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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Journal of Geotechnical and Geoenvironmental Engineering - ASCE

ISSN

1090-0241

e-ISSN

—

Svazek periodika

141

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

29

Strana od-do

—

Kód UT WoS článku

000354546400007

EID výsledku v databázi Scopus

2-s2.0-84929687896