Robust geotechnical design of rock bolts for stability of rock slopes using response surface
Pandit Bhardwaj, Raju G Doraiswamy, Babu GL Sivakumar
Available Online November 2016.
- https://doi.org/10.2991/rare-16.2016.35How to use a DOI?
- Response Surface; Reliability Index, Design Robustness; Pareto Front
- Stability of rock slopes in many civil engineering projects involves installation of rock bolts for stabilization. Uncertainty in input parameters that determine the stability of rock slopes may lead to uncertainty in evaluating the factor of safety. Design of installed rock bolts must be optimized for safety requirements, cost efficiency and robustness. A design is considered robust if it is least sensitive to variation in input parameters. A well accepted quantity, Signal-to-Noise Ratio (SNR) is selected to be a robustness measure. Factor of safety of slope is evaluated using commercial software Phase2D. General purpose response surface as a surrogate model to Phase 2D simulation is created to model the system response for various designs. Reliability index for all the designs was calculated from the response surface via Monte Carlo simulations. Further analysis was performed on those designs which satisfy a threshold value of reliability index. A simplified Robust Geotechnical Design (RGD) methodology is adopted in which a number of single objective optimizations were performed to locate the position of acceptable design w.r.t. utopia point in a plot of cost vs. robustness. Finally the global knee point is taken to be the optimum design whose distance is minimum from the utopia point
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Pandit Bhardwaj AU - Raju G Doraiswamy AU - Babu GL Sivakumar PY - 2016/11 DA - 2016/11 TI - Robust geotechnical design of rock bolts for stability of rock slopes using response surface BT - Recent Advances in Rock Engineering (RARE 2016) PB - Atlantis Press SP - 217 EP - 222 SN - 2352-5401 UR - https://doi.org/10.2991/rare-16.2016.35 DO - https://doi.org/10.2991/rare-16.2016.35 ID - Bhardwaj2016/11 ER -