上跨运营地铁隧道的明挖基坑结构变形控制措施分析

Analysis on Structural Deformation Control Measures of Open Excavation Foundation Pit above Crossing Metro Tunnels

介绍了苏州市星港街隧道上跨运营地铁1号线隧道施工概况,从围护结构、加固以及开挖和回筑3个施工阶段采取了控制措施,如利用试验段优化三轴搅拌桩参数、合理基坑划分、限时回筑等,结合全过程监测,提出了有效控制基坑结构变形的综合措施。

The construction of Xinggang Street tunnel through the Metro line 1.In Suzhou city is introduced.Control measures have been taken from three construction stages of enclosure structure,reinforcement,excavation and back filling.Using the parameters of the three-axis mixing pile,the reasonable foundation pit division,combined with the whole process monitoring,the comprehensive measures to effectively control the structural deformation of the foundation pit are proposed in this paper.