Imperial College London
Professor Jamie Standing

ProfessorJamieStanding

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Ground Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6072j.standing

 
 
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Assistant

 

Ms Sue Feller +44 (0)20 7594 6077

 
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Location

 

531Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Yu:2017:10.1016/j.tust.2016.10.002,
author = {Yu, J and Standing, J and Vollum, R and Potts, D and Burland, J},
doi = {10.1016/j.tust.2016.10.002},
journal = {Tunnelling and Underground Space Technology},
pages = {161--178},
title = {Experimental investigations of bolted segmental grey cast iron lining behaviour},
url = {http://dx.doi.org/10.1016/j.tust.2016.10.002},
volume = {61},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The need for the research reported in this paper was driven by the Crossrail project in London for which new tunnels were constructed close to numerous existing operational tunnels of the London Underground (LU) network.This research is based on experimental work conducted on half-scale grey cast iron (GCI) tunnel lining segments with chemical composition similar to the Victorian age GCI segments in the LU network. This paper discusses the deformation behaviour of the bolted segmental lining under the influence of factors such as overburden pressure, bolt preload and presence of grommets at small distortions. The measured behaviour of the segmental lining is compared against the calculated response of a continuous lining based on the assumption of elasticity.The industry practice for tunnel lining assessment is to calculate the induced bending moment in the tunnel lining using an elastic continuum model, while adopting a reduced lining stiffness to take into account the presence of the joints. Case studies have recorded that both loosening and tightening of lining bolts have been used as mitigation measures to reduce the impact of new tunnel excavations on existing GCI tunnels.The experimental work on the half-scale GCI lining has shown that a bolted segmental lining behaves as a continuous ring under small distortions imposed when subjected to hoop forces relevant to the depth of burial of LU tunnels. In the presence of hoop force, joint opening was minimal and the magnitude of preload in the bolts had little impact on the behaviour of the lining. It is therefore concluded that disturbance of the bolts in existing tunnels is not recommended as a mitigation measure as in addition to being ineffective it is both time consuming and introduces the risk of damaging the tunnel lining flanges.
AU  - Yu,J
AU  - Standing,J
AU  - Vollum,R
AU  - Potts,D
AU  - Burland,J
DO  - 10.1016/j.tust.2016.10.002
EP  - 178
PY  - 2017///
SN  - 0886-7798
SP  - 161
TI  - Experimental investigations of bolted segmental grey cast iron lining behaviour
T2  - Tunnelling and Underground Space Technology
UR  - http://dx.doi.org/10.1016/j.tust.2016.10.002
UR  - https://www.sciencedirect.com/science/article/pii/S0886779815300985
UR  - http://hdl.handle.net/10044/1/41229
VL  - 61
ER  -
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