摘要
对于双连拱隧道这样的大跨度隧道,中墙的稳定对隧道围岩稳定具有重要的作用,且中墙的厚度是关系安全与经济的重要指标;连拱隧道施工的开挖工序又直接影响着隧道的施工安全、工程费用以及工程进度。文章分析了开挖过程对双连拱隧道安全性的影响,并采用随机可靠性方法对连拱隧道风险进行了研究,进而对中墙厚度进行了优化评价,并结合规范要求得出了最小中墙厚度,其设计满足安全和经济需求。
For large-span tunnels such as double-arch tunnels, the stability of the mid-wall is critical for stabilizing the surrounding rock, and the thickness of the mid-wall is regarded as the key to safe and economical construction. Additionally, construction safety, cost, and progress are directly affected by the construction procedures, in this paper, a random reliability-based analysis is carried out regarding the risks in double-arch tunnels, and the minimum thickness of mid-wall is optimized and compared with the requirements given in the specification.
出处
《现代隧道技术》
EI
北大核心
2013年第6期110-115,123,共7页
Modern Tunnelling Technology
基金
国家自然科学基金项目(41272325)
山东省优秀中青年科学家奖励基金(BS2011NJ012)
关键词
连拱隧道
随机可靠度
中墙厚度优化
相对收敛位移
Double-arch tunnel
Random reliability
Optimization of mid-wall thickness
Relative convergence and displacement
