以合肥市轨道交通1号线试验段为研究对象,通过对其深基坑支护结构的顶端水平位移、顶端沉降、深层水平位移的监测,探讨了水平位移、沉降的变化规律与变形特性。结果表明:基坑的顶端水平位移随开挖时间的渐变过程近似成分段抛物线型;顶端沉降随开挖时间的递增而增大,增长速度前慢后快;深层水平位移大小及分布与基坑开挖深度、支护结构等因素有关。由监测结果可知,该基坑工程支护结构的变形控制设计方案合理,效果良好,满足了设计和环境的要求。 Taking the test section of Hefei Metro Line 1 as the research object, the horizontal displacement and settlement settlement and deformation characteristics are discussed by monitoring the top horizontal displacement, the top settlement and the deep horizontal displacement of the supporting structure of deep foundation pit. The results show that the horizontal displacement at the top of the pit is approximately parabolic with the gradual change of the excavation time. The settlement of the top increases with the increase of the excavation time, Excavation depth, support structure and other factors. It can be seen from the monitoring results that the deformation control design scheme of the foundation pit engineering support structure is reasonable and the effect is good, which meets the requirements of design and environment.