Abstract
This paper describes a new set of design charts which have been compiled to assist in the preliminary analysis of excavated slopes in Saudi Arabia. Data for thechart&were collected from Al-Dilaa and Al-Juwah descents. Both stable and unstable slopes Were assessed utilizing rock mass classification systems, basic mapping, and index tests, so that the basic geotechnical features of the stabfe and unstable rock masses could be defined. Furthermore, date were supplemented by a study of the stability of slopes together with the remedial and support measures. The parameter known as volumetric joint count (Jv) is found to be sensitive to the performance of slopes in hard Saudi Arabian rocks. Correlation with either overall slope height or overall slope angle provides useful design charts for roads cuts. The charts could be zoned, with each zone being ascribed a likely combination of support measures. Furthermore, it is also suggested that the constructed charts could pro- I vide quick assessmento the design, construction, maintenance and safety requirements of rock slopes excavated in the mountainous terrain of Saudi Arabia along the Red Sea.
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