摘要
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。
Based on a lot of on-site monitoring data,the results show that it couldn＇t be ignored which the temperature stress generated in foundation pit support system due to temperature rise and the deformation of foundation pit envelope due to the temperature drop. Using 3D numerical analysis and modified Cambridge elasticplastic model,forcing the temperature load in circle beam supporting structure system of foundation pit,the different affection on circle beam supporting structure under the direct warming up and warming up again after cooling is mainly studied,and the influence of the deformation of circle beam supporting structure to the foundation pit envelope is analyzed in order to attract the attention of relevant practical engineering design and construction.
出处
《建筑科学》
北大核心
2014年第5期26-29,40,共5页
Building Science
关键词
温度应力
环梁支撑
修正剑桥模型
坑外沉降
temperature stress
circle beam supporting
modified Cam-clay model
soil settlement outside pit
