W artykule zostały przedstawione wyniki uzyskane nieinwazyjną metodą tomografii elektrooporowej (ERT) w rzeczywistych warunkach podczas budowy drogi ekspresowej, które przyczyniło się do rozpoznania gruntów nienośnych, w tym wypadku nasypów niekontrolowanych. Przedstawiona metoda ERT dała wiarygodne wyniki oraz umożliwiła stworzenie przestrzennego obrazu nasypu. Przeprowadzone testy umożliwiły podjęcie decyzji o wymianie całkowitej wysypiska i wbudowaniu gruntów nośnych.
EN
The paper presents results of a non-invasive electro tomography (ERT) in real terms during the construction of the expressway, which contributed to the recognition of collapsible/soft soils – in this case uncontrolled embankments. The ERT method applied in the project, gave reliable results and allowed the creation of a spatial scheme of the embankment. The tests being carried out allowed the decision to replace the landfill and to incorporate hard soils.
In this paper there are presented application of Electrical Resistivity Tomography method (ERT) for the evaluation of slope stability on the example of four pieces of Warsaw slope. The survey was conducted on Bielany at Farysa street, downtown close to Academic Church St. Anne, on Ursynów at Kiedacza Street and at Kokosowa Street. Selected pieces of Warsaw slope differ between therself with soil-water conditions, geometry (a slope angle and height), an urbanized terrain and hazard of landslide. In this paper there are geological cross-section for selected slop pieces, the slop stability index was calculated (F) and ERT measurements. The purpose of this paper is presentation of the processing and interpretation of data received in ERT measurements for more exact description of slop stability.
Geophysical research assists in clarifying the methodology of future building work. The geological structure in terms of lithological variation of Quaternary and older formations was identified in the area of the proposed garage near the ARENAobject in Krakow. In particular, the possibility of the presence of inserts of organic soils was determined. Ground Penetrating Radar (GPR) and Electrical Resistivity Tomography (ERT) were used for more complete and comprehensive recognition of the ground. As a result of the study of the subsurface, thin interbeds of weak bearing organic soils have been found just outside the outline of the planned building. It was found that the Quaternary formations which were identified by geophysical and geotechnical methods are an appropriate ground for direct foundation of the object.
The paper presents three examples of application of geophysical surveys carried out by the PBG Ltd. for the recognition of internal structure, geological background and mechanical properties of near- -surface rock medium at major landslides in the Polish Outer Carpathians. Geophysical data were used for developing an accurate geological model of the landslides. Geological features that cannot be detected by other means, e.g. faults in bedrock, and exact location and shape of the shear plane were delineated in two-dimensional mode on the sections.
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