4.2 Utveckling av metodik för samtolkning av geofysik och annan georelaterad information vid undermarksbyggande

4.2 Development of a methodology for joint interpretation of geophysics and other geo related data in underground infrastructure projects

 

Integrerad användning och tolkning av data från geofysiska och icke-geofysiska metoder för planering och byggande i berg

 

Integrated use and interpretation of data from a large number of investigations – geophysial as well as non-geophysical data - is crucial for all infrastructure planning and construction in rocks.

Unforeseen ground conditions is a risk factor often leading to large delays and extra costs in large underground infrastructure projects. This project aims at develop a methodology and tools for integrated use of all geotechnical data used in large underground infrastructure projects, for example geophysics, in situ methods and core drillings . It also includes test and demonstration of these tools. The joint interpretation will be used for design a methodology, a workflow, on how to investigate the soil and rock volume for optimal overall efficiency.

The methodology will be tested in pinpointed tunnel projects. The final result will be a prognosis model of the soil and rock properties.

 

The activities will include development of algorithms and software for joint interpretation, pilot tests and full-scale implementation of geo modelling in on-going projects. The general aim is to develop tools that in an objective, robust and repeatable way can create geological and geotechnical models by using the different sources of information in a statistically optimized way. Boreholes and geotechnical sounding and sampling give point information whereas geophysics most often create information in 2D or 3D, however with higher uncertainty than the point investigations. By combining the different sources in a joint interpretation procedure the overall uncertainty can be lowered and hence give more precise geo models.

In addition, a methodology for predicting rock mechanical properties from the geo models will be produced. Calibration of algorithms and models will be carried out both against synthetic models and real data from on-going infrastructure projects.

All work with the joint interpretation software will be a continuation of existing algorithms in close cooperation with international researcher in the field.

 

 

 

 

 

Vision

 

Develop and implement techniques for combining geophysical and other geo related data for determination of rock mechanical properties in a more efficient and objective way than today. Aiming at creating better data for decision makers resulting in more cost efficient infrastructure projects.

Team

 

Torleif Dahlin - contact

Professor, Engineering Geology, Lund University

Roger Wisén

PhD, Engineering Geology, Lund University

Mathias Ronczka

PhD, Engineering Geology, Lund University

Kristofer Hellman

Researcher, Engineering Geology, Lund University

Thomas Günther

PhD, LIAG (Leibnitz Institute of Applied Geophysics)

 

 

Aims

 

• Improved methods for joint interpretation of geophysical and other data in order to determine rock mechanical properties.

• Improved support for better decision makers within a project, clients etc

• Risk reduction (decrease the risk for delays, costs and claims)

• Research at highest international level

 

W H E R E I N D U S T R Y M E E T S A C A D E M I A

Reference Group

 

Per Tengborg, BeFo

Robert Sturk, Skanska

Andreas Pfaffhuber, NGI

Malin Norin, NCC

Christel Karlsson, SGI

Lena Persson, SGU

Johanna Gottlander, TRV

 

Funding