广东土木与建筑

随着城市化进程的加快，地下空间的开发与利用已成为解决城市土地资源紧缺的重要手段。然而，密集城市区域上盖建筑施工对既有隧道结构的影响问题仍缺乏系统研究。以广州市海珠湾隧道南洲段为例，采用Midas GTS/NX软件建立三维数值模型，模拟分析上盖建筑施工过程中隧道的位移效应及土体沉降特征。重点探讨不同施工阶段对隧道竖向位移和周边土体沉降的影响规律。研究结果表明，上盖建筑施工对隧道结构的竖向位移影响显著，尤其是在隧道顶部区域，不同施工阶段的位移分布特征明显。不同建筑质量分布与布局对隧道结构变形产生显著差异，施工引起的土体沉降程度也随建筑特性而变化。研究进一步揭示了建筑施工与隧道结构相互作用的机制，为类似工程的规划设计提供了理论依据，并对风险评估与施工管理具有重要参考价值。

With the acceleration of urbanization,the development and utilization of underground space have become essential solutions to address the scarcity of urban land resources. However,the impact of overlying building construction on existing tunnel structures in densely populated urban areas remains insufficiently studied. This study focuses on the Nanzhou section of the Haizhu Bay Tunnel in Guangzhou. Using Midas GTS/NX software,a three-dimensional numerical model was developed to simulate the displacement effects on the tunnel and the settlement characteristics of the surrounding soil during the construction of overlying buildings. The study primarily investigates the influence of different construction stages on vertical tunnel displacements and soil settlement patterns. The results demonstrate that the construction of overlying buildings has a significant impact on the vertical displacement of tunnel structures, particularly at the tunnel crown, with distinct displacement patterns observed across various construction stages. Variations in building mass distribution and layout were found to produce notable differences in tunnel deformation,while the extent of soil settlement caused by construction also varied with building characteristics.This study provides a deeper understanding of the interaction mechanisms between building construction and tunnel structures,offering theoretical guidance for the planning and design of similar projects and valuable insights for risk assessment and construction management.