Two-dimensional modeling of tunnel excavations enhanced by convergence measurements

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F11%3A00309269" target="_blank" >RIV/68407700:21110/11:00309269 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Two-dimensional modeling of tunnel excavations enhanced by convergence measurements

Popis výsledku v původním jazyce

The study presents a modification to conventional finite element method in plane strain conditions to address the problem of successive excavation of linear parts of tunnels. First the convergence confinement method is discussed followed by the introduction of so called 2D3D finite element model. The model takes advantage of convergence curves in the longitudinal direction obtained by extensometric measurement during excavation, both in front of and behind the tunnel heading. It is therefore possible to extend the general formulation into 3D whilst maintaining the two dimensional format of the finite element mesh. A profile corresponding to city road tunnel Blanka in Prague and the corresponding convergence measurement is examined to verify the method. The results show that the method provides reasonably accurate results when compared to convergence confinement method without the need to subjectively determine the lambda parameter. It also significantly reduces the computational time of more accurate but complex 3D analysis thus allowing for the use in stochastic analysis. Civil-Comp Press, 2011.

Název v anglickém jazyce

Two-dimensional modeling of tunnel excavations enhanced by convergence measurements

Popis výsledku anglicky

The study presents a modification to conventional finite element method in plane strain conditions to address the problem of successive excavation of linear parts of tunnels. First the convergence confinement method is discussed followed by the introduction of so called 2D3D finite element model. The model takes advantage of convergence curves in the longitudinal direction obtained by extensometric measurement during excavation, both in front of and behind the tunnel heading. It is therefore possible to extend the general formulation into 3D whilst maintaining the two dimensional format of the finite element mesh. A profile corresponding to city road tunnel Blanka in Prague and the corresponding convergence measurement is examined to verify the method. The results show that the method provides reasonably accurate results when compared to convergence confinement method without the need to subjectively determine the lambda parameter. It also significantly reduces the computational time of more accurate but complex 3D analysis thus allowing for the use in stochastic analysis. Civil-Comp Press, 2011.

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/TA01030245" target="_blank" >TA01030245: Nástroje pro spolehlivé navrhování a realizaci tunelů v městské zástavbě s důrazem na bezpečnost a životnost</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the Thirteenth International Conference on Civil, Structural and Environmental Engineering Computing

ISBN

978-1-905088-45-4

ISSN

1759-3433

e-ISSN

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Počet stran výsledku

1

Strana od-do

222-222

Název nakladatele

Civil-Comp Press Ltd

Místo vydání

Stirling

Místo konání akce

Chania

Datum konání akce

6. 9. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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