摘要
在隧道埋深较大时,地震系数法由于夸大了隧道上覆土柱地震惯性力的影响,与实际工程和震害现象严重不符。因此,要提高现有地震系数法的适应性,迫切需要对地震系数法进行修正。首先依据地震系数法进行抗震计算,分析其局限性;并在Ⅴ级围岩条件下,分别采用地震系数法﹑反应位移法和时程分析法,对不同跨度的洞室进行抗震计算,最终得出Ⅴ级围岩条件、不同跨度下地震系数法的上覆土柱合理计算高度,研究成果可供隧道工程抗震计算参考。
The earthquake coefficient method is used for aseismatic calculation of tunnel in traffic tunnel specification in our country,but the method is not in accordance with the practical engineering and seismic damage when tunnel is buried very deep,because the inertia force of overlaying soil is overestimated.In order to improve the adaptability of earthquake coefficient method,it is necessary to modify it.In this paper,the aseismatic calculation based on earthquake coefficient method is carried out,and the limitation of the method is analyzed.Then earthquake coefficient method,response displacement method,and dynamic analysis method are applied to tunnels’ aseismatic calculation in V class surrounding rock at different widths of the cavity.Finally,the advisable calculation heights of tunnel overlaying soil with earthquake coefficient method in V class surrounding rock is presented,which can be referenced in aseismatic calculation of tunnel engineering.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第4期159-164,共6页
Journal of Chongqing University
基金
国家973计划资助项目(2010CB732105
2011CB013605)
国家杰出青年基金资助项目(50925830)
高铁联合基金重点项目(U1134208)
关键词
抗震设计
深埋
隧道跨度
Ⅴ级围岩
上覆土柱计算高度
seismic design
buried depth
tunnel width
V class surrounding rock
calculation height of overlaying soil
