【摘要】 目前隧道的减震措施主要有两种,即设置减震层和抗震缝。本文以黄草坪隧道为研究对象,应用有限差分程序FLAC3D对其进行地震响应的数值模拟研究,分别从围岩和衬砌的应力、加速度及位移方面探讨了这两种减震措施的效果,同时对比不同抗震缝间距时围岩和初期衬砌的纵向应力。研究结果表明,减震层和抗震缝的减震作用比较明显,应根据工程抗震的要求选择不同的减震措施。更多还原

【Abstract】 At present,there are two shock absorption measures of tunnel,namely shock absorption layer and aseismatic joint.Based on Huangcaoping tunnel,this paper simulates the shock absorption measures of this tunnel by using FLAC^3D,and discusses on the effects of the two shock absorption measures from the aspects of the stress,acceleration and displacement of surrounding rock and liner,at the same time,this paper compared the longitudinal stress of surrounding rock and early lining with different distance of aseismatic joint.The results indicate that the effects of shock absorption layer and aseismatic joint are both obvious,and we need choose different measures of shock absorption according to the aseismatic request of project.更多还原