Abstract：Research purposes: The principles and the thoughts on the met}lod for construction of big，deep and complex foundation pit for integrated transport hub are offered，and the methods for determining the parameters of building exterior—protected system and large—space bracing system for multi—step foundation pit aye discussed．
Research conclusions: The construction scheme of the foundation pit for integrated transport hub should be determined in accordance with the overall thoughts．The construction scheme and the relative parameters should be chosen with numerical simulation and calculations．As there is no criterion for determining the parameters for the exterior—protected construction for the multi—step foundation pit，80 the parameters for the exterior—protected for such foundation pit should be determined in accordance with the ratio of unloaded width(B)and foundation pit depth(H)，the construction method and dewatering condition．For arranging the large—space bracing system and determining its parameters，the concept and principle of equivalent stiffness and even stiffness should be followed and the influence factom of the change of environment temperature，heave and settlement of the bracing column and construction loads should be considered．
徐向辉. 虹桥综合交通枢纽深大基坑关键技术研究[J]. 铁道工程学报, 2009, 26(6): 44-49.
XU Xiang——hui. Research on the Key Technology for Big and Deep Foundation Pit for Shanghai Hongqiao Integrated Transport Hub. 铁道工程学报, 2009, 26(6): 44-49.
2009, Vol. 26 
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