论文部分内容阅读
针对软土地区实际工程设计,采用整体有限元方法,研究了大断面开挖地下通道结构基坑对既有近距离盾构隧道的影响问题。考虑了设置分隔墙、抗拔桩长度、封堵墙深度对基坑开挖产生的隧道最大隆起的影响,并根据现场实际情况和结构特点,分析了对应的施工控制措施。从实际工程设计的角度提出了针对大面积基坑开挖对下卧盾构隧道影响问题的分析研究方法和一系列保护地铁的措施,以期对相关工程问题有一定借鉴意义。
According to the actual engineering design in soft soil area, the whole finite element method is used to study the influence of foundation pit with large-section excavation subsurface structure on the existing near shield tunnel. The influence of setting partition walls, length of anti-pull piles and the depth of sealing wall on the maximum bulge of the tunnel caused by excavation is considered. Corresponding construction control measures are analyzed according to the actual situation and structural characteristics of the site. From the point of view of actual engineering design, this paper puts forward a series of measures to protect metro from the impact of large area excavation on the shield tunnel under shield tunneling, in the hope of referring to some engineering problems.