Specific aspects of engineering-geological models in Croatian karst terrain
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Published:
Oct 31, 2013
Keywords:
Engineering geological model, karst, limestones, anisotropy, weathering, Croatia
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Abstract
The experiences of developing engineering geological models in karst areas for designing and construction purposes prove the necessity of considering at least three basic submodels: sedimentological, structural-tectonic and the weathering one. The research presented here deals with very important and frequently neglected segments in each of the submodels. Therefore, particular attention should be directed to: better understanding of carbonate sediment deposition,determination of environment and diagenetic processes, study of the 3D anisotropy of discontinuity frequency, and differentiation of weathering zones. The given data and examples elaborate and justify such an approach, which enables a more realistic detailed engineering model, more reliable evaluations of the engineering geological/geotechnical parameters and real site conditions.
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References
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PRIEST, S.D. & HUDSON, J.A. (1981): Estimation of Discontinuity Spacings and Trace Length Using Scan-line Survey.- International Journal of Rock Mechanics and Mining Sciences, 18, 183-197.
SEN, Z. (1984): RQD models and fracture spacing.- Journal of Geotechnical Engineering, ASCE 110/2, 203-216.
WALTHAM, A.C. & FOOKES, P.G. (2003): Engineering classification of karst ground conditions. Quarterly Journal of Engineering Geology and Hydrogeology, 36, 101-118.
BIENIAWSKI, Z.T. (1973): Engineering classification of jointed rock masses.- Transactions of the South African Institution of Civil Engineers, 15, 335-344.
COLLINSON, J.D. & THOMPSON, D.B. (1989): Sedimentary structures.- Unwin Hyman, Boston-Sydney-Wellington, 207 p.
DUNHAM, R.J. (1962): Classification of the carbonate rocks according to depositional texture.- Classification of carbonate rocks American association of petroleum geologists Mem., 1, 108-121.
FLÜGEL, E. (1982): Microfacies analysis of limestones.- Springer-Verlag, Berlin-Heidelberg, 633 p.
FOLK, R.L. (1959): Practical petrographic classification of limestones.- Bulletin of American Association of Petroleum Geologysts, 43, 1-38.
FOOKES, P.G. & HAWKINS A.B. (1988): Limestone weathering: its engineering significance and a proposed classification scheme.- Quarterly Journal of Engineering Geology, 21, 7-31.
HARRISON, J.P. (1999): Selection of threshold value in RQD assessments.- International Journal of Rock Mechanics and Mining Sciences, 36, 673–685.
HUDSON, J.A. & PRIEST, S.D. (1983): Discontinuity Frequency in Rock Masses.- Int J Rock Mech Min Sci & Geomech Abstr, 20/2, 73-89.
KULHAWY, F.H. (1978): Geomechanical Model for Rock Foundation Settlement.- Journal of Geotehnical Engineering Division, ASCE 104, No. GT2, Proc. Paper, 13547, 211-228.
MATIČEC, D., FUČEK, L. & OŠTRIĆ, N (1997): Tunnel “Velebit”- Geotechnical report; Sedimentological investigations.- Unpubl. Professional report, Institute of Geology, arch. no. 63/97.
MATIČEC, D. (2009): Krški Dinaridi.- In: Tumač Geološke karte Republike Hrvatske 1:300000, Hrvatski geološki institut, Zagreb, 141 p.
PRIEST, S.D. & HUDSON, J.A. (1976): Discontinuity Spacings in Rock.- Int J Rock Mech Min Sci & Geomech Abstr, 13, 135-148.
PRIEST, S.D. & HUDSON, J.A. (1981): Estimation of Discontinuity Spacings and Trace Length Using Scan-line Survey.- International Journal of Rock Mechanics and Mining Sciences, 18, 183-197.
SEN, Z. (1984): RQD models and fracture spacing.- Journal of Geotechnical Engineering, ASCE 110/2, 203-216.
WALTHAM, A.C. & FOOKES, P.G. (2003): Engineering classification of karst ground conditions. Quarterly Journal of Engineering Geology and Hydrogeology, 36, 101-118.