NDLI: Monitoring of the stability problems on the Ankara-Konya high speed railway line (Turkey) with ground penetrating radar method

Content Provider	IEEE Xplore Digital Library
Author	Kadioglu, S. Kadioglu, Y.K.
Copyright Year	2015
Description	Author affiliation: Geophys. Eng. Dept., Ankara Univ., Ankara, Turkey (Kadioglu, S.) \|\| Geol. Eng. Dept., Ankara Univ., Ankara, Turkey (Kadioglu, Y.K.)
Abstract	The aim of the study is to research the stability problems of the high speed railway line according to rock properties and their discontinuities such as fractures, faults and karstic cavities between the capital city Ankara and the largest city Konya in Turkey. A bi-static 100 MHz center band shielded antenna was used to take measurements of two dimensional (2D) profile data. Total 35 km was surveyed on different parts of the railway line by considering the results of the geologic research and petrograpical studies. During studies, we gathered the data on the backfilled way on the three parallel profiles spaced 1m apart or on the service way next to the railway line. There was a tunnel on the line. We also gathered two parallel profiles data on the tunnel and four profiles data next to the tunnel to evaluate the stability conditions according to the discontinuities. This paper presented also determining fractures, carstic cavities, faults with their depths on two dimensional (2D) radargram and on transparent 3D GPR data visualization by assigning an opacity function to the amplitude-colour range and view angle. The petrographical studies and GPR results indicated that the areas with Jurassic alloctonous limestones thrusted on the ophiolitic rocks had deep and large fractures and cavities. The resulted radargrams indicated the thrust fault locations under the rail line. This limestone were rootless and did not have big thickness. The radargrams were also revealed the stability conditions of the tunnel on the rail line. There was an important collapsed zone filled up before. However, some part of it was still had a problem. There were approximately horizontal fracture segments under some parts of the tunnel 8m in depth. This fracture were crossed the collapsed zone.
Starting Page	1
Ending Page	4
File Size	1753236
Page Count	4
File Format	PDF
e-ISBN	9781479964956
DOI	10.1109/IWAGPR.2015.7292679
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-07
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ground penetrating radar Geology high speed railway line CRS GPR cavity fracture Earth Three-dimensional displays Data visualization half bird's eye view visualization Rail transportation Cavity resonators tunnel
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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