Abstract: The proposed rehabilitation engineering for Suzhou’s ancient wall was built along the river and affected by many factors. This case history analyzed the characteristics and difficulties of this project with the technical challenges of using the cement soil mixed columns and bored concrete piles. It was feasible to use the double-row steel sheet piles reinforced between rows. By using different software analysis and monitoring data, this paper analyzed the horizontal displacements of the pile heads. The effect of the eccentric pressure load was considered for the geotechnical design of the supporting structures. The front and rear rows of piles were better integrated and improved the deformation compatible by reinforcing between two rows. The same deformation was raised above the bottom of the excavations.

Key words: Deep Excavation Adjacent to a River, Deep Excavation Supporting Design, Double-Row Steel Sheet Piles, Monitoring