Analysis of the Influence of Shield Tunnel Side Crossing Yunba Viaduct
In order to ensure the safe operation of Yunba,the impact caused by the shield tunnel passing through the Yunba viaduct at close range should meet certain requirements.To this end,numerical simulations were used to analyze the changes in the horizontal displace-ment,vertical displacement,and settlement difference of the bridge piers during the process of shield tunneling passing through the Yunba Elevated Bridge,and compared with the actual monitoring results during shield tunneling.The results show that the maximum settlement of the pile foundation was 1.120 mm,and the maximum differential settlement of the entire track was 1.088 mm.The maximum displacement of the pile foundation top under each working condition meets the requirements of the indicators;The impact of shield tunneling on elevated bridges located in medium to slightly weathered rock environments was relatively small,and the construction measures were mainly con-trolled by shield tunneling;The trend of changes in numerical simulation and monitoring results was basically consistent,but the actual de-formation monitored was smaller than that of numerical simulation.The analysis and comparison results indicate that the impact of the shield tunnel passing through the Yunba Elevated Bridge was relatively small,the design was reasonable,the construction measures were effective,and it has certain reference value for similar projects.
万方数据
维普
