南湖北路地铁车站深基坑围护桩变形规律数值计算与实测分析

Numerical Calculation and Analysis of Deformation Law of Retaining Piles for Deep Foundation pit of South North Railway Station

深基坑围护结构的变形对施工的安全稳定至关重要。以乌鲁木齐市南湖北路地铁站深基坑工程为对象,基于有限元ANSYS"生死"单元的定义,对深基坑开挖、支护的施工过程进行模拟计算,并通过对现场施工过程围护结构桩体的位移进行监测,对比分析桩体结构变形的监测和模拟计算结果。由此可知,监测值明显大于数值计算值,但两者总体变化趋势一致,且均小于安全警戒值,证明了该深基坑支护采用的围护结构安全合理。同时可为同类地铁深基坑工程支护设计提供参考依据。

The deformation of retaining structure of deep foundation pit is very important to the safety and stability of construction. Urumqi City Road subway station deep foundation pit project as the object, the finite element ANSYS ＂based on the definition of death element＂, for deep foundation pit excavation and supporting construction process is simulated and monitored by displacement of the process of field construction of retaining structure of pile, the ratio of monitoring and analysis of deformation of pile structure simulation results ： the monitoring value is significantly greater than the numerical value, but the overall trend is consistent, and less than the safety warning value, proved that the deep foundation pit of the retaining structure is reasonable.At the same time, it provides the reference for the design of deep foundation pit support of the same kind of subway.