大断面双连拱隧道CD法施工关键技术及变形模型分析

Key Construction Technology and Deformation Model Analysis of CD Method in Large Section Double Arch Tunnel

以台州湾大桥及接线工程刺渡2号隧道为例,介绍CD法施工关键技术,并对隧道周边位移及拱顶沉降变形规律进行分析,通过对监测数据进行拟合,建立指数变形模型。CD法的成功实践为类似大断面双连拱隧道工程提供一定的借鉴作用,指数变形模型可以较好地描述隧道变形规律,模型参数可由Origin软件拟合得到。

By taking Taizhou Bay Bridge and wiring project Situn No.2 tunnel as an example,this paper introduced the CD method construction key technology,and the displacement around the tunnel and the deformation and deformation of the vault were analyzed.Through the monitoring data fitting,it established the index deformation model.The successful practice of CD method provided a reference for similar large-section double-arch tunnel project,and the exponential deformation model can describe the tunnel deformation law well,its model parameters can be fitted by Origin software.