Rock slope stability along road cut of Kulikawn to Saikhamakawn of Aizawl, Mizoram, India

Abstract

Landslide is a natural hazard which carries water, mud, debris and sometimes large boulders. Earthquakes, heavy rainfall and tectonic forces are natural responsible factors for landslides, whereas overpopulation and rapid development in the hilly region are unnatural factors which involve human activities such as construction/maintenance of roads, highways, railways and buildings by the unplanned excavation of rock slopes. Both natural and unnatural factors have been accountable for the increase in the probability of landslides in the past few decades. In the present study, stability analysis of rock slopes has been carried out along Kulikawn to Saikhamakawn road section of Aizawl. Kinematic analysis has been performed to identify the road cut slopes which have the potential to fail, and mainly two types of failures were found, i.e., wedge and topple failure. In order to check the stability of road cut slopes, Geological Strength Index, slope mass rating (SMR) and continuous slope mass rating (CoSMR) have been used in this study. Numerical modelling has also been performed to assess the stability of the road cut slope. The maximum displacement of 0.79 m with a maximum velocity of 0.78 m/s has been found for rock slope at location L1 using numerical modelling which confirms the finding from kinematic analysis, SMR and CoSMR analysis.

An Adaptive Identification Method for Potential Landslide Hazards Based on Multisource Data

“…Scientists have used geophysical exploration, geologically related methods, optical remote sensing, microwave remote sensing, and airborne light detection and ranging (LiDAR) to recognize landslides from their morphology, deformation, form, etc., to intelligently identify potential landslide hazards [7,[9][10][11][12][13][14][15][16]. Geophysical exploration methods and geologically related methods focus on landslide structures and their motion processes using displacement models, critical acceleration models, semiempirical approaches, numerical methods, and related physical exploration equipment to determine the distribution of potential landslide hazards [13,[16][17][18][19][20].…”

Slope stability assessment along Indian Himalayan National Highway NH-154A

“…The stabilized original and modi ed slopes are required for the constructional activities of the new transport corridors (Sharma et al 2013). The road cut slope stability can get affected because of the improper methods applied for constructing and widening of the highway stretches in the mountanous regions (Singh et al 2013;Sardana et al 2019). Hence the geotechnical studies are important to understand the geological conditions beofore the construction of any project like dam, tunnel, and road etc.…”

Stability analysis of rock slope along selected road sections from Gutane Migiru town to Fincha sugar factory, Oromiya, Ethiopia

“…With respect to the hard rock, the failure commonly occurs along the discontinuity planes [1,4,10]. Similarly, unevenly oriented discontinuities in a rock mass can cause slope instability along with the road cut [11]. The rock-cut failure is deeply associated with extreme rainfall and the occurrence of major tectonic faults or small-scale discontinuities [5].…”