2.1 Geoelektrisk kartläggning för förundersökning av underjordisk infrastruktur i urban miljö

2.1 Geoelectric mapping as a tool for preinvestigation for underground infrastructure facilities in urban environment

 

 

Unstable rock, groundwater inflow and other unforeseen ground conditions is a risk factor not seldom causing delays and large extra costs in underground infrastructure projects. In order to handle such risks better knowledge about the soil-, rock- and groundwater conditions, soil contaminants and unknown underground constructions is needed.

 

Preinvestigations prior to large underground infrastructure projects are most often based on drillings. Drillings produce detailed information in single boreholes but no information between those. However, modern geophysical methods can map the underground in 3D in a time and cost efficient way also between boreholes. Lately especially combined use of the two methods resistivity and time domain induced polarization (DCIP) have shown great potential for underground infrastructure preinvestigations. However urban environment is a great challenge due to urban noise and therefore the DCIP technique needs to be further studied and developed.

 

This project aims to adapt and configure the DCIP technique for use in urban areas, by develop: data collection methodology, instrument (hardware), data processing, inversion technique and understanding of the relation between geophysical and geotechnical and environmental properties.

 

Detailed project planning and strategies for handling of risks will ensure the success of the project and the spreading of the results achieved.

 

Main activities:

 

• Developing technique for handling of urban noise and obstacles

• Develop methodology for 3D surveys in urban area

• Improve knowledge on how to interpret contaminated soils from geoelectrical methods

• Improve detailed interpretation of geological features

 

Download leaflet in Swedish here

 

Vision

 

To improve the potential for geophysical methods to interpret ground conditions with respect to geology, groundwater, structures and pollution in urban environment, in order to achieve more cost effective construction of infrastructure.

Team

 

Torleif Dahlin - contact

Professor, Engineering Geology, Lund University

Charlotte Sparrenbom

PhD, Geology Dept., Lund University

Per-Ivar Olsson

Lic.Eng., Engineering Geology, Lund University

Sara Johansson

Lic. Eng., Engineering Geology, Lund University / Tyréns AB

Matteo Rossi

Post doc, Engineering Geology, Lund University

Håkan Rosqvist

PhD, Geology Dept., Lund University / Tyréns AB

Mats Svensson

PhD, Tyréns AB

David Hagerberg

PhD, Tyréns AB

Esben Auken

Professor, Dept of Geoscience, Aarhus University

Gianluca Fiandaca

Assistant Professor, Dept of Geoscience, Aarhus University

Mehrdad Bastani

PhD, Swedish Geological Survey

Per Hedblom

Developer, ABEM Instrument AB / Guideline Geo AB

 

Aims

 

• Adaption of DCIP imaging. Development and adaptation of DCIP imaging for use in urban environments; adaptation of data acquisition strategies and methodology and data processing.

 

• Prototype instruments. Developing prototype DCIP equipment for time and cost efficient acquisition of data for description of the subsurface in three dimensions (3D).

 

• 3D inversion of DCIP. Development of algorithms for 3D inversion of DCIP data. The software will build on the novel algorithms for 1D and 2D inversion by Fiandaca et al (2012).

 

• Engineering and environmental properties. Investigation of possible correlations between geophysical and engineering/environmental key parameters, e.g. soil conditions, tectonic structures, waste as well as water and contaminant occurrence and transport.

 

• Integration in TRUST. Integration of all the TRUST sub-projects, for building up a holistic survey method, together with model and data visualisation for a smart underground construction.

 

• Dissemination. Dissemination of the results to authorities, industry and academy.

Movie - TRUST 2.1 Geoelektrisk kartläggning för förundersökning av underjordisk infrastruktur i urban miljö

 

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

Roger Wisén, Rambøll A/S

 

Scientific Advisory Group

 

Lee Slater

Professor, Hydrogeophysics, Rutgers University, New Jersey, USA

 

Andy Binley

Professor, Hydrogeophysics, Lancaster University, UK

 

William Powrie

Professor, Geotechnical Engineering, University of Southampton, UK

Funding