穿江隧道拱顶沉降的三维有限元分析

以浏阳河穿江隧道西线单洞CD法开挖为例，利用Ansys有限元软件对隧道开挖过程进行了三维动态模拟分析，得到在CD法开挖下隧洞拱顶沉降值，并与实际监测数据进行对比，总结了在该工程条件下隧道拱顶沉降的特点和变化规律，为以后类似的工程提供借鉴、依据和指导.研究表明：拱顶沉降随空间位置变化不明显；隧道上层覆土固结程度越高，拱顶沉降越小；加固区范围适合，抗渗性良好，渗流对拱顶沉降有一定的积极作用.

Three-Dimensional Finite Element Analysis for the Displacement of River-Crossing Tunnel Vault

The research is based on the western tunnel crossing the Liuyanghe river.Ansys software is used to simulate the three-dimensional excavation with CD method.The displacement data of tunnel vault obtained is compared with the real data.The displacement characteristics and charge regularities of this project are summarized.The research provides reference and experience for the future similar project.The results show that:the vault displacements change slowly with space location;the soil consolidation is better...