Abstract: A case history of the deep excavation in soft soils supported by the combination of gravity retaining wall, soil nail wall and pilestrut is presented in this paper. The paper compares the feasibility, advantages and disadvantages of this combination method with the application of one of the three methods alone in the deep excavation. The construction monitoring data indicated that this method can be successfully used in the deep excavation project in soft soils with an excavation depth between 7 and 10 meters.

Key words: Deep Excavation Support, Combination of Supporting Methods, Gravity Retaining Wall； Soil Nail Wall； Pile Strut