Abstract
In the process of urban subway construction, tunnel construction will inevitably cross the bridge pile foundation and disturb the existing bridge structure. In view of the unstable impact of tunnel construction on the bridge, this paper relies on a tunnel project in Guangzhou and uses MADIS GTS/NX three-dimensional finite element analysis software to reinforce and protect the presence or absence of isolated piles, and simulate the side of the shield tunnel through pile foundation construction according to different working conditions, and analyze the impact of construction on bridge and stratum deformation. The results show that the use of the isolation pile reinforcement protection plan with φ0.8m@1m and the pile length 50m effectively controls the displacement of the ground and the bridge, and also verifies the effectiveness of the reinforcement plan.
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