Assessment of Rock Slopes Adjacent to Hill Roadways

摘要

The rock slope failure is common in different hill ranges of India. National and state highways aligned throughsuitable rock-slope stretches in mountainous terrain are highly prone to failure and require a set of suitableremedial measures to stabilise them. The great Himalayan mountain is a majestic cluster of several number ofmore or less parallel hill ranges intervened by numerous valleys and extended plateaus. Plate tectonics andevolution of Himalayan rock slope explain the formation of natural rock slopes. Almost all rock slope failuresoccur along pre-existing natural discontinuities or plane of weakness. In rock slope stability problems, theactual failure or sliding surface depends upon spatial orientation, frequency and distribution of the discontinuitiesand the inherent shear strength of filling material in the discontinuities. The paper shall deal with the differenttypes of modem geological and geotechnical investigations for rock slopes, i.e shear strength of rock mass,Rock mass rating (RMR)f Slope mass rating (SMR)t Rock mass quality (Q), Rock defect studies along with otherstudies which will help in finding a set of cost optimised remedial measures for stabilisation of rock slope.