Effects of Pillar Depth and Shielding on the Interaction of Crossing Multitunnels

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F15%3A10301914" target="_blank" >RIV/00216208:11310/15:10301914 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0001293" target="_blank" >http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0001293</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0001293" target="_blank" >10.1061/(ASCE)GT.1943-5606.0001293</a>

Result language

angličtina

Original language name

Effects of Pillar Depth and Shielding on the Interaction of Crossing Multitunnels

Original language description

Any new tunnel excavation may damage adjacent existing tunnels in congested cities. To evaluate the impact of new tunnel construction on nearby existing tunnels, a series of three-dimensional centrifuge model tests were conducted with numerical backanalyses using an advanced hypoplasticity constitutive model. The influences of the pillar depth-to-diameter ratio (P/D) on two-tunnel interaction and the effects of shielding on three-tunnel interaction were investigated. The maximum measured settlement of an existing tunnel caused by a new tunnel excavation at P/D of 0.5 underneath was approximately 50% larger than that when P/D was 2.0. This is attributed to a smaller mobilized shear modulus, resulting from a larger reduction in confining stress of soil acting on the invert of the existing tunnel in the former than in the latter. When the new tunnel was excavated underneath two perpendicularly crossing tunnels, the lower existing tunnel "shielded" the upper one from the influence of tunne

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geotechnical and Geoenvironmental Engineering - ASCE

ISSN

1090-0241

e-ISSN

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Volume of the periodical

141

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

29

Pages from-to

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UT code for WoS article

000354546400007

EID of the result in the Scopus database

2-s2.0-84929687896