Renewal & Rehabilitation

Comparison of life cycle costs with and without periodic maintenance

The structural safety and serviceability of underground infrastructure must be ensured throughout its life cycle. Minimal shutdown times, optimal usage of available finances and a long-term plan for measures and investments are at the top of most operators’ wish lists.

As part of the condition assessments, we accompany the value conservation of underground infrastructures, starting with the data acquisition, followed by analysing the data and concluding with designing of any remedial measures. This allows for detailed budget planning and foresighted prioritization of the measures for ensuring operational safety.

Services

Inspection of a road tunnel

We place great emphasis on methodical, structured and seamless recording of the structural condition to enable long-term reliability in planning for you. Costs are provided realistically and transparently, thereby providing a high degree of budget reliability.

PHASE 1 - Preparation

Acquisition of the owner’s data of the structure, such as:
Layout drawings
Detailed drawings
Construction documentation
Engineering documents
Organization & coordination of Phase 2

Use of a touchpad for tunnel inspection

PHASE 2 – Data acquisition

Laser scanning
Visual inspection using high-resolution grey-scale images
Recording of defects on site using TunnelMap recording software on a tablet
Material samples and tests

Visual inspection of the ceiling in a road tunnel

PHASE 3 – Assessment / Analysis

Direct export of the recorded data to a database
Full-coverage surface and clearance envelope analysis
Customizable evaluations and statistical analysis
Inspections of the structure (material tests, detailed structural safety analysis, etc.)

PHASE 4 – Recommendation of measures

Determination of the structural condition
Classification of the tunnel condition
Suggestions for structural measures
Presentation of solution options
Time schedule and cost estimation
Documentation by means of digital inspection data, CAD drawings and documents
Recommendations for further investigation and monitoring
Design and Planning for value conservation and remedial measures
Comprehensive reporting

Competence

Profound knowledge of the procedures, execution and evaluation involved in state assessments
Interdisciplinary collaboration of experts from the fields involved
In-house expertise in digital recording and analysis of data for state assessments (engineering, measurement technology and materials laboratory)
Overall concept for standardized inspections

Benefits

Safeguarding of structural safety and serviceability, thereby ensuring maximum availability
Ensured operational safety
Reduction of shutdown times
Safeguarding of operational safety
Expenditure optimization in logistics
Appraisal as basis for planning, operation and maintenance of a structure
Time savings and comparability of digitally captured data
Complete validation documentation for operating permits from FOT, FEDRO and cantons

Selected references

Project

Lucerne city ring road, Lucerne, Switzerland

Services

Motorway tunnel

Client

FEDRO, Zofingen Office

Project

Charnadüra tunnel, Celerina, Switzerland

Services

Renovation of the 449 m long, single track railway tunnel

Client

Rhätische Bahn AG, Infrastructure

Project

Butzentunnel, Andermatt-Nätschen, Oberalp Pass, Switzerland

Services

Butzen tunnel renovation
Loop tunnel with rack track

Client

Matterhorn Gotthard Bahn Infrastruktur AG (MGB)

Project

Intra-urban, 2-tube road tunnel, 2 and 3 lane, one tube with intermediate ceiling, Switzerland

Services

State assessment, review and recommendation of measures

Client

City of Zurich, Switzerland

Project

Main inspection of 30 Rhaetian Railways tunnels, Switzerland

Services

Survey of defects, damage and changes in the structure or immediate vicinity with the “TunnelMap” software

Client

Rhaetian Railways, Chur

Project

Central Railway tunnel inspections 9 tunnels with a total length of: 7,066 m, Switzerland

Services

Visual inspection, state assessment, scanning and clearance envelope analysis of masonry-wall and reinforced concrete tunnels

Client

zb Zentralbahn AG, Stansstad