带坑中坑基坑耦合应力、应变场解析解 的分析与推导
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（十九冶成都建设有限公司, 成都 610091）[摘要] 目前对坑中坑基坑的理论研究尚少。先对带坑中坑基坑可能存在的分布形式进行了分析总结，并以此为依据提出了一种带坑中坑基坑的统一理论分析模型；再结合基坑深度、平面尺寸等影响因素，定性分析了内、外坑处于不同位置时带坑中坑的耦合变形规律；最后将内坑土体视作反向荷载，建立了一种新的分析带坑中坑基坑的力学分析模型，并推导出了带坑中坑基坑应力场和位移场解析解。[关键词] 基坑;坑中坑;应力;应力场;应变场;解析解中图分类号：TU470+.3 文献标识码：A 文章编号：1002-848X(2013)S2-0132-04作者简介：宋明健，博士，高级工程，主要从事基坑工程及岩土信息技术方面的工作和研究，E-mail：songjianyi@sina.com。Analysis and deduction of coupled strain-stress fields in pit-in-pit excavationSong Mingjian, Zhao Shande(China 19th Metallurgical Corporation, Chengdu 610091, China)Abstract: At present the theory study of pit-in-pit excavation is less . Firstly, all possible distributions with pit-in-pit excavation are analyzed and summarized. On the basis, one unified theory analysis model on pit-in-pit is proposed. Next, the influence factors are analyzed, such as combination of foundation pit depth, plane size, the qualitative analysis of the internal and external hole in a different position when coupled with pit-in-pit deformation law. Finally, the out pit in the soil as a reverse load, the new mechanics analysis model of belt of the pit-in-pit excavation is established, and the stress field and displacement field analytical solution on the pit-in-pit excavation is deduced.Keywords: foundation pit; pit-in-pit foundation; stress field; strain field; couple
