摘要
北京某地铁区间盾构隧道下穿既有河道,运用FLAC3D有限元分析软件,对盾构下穿施工进行了三维数值模拟分析,并结合实际穿越条件,采用调整注浆压力控制了地表沉降。监测结果表明,地表沉降和管片变形均小于允许值,保证了下穿施工的安全。
Based on a shield tunnel of Beijing subway crossed an existing river,the shield tunneling is simulated and analyzed by Flac-3 d finite element analysis software.Combined with actual conditions,surface settlement is controlled by adjusting the grouting pressure.The result shows that both the surface settlement and segment defor-mation are less than the allowable value and ensure the safety of undercrossing construction.
作者
王志芬
Wang Zhifen(Beijing Municipal Construction Group Co.,Ltd.,Beijing 100049,China)
出处
《市政技术》
2021年第2期93-97,共5页
Journal of Municipal Technology
关键词
盾构隧道
下穿既有河道
数值模拟
变形分析
shield tunnel
under-cross the existing river channel
numerical simulation
deformation analysis
