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Field measurement analysis of the influence of simultaneous construction of river channel and bridge on existing double shield tunnels

引用

Underground Space 2022年第5期7卷 812-832页

作者： Wenhui Yang Dingwen Zhang Anhui Wang School of Transportation Southeast University2 Southeast University RoadNanjingJiangsu Province 210096PR China China construction Industrial&Energy Engineering Group Co. Ltd.No.6 Wenlan RoadNanjingJiangsu Province 210046PR China

This study presents the construction of a river channel and a bridge adjacent to existing metro tunnels in *** influence of simultaneous construction on these existing tunnels was investigated via 3D numerical modelling to predict tunnel deformation before ***,a targeted protection scheme was developed according to the obtained numerical *** full construction period field monitoring scheme can monitor tunnel responses during ***,the safety of the tunnel structures was evaluated according to the monitoring results,and the evolution of tunnel deformations was *** analytical results can help to clarify the influence characteristics of different construction stages,verify the effect of the proposed protection scheme,and determine the disturbance mechanism of short-distance pile *** to the results,the tunnel deformation mainly occurred during pile construction and river channel excavation,and the tunnel vertical displacement and convergence were mainly affected by the *** anti-floating scheme of the partition excavation and casting effectively controlled the tunnel heave with an alarm value of approximately 6 *** penetration of the short-distance casing resulted in a tunnel *** main construction influence area of the casing pile was within 6D(D is the pile diameter).

关键词： Existing tunnel Field monitoring Casing pile Tunnel deformation adjacent construction

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