软弱围岩隧道抗震设防措施  

Aseismic Fortification Measures for Tunnels in Soft Surrounding Rock

作　　者：陈七林 

机构地区：[1]福州市规划设计研究院,福州350003

出　　处：《现代隧道技术》2011年第6期1-5,共5页Modern Tunnelling Technology

摘　　要：隧道的抗震设防一直只注重结构的强度,而忽视了结构的变形能力和软弱围岩的抗震能力。对软弱围岩隧道震害机理和抗震设防措施的分析表明:锚杆(锚管)和围岩注浆加固措施能提高软弱围岩的抗震性;合理的结构刚度、高性能的建筑材料和高阻尼结构能改善衬砌结构适应地震位移的能力;减震层、抗震缝和预留错台能减轻震害影响。It is always the case that seismic fortification of tunnel designs emphasizes the structural strength and ignores the structural deformation ability and aseismatic capacity of soft rock masses. This analysis of the mechanism of earthquake damage to tunnels in soft surrounding rock and aseismic fortification measures show that： reinforcement by anchor bolts （anchor-tubes） and rock mass grouting can improve the aseismic capability of the soft rock mass; reasonable structural rigidity, high-performance materials and high-damping structures can improve the ability of the lining structure to adapt to the displacement caused by earthquakes; and the seismic-reducing layer, aseismatic joint and reserved stagger-step can reduce the impact of earthquake damage.

关 键 词：软弱围岩 隧道 震害机理 抗震措施 减震措施 

分 类 号：U452.28[建筑科学—桥梁与隧道工程]