Modification of slope mass rating (SMR) by continuous functions

Kainthola

Geomatics, Natural Hazards and Risk

2013

The study involves the characterization of rock mass along the right bank of river Sutlej, Luhri, Himachal Pradesh. This road connects to several important locations and therefore blockage due to slope failure may cause several problems. Lack of proper geotechnical/geological investigations has led to cutting of the natural hill slopes with improper design. The subsequent road cut slope has made this zone highly vulnerable and a threat to local commuters. The concerned area has varying lithology which are highly jointed and exposed all along the road cuts. The unrestrained slope in this zone is prone to recurrent failures due to high precipitation and seismicity, eventually causing loss of life and property. Therefore, the study helps in understanding the behaviour and mode of failure of the cut slope through geometrical relationship between structural discontinuities and surface topography. Several important parameters were determined to quantify the region based on available and widely used rockmass characterization techniques to develop a proper understanding. This will ultimately help in designing appropriate remedial measures to such vulnerable zones that will prevent further slope failure and resulting damage.

Section: Slope Mass Ratingmentioning

confidence: 99%

Section: Slope Mass Ratingmentioning

confidence: 99%

Rock mass assessment along the right bank of river Sutlej, Luhri, Himachal Pradesh, India

Kainthola

Geomatics, Natural Hazards and Risk

2013

American Journal of Environmental Sciences

“…The r.SMR module is based on the geomechanical classification and uses the continuous equations introduced by (Tomás Jover et al, 2007). The input data are: DEM, dip and dip direction of discontinuity, the F4 index (Romana, 1993) and the RMRb index (Bieniawski, 1989).…”

Section: Rock Mass Characterizationmentioning

confidence: 99%

Rock Slopes Failure Susceptibility Analysis: From Remote Sensing Measurements to Geographic Information System Raster Modules

Andrea¹

2010

Problem statement: Two important step can be recognised in the rockfall analysis: the potential failure detection and the run out simulation. Analyzing the stability of rock slopes, most important kinematisms are planar or wedge slidings and topplings. The aim of this study was to coupling a deterministic approach for landslide initiation (potential rockfall source areas) with a runout analysis by developing new GRASS GIS raster modules. A case study in the Ossola Valley, at the border between Italy and Swiss, was discussed. Approach: New GIS raster modules for rockfall analysis were developed. Slope stability modules were based on rock mass classification indexes and on limit equilibrium model, while the prediction of rockfall travel distance was based on the shadow angle approach. Results: The study highlighted the importance of GIS tools for analysis of landslide susceptibility. The spatial forecasts provided by the new GIS modules were validated and supplemented by traditional analysis. Conclusion: This study proved that there is a good correspondence between the prediction of high attitude to instability calculated by the modules and the location of past events. The new modules have provided an opportunity to assess, in an objective and repeatable way, the susceptibility to failure and also quantitative information about area of invasion for rock falling.

“…Along with tunnel support, these systems are also used to calculate the rock masses' geomechanical properties, the stand-up time for the tunnel and support load. Although these systems were developed, refined and updated for tunnel support design, these classification systems also have applications in various engineering projects like mining [26][27][28][29][30][31][32], slopes [10,[33][34][35][36][37], dam foundations [38] and TBM (Tunnel Boring Machine) tunnels [17,19,39].…”

Section: Introductionmentioning

confidence: 99%

Review of Rock-Mass Rating and Tunneling Quality Index Systems for Tunnel Design: Development, Refinement, Application and Limitation

et al. 2018

Although rock-mass rating (RMR) and tunneling quality index (Q) systems are used in different rock engineering projects as empirical design tools, their application in tunnel design is widely accepted as these systems were developed and updated for this purpose specifically. This paper reviews the work conducted by various researchers since the development of these two systems with respect to tunneling only. Compared to other empirical classification systems, these systems received international acceptance and are still used as empirical design tools in tunneling due to their continuous updates in the form of characterization and support. As the primary output of these systems is the initial support design for tunnel, however, their use in the calculation for rock-mass properties is an essential contribution of these systems in rock engineering design. Essential for the tunnel design, these rock-mass properties include the modulus of deformation, strength, Poisson's ratio, Mohr-Coulomb parameters and Hoek-Brown constants. Other application for tunneling include the stand-up time and rock load. The uses and limitations of these systems as empirical tunnel design tools are also included in this review article for better results. Research to date indicates that if the ground behavior is also taken into account, the application of these empirical systems will be more beneficial to the preliminary design of tunnels.