Research on Control of Existing Bridge Deformation Reinforcement of Isolated Foundation by Jetting Pile
In order to analyze the impact of underpass shield tunnel construction on the safety of bridge structure under the isolation measures of double-pipe high-pressure jet grouting piles,this study examines the strengthening mechanism employed in the construction of Yongguan High-Speed Viaduct′s water transmission tunnel in Guangdong.The analysis focuses on soil displacement,surface settlement,and pier deformation caused by shield tunnel construction.The findings indicate that:Rotary jet grouting piles as reinforcement measures ef-fectively control formation deformations resulting from tunnel construction,minimize soil disturbance during construction,and mitigate vertical displacement and settlement differences in bridge piers caused by tunnel-ing activities while meeting structural deformation requirements.Monitoring data corroborate numerical simu-lation results,guaranteeing the effectiveness of dual pipe rotary jet grouting piles as isolation measures for en-suring bridge safety and normal operation.
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