Mechanical characteristics plus differential settlement of CFG pile and cement-soil compacted pile about composite foundation under train load

doi:10.12989/gae.2020.20.2.155

IR > 土木工程学院

	Mechanical characteristics plus differential settlement of CFG pile and cement-soil compacted pile about composite foundation under train load
	Cheng, Xuansheng1,2 ; Liu, Gongning 1,2; Gong, Lijun 1,2; Zhou, Xinhai 2; Shi, Baozhen 3
	2020-01-25
发表期刊	GEOMECHANICS AND ENGINEERING
ISSN	2005-307X
卷号	20 期号:2 页码:155-164
摘要	In recent years, the stability, safety and comfort of trains has received increased attention. The mechanical characteristics and differential settlement of the foundation are the main problems studied in high-speed railway research. The mechanical characteristics and differential settlement of the foundation are greatly affected by the ground treatment. Additionally, the effects of train load and earthquakes have a great impact. The dynamic action of the train will increase the vibration acceleration of the foundation and increase the cumulative deformation, and the earthquake action will affect the stability of the substructure. Earthquakes have an important practical significance for the dynamic analysis of the railway operation stage; therefore, considering the impact of earthquakes on the railway substructure stability has engineering significance. In this paper, finite element model of the CFG (Cement Fly-ash Gravel) pile + cement-soil compacted pile about composite foundation is established, and manual numerical incentive method is selected as the simulation principle. The mechanical characteristics and differential settlement of CFG pile + cement-soil compacted pile about composite foundation under train load are studied. The results show: under the train load, the neutral point of the side friction about CFG pile is located at nearly 7/8 of the pile length; the vertical dynamic stress-time history curves of the cement-soil compacted pile, CFG pile and soil between piles are all regular serrated shape, the vertical dynamic stress of CFG pile changes greatly, but the vertical dynamic stress of cement-soil compacted pile and soil between piles does not change much; the vertical displacement of CFG pile, cement-soil compacted pile and soil between piles change very little.
关键词	composite foundation train load mechanical characteristics differential settlement
DOI	10.12989/gae.2020.20.2.155
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51968045][51478212] ; science and technology project in China Railway 12th Bureau Group Co. LTD.[14B-3] ; science and technology project in China Railway Construction Investment Group Co. LTD.[17-C21]
WOS研究方向	Engineering
WOS类目	Engineering, Civil ; Engineering, Geological
WOS记录号	WOS:000508659600007
出版者	TECHNO-PRESS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/64125
专题	土木工程学院
通讯作者	Cheng, Xuansheng
作者单位	1.Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, 287 Langongping Rd, Lanzhou, Gansu, Peoples R China 2.Lanzhou Univ Technol, Western Engn Res Ctr Disaster Mitigat Civil Engn, Minist Educ, 287 Langongping Rd, Lanzhou, Gansu, Peoples R China 3.China Railway 21st Bur Grp Sixth Engn Co LTD, 921 Beibinhe West Rd, Lanzhou, Gansu, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Cheng, Xuansheng,Liu, Gongning,Gong, Lijun,et al. Mechanical characteristics plus differential settlement of CFG pile and cement-soil compacted pile about composite foundation under train load[J]. GEOMECHANICS AND ENGINEERING,2020,20(2):155-164.
APA	Cheng, Xuansheng,Liu, Gongning,Gong, Lijun,Zhou, Xinhai,&Shi, Baozhen.(2020).Mechanical characteristics plus differential settlement of CFG pile and cement-soil compacted pile about composite foundation under train load.GEOMECHANICS AND ENGINEERING,20(2),155-164.
MLA	Cheng, Xuansheng,et al."Mechanical characteristics plus differential settlement of CFG pile and cement-soil compacted pile about composite foundation under train load".GEOMECHANICS AND ENGINEERING 20.2(2020):155-164.