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Elecrical Tomography and VLF methods contribution to underground wastewater pipe construction

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G. Vargemezis, E. Gerolymatos, A. Aggelopoulos
G. Vargemezis, E. Gerolymatos, A. Aggelopoulos

Abstract


In the area of municipality ofKropia (Attica, Athens) the construction of a tunnel for the transportation of treated wastewater has been decided. The length of the tunnel is approximately 1400 m and it is designed to cross an area at a depth of maximum 100 meters. Geological and tectonic mapping showed the existence of limestone and fault systems zones that are crossing the geological formations. Thus, geophysical survey has been designed in order to provide information about the geological and tectonic status at the proposed area. The application of electrical tomography has been designed in addition with VLF electromagnetic method. The first one was expected to show the geological cross section at the axis designed while the VLF method could provide more detailed information about the fault structures zones at the area. Results of the geophysical survey showed lateral changes of the mechanical behavior of the limestone. In parallel, fault zones that are crossing the axis have been mapped. Considering that engineers need to know the nature of probable problems that they have to deal with, geophysical investigation can provide useful information in a low cost and quick application and contribute to the best decision as concern the final positioning of the tunnel and the penetrating method.


Keywords


Tomography; VLF; tunnel

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References


Cardarelli, E., Marrone, C, and Orlando, L., 2003. Evaluation of tunnel stability using intergrated geophysical methods, Journal ofApplied Geophysics, 52, 93-102.

Cosenza, P., Marmet, E., Rejiba, F., Jun Cui, Y., Tabbagh, Α., and Charlery, Y., 2006. Correlations between geotechnical and electrical data: A case study at Garchy in France, Journal of Applied Geophysics, 60, 165-178.

Friedel, S., Thielen, Α., and Springman, S.M., 2006. Investigation of a slope endangered by rainfall-induced landslides using 3D resistivity tomography and geotechnical testing, Journal of Applied Geophysics, 60, 100-114.

Li, Y., and Oldenburg, D.W., 1992. Approximate inverse mappings in DC resistivity problems. Geophysical Journal International, 109, 343-362.

Nissen, J., 1986. A versatile electromagnetic modeling program for 2-D structures, Geophys. Prospect., 34, 1099-1110.

Rey, E., Jongmans, D., Gotteland, P., and Garambois, S., 2005. Characterisation of soils with stony inclusions using geoelectrical measurements, Journal of Applied Geophysics, 58, 88-201.

Roth, M.J.S., Mackey, J.R., Mackey, C, and Nyquist, J.E., 2002. A case study of the reliability of multielectrode earth resistivity testing for geotechnical investigations in karst terrains, Engineering Geology, 65, 225-232

Sultan, S.,A, Helal, Α., and Santos, F.A.M., 2004. Geoelectrical application for solving geotechnical problems at two localities in Greater Cairo, Egypt, NRIAG Journal of Geophysics, 3(1), 51-64.

Tsourlos, P., 1995. Modeling interpretation and inversion of multielectrode resistivity survey data. Ph.D. Thesis, University of York.


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