KORALM RAIL GRAZ – KLAGENFURT
KORALM TUNNEL
WETTMANNSTÄTTEN – ST. ANDRÄ
Lot KAT 2: Construction shaft and construction site installation Leibenfeld
5 The Project
The Koralm tunnel is the central section of the planned double tracked
highspeed railway “Koralmbahn Graz
– Klagenfurt” between Deutschlandsberg and St.Andrä. With a total length
of 32,8 km and a maximum overburden of 1,250 m it will cross the
Koralpe as a base tunnel and will connect the area around Deutschlandsberg with the Lavanttal. The tunnel system consists of two single tubes with
an excavation area of approx. 82 m²
and cross edits every 500 m and an
emergency station in the middle of the
tunnel. The tunnel tubes shall be excavated mainly with tunnel boring
machines, according to actual planning status double shield machines
are foreseen. In March 2002 the section Wettmann-stätten – St. Andrä
including the Koralm tunnel was
handed in for the “Environmental
Impact Assessment”. For further excavation measures 3 pilot tunnels and 1
pilot shaft are foreseen. Start of excavation works of the pilot tunnels was
2004.
5 Geology
Along the first 4 km the Koralm tunnel
passes through tertiary Florian Layer,
consisting of layers of sand-, silt- and
mudstone. Then the tunnel crosses the
disturbed cristalline outskirts of the
Koralpe, which are dominated by partially weathered rock of the sequence
of foliated gneiss-micaschist. About
Geological longitudinal section Koralm
GRAZ
CARINTHIA
STYRIA
KLAGENFURT
WSW
ENE
Railway Station LAVANTTAL
Railway Station WEST STYRIA
Western Portal
Shaft
PAIERDORF
Eastern Portal
Intermediate Access
LEIBENFELD
km 40.0
km 45.0
km 50.0
km 55.0
km 60.0
km 65.0
Pilot tunnel
2,2 km
C 5.3 km
Northern Tube NATM 4.0 km
Southern Tube
km 70.0
8,2 km
TBM 16.0 km
TBM 17,4 km
C total 3.1 km – bench 8.2 km
TBM 10.5 km C 0.6 km
Limit of Construction Lots
km 75.0
10 km behind the portal the tunnel
enters the main cristalline zone and
passes over the next 14 km unweathered sequence of foliated gneiss-micaschist, mylonitic gneisses (“Plattengneis”) and fine grained gneiss. Local
fault zones are to be expected. About
8 km to the western portal the tunnel
passes the 4 km long Lavanttal fault
zones. This fracture zone is characterized by a heterogeneous structure consisting of soft-plastic, clayey disturbed
rock and moderately fractured, resistant rock clods. Tectonic intensity of
the fault zones system is increasing
from east to west, therefore the distance between the fault zones is predicted to decrease in the same way.
Beside the disturbed rock masses material mainly of the foliated gneissmicaschist sequence and of the marble sequences will occur. The remaining 4 km of the Lavanttal Tertiary consists of heterogeneous rock mass with
changing deposits of fine and coarsely
grained soft rock and only poor
cemented, fine grained sediments.
Around the portal area Mitterpichling
mainly homogenous rock mass with
poor cemented sandstone is to be
expected.
5 Pilot Tunnel
In order to get sufficient information
about the Lavanttal fault zones system
as well as the cristalline fault zones of
the outskirts of the Koralpe pilot tunnels are planned to be drilled through
these areas. Besides, the excavation
concept itself and the tunnel boring
machines shall be optimized on the
real geological conditions. Pilot tunnels are foreseen in the following sections:
3 STYRIA: beginning at the intermediate excavation stage of Leibenfeld,
length up to 2,5 km, cross section:
circle shaped, excavation area about
22 m²
3 CARINTHIA: two starting points: one
at the west portal and one 3,6 km
eastwards after a 120 m deep shaft,
total length about 8 km, cross section of the pilot tunnel will be the
crown of the future main tunnel,
excavation area about 40 – 45 m²
TUNNELLING & GEOTECHNICS
AUSTRIA
z
Gra
Railway Station & Crossover
Western Styria
Deutschlandberg
CARINTHIA
Soil Improvement
Freidorfer Gleinz
STYRIA
KORALM TUNNEL
t
fur
gen
Kla
PORTAL STYRIA
INTERMEDIATE ACCESS
LEIBENFELD
EMERGENCY STOP
Cut & Cover Mitterpichling
PORTAL CARINTHIA
Railway Station/Crossover Lavanttal
Overview of the
Koralm tunnel
St. Paul
N
Kartengrundlage: BEV
Geoconsult’s Services
MAIN TUNNEL:
3 Feasibility study, route selection
studies
3 Preliminary design
3 Environmental Impact Assessment:
tunnel planer and coordinator, cost estimates on probabilistic data base, risk
analysis, public relations procedure
3 Hydrogeologic mapping, planning and
performance of Hydro Monitoring
Program, water sampling, analysis
and data processing
3 Tender project based on
§36.1 EisbG,
preparation of tender documents,
final design
3 Detailed design
3 Geotechnical services on site
3 Construction management
PILOT TUNNEL & PILOT SHAFT:
3 Tender design, detailed design,
final design
3 Construction management
3 Geotechnical services on site
3 Control of landfill materials
Shaft entering pilot tunnel Paierdorf
ary
ti
Ter
.1 k
M4
NAT
m
East portal
ine
tall
Crys
rti
ar
y/
tt
van
La
ult
al F a
m
0.5 k
T
BM 1
17.2
km
NO
H
RT
S
ER
T
OU
U
N T
HE
km
TBM
NA
TM
0.
7
Te
TBM
West portal
/e
TM
NA
m
1.2 k
nel 1
y tun
r
o
t
a
r
xplo
5 PROJECT NAME:
KORALM RAIL PROJECT GRAZ – KLAGENFURT
KORALM TUNNEL
5 TYPE OF PROJECT:
Railway tunnel
5 LOCATION:
Styria – Carinthia, Austria
5 CONSTRUCTION COSTS (Civil works):
€ 1.100.000,– (estimated)
5 CLIENT:
ÖBB (Austrian Federal Railway), Austria
5 PERIOD OF SERVICES:
Since 1996
5 PERIOD OF CONSTRUCTION:
Pilot tunnels & shafts: 2004-2009
Main tunnel: 2009-2020
RN
BE
TU
BE
TM
NA
16.2
thia
5:1
km
m
ria
Sty
in
Car
5 PROJECT DATA:
Twin tube single track railway tunnel
Cross adits every 500 m,
Crossover incl. emergency station in tunnel center
Total length: 32,8 km
Max. overburden: 1.250 m
Excavation area: 82 m2
Pilot and ventilation shaft Leibenfeld:
depth: ~ 56,7 m, excavation area: 78,5 m2
Construction shaft Leibenfeld:
depth: ~ 60,7 m, excavation area: ~ 800 m2
Pilot and ventilation shaft Paierdorf:
depth: ~ 120 m, excavation area: 75,5 m2