大直径“F”型顶管接口变形安全限值研究  

Study on Deformation Safety Limit of Large-Diameter F-shaped Pipe-Jacking Joint

作　　者：叶冠林[1] 卞荣 张琪 潘上 林天翔 YE Guanlin;BIAN Rong;ZHANG Qi;PAN Shang;LIN Tianxiang(School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;State Grid Zhejiang Electric Power Company Economic and Technological Research Institute,Hangzhou 310012,Zhejiang,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]国网浙江省电力有限公司经济技术研究院,浙江杭州310012

出　　处：《隧道建设（中英文）》2021年第3期356-363,共8页Tunnel Construction

基　　金：国家电网公司科技项目(521104180020);国家自然科学基金项目(42072317)。

摘　　要：为确定既有顶管隧道受到邻近施工的扰动后管节接口的变形安全限值,以顶管工程施工中最常用的大直径“F”型承插式顶管隧道为研究对象,根据多个工程案例,提出顶管接口止水失效类型,建立相应的管节接口张角与细部尺寸的几何关系式,结合现有规范确定位移控制指标;对典型顶管隧道工程实例进行计算,得到顶管接口止水失效所对应的允许张角和相对位移(管节两端相对竖向位移),进而获得使用阶段的大直径“F”型承插式顶管隧道变形安全限值。研究结果表明:随着管径增大,顶管隧道接口允许张角整体呈减小趋势,最小值为0.84°;相同管长下的相对位移减小趋势不明显,最小值为15 mm。To determine the deformation safety limit of pipe joint of existing pipe-jacking tunnel disturbed by adjacent construction,the most commonly-used large-diameter F-shaped pipe-jacking tunnel in pipe-jacking construction is analyzed.Based on several engineering cases,the failure types of water stop of pipe-jacking joint are presented,the geometric relation between the opening angle of the pipe-jacking joint and the detailed size is investigated,and the displacement control index is determined according to the existing specifications.The allowable tension angle and relative displacement(vertical displacement at both ends of pipe joints)corresponding to the water-stop failure of pipejacking joint are obtained by engineering calculations of typical pipe-jacking tunnel,then the deformation safety limit of large-diameter F-shaped pipe-jacking tunnel at service stage is obtained.The following are the results:(1)The allowable opening angle of the pipe-jacking tunnel joint decreases with an increase in pipe diameter,and the minimum value is 0.84°and(2)The relative displacement has no obvious decreasing trend at a fixed pipe length,and the minimum value is 15 mm.

关 键 词：承插式顶管 大直径顶管隧道 止水失效 位移模式 变形限值 

分 类 号：U45[建筑科学—桥梁与隧道工程]