以深圳轨道交通2号线新莲区间隧道为工程背景，针对大跨地铁隧道穿越断层的围岩变形与控制问题，采用FLAC3D数值模拟，分析双侧壁导坑工法与CD工法不同组合穿越断层的围岩变形规律与注浆控制效果。结果表明： 1）隧道穿越断层破碎带时，Ⅳ、Ⅴ级围岩交界并与断层相交的拱顶处以及Ⅴ级围岩与断层相交的拱腰处的围岩位移最大，是变形控制的关键部位； 2）双侧壁导坑法穿越断层对大跨地铁隧道的围岩变形控制较好，工程实际工法组合下围岩变形的最大影响范围为12.4 m，围岩位移控制较好，工法组合合理有效； 3）注浆加固对断层破碎带处围岩变形模式的影响与控制作用明显，注浆后围岩变形区域由未注浆的“枣核形”变为较均匀的“椭圆形”； 4）提出位移控制率均值的概念，以定量描述围岩的注浆效果，隧道穿越断层时3 m厚度注浆的围岩位移控制率均值达51%，围岩变形控制效果较优。

The surrounding rock deformation laws and grouting control effect of largespan XinxiuLiantang Port Tunnel on Shenzhen Rail Transit Line No. 2 are analyzed by FLAC3D numerical simulation method when adopting different combinations of doubleside drift method and CD method crossing fault. The analytical results show that: (1) The maximum displacement occurs at two key deformation control areas, i.e. the intersection of crown top between grade Ⅳ/Ⅴ surrounding rock boundary and the fault zone and the intersection of waist between grade Ⅴ surrounding rock and the fault zone, when tunnel crosses fault and fracture zone. (2) The deformation of surrounding rock is under effective control by adopting doubleside drift method when largespan metro tunnel crosses fault zone; and the maximum influencing scope of surrounding rock under actual construction method combination is 12.4 m. (3) The grouting around the fault and fracture zone has a good effect on surrounding rock deformation mode and control; and the shape of surrounding rock deformation area turned from a date pit to an uniform oval. (4) A quantitative description of the grouting control effect is proposed in surrounding rock displacement. The vertical displacement control rate of surrounding rock with 3 m grouting thickness reaches 51%, which shows a good surrounding rock deformation control effect.