软土地铁隧道沉降治理效果评估

Evaluation of Correction Effects of Subway Tunnel Settlement in Soft Ground

基于某地铁隧道沉降治理过程中的实测数据,研究沉降治理效果评估方法。首先利用3次样条曲线插值法对隧道沉降监测点数据拟合,计算出累计沉降的曲率半径;然后以等效轴向刚度模型为基础,推导出盾构管片接头环缝张开量和纵向连接螺栓受力情况。通过理论计算对治理后隧道结构健康状态作出评估,全面分析隧道沉降治理效果,为后期运营维护提供依据。

This study is based on the deformation monitoring data of a tunnel settlement project.The fitting of the deformation curve is performed using the cubic spline interpolation method,and the openings of the segment joints and the constraints on connection bolts are analyzed based on an equivalent axial stiffness model.The results demonstrate the safety status of a post-correction tunnel structure and clarify the correction effects of the tunnel settlements.These results could provide reference for the operation and maintenance of the tunnel structure in the future.