Assessment of tunnel stability in layered ground

Scarpelli, Giuseppe; Burghignoli, A.; Caporaletti, P; Taylor, R.N.

doi:10.1201/9780203879986.ch86

Geotechnical Aspects of Underground Construction in Soft Ground 2008

DOI: 10.1201/9780203879986.ch86

|View full text |Cite

Assessment of tunnel stability in layered ground

Giuseppe Scarpelli¹,

A. Burghignoli²,

P Caporaletti³

et al.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2016

Publication Types

Select...

Article1

Relationship

Self Cite0

Independent1

Authors

Journals

Cited by 1 publication

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

1-g model tests of tunnels with a surrounding cement-treated soil ring

Zulkefli

Tan

Lee

et al. 2016

JGS Special Publication

View full text Add to dashboard Cite

The construction of large diameter tunnels can be challenging, especially in soft soil conditions. Stability intervention by means of ground improvement has been identified as a possible method to allow for the safe construction of such tunnels. A 1-g physical model study of the stability of a tunnel with a cement-treated soil layer surrounding it, along with related failure loads and mechanisms, is reported here. The failure mechanism of such tunnels is found to be very different from conventional tunnels with no ground improvement as cement-treated soil is very brittle. Failure occurs locally, with cracks developing in the tensile region in the cement treated layer. These cracks consistently occur at the crown, springline and invert, over a range of improved soil layer thickness-to-tunnel diameter (t/D) ratio. These cracks are also distinctly flexural tensile in nature. Prior to the onset of cracking, the deformation of the tunnel is minimal. This in turn results in a negligible settlement trough. This implies that caution is needed on the use of ground movement as a measure of the strength mobilization, owing to the lack of warning signs. The stability of such tunnels is found to be related to the t/D ratio and strength of the improved soil layer, while the significance of the unimproved surrounding soil is found to be minimal. This leads to the formulation of a new stability equation.

show abstract

1-g model tests of tunnels with a surrounding cement-treated soil ring

Zulkefli

Tan

Lee

et al. 2016

JGS Special Publication

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Assessment of tunnel stability in layered ground

Cited by 1 publication

References 1 publication

1-g model tests of tunnels with a surrounding cement-treated soil ring

1-g model tests of tunnels with a surrounding cement-treated soil ring

Contact Info

Product

Resources

About