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.
LIU Xingen, WANG Bozhi, LIU Xiaodi
. Track Deviation Correction Method of Shield Based on
Space S-Curves[J]. Tunnel Construction, 2023
, 43(S1)
: 457
-463
.
DOI: 10.3973/j.issn.2096-4498.2023.S1.053
