青岛地铁车站深基坑变形规律分析

为了研究青岛地区土岩复合地层地铁车站深基坑围护结构变形规律，以庙头站基坑为工程背景，根据现场监测数据，分析了从基坑开挖到底板浇筑完成及拆除底板以上钢支撑时的桩体变形特性。结果表明:钻孔灌注桩+内支撑的支护方式能够有效地控制基坑变形，第三道钢支撑的及时架设，对围护结构深层水平位移最大值的位置与大小都有重要影响。

Analysis on Deformation Law of Deep Foundation Pit of Subway Station in Qingdao

In order to study the deformation law of enclosure structure of deep foundation pit in subway station in soil-rock compound stratum in Qingdao area, based on the foundation pit of Miaotou station of subway engineering, according to the site monitoring data, the deformation characteristics of pile body from excavation to bottom plate pouring and removing the steel support above the bottom plate are analyzed. The results show that the support mode of bored cast-in-place pile+inner support can effectively control the deformation of foundation pit. The erection of the third steel support has important influence on the location and size of maximum deep horizontal displacement of enclosure structure.