摘要
随着我国越来越多的隧道投入到运营中,病害隧道的出现也越来越引起人们的关注。选取对隧道稳定性影响较大的病害之一-空洞作为分析对象,通过对某病害隧道典型断面进行数值分析,对隧道衬砌背后不同部位以及不同范围的空洞模拟,得出其拱部内力并计算得到相应部位的安全系数。通过分析了解到,隧道衬砌背后不同部位出现空洞,均对衬砌的安全系数有影响;当空洞较小时(小于0.5m)对其影响不大,随着空洞直径的增大,对其安全系数的影响也随之增大。
With more and more tunnels put into operation, tunnel diseases attract people attention. This paper chooses the cavity, which presents greater impact on the stability of the tunnel, as analysis object, through numerical analysis on typical cross-section of certain tunnel, and simulation on cavities behind tunnel lining at different areas and different parts, the internal force of its arch is gained and the safety factor of corresponding parts is calculated. By analyzing it is known that there are holes in different parts behind tunnel lining, all of the safety factor will be affected; the smaller cavity （less than 0.5m） has little influence, with diameter of the cavity increasing, the impact of its safety factor would be even heavier.
出处
《地下空间与工程学报》
CSCD
2008年第6期1101-1104,1137,共5页
Chinese Journal of Underground Space and Engineering
关键词
在役隧道
病害
空洞
安全系数
衬砌
tunnel in active service
disease
cavity
safety factor
lining
