湖南大学学报（自然科学版）Issue(1)：103-109,7.
上硬下软地层盾构隧道开挖面极限支护力分析
Analysis of Limit Supporting Force of Tunnel Excavation Face for Shield Machine in Upper-hard Lower-Soft Ground
摘要
Abstract
Limit support pressure is a key parameter to keep the stability of the excavation face in shield tunnel excavation,but there has been little research on the limit supporting force of tunnel excavation face for shield machine in upper-hard lower-soft ground.Based on the limit equilibrium method,silo theory and hypothesis of sliding surface being a broken line,the limit supporting force calculation model and formula of excavation face for shield tunnel in up-per-hard lower-soft ground were established.To check the rationality of the model and the necessity of considering layers,comparative numerical analyses were conducted.The agreement between the two methods is very good.The effect of buried depth,thickness of upper and lower soil layer,cohesion and internal friction angle on limit support force was analyzed.It shows that the results are different when considering layered or not when the layer is uneven. Therefore,it cannot be equated with homogeneous soil,which should be considered in engineering practice.关键词
盾构隧道/上硬下软地层/极限支护力/筒仓理论/极限平衡/数值模拟Key words
shield tunnel/upper-hard lower-soft ground/limit support force/silo theory/the limit e-quilibrium/numerical simulation分类
建筑与水利引用本文复制引用
赵明华,毛韬,牛浩懿,刘猛..上硬下软地层盾构隧道开挖面极限支护力分析[J].湖南大学学报（自然科学版）,2016,(1):103-109,7.基金项目
国家自然科学基金资助项目（51278187），National Natural Science Foundation of China （51278187）；长沙市科技项目 （）
