Rock Slope Stabilization and Protection for Roads and Multi-Storey Structures in Jabal Omar, Saudi Arabia

Authors: Ibrahim Abdel Gadir Malik, Dafalla Siddig Dafalla, Abdelazim Ibrahim

Abstract:

Jabal Omar is located in the western side of Makkah city in Saudi Arabia. The proposed Jabal Omar Development project includes several multi-storey buildings, roads, bridges and below ground structures founded at various depths. In this study, geological mapping and site inspection which covered pre-selected areas were carried out within the easily accessed parts. Geological features; including rock types, structures, degree of weathering, and geotechnical hazards were observed and analyzed with specified software and also were documented in form of photographs. The presence of joints and fractures in the area made the rock blocks small and weak. The site is full of jointing; it was observed that, the northern side consists of 3 to 4 jointing systems with 2 random fractures associated with dykes. The southern part is affected by 2 to 3 jointing systems with minor fault and shear zones. From the field measurements and observations, it was concluded that, the Jabal Omar intruded by andesitic and basaltic dykes of different thickness and orientation. These dykes made the outcrop weak, highly deformed and made the rock masses sensitive to weathering.

Keywords: Rock, slope, stabilization, protection, Makkah.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1339183

References:

[1] Attewell, P. B., 1993. The role of engineering geology in the design of surface and underground structures. In Hudson, J. A. (Ed.) Comprehensive rock engineering. Pergamon Press, Oxford, Vol. I, PP. 111-154.
[2] Basahel, H. M., (2008) Rock mass quality and stability analysis of rock cuts at Makkah city, Saudi Arabia. King Abdulaziz University. FES. Jeddah.
[3] Bieniawski, Z. T., 1973. Engineering classification of jointed rock masses. Trans. S. Afr. Civ. Engrs, Vol. 15, No. 12, pp. 335-344.
[4] Bieniawski, Z. T., 1974. Geomechanics classification of rock masses and its application in tunneling. Proc. 3rd Int. Congr. On Rock Mech., Denver, pp. 27-32.
[5] Bieniawski, Z. T., 1976. Rock mass classification in rock Engineering Proc. Symp. On Expl. For Rock Eng., Johonsburg, PP. 97-104.
[6] Bieniawski, Z. T., 1989. Engineering rock mass classification. John Wiley and Sons, New York, USA. 251 P.
[7] Brown, G. F., and Jackson, R. O., 1960. The Arabian Shield: 21st International Geological Congress. Copenhagen. Proceeding. Section 9. pp. 69-77.
[8] Brown, G. F., Bouge, R. G., and Maclean, W. H., 1963. Geology of the Southern Hijaz Quaderangle Survey. Miscellaneous Geologic Investigation, Map I-210A.
[9] Goodman, R. E., 1976. Method of geological engineering in discontinuous rocks, West Publishing Company. Minnesota. pp. 472.
[10] Hoek, E. and Brown, E. T., 1980, Underground excavations in rock: Institution of Mining and Metallurgy, London, 1980.
[11] Hoek, E. and Bray, J. W., 1981, Rock slope engineering. 3rd Edition, IMM, London, 358 p.