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大量的工程现场监测结果已表明,因温度上升致使基坑支撑体系产生的温度应力以及因温度下降而导致的围护结构变形均已不容忽视。通过三维数值分析方法,以及采用修正剑桥弹塑性模型,将温度场作用于环梁支撑体系,着重分析对比直接升温和降温再升温对环梁支撑结构内力的影响,以及分析降温过程中环梁支撑结构的变形对基坑变形的影响,以引起相关实际工程设计和施工的注意。
A large number of on-site monitoring results have shown that the temperature stress caused by the temperature rise of the supporting system of foundation pit and the deformation of the retaining structure caused by the temperature drop have not been neglected. Through the three-dimensional numerical analysis method and the modified Cambridge elastic-plastic model, the temperature field is applied to the ring-beam supporting system. The influence of the direct heating and cooling and rewarming on the internal force of the ring-beam supporting structure is analyzed and analyzed. Of the deformation of the impact of deformation of the pit to cause the relevant actual engineering design and construction of the attention.