帶坑中坑基坑耦合應(yīng)力、應(yīng)變場解析解 的分析與推導(dǎo)
宋明健,趙善德
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（十九冶成都建設(shè)有限公司, 成都 610091）[摘要] 目前對坑中坑基坑的理論研究尚少。先對帶坑中坑基坑可能存在的分布形式進行了分析總結(jié)，并以此為依據(jù)提出了一種帶坑中坑基坑的統(tǒng)一理論分析模型；再結(jié)合基坑深度、平面尺寸等影響因素，定性分析了內(nèi)、外坑處于不同位置時帶坑中坑的耦合變形規(guī)律；最后將內(nèi)坑土體視作反向荷載，建立了一種新的分析帶坑中坑基坑的力學(xué)分析模型，并推導(dǎo)出了帶坑中坑基坑應(yīng)力場和位移場解析解。[關(guān)鍵詞] 基坑;坑中坑;應(yīng)力;應(yīng)力場;應(yīng)變場;解析解中圖分類號：TU470+.3 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2013)S2-0132-04作者簡介：宋明健，博士，高級工程，主要從事基坑工程及巖土信息技術(shù)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
