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Application of the conductive method in the engineering geology: Ruczaj district in Kraków, Poland, as a case study

Klityński Wojciech, Oryński Szymon, Dinh Chau Nguyen

Acta Geophysica

2019

Vol. 67, no. 6

1791--1798

The Ruczaj district in Kraków is the potential building area of high flat blocks for inhabitants. This area is built of the gypsum basement covered by the soil and impermeable clay beds with several meters of thickness. The flat blocks must be set on the textured gypsum layer. In the result of the rainfall and static pressure of the blocks, the water with SO42− increases up to the groundwater level, become the great threat for the flat blocks. The water creates specific hydrogeological conditions occurring in the zone of the building’s foundations. To eliminate the mentioned threat, we should determine precisely the thickness of the soil and impermeable clay as well as the depth of the gypsum basement. Based on the electromagnetic parameters of the geological formations, the Ground Conductivity Meter and DC resistivity methods were used to solve the mentioned problems.

Rozpoznanie złoża piaskowców budowlanych z wykorzystaniem geofizycznych badań elektrooporowych i georadarowych

Klityński W., Stelmach K., Stefaniuk M., Karczewski J.

Przegląd Geologiczny

2014

Vol. 62, nr 10/2

621--628

The paper presents the application of Vertical Electrical Sounding (VES) and Ground Penetrating Radar (GPR) into recognition of the geometry and vertical differentiation of a deposit of color sandstones that are commonly used as elevation stones in building industry. The investigations covered sandstones of Lower Cretaceous age (Albian) that occur at the foothills of the Che³mo Mt. near Kolonia Grabowie (Radomsko district, £ódŸ province). The former quarry of Grabowie is situated in the forest area of the landscape park and this blocked further exploitation from the documented deposit. On a limited scale sandstone is still quarried form the southern edge of the old quarry. However, poor recognition of the deposit hampers the effective exploitation. The objective of the geological investigations was to examine a new part of the deposit including identification of the roof and the bottom of sandstone complex, the thickness of overlying rocks, location of faults and weathered zones, as well as recognition of the lithology down to a depth of 8 m below ground surface. Resistivity distribution in the study area was assessed with the use of VES. Much higher resistivity of sandstones as compared to surrounding rocks was advantageous. Owing to high resolution GPR, the deposit boundaries could be delineated and the stratification within the sandstone complex could be represented. The investigations resulted in construction of 2D models of the deposit and surrounding rocks and gave information on the lithology.