Geotechnical News - March 2011 - page 33

Geotechnical News March 2011 33
GEOTECHNICAL INSTRUMENTATION NEWS
procedure which disregards all the
effects previously listed can lead to
significant overestimation of stresses.
References
T. Collotta, G. Barbieri, M. Mapelli
(2010) “Shotcrete Tunnel Linings
with Steel Ribs: Stress Redistribu-
tion due to Creep and Shrinkage”,
Proc. 3rd Intern. Conf. on Engineer-
ing Developments in Shotcrete,
New Zealand.
Comité Euro-International du Béton
(CEB), 1991. CEB-FIP Model
Code 1990. Final Draft, CEB Bul-
letin d’Information, N. 203, July
1991, Lausanne.
Ghali, A., Favre, R. & Elbadry, M.,
2002. Concrete Structures. Stresses
and Deformations, 3rd ed., Spon
Press, London & New York.
Roberto Acerbis, Geotechnical
Engineer, SPEA SpA, Via G. Vida 11
Milan (Italy), tel. (+39) 02 28007268,
roberto.acerbis@spea.autostrade.it
Harry Asche. Technical Leader
Tunnels, Aurecon, 32 Turbot Street
(Locked Bag 331)
Brisbane Queensland 4001
Australia, tel. (+61) 7 3173 8808,
ascheh@ap.aurecongroup.com
Guido Barbieri, Head of Geotechnical
Monitoring and Engineering
Analyses Office, SPEA SpA, Via G.
Vida 11 Milan (Italy), tel. (+39) 02
28007466,guido.barbieri@spea.
autostrade.it
Tiziano Collotta, Head of Geoengi-
neering Department, SPEA SpA,
Via G. Vida 11 Milan (Italy),
tel. (+39) 02 28007475,
email:tiziano.collotta@spea.auto-
strade.it
Table 1. Ring beam - computed axial forces
Ring N1
[kN]
N2
[kN]
N3
[kN]
N4
[kN]
N5
[kN]
N5/N1
[-]
III 1415 1600 2425 2740 3950 2.8
Table 2. Tunnel lining - computed axial forces
Sez.. N1
[kN]
N2
[kN]
N3
[kN]
N4
[kN]
N5
[kN]
N5/N1
[-]
1.1-1.2 1650 1985 3290 3645 3645 2.2
2.1-2.2 1240 1580 2170 2585 2585 2.1
3.1-3.2 190 515 580 1095 1095 5.7
4.1-4.2 2100 2440 3830 4155 4155 2.0
5.1-5.2 2530 2865 4634 4925 4925 2.0
Data
Acquisition
Real-time
multi-sensor
alarms
Open interface
Compatible with global
information management
systems
Data management
Open database,
tags & logbook,
flexible access
Intuitive interface
Web, GIS, 3D, smartphone
Data Import
Any source
Innovation by:
For more information, contact geoscope@soldatagroup.com
Or visit our website: www.soldatagroup.com
system
Single hub for
all your data
Open information