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首页> 外文期刊>Advances in civil engineering >Case Study on Safety Assessment of Rockfall and Splash Stone Protective Structures for Secondary Excavation of Highway Slope
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Case Study on Safety Assessment of Rockfall and Splash Stone Protective Structures for Secondary Excavation of Highway Slope

机译：高速公路斜坡二次挖掘岩土岩石防护结构安全评估案例研究

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Rockfall occurs on the excavation of the slope of highway resulting from excavated rock pieces. In order to solve the problem of rockfall protection during the disturbance of high slope secondary excavation, rockfall analysis program RocFall was used to perform inverse calculation for rockfall path of excavation disturbed rock. Based on a case study of a reconstruction and expansion project, two rockfall movement models were proposed under excavation disturbance. Moreover, the safety of protective structures under five protection schemes and different initial rockfall movement points is evaluated according to the rockfall interceptions rate. The evaluation results were further verified by long-term field observation. The results show that the protective structure at the slope top has a better interception effect to rockfall. It was difficult to intercept the splash stone, which threats to the traffic safety of the existing roads. According to different construction points of mechanical excavation and the interception rate of splash stone by the protective structure, the forbidden region and safety region of mechanical excavation were proposed.
机译：岩石发生在挖掘岩石件引起的高速公路斜坡的挖掘上。为了解决高坡度近挖掘扰动期间岩土保护问题，岩石分析计划罗木用于对挖掘岩石岩石路径进行逆计算。基于重建和扩建项目的案例研究，在开挖干扰下提出了两个岩石运动模型。此外，根据岩石拦截率评估了五种保护方案和不同初始岩石运动点的保护结构的安全性。通过长期场景观察进一步验证了评价结果。结果表明，坡度顶部的保护结构具有更好的拦截效果对岩石。很难拦截溅石，这威胁到现有道路的交通安全。根据机械挖掘的不同施工点和采用保护结构的飞溅石的拦截率，提出了禁区和机械开挖安全区域。

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