the largest to the smallest are freezing stage, thawing stage and the initial stage. The axial force at the anchor head in each soil layer dramatically increases during the frost heaving process, while the increase amplitude gradually decreases in the axial direction. In the process of thawing, the anchor force and the internal force of column decrease significantly, with a residual deformation produced. Therefore, when the permafrost slope is supported by frame anchor, the supporting structure is supposed to be designed and calculated under the frost heaving condition. © 2018, Editorial Department of China Journal of Highway and Transport. All right reserved.
语种	中文
出版者	Xi'an Highway University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113775]
专题	土木工程学院
作者单位	1.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 2.Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China
推荐引用方式 GB/T 7714	Dong, Jian-Hua,Dai, Tao,Dong, Xu-Guang,et al. Analysis on Coupling Model of Permafrost Slope Reinforced by Frame Structure with Anchors[J]. Zhongguo Gonglu Xuebao/China Journal of Highway and Transport,2018,31(2):133-143.
APA	Dong, Jian-Hua,Dai, Tao,Dong, Xu-Guang,&Sun, Guo-Dong.(2018).Analysis on Coupling Model of Permafrost Slope Reinforced by Frame Structure with Anchors.Zhongguo Gonglu Xuebao/China Journal of Highway and Transport,31(2),133-143.
MLA	Dong, Jian-Hua,et al."Analysis on Coupling Model of Permafrost Slope Reinforced by Frame Structure with Anchors".Zhongguo Gonglu Xuebao/China Journal of Highway and Transport 31.2(2018):133-143.