Proposal of the permafrost slope supporting structure with framed ventilation anchor pipe and preliminary study on its ventilation effect

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	Proposal of the permafrost slope supporting structure with framed ventilation anchor pipe and preliminary study on its ventilation effect
	Dong, Jianhua 1,2; Sun, Guodong 1,2; Dong, Xuguang 1,2; Zhang, Mingli 1,2
刊名	Tumu Gongcheng Xuebao/China Civil Engineering Journal
	2018-12-01
卷号	51 期号:12 页码:101-110
关键词	Cold working Cooling Finite element method Metal drawing Permafrost Slope stability Structural dynamics Wind effects Active cooling Pressure differences Stability of the slopes Structural characteristics Supporting structure Theoretical calculations Ventilation effects Wind pressure differences
ISSN号	1000131X
英文摘要	Aimed at the defects of passive method commonly adopted for the treatment of frozen soil slope failure in cold region, a new permafrost slope supporting structure with framed ventilation anchor pipe, which integrates the functions of active cooling, frost expansion reduction, retaining and anchoring, is developed based on the advanced concept of "active cooling to protect the frozen soil" and the advantages of ventilating pipe and framed anchor, and then the structural characteristics and working principle of the new supporting structure are elaborated. In consideration of the resistance loss of wind speed, the calculation formula for the wind speed inside the structure is obtained based on the quantity relationship between the driving force of the natural ventilation and the pressure difference of the wind field, and then, the ventilation capacity of ventilation anchor pipe can be evaluated. Based on the example, the structural ventilation capacity and the influencing factors are analyzed using the finite element method and the theoretical calculation. The results show that the new structure has good ventilation capacity, which shall be beneficial to the stability of the slope. The wind pressure difference is the main driving force of natural ventilation of the structure, and the resistance loss along the structure is the main wind speed loss of the structure. The setting of the induced-draft elbow pipe can improve the ventilation capacity significantly. The optimal diameter ratio of pipe for the structure is about 0.4~0.7. The larger the free segment length of the structure is, the weaker the ventilation capacity of the structure is. © 2018, Editorial Office of China Civil Engineering Journal. All right reserved.
语种	中文
出版者	Editorial Office of China Civil Engineering Journal
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114470]
专题	土木工程学院
作者单位	1.Western Engineering Research Center of Disaster Mitigation in Civil Engineering of the Ministry of Education, Lanzhou; 730050, China 2.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Dong, Jianhua,Sun, Guodong,Dong, Xuguang,et al. Proposal of the permafrost slope supporting structure with framed ventilation anchor pipe and preliminary study on its ventilation effect[J]. Tumu Gongcheng Xuebao/China Civil Engineering Journal,2018,51(12):101-110.
APA	Dong, Jianhua,Sun, Guodong,Dong, Xuguang,&Zhang, Mingli.(2018).Proposal of the permafrost slope supporting structure with framed ventilation anchor pipe and preliminary study on its ventilation effect.Tumu Gongcheng Xuebao/China Civil Engineering Journal,51(12),101-110.
MLA	Dong, Jianhua,et al."Proposal of the permafrost slope supporting structure with framed ventilation anchor pipe and preliminary study on its ventilation effect".Tumu Gongcheng Xuebao/China Civil Engineering Journal 51.12(2018):101-110.