Du and Yang set up interfacial sliding blocks between piles and soils and defined a unified ultimate soil resistance for soil masses based on elasticity theory and - curves on this basis, Du and Yang scrutinized the plastic yield of soil masses and proposed an elastoplastic solution for the effects of foundation pit excavations on their adjacent pile foundations. Therefore, it is necessary to conduct studies on the interactions between foundation pits and their adjacent piles, as well as techniques for deformation control.Īt present, a number of researchers have studied the interactions of foundation pits with adjacent piles and obtained several notable results. Deep foundation pit projects are characterized by large pile loads, high design risks and difficulties, complex foundation pit-pile interactions, and stringent demands for deformation control. However, the excavation of foundation pits will affect adjacent pile foundations via excavation-induced movements in soil mass outside the foundation pit the sliding soil layers also generate additional displacements and bending moments in adjacent piles. The simultaneous appearance of foundation pits and pile foundations is thus becoming increasingly probable. IntroductionĪs society continues to grow, municipal projects like subways are becoming increasingly integrated with large public buildings. The arched wall reinforcement scheme could provide a satisfactory result in terms of the control of horizontal displacements in the pile foundations and project costs. Based on the mechanisms of interaction between foundation pit excavations and the piles of skewed arches, we proposed three reinforcement schemes for controlling the deformations associated with these interactions. We also revealed the mechanism by which deep foundation pits interacted with the pile foundations of adjacent skewed arches. The computational results indicate that the piles of skewed arches interact with the retaining walls of the foundation pits through soil masses. In this work, FLAC3D was used to perform computational analyses on the displacement responses of pile caps and the retaining walls of foundation pits in a variety of cases and reinforcement schemes.
The construction of deep foundation pits is characterized by heavy loads on pile foundations, complex interactions between the foundation pit and pile foundations, and stringent requirements for deformation control.
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