铁路深基坑支护设计及监测分析

Supporting Design and Monitoring Analysis of Deep Excavation Excavation of Railway

依据工程特点和沿海软土水文地质条件,本采用钢筋混凝土灌注桩+内支撑的桩撑支护方案,有效地控制了基坑变形,确保了项目顺利实施。在基坑开挖和地下结构施工过程中,对支护结构位移、内撑轴力及周边建筑物沉降进行了监测。选择典型部位桩顶及桩体的水平位移、内支撑轴力的监测结果与设计数值进行对比分析,结果吻合较好。可为沿海软土地区的类似工程设计、施工提供借鉴。

According to engineering characteristics and hydrological geological conditions of coastal soft soil,reinforced concrete pouring pile and interior supporting were combined to form pile-strut supporting scheme in this project. The scheme controls the foundation excavation deformation effectively,then ensures the smooth implementation of the project.During the excavation and underground structure construction stages,the displacement of supporting structure,axial force of internal support and the settlement of the surrounding buildings were monitored. The comparison and analysis of monitoring results with design value are carried out,including the horizontal displacement of the pile head and the pile body,and the internal supporting axial force of the typical parts on supporting structure. It can provide a reference for the follow-up design and construction on coastal soft soil area.