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为研究施工过程中基坑变形规律和邻近旧厂房柱下独立基础的沉降规律,以及两者之间的关系,依托某轧钢厂房改造加建项目,通过对旧厂房内加建地下室基坑坡顶的水平和竖向位移以及旧厂房的柱下独立基础的竖向位移进行跟踪监测,对监测数据进行分析。监测结果表明:基坑采用的支护形式得当,基坑边坡横向和竖向位移均满足要求,厂房内基坑施工对原有厂房的柱下独立基础沉降的影响得到了有效控制,满足基础竖向位移要求;基坑边缘过长且过于平直不利于基坑边坡稳定,适当增加短边和转折,能够增加边坡横向刚度,并为相邻边提供支点,使边坡水平变形减小,有利于提高边坡横向稳定性;在设计基坑支护时应充分考虑相邻基坑的影响。
In order to study the deformation law of the foundation pit and the settlement rule of the independent foundation under the adjacent old factory buildings in the process of construction and the relationship between the two, rebuild and build projects of a rolling mill plant, Of the horizontal and vertical displacement and the vertical displacement of the independent foundation of the old factory under the column tracking and monitoring of monitoring data analysis. The monitoring results show that the supporting form adopted in foundation pit is proper and the lateral and vertical displacement of foundation pit slope meet the requirements. The influence of the foundation pit construction in the plant on the settlement of the independent foundation under the existing plant is effectively controlled to meet the requirements Vertical displacement of the foundation pit is too long and too straight, which is not conducive to the stability of the foundation pit slope. Appropriate increase of short sides and turning points can increase the lateral rigidity of the slope and provide the fulcrum for the adjacent sides, and reduce the horizontal deformation of the slope Small, is conducive to improving the lateral stability of the slope; in the design of foundation pit support should take full account of the impact of adjacent foundation pit.