Internal force calculation and supporting parameters sensitivity analysis of side piles in the subway station excavated by Pile-Beam-Arch method

doi:10.1016/j.tust.2016.03.012

CQUET-IR

	Internal force calculation and supporting parameters sensitivity analysis of side piles in the subway station excavated by Pile-Beam-Arch method
	Liu, Xinrong 1,2; Liu, Yongquan 1,2; Qu, Wanbo 3; Tu, Yiliang 1,2
	2016-06
发表期刊	TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
ISSN	0886-7798
卷号	56 页码:186-201
摘要	The Pile-Beam-Arch (PBA) excavation method is widely used in subway station construction for it greatly reduces ground settlement caused by excavation. The stress state of side piles is extremely complex in the supporting system of the subway station excavated by PBA method. This paper deduces the internal force calculation formula for side piles under the most unfavorable loading state with the vertical force considered. Testing apparatus which can model the actual loading state of side piles are designed. Single-factor sensitivity analysis is conducted by means of the reduced-scale model test and numerical simulation to study the three supporting parameters (i.e. pile diameter, pile spacing and buried depth). Results indicate that: the additional bending moment induced by the vertical load at the pile top should be considered in internal force calculation of side piles; values from the deduced theoretical calculation formula agree with the test values; horizontal displacement of the pile body reduces significantly and the bending moment increases greatly with the increase of pile diameter or the decrease of pile spacing; the pile bottom basically meets the constraint condition of the fixed end when the buried depth is two times of the excavation depth. Under the test conditions of this paper, critical sensitivity values of three supporting parameters, i.e. pile diameter, pile spacing and buried depth, are respectively 32 mm, 2d (pile diameter) and 2h (excavation depth). It's more economical and effective to adopt the scheme of increasing pile diameter than the scheme of narrowing pile spacing when there's a high requirement for displacement control of side piles. (C) 2016 Elsevier Ltd. All rights reserved.
关键词	PBA excavation method Side pile Internal force calculation Supporting parameters Model test
DOI	10.1016/j.tust.2016.03.012
收录类别	SCIE
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS记录号	WOS:000375815200019
出版者	PERGAMON-ELSEVIER SCIENCE LTD
原始文献类型	Article
出版地	OXFORD
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.cqcet.edu.cn/handle/39TD4454/3577
专题	重庆电子科技职业大学
作者单位	1.Chongqing Univ, Sch Civil Engn, Chongqing 400045, Peoples R China; 2.Chongqing Univ, Minist Educ, Key Lab New Technol Construct Cities Mt Area, Chongqing 400045, Peoples R China; 3.Chongqing Vocat Inst Engn, Chongqing 400037, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xinrong,Liu, Yongquan,Qu, Wanbo,et al. Internal force calculation and supporting parameters sensitivity analysis of side piles in the subway station excavated by Pile-Beam-Arch method[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2016,56:186-201.
APA	Liu, Xinrong,Liu, Yongquan,Qu, Wanbo,&Tu, Yiliang.(2016).Internal force calculation and supporting parameters sensitivity analysis of side piles in the subway station excavated by Pile-Beam-Arch method.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,56,186-201.
MLA	Liu, Xinrong,et al."Internal force calculation and supporting parameters sensitivity analysis of side piles in the subway station excavated by Pile-Beam-Arch method".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 56(2016):186-201.