软土地区地铁矩形隧道长期沉降规律及预测

针对运营中的软土地区某地铁区间矩形隧道的病害发展情况,从大量监测数据入手,分析研究隧道变形发展在各个时期的规律(结构自身应力平衡、土层固结、周边环境变化),发现该区域隧道变形主要受软弱地质条件及周边物业开发影响。同时,针对计算结果,分析该隧道各个区段沉降发展趋势,认为在无外部影响情况下,隧道沉降呈收敛趋势。为该隧道的沉降治理提供有效的理论依据,也为类似工程提供参考。

Long-term Settlement and Predictive Analysis of Rectangular Subway Tunnels in Soft Soil Areas

The development law of tunnel deformation in various periods are explored in terms of self-stress eqtuilibrium of the structure,the liquefiable soil and changes in the surrounding environments,by using the monitoring data of the disease changes of the in-service rectangular tunnel located in soft soil areas.It is found that the problem of runnel diseases was mainly influenced by weak geological conditions and the surrounding property development in the area.At the same time,the development of deformation in each section of the tunnel is analyzed on the basis of the calculation results.Under the condition of no external influence,the settlement of the tunnel is convergent,which provides effective theoretical basis for the settlement of the tunnel,and also presents references for similar projects.