防灾减灾工程学报2024，Vol.44Issue(2)：459-466,477,9.DOI:10.13409/j.cnki.jdpme.20221112004
盾构隧道施工对邻近建筑物差异沉降与扭曲变形影响分析
Impact of Shield Tunnel Construction on Differential Settlement and Twist Deformation of Adjacent Buildings
摘要
Abstract
This study investigated the response of existing buildings to the side-crossing of shield tunnel construction.It focused on shallow foundation buildings intersected by the shield tunnel along the north-ern extension of Nanjing Metro Line 1.Field data on building settlements were analyzed,and a numeri-cal model was established using PLAXIS 3D software.The study examined how different horizontal distances between the tunnel and the building,as well as various crossing angles,affected the charac-teristics of differential settlement and twist deformation.The results showed that as the shield's excava-tion surface approached the building,the differential settlement and twist deformation of the building gradually increased.The differential settlement reached its maximum when the shield machine directly passed underneath,after which it stabilized.The peak twist deformation occurred when the excavation surface reached the midpoint section of the building,and gradually decreased thereafter.When the ratio of the horizontal distance between the building's center and the tunnel's axis to the tunnel's outer diame-ter ranged from 0.5 to 2(L/D=0.5～2),the differential settlement of the building was larger,and reached its peak when L/D ratio was 1.5.As the shield crossing angle increased from 0° to 90°,the maximum differential settlement of the building increased accordingly.In contrast,the final twist defor-mation increased first and then decreased,reaching its peak at 45° crossing angle.The research results provide references for similar projects involving shield tunneling passing through shallow foundation buildings.关键词
盾构隧道/浅基础建筑物/差异沉降/扭曲变形Key words
shield tunnel/shallow foundation building/differential settlement/twist deformation分类
建筑与水利引用本文复制引用
孙帅,常连翠,张煌,丁建文,刘晋余..盾构隧道施工对邻近建筑物差异沉降与扭曲变形影响分析[J].防灾减灾工程学报,2024,44(2):459-466,477,9.基金项目
国家自然科学基金(51978159)资助 （51978159）
