By investigating many projects in Shanghai metro construction, notable differences are foundto exist in present design schemes, especially in steel bar content of diaphragm wall and struts load. In thispaper, some design schemes of retaining structures for metro station deep excavations which have the similargeological and structural situations are compared. Their rationality is evaluated and tested according to theresults of field monitoring (e.g. strut load, bending moment of diaphragm wall deduced from lateral deformationcurves). By adopting these measurements, a series of software, calculating models, methods and parameters canbe summarized. Some key factors which affect the correctness of the design are emphasized. Finally, suggestionsthat satisfy demands of safety and economy are given. These suggestions help improve the design of retainingstructures for deep excavation so that the design standard in Shanghai can be unified gradually.
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