Analysis of the Impact of Subway Station Proximity Construction on Operating Bridges
Based on the Dalian Metro Xianggongjie Station concealed excavation close to the operating bridge project,the impact of concealed excavation construction on bridge pile foundation under different working conditions is studied by numerical simulation method.The results show that:compared with two-stage excavation,the maximum settlement of pile foundation can be reduced by 18.5％in three-stage excavation,and the footing bulge can be reduced by 19.0％,and the settlement control is obvious;when the grouting in the hole reaches 1.0 times of the original stiffness of the surrounding rock,the effect of grouting is the most obvious,and the settlement control rate is more than 25.0％.the effect of adding two rows of isolation piles on the bearing platform is the smallest,which reduces the settlement by 21.0％compared with one row of isolation piles and reduces 60.0％compared with the one row of isolation piles without isolation piles.The field monitoring data and numerical simulation results have the same trend and the displacement difference is not big,which indicates that the reinforcement scheme is safe and effective.
万方数据
维普
