Bearing capacity and displacement characteristics of long-short composite piles in loess areas

doi:10.11779/CJGE2018S1042

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	Bearing capacity and displacement characteristics of long-short composite piles in loess areas
	Ma, Tian-Zhong 1,2; Zhu, Yan-Peng 1,2; Ren, Yong-Zhong 3; Ling, Yong-Qiang 1,2
刊名	Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering
	2018-05-01
卷号	40 页码:259-265 and 92
关键词	Bearing capacity Friction Geotechnical engineering Loads (forces) Pile foundations Sediments Skin friction Testing Bearing characteristic Composite pile foundations Deformation Characteristics Displacement characteristic Load sharing Long-short composite piles Model tests Skin friction of piles
ISSN号	10004548
DOI	10.11779/CJGE2018S1042
英文摘要	The researches on new pile foundation are insufficient in loess areas. In order to introduce and promote the composite pile foundation with long and short piles in the loess areas, the bearing characteristics of pile foundation need to be further studied. The laboratory model test apparatus is developed. The model test apparatus is loaded through servo loading system under the single-pile, four-pile and eight-pile working conditions, and the bearing capacity of pile and deformation characteristic are comprehensively analyzed and studied. The results show that the axial force of pile and the side friction play with asynchrony, and the failure mode of the long pile is the pricking destruction, but the short pile is not obvious. Under the composite test of four-pile working condition, the limit value of bearing capacity of the pile is equal to that of the single pile, and the occurrence of the position of the maximum of skin friction is different from that of the single pile. The load-sharing ratio of the long pile is more than that of the short pile. Under the composite test of eight-pile working condition, the load among the corner pile is more than that of the edge pile and center pile under each stage loading, and the bearing capacity and the skin friction of the long piles (corner pile, edge pile) and short piles (center pile) obviously decrease compared with those of the single pile. The load sharing ratio of the corner pile is a little more than that of the edge pile. © 2018, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
语种	中文
出版者	Chinese Society of Civil Engineering
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114736]
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; 730050, China; 2.Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China; 3.College of Civil Engineering, Lanzhou Institute of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Ma, Tian-Zhong,Zhu, Yan-Peng,Ren, Yong-Zhong,et al. Bearing capacity and displacement characteristics of long-short composite piles in loess areas[J]. Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering,2018,40:259-265 and 92.
APA	Ma, Tian-Zhong,Zhu, Yan-Peng,Ren, Yong-Zhong,&Ling, Yong-Qiang.(2018).Bearing capacity and displacement characteristics of long-short composite piles in loess areas.Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering,40,259-265 and 92.
MLA	Ma, Tian-Zhong,et al."Bearing capacity and displacement characteristics of long-short composite piles in loess areas".Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering 40(2018):259-265 and 92.