ANALYSIS OF INFLUENCE OF SUBWAY STATION TRANSFER CHANNEL EXCAVATION ON EXISTING PILE FOUNDATION

Based on the design and construction scheme of transfer channel in International Trade Station of Beijing Subway No.10 Line,finite difference method is used to simulate the stress characteristic of existing piles and the displacement law during the excavation under subway station transfer channel construction,and the reasonable construction scheme is brought out.It is proved from the result that,if there aren't reinforcement measures on bridge piles,surface subsidence and settlement of bridge piles are large,and the bridge bearing capacity will be reduced seriously,therefore,the stability of bridge piles will be impacted seriously.As a result,during the excavation process of transfer channel,reinforcement measures are necessary to make sure the stability of bridge piles.