Mechanical characteristics plus differential settlement of CFG pile and cement-soil compacted pile about composite foundation under train load
Cheng, Xuansheng1,2; Liu, Gongning1,2; Gong, Lijun1,2; Zhou, Xinhai2; Shi, Baozhen3
2020-01-25
Source PublicationGEOMECHANICS AND ENGINEERING
ISSN2005-307X
Volume20Issue:2Pages:155-164
AbstractIn 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.
Keywordcomposite foundation train load mechanical characteristics differential settlement
DOI10.12989/gae.2020.20.2.155
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaEngineering
WOS SubjectEngineering, Civil ; Engineering, Geological
WOS IDWOS:000508659600007
PublisherTECHNO-PRESS
Citation statistics
Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64125
Collection土木工程学院
Corresponding AuthorCheng, Xuansheng
Affiliation1.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
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
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.
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