近接隧道等地下结构由于其空间位置及多条隧道的特殊性，在工程开挖时，影响工程建设的因素比单一洞室和独立结构施工时多，这些额外的影响因素会引起周围岩体应力重分布甚至再次重分布，导致围岩和结构一系列的力学行为变化。交叉隧道是近接隧道中的一种，施工时，其加载、卸载效应，横向、纵向及空间效应等会因隧道开挖的时间先后、空间位置及开挖方式的不同而不同。本文依托广州地铁5号线与6号线交叉段近接施工工程，通过ABAQUS三维建模，对5号线上跨6号线方案进行研究，通过分析发现，既有结构物6号线隧道在新建5号线隧道施工完成后，其永久初期支护内力并未因新建5号线隧道的影响而显著增大，相比，地表沉降的变化要大得多。对此，本文通过比较其相互间内力、变形的影响关系，为实际工作中优化设计方案、选择合理施工顺序提供理论依据。

Due to the special spatial relationship and multitube characteristics of neighboring tunnels, the construction of neighboring tunnels can cause the redistribution of the stress of the surrounding rocks of the tunnels, which may lead to a series of mechanical behavior variation. Crossing tunnels belongs to neighboring tunnels. During the construction of crossing tunnels, the loading and unloading effect and the horizontal, vertical and spatial effect vary depending on the spatial location, excavation sequence and excavation method of the crossing tunnels. This article relies on the construction of the tunnel section where Line 5 of Guangzhou Metro crosses above Line 6, so as to make study on the construction of the tunnel section of Line 5 crossing Line 6, with threedimensional modeling via ABAQUS. This analysis reveals that the internal forces of the permanent support of tunnel of Line 6 is not so much affected by the construction of the tunnel of Line 5, while the ground surface settlement is relatively seriously affected by the construction of the tunnel of Line 5. This paper compares the mutual influence relationships of internal forces and deformation between Line 5 and Line 6, so as to provide a theoretical basis to optimize the design scheme and to choose reasonable construction sequence in practical work.