Evaluation of Rock Slope Deterioration Based on Granite and Schist Rock Slopes

Abstract

The problems of slope instability can be related to the terrain
factors and weather. In Malaysia, slope failures and landslides
are very common due to prolonged monsoon rainfalls. The
consequences of slope instability can be hazardous to life
including economic damages and costly repairs. The study was
aimed to determine the physical and mechanical properties of
the rock slope material from selected sites. Several tests
including field observations were performed to analyze the
engineering characteristic and physical properties of this Schist
rock slope and Granite rock slope. The rock samples were
classified into various weathering grades based on variations in
these properties. Scan line methods were applied to obtain the
measurement data. Direct discontinuity surveys were carried out
in interval of 10 m. Laboratory tests on the samples were done
that include two cycles of slake durability, Schmidt hammer test,
point load test, petrography test, density test and direct shear
box test. The analysis on each rock types showed that the
amphibolite Schist at Putrajaya has the highest rock strength
with a uniaxial compressive strength (UCS) 487.97 Mpa which is
classified as extremely strong rock. By comparison, the UCS
value of Granite was 267.28MPa and classified as strong rock