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http://dx.doi.org/10.7843/kgs.2009.25.11.53

Assessment of Rockmass Damage around a Tunnel Using P Wave Velocity Tomography  

Park, Chul-Soo (Korea Railroad Research Institute)
SaGong, Myung (Korea Railroad Research Institute)
Mok, Young-Jin (Kyunghee Univ.)
Kim, Dae-Young (Hyundai Institute of Technology and Quality Development)
Publication Information
Journal of the Korean Geotechnical Society / v.25, no.11, 2009 , pp. 53-60 More about this Journal
Abstract
Construction of a tunnel induces rock masses damage around the tunnel. The degree of damage produced on rock masses will affect on the mechanical and hydraulic behaviors of the rock masses. In this paper, P wave velocity measured by cross-hole test was used to assess rock masses damage around the test tunnel. Initiation of source signal was carried out using mechanical impact at the source installed borehole. In consequence, the generated P wave signal was low noise and apparent wave form, which allows accurate pick-up of first arrival time. From the test, the region where rock damage is expected shows relatively low P wave velocity. In addition, with multiple points of P wave velocity measurement along each cross-hole, two dimensional P wave tomography was obtained. The tomography provides apparent view of the rock damage behind the tunnel. The measured P wave velocity was correlated with features of rock masses, porosity and Q value.
Keywords
Cross-hole test; P wave velocity; Rockmass damage; Tomography;
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1 Balland, C., Morel, l., Armand, G., and Pettitt, W. (2009), "Ultrasoinc velocity survey in Callovo-Oxfordian argillaceous rock during shaft excavation", international Journal of Rock Mechanics and Mining Sciences, Vol.46, pp.69-79   DOI   ScienceOn
2 Falls S. D., and Young, R. P. (1998), "Acoustic emission and ultrasonic-velocity methods used to characterise the excavation disturbance associated with deep tunnels in hard rock", Tectonophysics, Vol.289, pp.1-15   DOI   ScienceOn
3 Fahimifar, A., and Ranjbamia, M (2009), "Analytical approach for the design of active grouted rockbolts in tunnel stability based on convergence-confinement method", Tunnelling and Underground Space Technology, Vol.24, pp.363-375   DOI   ScienceOn
4 Martino, J. B., and Chandler, N. A. (2004), "Excavation-induced damage studies at the Underground Research Laboratory", International Journal of Rock Mechanics and Mining Sciences, Vol.41, pp.1413-1426   DOI   ScienceOn
5 Meglis I. L., Martin C. D., and Young, R. P. (2005), "Assessing in situ microcrack damage using ultrasonic velocity tomography", International Journal of Rock Mechanics and Mining Sciences, Vol.42, pp.25-34   DOI   ScienceOn
6 Mok, Y. J. (1987), Analytical and Experimental Studies of Borehole Seismic Methods, Ph. D. Dissertation, The University of Texas at Austin
7 Park, K. H., and Kim, Y. J. (2006), "Analytical solution for a circular opening in an elastic-brittle-plastic rock", International Journal of Rock Mechanics and Mining Sciences, Vol.43, pp.616-622   DOI   ScienceOn
8 Park, C. S., Lim, l. Y., Choi, C. L., Kong, B. C., and Mok, Y. J. (2008), "Recent Development of Borehole Seismic Tests", Proceeding of The 14th World Conference on Earthquake Engineering (CD-ROM), October 12-17, 2008, Beijing, China
9 Sousa, L. M. O., del Rio, L. M. S., Calleja, L., de Argandona, V. G. R. and Rey, A. R. (2005), "Influence of microfractures and porosity on the physico-mechanical properties and weathering of ornamental granites", Engineering Geology, Vol.77, pp.153-168   DOI   ScienceOn
10 Tronicke, J., Tweeton, D. R., Dietrich, P., and Appel, E. (2001), "Improved Crosshole Radar Tomography by using Direct and Reflected Arrival Times", Applied Geophysics, Vol.47, pp.97-1005   DOI   ScienceOn
11 Roblee, C. J. (1990), Development and Evaluation of a Tomographic Seismic Imaging Techniques for Characterization of Geotechnical Sites, Ph. D. Dissertation, The University of Texas at Austin, pp.680
12 Fuhriman, M. D. (1993), Crosshole Seismic Tests at Two Northern California Sites Affected by the i989 Lorna Prieta Earthquake, Master Thesis, The University of Texas at Austin
13 Barton, N. (2002), "Some new Q value correlations to assist in site characterization and tunnel design", International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstract, Vol.39, pp.185-216   DOI   ScienceOn
14 Martin, C. D., Read, R. S., and Martino, J. B. (1997), "Observations of brittle failure around a circular test tunnel," International Journal of Rock Mechanics and Mining Sciences, Vol.34, No.7, pp.1065-1073   DOI   ScienceOn
15 Hoar, R. J., Stokoe, K. H. II. (1978), "Generation and Measurement of Shear Wave in situ," Dynamic Geotechnical Testing, ASTM STP 654, ASTM, pp.3-29
16 정연문, 이명성, 송명준, 우익, 이영남 (1996), "지오레이다 토모그래피를 이용한 굴착에 의한 암반물성 변화에 관한 연구", 한국지반공학회 1996 가을학술발표회 논문집, pp.115-122
17 Carranza-Torres, C., and Fairhurst, C. (1999), "The elasto-plastic response of underground excavations in rock masses that satisfy the Hoek-Brown failure criterion", International Journal of Rock Mechanics and Mining Sciences, Vol.36, pp.777-809   DOI   ScienceOn
18 Carranza-Torres, c., and Diederichs, M (2009), "Mechanical analysis of circular linters with particular reference to composite supports. For example, liners consisting of shotcrete and steel sets", Tunnelling and Underground Space Technology, Vol.24, pp.506-532   DOI   ScienceOn
19 Tweeton, D. R., Jackson, M. J., and Roessler, K. S. (1992), BOMCRATRA-A Curved Ray Tomography Computer Program for Geophysical Application, USBM RI 9411
20 목영진, 백영식, 임수빈 (1998), "탄성파 시험을 이용한 그라우팅 성과 평가", 한국지반공학회 봄학술발표회 논문집, pp.85-92