Abstract Braced retaining structure with double-row piles is a new type of retaining structure. The application of this type of retaining structure to an actual case is introduced. The behaviors of the excavation，such as the distribution of the deformations of retaining structure and earth pressure against the structure，are analyzed by FEM. An elastoplastic constitutive model，Drucker-Prager model，is adopted to simulate the behaviors of the soil. The analytical and measured results are compared. The differences between the theoretical data and the measured data are also analyzed. Finally the effects of the length of back-row pile，back-row pile spacing，spacing between the two rows of piles，top beam stiffness，and the strut stiffness are analyzed. The study shows that the deformations of the back-row piles are less than those of the front-row obviously. It also shows that the influences of the spacing between the two rows of piles and the strut stiffness are more distinct than the other factors.
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Received: 31 July 2006
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