软土地区超大直径盾构穿越运营地铁桥梁数值分析  

Numerical Analysis of Super-large Diameter Shield Tunnelling through Subway Bridge in Soft Soil Area

作　　者：刘念 LIU Nian(Shanghai Municipal Engineering Design Institute(Croup)Co.,Ltd.,Shanghai 200092)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《现代隧道技术》2024年第S01期494-500,共7页Modern Tunnelling Technology

基　　金：上海市政总院科技项目(K2020K107A);上海建工科技项目(23JCSF-39)

摘　　要：结合上海市北横通道超大直径盾构隧道(管片外径15.0 m)工程实例,采用MidasGTS有限元分析软件,分析北横通道盾构隧道穿越轨道交通3号线苏州河桥和凯旋路苏州河桥的影响。研究表明,地层损失率控制在0.5%以下,超大直径盾构隧道穿越轨道交通3号线苏州河桥和凯旋路苏州河桥,可保证既有桥梁安全。其中,北横盾构隧道穿越轨道交通3号线苏州河桥后,既有桥梁桥墩最大沉降为3.3 mm,两桥台最大沉降差为1.0 mm;北横盾构隧道穿越凯旋路苏州河桥后,既有桥梁桥墩最大沉降为4.5 mm;两桥台最大沉降差为1.6 mm。Based on Shanghai Beiheng super-large-diameter shield tunnel(outside diameter 15.0 m),the Midas_GTS finite element analysis software was used herein to study the influence of the Beiheng shield tunnel crossing existing the Metro Line 3 Suzhou River Bridge and Kaixuan Road Suzhou River Bridge.The research shows that if the ground loss rate is controlled at 0.5%,the super-large diameter shield tunnel passes through the Metro Line 3 Suzhou River Bridge and Kaixuan Road Suzhou River Bridge is feasible,which of existing structure deformation can meet the requirements of standard.After the Beiheng shield tunnel passes through the Metro Line 3 Suzhou River Bridge,the maximum settlement of the existing bridge piers is 3.3 mm;maximum settlement difference between two abutments is 1.0 mm.After Beiheng shield tunnel passes through Kaixuan Road Suzhou River Bridge,the maximum settlement of existing bridge piers is 4.5 mm;maximum settlement difference between two abutments is 1.6 mm.

关 键 词：盾构隧道 既有桥梁 穿越 沉降 数值分析 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]