Abstract: This paper presents the refined numerical modeling results of the deep excavation process by considering the special stressstrain relationship of the soil mass, dewatering boundary conditions as well as the soilpile interactions. The Hardened Soil (HS) model is used in simulating the unloading conditions; the impact of dewatering on the ground subsidence. The Goodman type interface elements are applied at the contact areas between soil and soldier piles to simulate the sliding displacement between the pile and soil. Five conditions are analyzed and compared with the observed results in the case history. The analyzed results are consistent with the observed data.

Key words: Foundation Pits, Deep Excavations, Hardened Soil Model, SoilPile Interaction