Institut für Geotechnik und Tunnelbau Euro Summerschool
INNSBRUCK 29 September - 3 October 2003

Tunnel refurbishment

Anton W. ACKERMANN, Christopher HUNT
Amberg Consulting Eng., Ltd., Tunnel Refurbishment Dept.

The refurbishment of existing tunnels enables aging infrastructure to fulfill modern technical, operational and economic demands while continuing to guarantee safety. The topics of tunnel inspection, failure mechanisms, planning of structural maintenance, scheduling, costs and case studies such as the enlargement of railway cross sections will provide insight into important refurbishment considerations.

Problems of TBMs in water bearing ground

Babendererde Ingenieure, Lübeck

Tunnelling in water saturated ground is always a challenge for crews and engineers. Limitations in access into the working chamber, once the TBM is started, requires from the contractor special precautions and preparations for the success of the project. Case studies of troubled TBM projects and how they were overcome.

Geotechnical Field Measurements in Underground Construction

Prof. Helmut BOCK
Q + S Consult, Bad Bentheim

Traditional convergence measurements and modern geodetic deformation monitoring, derivation and evaluation of load bearing capacity of tunnel linings from surveying and stress monitoring data, high-definition measurements: surface and tunnel extensometers, deflectometers and inclinometers. Control of drill-and-blast excavation profile by tunnel scanner (e.g.~DIBIT), control of drillhole deviation in ground freezing tunnelling, real-time monitoring and feedback signals for compensation grouting in inner-city tunnelling beneath settlement-sensitive buildings, integrated geotechnic-geodetic-structural monitoring for control of full-face tunnel boring machine.

Geophysical investigations

Prof. Günther BORM
GeoForschungsZentrum Potsdam

The Integrated Seismic Imaging System ISIS provides high resolution seismic images of the rock mass ahead of a tunnel face. Features of the system are the newly developed repetitive impact or vibroseismic sources which can easily be fixed at tunnel boring machines. An interactive software package enables online data acquisition, processing, 3D-visualisation, and geological interpretation.

Soft ground tunnel design

Prof. Chris CLAYTON University of Southampton

Obtaining parameters, analyses (3D, modelling the construction process, constitutive models and their effects, etc.) and monitoring.

Numerical simulations

Institute of Theoretical and Applied Mechanics, Czech Academy of Sciences, Prague

An overview of practically useful constitutive equations for soils and rocks. Advantages and limitations of particular ground models with respect to applications in tunnelling will be emphasized, and the role of these models in numerical codes will be discussed.

Design of Support

Prof. Dimitrios KOLYMBAS
Head of the Institute of Geotechnical and Tunnel Engineering, University of Innsbruck

Mathematical approximations based on simplified models provide an insight into the mechanisms of shotcrete and rockbolt support. The equations obtained will enable us to assess the role of the parameters involved and make rough estimations for the required support. Such formulas can also serve as the basis for observational method.

What tends to go wrong in tunnelling

Inaugural president of International Tunnelling Association

Uncertainty attends all tunnelling, where it may develop to hazard (an unwelcome event) and then to risk (the consequences of such event.) Discontinuity of the control of a project enhances the risk; failure to reassess the risk with new information or improve interpretation is another factor. To be illustrated by examples.

Quality in tunnelling

Claudio OGGERI
Politecnico di Torino, Dipartimento Georisorse e Territorio

Because of the particular types of construction used, quality in tunnelling measure expected results in terms of time, costs and use of the underground construction. The various phases, from planning to operation, should follow guidelines for operating staff, for the use of proper design methods, correct construction techniques and finally for safe operation.

Forepoling and Ground Reinforcing

Prof. Daniele PEILA
Politecnico di Torino, Dipartimento Georisorse e Territorio

General aspects on ground reinforcement in tunnelling. The differences between various techniques and the main aspects of functioning. Forepoling or steel pipe umbrella: general description of the technique and of the setup procedure. Design concepts.

Estimating groundwater inflow into hard-rock tunnels

Chief Tunnel Geologist, Jordan, Jones & Goulding, Inc., Norcross

Estimating inflow into hard-rock tunnels is controlled mainly by the permeability of the rock mass and the potentiometric head around the tunnel. Of the two, rock-mass permeability is by far the more variable and difficult to characterize. Rock-mass permeability is best evaluated as a statistical distribution based on large numbers of tests along the tunnel alignment with emphasis placed on known fracture zones and other areas likely to cause high inflows.

Design-build contracts for tunnel construction

Vice president and director of underground services with Shannon & Wilson, Inc., Seattle; Underground Technology Research Council

Several owners/agencies, unhappy with cost overruns and schedule shifts associated with standard design-bid-build contracts, have proceeded with design-build contracting in the hopes that there will be less risk of claims and legal entanglements with the single source responsibility that is part of the design-build process. Other owners are assessing design-build as a means for accelerating the tunnel project delivery process while potentially reducing owner risks and ultimate project costs. Recently, the U.S. Federal Transportation Administration has elected to implement design-build contracting approaches on five major demonstration projects. Several other European owners have experimented with design-build formats on major tunnel projects. This presentation will discuss case history data for several design-build tunnel projects, noting changes in cost and schedule during the course of the project. It will also discuss likely pros and cons for the owner, contractor and designer in a design-build contracting approach for the construction of tunnels.

Cost management of large projects - on the example of Vereina tunnel

Amberg Ingenieurbüro AG Sargans

Cost management and control starts with the definition of expected quantities. An important subject is the contractual determination and regulation of price rises. The daily registration of services is an important instrument for cost control and provides a means for measurement in case for cost overrun.

Fire protection in tunnelling

Head R\&D VSH VersuchsStollen Hagerbach AG

Constructive protection, fire induced damage, fire loads, testing methods, protection systems, fire detection, fire fighting. The lecture will be accompanied by video records of fire and extinguishing tests.

The conference centre Seehof (4 km from Innsbruck) offers secluded and attractive accommodation with possibilities for outdoor activity. The costs for accommodation and food totals 50 Euro per person and per day (i.e. 250 Euro for 5 days).Information on Innsbruck and Tyrol is available on the internet:

Participation fees: 470,- EURO
To be paid after notification of acceptance. The amount includes participation, coffee breaks and lecture notes.

Participants from Czech Republic, Estland, Hungary, Lettonia, Lithuania, Poland, Slovakia, Slovenia need not to pay the participation fees.

To subscirbe, please send an email to including your name, address, affiliation and age.
Deadline for registration: February 28, 2002

Deadline for registration: 28 February 2003
Notification of acceptance : 31 March 2003

Tunnelling is not an art -- the exclusive domain of the few -- but the application of a sophisticated technology that can be mastered just like any other engineering discipline. But as tunnelling continues to boom, the flood of innovations is not always reflected in university teaching. This school is designed to help those newly qualified or employed in the field to stay ahead, by providing access to the latest thinking and processes from a rare collection of the worlds leading authorities.

DI Markus Maehr
University of Innsbruck
Institut for Geotechnical and Tunnelling Engineering
Technikerstrasse 13
A-6020 Innsbruck
Tel.: ++43/512/507-6682
Fax: ++43/512/507-2996
RaTun_instructions.pdf Instructions for the authors (46 kb)
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