Application of electrical resistivity imaging and land surveying in the analysis of underground construction impact on the Warsaw Scarp
Journal Title: Studia Quaternaria - Year 2016, Vol 33, Issue 2
Abstract
The paper presents the analysis of the II Underground Line construction’s impact on the Warsaw Scarp with the use of the electrical resistivity imaging (ERI, also known as the electrical resistivity tomography) and further total station po- sition measurements. The underground passes under the scarp perpendicular in the area of Dynasy Street 6, in Down- town district. The electrical resistivity imaging was performed for recognition of the geological structure and a poten- tial landslide surface or zone. The gradient system was used during the prospection. In these analyses, the longitudinal section was 40 m long, and the depth of survey amounted to 6 m. In the case of the 200 m long transverse section, the resulted depth of survey was 30 m. The geophysical image of the longitudinal section, does not contain loosening soil zones, which could indicate slip surface. Next, total station measurements, which were tied to the archival geodetic ob- servations’ results, were carried out. The aim of the measurements was to verify the activity of the horizontal and ver- tical displacements. The TBM excavation process led to summary vertical displacements up to approx. 24 mm and horizontal displacements amounting to approx. 13 mm. To sum up, the current land surveys reveals minor underground line’s construction impact on the scarp displacement. Nevertheless, the sensitive urban environment requires further monitoring, especially that the operation loads can result in displacement rate change.
Authors and Affiliations
Łukasz Kaczmarek, Radosław Mieszkowski, Marek Woźniak, Tomasz Dybciak
Keywords
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- EP ID EP360594
- DOI 10.1515/squa-2016-0008
- Views 34
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