针对盾构隧道施工过程中的盾构轨迹动态纠偏难题，综合分析盾构姿态影响因素，提出盾构轨迹空间S形曲线纠偏方法。依据隧道设计轴线、盾构姿态、盾构尺寸、施工参数等信息，从盾构当前位置开始，结合管片环排版优化算法对盾构轨迹进行预测纠偏，确保盾构逐环切向返回隧道设计轴线指定位置，并给出最佳拼装点位下盾构姿态、管片排版预测控制参数的量化值。集成上述研究成果研制了同济曙光盾构隧道动态纠偏分析软件，通过软件与盾构测量系统数据自动对接，实时对盾构运动轨迹进行动态纠偏，输出预测管片环最佳拼装点位及相应盾尾间隙等施工控制参数。工程应用表明，动态纠偏算法综合考虑盾构当前的状态，适用于不同姿态和轴线线型，结果合理、可靠、通用性强。
In the process of shield tunnel construction, how to
dynamically correct the trajectory of shield is one of the difficult problems.
Through analyzing factors affecting the attitude of shield, an Scurve
correction method for the trajectory space of shield is proposed. Based on
tunnel design axis, shield posture, shield size, construction parameters，etc., shield trajectory is predicted and corrected from its current
position with segmental layout optimization algorithm, which can ensure that
the shield segment returns tangentially to the designated position of the
tunnel design axis one by one, and the quantitative values of predictive
control parameters of shield posture and segmental layout under the optimal
assembly point are given. Integrated with the above research results, the
dynamic deviation correction analysis software of Tongji Shuguang was developed
for shield tunnel. The software automatically interconnects with the data of
shield measurement system, dynamically corrects the motion trajectory of shield
in real time, and outputs construction control parameters such as predicting
the optimal assembly point of segment ring and corresponding shield tail
clearance. The engineering application shows that the dynamic deviation
correction algorithm takes the current state of shield into consideration
comprehensively, and is suitable for shield tunnel with different posture and
axis line, and the results are reasonable, reliable, and universal.
