Construction Mechanics Behavior Analysis of Pile-strut Supporting Structure of a Subway Deep Foundation Pit

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	Construction Mechanics Behavior Analysis of Pile-strut Supporting Structure of a Subway Deep Foundation Pit
	Zhou, Yong; Wang, Huijun; Zhu, Yanpeng
	2019
发表期刊	Journal of Railway Engineering Society
ISSN	10062106
卷号	36 期号:1 页码:86-92
摘要	Research purposes: The special red sandstone formation seriously affects the construction safety of deep foundation pit in Lanzhou subway station. Therefore, it is urgent to study the construction mechanical behavior of deep foundation pit in the complex environment of special red sandstone. In this paper, based on the site monitoring results and numerical calculation model, taking the pile-strut supporting structure of Lanzhou Metro Line No. 1 Dongfanghong Square Station deep foundation pit as the engineering background, the law of displacement variation of retaining structures, surrounding buildings and surface subsidence is analyzed comparatively. Research conclusions:(1) The results of numerical simulation and field monitoring by comparative analysis indicate that the results are close and have the same change trend, which shows that the results of the analysis to foundation pit excavation supporting by using the birth and death element method can provide effective guidance for the design and construction of deep foundation pit. (2) The maximum value of horizontal displacement pile tip monitored on site is 10.51 mm and is less than the control value of 30 mm, which indicates that the supporting structure of occlusal pile and steel support can effectively control the displacement of Lanzhou special red sandstone formation foundation pit. (3) As foundation pit excavation and supporting continues, the forward heeling curve of pile body gradually becomes the shape of "drum belly" and the location where the maximum measured slope value is 10.56 mm is located near 2/3 times the depth of the excavation. (4) With the continuous excavation of foundation pit, the vertical settlement displacement of the surrounding buildings decreases with the further away from the station. (5) The maximum settlement around the foundation pit located 1/3 times the depth of the pit. (6) The research result can provide guidance for the design and construction of subway deep foundation pit of similar special stratum in Lanzhou. © 2019, Editorial Department of Journal of Railway Engineering Society. All right reserved.
关键词	Computer simulation Excavation Foundations Numerical methods Numerical models Sandstone Structural design Struts Subway stations Subways Construction mechanics Deep foundation pit Design and construction Foundation pit excavations Horizontal displacements Numerical calculation model Site monitoring Surrounding buildings
收录类别	EI
语种	中文
出版者	Editorial Department of Journal of Railway Engineering Society, China
EI入藏号	20191506765916
EI主题词	Piles
EI分类号	408.1 Structural Design, General - 408.2 Structural Members and Shapes - 433.2 Passenger Railroad Transportation - 482.2 Minerals - 483.2 Foundations - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods
来源库	Compendex
分类代码	408.1 Structural Design, General - 408.2 Structural Members and Shapes - 433.2 Passenger Railroad Transportation - 482.2 Minerals - 483.2 Foundations - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/113856
专题	土木工程学院
作者单位	Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China
第一作者单位	甘肃省土木工程防灾减灾重点实验室
第一作者的第一单位	甘肃省土木工程防灾减灾重点实验室
推荐引用方式 GB/T 7714	Zhou, Yong,Wang, Huijun,Zhu, Yanpeng. Construction Mechanics Behavior Analysis of Pile-strut Supporting Structure of a Subway Deep Foundation Pit[J]. Journal of Railway Engineering Society,2019,36(1):86-92.
APA	Zhou, Yong,Wang, Huijun,&Zhu, Yanpeng.(2019).Construction Mechanics Behavior Analysis of Pile-strut Supporting Structure of a Subway Deep Foundation Pit.Journal of Railway Engineering Society,36(1),86-92.
MLA	Zhou, Yong,et al."Construction Mechanics Behavior Analysis of Pile-strut Supporting Structure of a Subway Deep Foundation Pit".Journal of Railway Engineering Society 36.1(2019):86-92.