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首页> 外文期刊>Natural hazards and earth system sciences >Comparison between qualitative rockfall risk rating systems for a road affected by high traffic intensity
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Comparison between qualitative rockfall risk rating systems for a road affected by high traffic intensity

机译：高交通强度影响道路的定性落石风险评估系统比较

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The paper deals with the assessment of the rockfall risk for a road stretch, in southern Italy, affected by high traffic intensity. Three qualitative rockfall risk rating systems (QRSs) which use an exponential scoring with a base of 3 were employed, and then the results were compared. The used methods are the following: the Rockfall Hazard Rating System, a modified version of this method already proposed in the past by one of the authors, and the modified version of the Colorado Rockfall Hazard Rating System. The studied road stretch is about 11 km in length and is part of a very tortuous road flanked by rock slopes characterised by complex geostructural and geomechanical layouts. The road was subdivided into 56 sections, defined so as to have – as much as possible – homogeneous geological characteristics. By means of the three QRSs, it was possible to ascertain that high levels of rockfall risks are due to the lack of ditches, a very limited percentage of decision sight distance (PDSD) values and a small roadway width, whereas a subordinate factor is the hazard caused by rockfalls. Several positive and negative aspects arising from the use of the employed methods are highlighted and discussed.
机译：本文涉及对意大利南部受高交通强度影响的一段道路的落石风险的评估。使用三个以3为底的指数评分的定性落石风险评估系统（QRS），然后比较结果。所使用的方法如下：Rockfall危险等级系统，是一位作者过去已经提出的该方法的修改版本，以及Colorado Rockfall危险等级系统的修改版本。所研究的道路长度约11公里，是一条曲折的道路的一部分，道路两侧是岩石斜坡，这些斜坡具有复杂的地质结构和岩土力学布局。道路被细分为56个部分，这些部分的定义应尽可能具有均一的地质特征。通过三个QRS，可以确定高落石风险是由于缺乏沟渠，决策视距（PDSD）值的百分比非常有限以及巷道宽度较小，而从属因素是落石造成的危险。突出并讨论了因使用所采用的方法而产生的一些积极和消极的方面。

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