Indexed by:
Abstract:
This paper presents a case analysis of the settlement value of the existing Subway Station during the construction of a new subway station close-attached undercrossing in Beijing, China. A micro-distortion excavation control method is proposed, that is the flat-top straight wall Cross Diaphragm (CRD) + multiple pre-top bracing concealed excavation construction methods. Furthermore, a numerical analysis using a finite difference program, FLAC3D, was conducted to analyze the settlement value of the existing Subway Station. .The results show that the maximum accumulated settlement value distribution was a shape of 'W'; the largest settlement value is 2.96 mm, occurred above 5 drift; The accumulative deformation of the existing station was largest when the excavation of 1-drift and 2-drift was completed; Jacks plays an important role in the active controlling the settlement value of the existing station. The excavation of 1-drift destroys original crustal stress equilibrium, the plastic zone is formed; The plastic zone scope of soil above excavation section is largest, the thickness is about 12.5m. © 2014 ejge.
Keyword:
Reprint Author's Address:
Email:
Source :
Electronic Journal of Geotechnical Engineering
Year: 2014
Issue: T
Volume: 19
Page: 5785-5792
Cited Count:
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0