Integrated geophysical approach for the detection of underground voids in a construction site

Orfanos, C; Apostolopoulos, G; Amolochitis, G; Leontarakis, K

dc.contributor.author	Orfanos, C	en
dc.contributor.author	Apostolopoulos, G	en
dc.contributor.author	Amolochitis, G	en
dc.contributor.author	Leontarakis, K	en
dc.date.accessioned	2014-03-01T02:51:43Z
dc.date.available	2014-03-01T02:51:43Z
dc.date.issued	2008	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35609
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-70450207239&partnerID=40&md5=5d865a3d3cbdda1f8ca08b164b769857	en
dc.subject.other	Areas of interests	en
dc.subject.other	Construction sites	en
dc.subject.other	Detection of voids	en
dc.subject.other	Geophysical methods	en
dc.subject.other	Geophysical models	en
dc.subject.other	Geophysical surveys	en
dc.subject.other	Karstic	en
dc.subject.other	Loose materials	en
dc.subject.other	Microgravity survey	en
dc.subject.other	Resistivity tomography	en
dc.subject.other	Specific areas	en
dc.subject.other	Underground voids	en
dc.subject.other	Engineering exhibitions	en
dc.subject.other	Microgravity processing	en
dc.subject.other	Petroleum engineering	en
dc.subject.other	Radar antennas	en
dc.subject.other	Surveys	en
dc.subject.other	Three dimensional	en
dc.subject.other	Tomography	en
dc.subject.other	Geophysics	en
dc.title	Integrated geophysical approach for the detection of underground voids in a construction site	en
heal.type	conferenceItem	en
heal.publicationDate	2008	en
heal.abstract	During the excavation for the construction of a multi-store building in the centre of Athens, underground voids were encountered in a compact limestone with karstic zones. Some voids are full of loose material. Three geophysical surveys (GPR, ERT and microgravity) applied for a quick detection of the underground. Analyzing the results of each method, for the detection of voids, GPR is a quick method to start locating areas of interest, with the resistivity tomography defining all features of the underground with the correct positioning if a 3D approach is applied. The identification of a void is better applied with a microgravity survey correlating with the results of the previous surveys. In order to diminish the equivalence in the geophysical models, to eliminate the artifacts and generally to improve the reliability and the accuracy of geophysical interpretation, an overall geophysical approach was followed using the three different geophysical methods. Karstic zones with loose material and possibly filled or small opened voids inside the compact rock were outlined. Specific areas were outlined, where all three geophysical methods indicate that opened voids possibly exist.	en
heal.journalName	Society of Petroleum Engineers - 70th European Association of Geoscientists and Engineers Conference and Exhibition - Incorporating SPE EUROPEC 2008	en
dc.identifier.volume	5	en
dc.identifier.spage	2959	en
dc.identifier.epage	2963	en