越江盾构隧道纵向受力及变形分析研究  

Study on the Longitudinal Force and Deformation of River-crossing Shield Tunnel

作　　者：赵强政[1] 李树鹏[1] 陈昌武 李辉 覃盛科 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]襄樊市交通规划设计院,襄樊441000

出　　处：《交通科技》2009年第2期29-32,共4页Transportation Science & Technology

摘　　要：以某越江盾构隧道工程为背景,采用三维梁-弹簧模型对水位变化、河床冲刷等不同情况下盾构隧道的纵向受力及纵向变形进行数值模拟,并对数值计算结果进行了分析。分析可知,纵向上的沉降主要发生在地质条件变化处、地形条件突然变化处以及盾构隧道与竖井的连接处。探讨了盾构隧道与竖井的不同连接方式对于隧道纵向内力及变形的影响,并进行了对比分析,根据分析结果提出采用柔性连接的建议。Based on a river-crossing shield tunnel, the longitudinal force and longitudinal deformation of shield tunnel under various condition, including different water level, riverbed erosion etc, is studied by using numerical simulation with 3-Dimension Beam-Spring model. Through analyzing the resuit, the longitudinal deformation of shield tunnel always occurred in the area where the geological conditions or terrain conditions suddenly changed, and at the position where the shield tunnel and vertical shaft connected. And then the paper studied the effect of different connection between tunnel and vertical shaft and put forward the proposal of adopting flexible connection. Meanwhile, it can provide important reference to the correlative project.

关 键 词：盾构隧道 纵向变形 梁-弹簧模型 管片结构 

分 类 号：U455.43[建筑科学—桥梁与隧道工程] TV698.11[交通运输工程—道路与铁道工程]