针对盾构在曲线段施工时轴线控制较难，极易造成盾构偏离轴线、管片破损、管片错台以及纠偏困难等问题，以深圳、福州等地区地铁施工为例，采用以“设计线形偏转量”作为盾构掘进曲线及管片拼装线形偏转量控制要素的方法，达到设计轴线、盾构掘进曲线、管片拼装曲线三线重合的目的，以控制盾构线形及管片线形。根据曲线段转弯半径推算出设计偏转量，并在推进过程中根据设计偏转量控制左右油缸行程，再根据盾构掘进曲线偏转量合理选择管片拼装点位。最后，基于偏转量控制线形的方法在深圳地铁某区间得到了运用，并取得了较好的效果。

During shield tunneling in curved section, it is difficult to control the axis, resulting in attitude deflection, segment damage and dislocation, and hard in correcting deviations. As a result, case studies are conducted on Shenzhen and Fuzhou metros, and the method of designing linear deflection amount is taken as the linear deflection amount when shield tunneling in curved section and segment assembly, so as to realize three line in one(i.e., design axial line, shield tunneling curved line, and segment assembly line) and further control shield attitude and segment assembly line. The design deflection amount is calculated according to the turning radius of the curved section, the left and right cylinder strokes are controlled according to the design deflection amount during the propulsion process, and the segment assembly points are reasonably selected according to the deflection amount of the shield propulsion curve to achieve threeline coaxiality. The application of the method recommended in Shenzhen metro shows a good effect.