摘要
引入等效内摩擦角的概念,将隧道周围土体等代为无黏性均质体,运用Terzarghi松散体理论,对隧道在地面非对称填载作用下的土拱效应进行了分析,并给出了能够产生土拱效应的界限埋深公式。分析结果表明,地面非对称填载的大小和分布均会对既有明挖隧道的土拱效应产生影响。
Through introducing the concept of equivalent internal friction angle and taking surrounding soil of tunnel as cohesionless homogenate mass,the soil arch effect of existing open cut tunnels under ground asymmetric fill load was discussed by using Terzarghi unconsolidated mass theory and the critical embedded depth formula of soil arch effect was concluded.The results showed that both the size and distribution of the ground asymmetric fill load has influence on soil arch effect of existing open cut tunnel.
出处
《铁道建筑》
北大核心
2015年第7期31-34,共4页
Railway Engineering
基金
国家自然科学基金青年项目(51304088)
关键词
既有明挖隧道
地面非对称填载
土拱效应
等效内摩擦角
Existing open cut tunnel
Ground asymmetric fill load
Soil arch effect
Equivalent internal friction angle
