盾构隧道施工中土层沉降变化研究

Study on Soil Settlement Change During Shield Tunnel Construction

在介绍盾构施工工序、土层沉降变化等的基础上,结合实际工程,进行项目模型的构建和计算,分析盾构推进过程中地表沉降的变化情况。结果显示,随着开挖的推进,地表横向沉降慢慢加深加宽,地表纵向沉降量不断增大;相较于其他开挖步骤,在盾构通过时相关特征点沉降变化量最大。

Based on the introduction of shield construction process and soil settlement changes, combined with the actual project, the relevant assumptions and models are constructed and calculated, and the changes of surface settlement during shield propulsion are analyzed. The results show that with the advance of excavation, the lateral settlement of the surface gradually deepens and widens, and the vertical settlement of the surface increases continuously. Compared with other excavation steps, the settlement change of related characteristic points is the largest when the shield passes through.