Citation Search Quick Search
  2017, Vol. 36 Issue (6): 1551-1559    DOI: 10.13722/j.cnki.jrme.2016.0963
Current Issue | Archive | Adv Search |
Measurement and analysis of vertical deformation of stratum induced by quasi-rectangular shield tunneling in soft ground
SI Jinbiao1,ZHU Yaohong2,JI Chang1,ZHOU Shunhua1
(1. Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804,China;
2. Ningbo Rail Transit Group Co.,Ltd.,Ningbo,Zhejiang 315101,China)
Download: PDF (607 KB)   HTML (1 KB) 
Export: BibTeX | EndNote (RIS)      
Abstract  The stratum deformation caused by the quasi-rectangular shield tunneling is different from the circular shield tunneling and the limited research has been carried out to study the issue. The first time application of the quasi-rectangular shield tunnel in soft ground in China was studied and the surface deformation and layered settlement were monitored and analyzed to investigate the major pattern of the vertical stratum deformation. The suggestions for the construction controlling were presented in terms of the deformation mechanism. The results show that the maximum surface settlement is about 50 mm and the range of excavation influence is about 20 m ahead of the excavation face. The vertical displacement of the ground surface experiences four stages over the tunneling period,the slowly down(upward) stage,the rapid upward stage,the rapid down stage and the gently down stage. The surface settlement occurs mainly after the pass of the shield tail,which is caused by the consolidation of the disturbed soft stratum. The main factors for the vertical stratum deformation include the chamber pressure,synchronous grouting and shield posture. The shield posture caused the soil on two sides of the shield machine to move in the opposite directions. In addition,the influence of the shield posture to soil deformation is more significant than in the case of single circle shield tunneling.
Key wordstunneling engineering      quasi-rectangular shield      soft ground      site monitoring      stratum deformation     
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
SI Jinbiao1
ZHU Yaohong2
JI Chang1
ZHOU Shunhua1
Cite this article:   
SI Jinbiao1,ZHU Yaohong2,JI Chang1, et al. Measurement and analysis of vertical deformation of stratum induced by quasi-rectangular shield tunneling in soft ground[J]. , 2017, 36(6): 1551-1559.
URL:  
http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0963      OR      http://www.rockmech.org/EN/Y2017/V36/I6/1551
Copyright © 2005-2015 Edited and Published by Editorial Office for Chinese Journal of Rock Mechanics and Engineering
Sponsored by : Chinese Society for Rock Mechanics and Engineering 
Published by : Science Press 
Address: Wuhan 430071, China  Tel: (027)87199250  Fax: (027)87199250  Email: rock@whrsm.ac.cn
DESIGNED BY: Beijing Magtech Science & Technolgy Development Co.,Ltd.
鄂公网安备 42010602003581号