軟土地區(qū)地鐵車站深基坑開挖中框架逆作法的設計與應用
羅發(fā)揚,賈堅
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(同濟大學建筑設計研究院,上海 200092)[摘要]綜合明挖順作法開挖速度快、樓板逆作法剛度大的優(yōu)點,運用明挖與逆作相結合的框架逆作法,在深基坑關鍵部位以樓板的框架體系代替支撐,在留出大量出土空間的同時,支撐體系的整體剛度得以加強,從而充分利用“時空效應”原理,加快土體開挖和支撐安裝速度,達到控制基坑變形、保護基坑周邊環(huán)境的目的。
[關鍵詞]深基坑;框架逆作法;變形控制Application of Frame-top-down Construction in Deep Excavation of Subway Station in Soft ClayLuo Fayang,Jia Jian(Architectural Design & Research of Tongji University,Shanghai 200092,China)Abstract:The frame-top-down construction method is put forward,which combines the quickconstruction feature of open excavation and the rigid-stiffness feature of top down excavation. The brace is replaced by the frame at the pivotal place of the deep pit,the large area for excavation is remained, and the stiffness of the brace system is improved. So,the time-space effect method is applied to accelerate the excavation and brace making and control the pit deformation and protect the environment.Keywords:deep pit; frame-top-down construction method; deflection control作者簡介:羅發(fā)揚(196-),男,學士。E-mail:luofy01@126.com。參考文獻
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