Abstract: The soft hard alternating bedded rock slopes often experience sliding failures along the soft rock layer due to the formation of weak structural planes induced by the weathering or the softening of soft rock in contact with water. A high and steep rock slope was formed by excavation at a cement plant in Jinan. The rock type of the slope is mainly composed of shale and limestone from the Gushan Formation of the Jiulong Group. The shale is in a thin layer, severely weathered, and prone to degrade to soils when encountering water. It is a weak layer, and the inclination of the rock layer is similar to that of the slope, with an inclination angle smaller than that of the slope. The current stability status of the slope is investigated and analyzed. Hazards such as the falling blocks on the slope surface, cracks at the top of the slope, and water leakage during the rainy season are addressed. The mitigation measures include vertical beams, ground anchor with shotcrete support, and interception and drainage measures to comprehensively mitigate the slope stability issue. After one year of operation, the slope deformation meets the specifications and design requirements, and the treatment effect is satisfactory, which has a reference significance for similar projects.

Key words: Soft and Hard Rock Interbedding, Lattice beams, anchor cables