沈丹客运专线本溪隧道出口落石影响范围研究

为对铁路隧道出口落石分布范围的分析提供理论依据,提出了一种二维斜坡落石崩滑运动模型,该模型基于铁路行业所推荐的落石法向与切向恢复系数,建立了落石在同一直线坡段与不同直线坡段连续碰撞的时间与速度计算方法。通过对沈阳至丹东客运专线本溪隧道出口附近危岩体的调查,运用所建立的计算模型对落石的潜在影响范围进行了分析,绘制了落石的平面影响区域,为隧道洞口与相邻桥梁的设计提供了依据。

Study on falling-stone's impact limit at outlet section of Benxi tunnel on Shenyang-Dandong passenger-dedicated railway

In order to provide the theoretical basis for rockfall distribution range analysis of the railway tunnel entrance,this paper established a two-dimensional slope rockfall collapse-slide motion model which is based on the rockfall normal and tangential restitution coefficient recommended by railway field,and presented the time and speed calculation method for rockfall continuous collision in the same or different linear slope sections.Through the survey of dangerous rock near the Benxi tunnel exit in Shenyang to Dandong railway passenger dedicated line,this paper analyzed the rockfall potential influence scope according to the above model and drew the rockfall planar impact area,which can provide a basis for the Benxi tunnel and the adjacent bridge design.