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The Project

Geology

Geoconsult has been awarded by

BAMCO JV (Vinci, Strabag and

Hidepitö) with the detailed design of

all underground structures related to

Gellert Station of the Budapest Metro

Line 4 Project. The underground struc-

tures of Gellert Station are located

under a heavily built up area and are

constructed in accordance with the

principles of the New Austrian Tun-

nelling Method (NATM). The under-

ground structures consist of two plat-

form tunnels and a concourse tunnel

in between. It also has a crossover

structure and several complicated ven-

tilation structures intersecting the run-

ning tunnels, which are excavated by

TBM (tunnel boring machine). A cros-

sover structure is located at the wes-

tern end of Gellert Station.

Gellert Station is situated at the west-

ern bank in immediate vicinity of the

river Danube.

The geological conditions at Gellert

Station and the Crossover consist of

(from top to down):

Made ground

Fine sandy silt

Sandy gravel

Sandy clay

Fractured, compact clay (Kiscelli clay)

Tunnel excavation is mainly restricted

to the clay strata. Groundwater level is

approximately between 3 m to 7 m

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below ground level. The clay itself is

basically considered impermeable

and has quite good strength parame-

ters. However, due to faults and fis-

sures in the clay, a groundwater

drawdown from the upper layers has

been considered for the crossover

structure.

Special design solutions had to be

developed for the excavation of plat-

form and concourse tunnels. As the

cross sections of these three structures

overlap each other, pillar tunnels were

designed to allow for an abutment of

the final tunnel structures. In the pillar

tunnels, concrete pillars with large

openings allow for passenger traffic

between platform and concourse tun-

nel were concreted before excavation

of the platform tunnels.

For the ventilation tunnels, it was

� Key Design Aspects

H U N G A R Y

decided to use a sprayed inner con-

crete lining in favour of a conven-

tional inner concrete lining.

For all structures, extensive numerical

analyses were performed in course of

development of the detail design. In

additions a coupled ground water

analysis was done to verify measured

surface settlements with design

assumptions and to allow for surface

settlement predictions above the

crossover structure due to dewatering.

This Instrumentation and Monitoring

Plan is related to the Project's under-

ground section and covers the whole

construction period.

It includes monitoring of groundwater

levels, surface settlements and ground

movements in the vicinity of excava-

tions, bored tunnel and ground treat-

ment zones, movements of existing

structures, buildings, roads and pave-

ments, deflections of retaining walls

in station boxes, cut-and-cover tun-

nels and annexed structures, deforma-

tions of bored tunnel linings, and

movements of utilities and services as

well as specifications of proposed

monitoring equipment, reading fre-

quencies, monitoring control values

and monitoring process management.

The Instrument and Monitoring Plan

has been developed to meet the fol-

lowing key objectives:

Verify the assumptions made in the

design of permanent and temporary

structures of the Project

� Instrumentation andMonitoring

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3 D View of Gellert Station

Gellert Station Layout (Plan View)

6.83 6.55

3.68

10

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Construction Tolerance 5cmMegengedett építési t rés 5cmű

min. required clearance Profileaz építmény min. bels határvonalaő

Waterproofing System 3cmVízszigetel rendszer 3cmő

Inner Lining di=30cmL ttbeton falazat di=30cmő

Shotcrete C25/30 di=20cmL ttbeton falazat di=20cmő

Shotcrete C25/30 di=30cmL ttbeton falazat di=30cmő

Shotcrete C25/30 di=20cmL ttbeton falazat di=20cmő

Shotcrete C25/30 di=30cmL ttbeton falazat di=30cmő

Segmental Lining di=30cm

Grouting Material

Lean Concrete

40

40

Tübbing falazat di=30cm

Kitölt habarcső

Soványbeton

Inner Lining di=30cmL ttbeton falazat di=30cmő

Shotcrete C25/30 di=20cmL ttbeton falazat di=20cmő

Shotcrete C25/30 di=30cmL ttbeton falazat di=30cmő

Kitölthabarcs

ő

GroutingMaterial

Segmental Lining di=30cmTübbing falazat di=30cm

Construction Tolerance 5cmMegengedett építési t rés 5cmű

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Expansion jointExpansion joint

Expansion jointExpansion joint

hm

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entilationT

unnel-West

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unnel

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GELLERT STATION

SZELL Z ALAGÚT - NYUGATI OLDALŐ Ő

CUT & COVERCONCOURSE TUNNEL

RIGHTTRACK

LEFT TRACK

RUNNING TUNNEL

RUNNINGTUNNEL

JOBBVÁGÁNY

VONALALAGÚT

CSARNOKALAGÚT

GELLÉRT ÁLLOMÁS

RÉSELT M TÁRGYŰ

BAL VÁGÁNY

VONALALAGÚT

VENTILATION TUNNEL - WEST SIDE

LEFT TRACKRUNNING TUNNEL

BAL VÁGÁNYVONALALAGÚT

RIGHT TRACKRUNNING TUNNEL

JOBB VÁGÁNYVONALALAGÚT

10

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0.200.20

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40

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5.95

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7.3

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7.3

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PILLAR TUNNEL RIGHT

PILLAR TUNNEL LEFT

PERONALLAGÚT BAL

PERONALLAGÚT JOBB

P1

P2

P5

P4

P11

P13

P14

P15P16P6

rtc40+00,000

P3

P12

Running Tunnel

Station Box

Concourse Tunnel

Concrete Pillars

Plattform Tunnel

toward

s FövámTér

toward

s Móric

z Zs.

METRO BUDAPEST – GELLERT STATION

TUN

NE

LLIN

G&

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PROJECT:

TYPE OF PROJECT:

LOCATION:

PROJECT DATA:

METRO BUDAPEST – GELLERT STATION

METRO STATION

Budapest, Hungary

Two platform tunnels:

Length: approx. 55 m; excavation cross section: 70 m

Concourse tunnel:

Length: approx. 25 m; excavation cross section: 55 m

Ventilation tunnels:

Cross sections: 30 m – approx. 70 m

Crossover structure:

Cross section: max. 130 m

2

2

2 2

2

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CLIENT:

CONTRACTOR:

OWNER:

PERIOD OF SERVICES:

CONSTRUCTION TIME:

BAMCO JV (Vinci, Strabag, Hidepitö)

BAMCO JV (Vinci, Strabag, Hidepitö)

DBR Metro

2006 – 2009

3 years

Geoconsult’s Services�

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Preparation of Tender Design for

Contractor

Detailed design for underground

station structures

Surface Settlement Prediction

along entire alignment of

TBM running tunnels of Metro

Line 4

General Consultancy Services

during Construction

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Provide confirmation of the pre-

dicted behaviour of the support sys-

tem during excavation and tunnel-

ling

Provide sufficient information for

assessment of construction effects of

the project works on buildings, ser-

vices and other adjacent structures

within the zone of influence

Provide a general record of perfor-

mance

Enable construction to be carried out

safely at every stage

Identify development of critical situa-

tions at early stages such that where

required, appropriate contingency or

remedial measures can be enabled

and implemented in time

The underground structures of Gellert

Station consist of two approx. 55 m

long platform tunnels with an excava-

� Key Project Data

tion cross section of 70 m². Between

the platform tunnels the concourse tun-

nel is located. This concourse tunnel

has a length of approx. 25 m and an

excavation cross section of 55 m². At

the intersection between platform and

concourse tunnels concrete pillars with

large openings for passenger traffic

have been constructed. These concrete

pillars are heavily reinforced as they

serve as abutment for primary and final

lining of platform and concourse tun-

nels.

At both ends of the underground sta-

tion ventilation tunnels are intersecting

the running tunnels. Cross section of

the ventilation tunnels vary between

30 m² and approx. 70 m² in the inter-

section areas with the running tunnels.

A crossover structure is located at the

western end of Gellert station, which

has a maximum cross sectional size of

130 m².

Budapest

Location of project

Coupled Analysis for Crossover: PorewaterPressure Development (interim construction stage) Concourse Tunnel

Headwall of Platform Tunnel andswitchover to Running Tunnel