摘要
根据南京应天大街长江隧道运行10余年的结构沉降及隧址区河床的监测数据,分析水下盾构隧道在运营期的沉降变化规律。研究表明:盾构隧道的总体沉降主要发生在江底以外的部位,包括明挖段和大堤段等,且80%以上的沉降发生在开通运营后的6 a之内;盾构隧道上方河床的局部冲刷(5 m以内)及水位变化能够引起隧道沉降反应,但不足以产生大的影响,且随着河床回淤能够恢复之前的稳定状态。
Based on the monitoring data of the structure settlement of Yingtian Avenue Yangtze River Tunnel in Nanjing and the riverbed of the tunnel site for more than 10 years,the settlement change law of the underwater shield tunnel during the operation period is analyzed.The results show that the overall settlement of shield tunnel mainly occurs outside the river bottom,including open-cut section and large embankment section,and more than 80%of the settlement occurs within 6 years after the operation.The local scour(within 5 m)of the riverbed above the shield tunnel and the change of water level can cause the tunnel settlement response,but it is not enough to have a big impact,and the stable state can be restored with the return of the riverbed silt.
出处
《城市道桥与防洪》
2023年第3期282-284,M0025,共4页
Urban Roads Bridges & Flood Control
关键词
水下盾构隧道
沉降监测
河床监测
沉降规律
underwater shield tunnel
settlement monitoring
riverbed monitoring
settlement law
