Behavior and Earth Pressure of the Retaining Piles with Anchors for Deep Excavation

The deep excavation engineeringof the Overseas Exchange Centerof Chengdu takes a structure of retaining piles that use anchors and have ring beamto join the tops of the piles. In this paper, based on the measured reinforcement stresses in the piles during the foundation pit’s excavation, the corresponding mo- ments in the piles are obtained, and the deformation condition of the piles and the earth pressure acting on the piles above the excavation surface are analyzed. Results showthat the ring beam has an appreciable re- striction effect on the lateral displacement and rotation of the pile tops, and the deformation condition of the piles is completely different from that of upright free-head shafts. Under the normal working condition of the retaining structure, the earth pressure above the excavation surface on the piles is quite different from the classical earth pressure theory in distribution and value,