地下通道施工期复合式衬砌变形特征研究

Study on Deformation Monitoring of Composite Lining of Underground Passage

以武汉市雄楚大街华中师范大学地下通道施工为例,建立了基于荷载结构法的复合式衬砌结构数值计算模型,探究二次衬砌的受力特性。研究结果表明:二次衬砌竖向位移在通道上拱部分呈现由通道中心向两侧方向逐渐增大,下拱部分呈现由通道中心向两侧方向逐渐减小的特征,模拟结果为监测点的布设提供了依据。在充分考虑通道施工过程监测的基础上,提出了对复合式衬砌通道全面有效监测的布设方法。

Taking the underground passageway of the Central China Normal University in Wuhan as an example, a numerical model of composite lining was established. Based on load structure method, the deformation monitoring of lining structure was comprehensive and effective,for the stability of tunnel construction period. The deformation characteristics of secondary lining was studied. The results show that, the vertical displacement of secondary lining increases gradually on the upper arch from the center of the tunnel to the two sides of the tunnel, which is contrary to the lower arch. The simulation results provided the basis for the layout of monitoring points. On the basis of fully considering the monitoring of tunnel construction process, the layout method of comprehensive and effective monitoring of composite lining channel was put forward.