Investigation on the effects of twin tunnel excavations beneath a road underpass

Excavation of tunnels underneath cities often intrudes the existence of piled foundation and in severe cases, can cause damage to the overlying structures. As there are very limited published case studies concerning understanding of the interaction between piled structure and tunneling, there is a s...

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Main Authors: Namazi, Eshagh, Mohamad, Hisham, Jorat, Mohammad Ehsan, Hajihassani, Mohsen
Format: Article
Published: Oklahoma State University 2011
Subjects:
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author Namazi, Eshagh
Mohamad, Hisham
Jorat, Mohammad Ehsan
Hajihassani, Mohsen
author_facet Namazi, Eshagh
Mohamad, Hisham
Jorat, Mohammad Ehsan
Hajihassani, Mohsen
author_sort Namazi, Eshagh
collection ePrints
description Excavation of tunnels underneath cities often intrudes the existence of piled foundation and in severe cases, can cause damage to the overlying structures. As there are very limited published case studies concerning understanding of the interaction between piled structure and tunneling, there is a significant uncertainty regarding tunnel-pile interaction. In this paper, a case study of the effects of two subway tunnels on the contiguous pile walls which support a road underpass is investigated using three-dimensional Finite Element simulations. The interaction between the tunnels and piles is investigated with a special attention to the effect of tunnel face pressures. Through the numerical modelling and field data, it is shown with presence of the piles, the minimum pressure to support the tunnel face is less than minimum face pressure in the green field condition. Field experience indicates that excessive tunnel face pressure can cause temporary heave to the ground surface but also cause damage to the cutter head of tunnel boring machine.
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spelling utm.eprints-292202019-03-17T03:03:29Z http://eprints.utm.my/29220/ Investigation on the effects of twin tunnel excavations beneath a road underpass Namazi, Eshagh Mohamad, Hisham Jorat, Mohammad Ehsan Hajihassani, Mohsen TA Engineering (General). Civil engineering (General) Excavation of tunnels underneath cities often intrudes the existence of piled foundation and in severe cases, can cause damage to the overlying structures. As there are very limited published case studies concerning understanding of the interaction between piled structure and tunneling, there is a significant uncertainty regarding tunnel-pile interaction. In this paper, a case study of the effects of two subway tunnels on the contiguous pile walls which support a road underpass is investigated using three-dimensional Finite Element simulations. The interaction between the tunnels and piles is investigated with a special attention to the effect of tunnel face pressures. Through the numerical modelling and field data, it is shown with presence of the piles, the minimum pressure to support the tunnel face is less than minimum face pressure in the green field condition. Field experience indicates that excessive tunnel face pressure can cause temporary heave to the ground surface but also cause damage to the cutter head of tunnel boring machine. Oklahoma State University 2011 Article PeerReviewed Namazi, Eshagh and Mohamad, Hisham and Jorat, Mohammad Ehsan and Hajihassani, Mohsen (2011) Investigation on the effects of twin tunnel excavations beneath a road underpass. Electronic Journal of Geotechnical Engineering, 16D . pp. 441-450. ISSN 1089-3032
spellingShingle TA Engineering (General). Civil engineering (General)
Namazi, Eshagh
Mohamad, Hisham
Jorat, Mohammad Ehsan
Hajihassani, Mohsen
Investigation on the effects of twin tunnel excavations beneath a road underpass
title Investigation on the effects of twin tunnel excavations beneath a road underpass
title_full Investigation on the effects of twin tunnel excavations beneath a road underpass
title_fullStr Investigation on the effects of twin tunnel excavations beneath a road underpass
title_full_unstemmed Investigation on the effects of twin tunnel excavations beneath a road underpass
title_short Investigation on the effects of twin tunnel excavations beneath a road underpass
title_sort investigation on the effects of twin tunnel excavations beneath a road underpass
topic TA Engineering (General). Civil engineering (General)
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AT mohamadhisham investigationontheeffectsoftwintunnelexcavationsbeneatharoadunderpass
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AT hajihassanimohsen investigationontheeffectsoftwintunnelexcavationsbeneatharoadunderpass