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
PBN-AR
Instytucja
Wydział Geologii (Uniwersytet Warszawski)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Studia Quaternaria
ISSN
1641-5558
EISSN
2300-0384
Wydawca
Instytut Nauk Geologicznych PAN
DOI
Rok publikacji
2014
Numer zeszytu
2
Strony od-do
91-99
Numer tomu
31
Identyfikator DOI
Liczba arkuszy
2.00
Autorzy
(liczba autorów: 5)
Pozostali autorzy
+ 3
Słowa kluczowe
en
Electrical Resistivity Tomography (ERT)
hydraulic fracture
clay injection
foundation trench
complicated soil-water conditions.
Streszczenia
Język
en
Treść
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 weath ered 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.
Cechy publikacji
ORIGINAL_ARTICLE
Inne
System-identifier
515564
CrossrefMetadata from Crossref logo
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