Influence of Benoto bored pile construction on nearby existing tunnel: A case study

doi:10.1016/j.sandf.2018.11.006

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	Influence of Benoto bored pile construction on nearby existing tunnel: A case study
	Gao, Guoyao 1,2; Zhuang, Yan 1,3; Wang, Kangyu 4; Chen, Liang 5
刊名	SOILS AND FOUNDATIONS
	2019-04
卷号	59 期号:2 页码:544-555
关键词	Lateral displacement Benoto bored piles Existing tunnel Construction technology Case study
ISSN号	0038-0806
DOI	10.1016/j.sandf.2018.11.006
英文摘要	The monitoring and analysis of lateral displacement for metro tunnels are very important because the metro systems are the lifeline of metropolises. This paper presents a case study of a site in Nanjing, China, where the Benoto bored piles were constructed nearby the existing tunnel. The construction technology, a combination of the Benoto bored piles construction and the conventional construction technology of circulating slurry, is illustrated in detail. The lateral displacement at six test sections were measured and discussed to assess the impact of piles installation on the stability and integrity of the existing tunnel. The measured results showed that during the construction period using the Benoto method, relatively large lateral displacement occurred at the depth with soft soil (Mucky silty clay), with characteristics including a large void ratio, high plasticity, poor permeability, high water content, low shear strength, and low modulus of deformation. During the construction period of the conventional Circulating-Slurry method, negative lateral displacement occurred below the tip of the casing due to the soil arching effect, indicating an inward movement towards the Benoto bored piles. The maximum lateral displacement decreased as the distance between piles and inclinometers increased, with a maximum difference of 45% at the end of the measurements. It was also observed that the measured maximum lateral displacement was less than the cumulative trigger value of 20 mm, indicating an effectiveness of Benoto bored piles constructed adjacent to existing tunnel. This case study may provide the means for a qualitative assessment for engineering constructions where the situation bears similarities. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
资助项目	Natural Science Foundation of Jiangsu Province[BK20151495]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	JAPANESE GEOTECHNICAL SOC
WOS记录号	WOS:000471727100023
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32021]
专题	兰州理工大学
通讯作者	Wang, Kangyu
作者单位	1.Southeast Univ, Sch Civil Engn, Key Lab RC & PRC Struct, Educ Minist, 2 Sipailou, Nanjing 210096, Jiangsu, Peoples R China 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Gansu, Peoples R China 3.Changsha Univ Sci & Technol, Natl Engn Lab Highway Maintenance Technol, Changsha 410114, Hunan, Peoples R China 4.Zhejiang Univ Technol, Sch Civil Engn & Architecture, Hangzhou 310014, Zhejiang, Peoples R China 5.Hohai Univ, Geotech Res Inst, Key Lab, Minist Educ Geomech & Embankment Engn, 1 Xikang Rd, Nanjing 210098, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Gao, Guoyao,Zhuang, Yan,Wang, Kangyu,et al. Influence of Benoto bored pile construction on nearby existing tunnel: A case study[J]. SOILS AND FOUNDATIONS,2019,59(2):544-555.
APA	Gao, Guoyao,Zhuang, Yan,Wang, Kangyu,&Chen, Liang.(2019).Influence of Benoto bored pile construction on nearby existing tunnel: A case study.SOILS AND FOUNDATIONS,59(2),544-555.
MLA	Gao, Guoyao,et al."Influence of Benoto bored pile construction on nearby existing tunnel: A case study".SOILS AND FOUNDATIONS 59.2(2019):544-555.