Evaluation of the Surface Settlement above the Prague Metro Line A Extension Constructed by Two Shields

Kód výsledku v IS VaVaI

RIV/68407700:21110/16:00306520 - isvavai.cz

Výsledek na webu

https://ojs.cvut.cz/ojs/index.php/ap/index

DOI - Digital Object Identifier

10.14311/AP.2016.56.0448

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of the Surface Settlement above the Prague Metro Line A Extension Constructed by Two Shields

Popis výsledku v původním jazyce

The new section of the Prague metro V.A is located in the west part of Prague between stations Dejvická and Motol Hospital. The new metro section is 6.2 km long and has four new stations. Majority of two running tunnels 6.2 km long were excavated by two EPB (Earth Pressure Balance) shields (2 x 4.8 km), it was the first use of modern tunnelling machines in the Czech Republic. Surface settlement above running tunnels caused by EPB shields was regularly monitored. The following paper is focused on evaluation of mentioned surface settlement using volume loss. Consequently numerical modelling of various cross-sections was executed. Modelling was realised by finite element method in 2D using software Plaxis. Two different approaches were applied for modelling of 3D effect in 2D. Important parameters Mstage and Cref were derived for selected cross-sections by back analyses (comparison of numerical modelling results with results of monitoring). Results of realised numerical modelling and volume loss evaluation can be used for preparation and realisation of similar tunnels in similar geology (for example for construction of Prague metro line D which will be probably also excavated by EPB shields).

Název v anglickém jazyce

Evaluation of the Surface Settlement above the Prague Metro Line A Extension Constructed by Two Shields

Popis výsledku anglicky

The new section of the Prague metro V.A is located in the west part of Prague between stations Dejvická and Motol Hospital. The new metro section is 6.2 km long and has four new stations. Majority of two running tunnels 6.2 km long were excavated by two EPB (Earth Pressure Balance) shields (2 x 4.8 km), it was the first use of modern tunnelling machines in the Czech Republic. Surface settlement above running tunnels caused by EPB shields was regularly monitored. The following paper is focused on evaluation of mentioned surface settlement using volume loss. Consequently numerical modelling of various cross-sections was executed. Modelling was realised by finite element method in 2D using software Plaxis. Two different approaches were applied for modelling of 3D effect in 2D. Important parameters Mstage and Cref were derived for selected cross-sections by back analyses (comparison of numerical modelling results with results of monitoring). Results of realised numerical modelling and volume loss evaluation can be used for preparation and realisation of similar tunnels in similar geology (for example for construction of Prague metro line D which will be probably also excavated by EPB shields).

Druh

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

CEP obor

JN - Stavebnictví

OECD FORD obor

—

Projekt

TE01020168: Centrum pro efektivní a udržitelnou dopravní infrastrukturu (CESTI)

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Acta Polytechnica

ISSN

1210-2709

e-ISSN

—

Svazek periodika

56

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

7

Strana od-do

448-454

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85009461460