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 | |
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 | |
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. |
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