摘要
大拱隧道受结构和跨度的影响,其初期支护与二次衬砌各自承受不同的围岩压力。给出了大拱隧道的荷载计算方法,并以某高速公路隧道为例,按荷载结构法分析计算了衬砌内力。计算分析表明,初次衬砌所受荷载比二次衬砌大得多,所以初次衬砌是主要承载结构。分析方法对类似隧道衬砌设计具有参考意义。
The primary support and the second lining of large-spanned tunnel have endured different surrounding rock stress because of the influence of structure and span of tunnel. The calculation method of loading on lining is suggested in the paper. According to the condition of engineering geology of a large-spanned tunnel, the internal force of lining is calculated. The resuits show that the primary support is the dominating structure for support the loading. The analysis method of this paper, is useful for the lining design of analogous tunnel.
出处
《土工基础》
2007年第6期64-66,共3页
Soil Engineering and Foundation
关键词
大拱隧道
衬砌
荷载-结构法
内力分析
large-spanned tunnel, lining, loading-structure method, internal force analysis
