The role of geophysical ERT method to evaluate the leakproofness of diapragm wall of deep foundation trenches on the example of the construction of retail and office complex in Lublin, Poland

• Autorzy: Pacanowski G. , Czarniak P. , Bąkowska A. , Mieszkowski R , Welc F

Identyfikatory

DOI

10,2478/squa-2014-0009

• Języki publikacji: EN

Abstrakty

EN

This paper addresses the problem of assessing the leakproofness of the bottom of a deep foundation trench, secured by cavity wall, using geophysical methods of electrical resistivity tomography. The study was conducted on a large construction project in Lublin, in a place where there are complicated soil-water conditions: the groundwater level is above the proposed depth of foundation trench, the subsoil is heterogeneous, and there are karsted and weathered carbonate sediments with confined aquifer below the bottom of the trench. A hydraulic fracture occurred at the bottom of the trench during the engineering works, which caused the water flow into the trench. In order to recognize the soil-water conditions the first stage of geophysical measurements of electrical resistivity tomography (ERT) was made. The applied methodology allowed to determine the extent of the hydraulic fracture zone within the bottom of foundation trench. In order to assess the leakproofness of Diaphragm Wall the geophysical ERT measurements were repeated (stage 2) A clear reduction in the value of the electrical resistivity of soils in the area of hydraulic fracture was caused by clay injection. The results of ERT measurements are discussed and graphically presented.

Słowa kluczowe

EN

electrical resistivity tomography ERT; hydraulic fracture; clay injection; foundation trench; complicated soil-water conditions

• Wydawca: Institute of Geological Science Polish Academy of Science
• Czasopismo: Studia Quaternaria
• Rocznik: 2014
• Tom: Vol. 31, Nr 2
• Strony: 91--99
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Pacanowski G.

• Polish Geological Institute – National Research Institute, Rakowiecka 4, 00-975 Warsaw, Poland

autor

Czarniak P.

• Polish Geological Institute – National Research Institute, Rakowiecka 4, 00-975 Warsaw, Poland

autor

Bąkowska A.

• University of Warsaw, Faculty of Geology, Institute of Hydrogeology and Engineering Geology,Żwirki i Wigury 93, 02-089 Warsaw, Poland

autor

Mieszkowski R

• University of Warsaw, Faculty of Geology, Institute of Hydrogeology and Engineering Geology,Żwirki i Wigury 93, 02-089 Warsaw, Poland

autor

Welc F

• Instytut Archeologii Uniwersytet Kardynała Stefana Wyszyńskiego, ul. Woycickiego 1/3, no. 23, 01-938 Warszawa, Poland

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