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

doi:10.12989/gae.2020.20.2.155

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Mechanical characteristics + differential settlement of cfg pile and cement-soil compacted pile about composite foundation under train load
	Cheng, Xuansheng 1,2; Liu, Gongning 1,2; Gong, Lijun 1,2; Zhou, Xinhai 2; Shi, Baozhen 3
刊名	Geomechanics and Engineering
	2020
卷号	20 期号:2 页码:155-164
关键词	Dynamics Earthquakes Fly ash Foundations Mechanical properties Numerical methods Railroad transportation Railroads Soil cement Soils Composite foundations Earthquake action High speed railways Mechanical characteristics Railway operations Vertical displacements Vertical dynamics Vibration acceleration
ISSN号	2005307X
DOI	10.12989/gae.2020.20.2.155
英文摘要	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. © 2020, Techno Press. All rights reserved.
语种	英语
出版者	Techno Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115236]
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, No. 287, Langongping Road, Qilihe District, Lanzhou; Gansu province, China; 2.Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, No. 287, Langongping Road, Qilihe District, Lanzhou; Gansu province, China; 3.China Railway 21st Bureau Group Sixth Engineering Co., LTD., No. 921, Beibinhe west road, Anning District, Lanzhou; Gansu province, China
推荐引用方式 GB/T 7714	Cheng, Xuansheng,Liu, Gongning,Gong, Lijun,et al. Mechanical characteristics + 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 + 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 + differential settlement of cfg pile and cement-soil compacted pile about composite foundation under train load".Geomechanics and Engineering 20.2(2020):155-164.