郑万铁路罗家山隧道高陡边仰坡危岩落石综合防护技术

Comprehensive Protection Technology of Dangerous Rock andRockfall on High and Steep Side Slope of Luojiashan Tunnelof Zhengzhou-Wanzhou Railway

郑万铁路罗家山隧道横洞洞口分布大范围的危岩落石,对洞口施工人员及设备安全构成巨大威胁,本文采用Rockfall落石分析软件对坡面落石滚落弹跳高度、运动速度和冲击能量进行模拟分析,结合边仰坡实际情况,提出“落石清除及场地搬迁+混凝土明洞+高强波纹板棚洞+张口式帘式主动防护网+被动防护网”的综合措施,以减轻危岩落石危害,设计方案可为类似工程提供借鉴。

A lot of overhanging rocks and rockfalls are distributed at the adit portals of Luojiashan Tunnel of Zhengzhou-Wanzhou Railway,posing a great threat to the safety of construction personnel and equipment.This paper uses Rockfall analysis software to simulate and analyze the jumping height,moving speed and impact energy of falling rocks on slope,and puts forward"clearing falling rocks and site relocation+concrete open-cut tunnel+high-strength corrugated board shed tunnel+open-mouth curtain active protective net+passive protective net"to reduce dangerous rockfalls.This design can provide a reference for similar tunnels in the future.