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

Eshagh Namazi, Hisham Mohamad, Mohammad Ehsan Jorat, Mohsen Hajihassani

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)441-450
Number of pages10
JournalElectronic Journal of Geotechnical Engineering
Volume16
Issue numberD
Publication statusPublished - 2011
Externally publishedYes

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Underpasses
Excavation
Tunnels
excavation
tunnel
road
pile
Piles
damage
heave
TBM
Subways
effect

Cite this

Namazi, Eshagh ; Mohamad, Hisham ; Jorat, Mohammad Ehsan ; Hajihassani, Mohsen. / Investigation on the effects of twin tunnel excavations beneath a road underpass. In: Electronic Journal of Geotechnical Engineering. 2011 ; Vol. 16, No. D. pp. 441-450.
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Investigation on the effects of twin tunnel excavations beneath a road underpass. / Namazi, Eshagh; Mohamad, Hisham; Jorat, Mohammad Ehsan; Hajihassani, Mohsen.

In: Electronic Journal of Geotechnical Engineering, Vol. 16, No. D, 2011, p. 441-450.

Research output: Contribution to journalArticle

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