CUI Zhiqiang, SUN Yali. 2020: RISK ASSESSMENT AND DECISION OF ROCKFALL IN SCENIC SPOT BASED ON RHRS SYSTEM. JOURNAL OF ENGINEERING GEOLOGY, 28(4): 822-831. DOI: 10.13544/j.cnki.jeg.2019-251
    Citation: CUI Zhiqiang, SUN Yali. 2020: RISK ASSESSMENT AND DECISION OF ROCKFALL IN SCENIC SPOT BASED ON RHRS SYSTEM. JOURNAL OF ENGINEERING GEOLOGY, 28(4): 822-831. DOI: 10.13544/j.cnki.jeg.2019-251

    RISK ASSESSMENT AND DECISION OF ROCKFALL IN SCENIC SPOT BASED ON RHRS SYSTEM

    • Rock fall frequently happens in natural landscape scenic spot and imperils tourists. So it is of social and scientific significance to study the rock fall and collapse. RHRS risk evaluation system is used to analyze the various factors that can cause the rockfalls in scenic spots. They include slope height, geological characteristics, rockfall volume/block size, annual average rainfall, and historical rockfall frequency. In order to represent the extent of rockfall risk, the scores for rockfall risk are calculated with the original scoring formula to be 142 and 117.2 for the King of Medicine Mountain and Jianglang Mountain in Quzhou province, respectively. In this process, the abstract qualitative evaluation is converted into a specific quantitative evaluation. The FN curves and ALARP principle are combined to determine the allowable risk criteria, as well as clearly divide the high, medium and low risk areas. The average acceptable risk calculated is 1.62×10-5 per year. The upper and lower limits of the acceptable risk level on the FN curves are calculated as 10×10-4 per year and 10×10-5 per year respectively. The findings of this study can be used as a significant reference for rockfall risk evaluation and decision making in scenic spots.
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