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针对监测超高层建筑沉降指导建筑施工的问题,从荷载、沉降和时间3者之间关系曲线出发,分析了某超高层建筑施工过程中4年的沉降监测数据,得到了该超高层建筑的沉降特征,并对转化层沉降在施工过程中沉降贡献率和滞后的剩余沉降进行了分析。结果表明:超高层建筑沉降的增加与时间、荷载呈非线性关系;沉降曲线可分为“凸”“凹”“直线”3个阶段;转换层沉降是沉降曲线由“凸”型转变为“凹”型的部分,要减慢转换层施工速度,让前期滞后荷载量的沉降得到释放;主体封顶后的滞后剩余沉降值和沉降稳定时间历程是评价建筑沉降稳定和安全性的主要因素。提出了沉降曲线的3个阶段,获得了各阶段沉降特征,构造了沉降曲线函数,为超高层建筑的安全施工提供了参考。
In order to monitor the construction of super high-rise buildings and guide the construction of buildings, from the relationship curve between load, settlement and time, a four-year monitoring data of the construction of a super high-rise building was analyzed, and the settlement of the super high-rise building was obtained. Characteristics, and analysis of the settlement of the conversion layer settlement in the construction process and the lagging residual settlement. The results show that the increase of subsidence of super high-rise building has a nonlinear relationship with time and load; the settlement curve can be divided into three stages: “convex”, “concave”, and “straight line”; the conversion layer settlement is a settling curve. The “convex” type is transformed into the “concave” type, and the construction speed of the conversion layer must be slowed down so that the settlement of the early lagging load can be released; the lagging residual settlement value after the capping of the main body and the settling time course of the settlement are the evaluation of the construction. The main factors of settlement stability and safety. The three phases of the settlement curve are proposed, the characteristics of the settlement in each phase are obtained, and the function of the settlement curve is constructed, which provides a reference for the safe construction of super high-rise buildings.