盾构隧道通用管片环自适应多环往复排版算法

Adaptive Multi-ring Alternating Layout Algorithm for General Segmental Rings in Shield Tunnel

  • 摘要: 针对现有管片环排版耗时费力、误差大等问题,提出一种自适应多环往复排版算法,并进一步优化管片环排版结果,使其满足错缝拼装和封顶块尽量位于拱腰的拼装要求。结果显示:(1)自适应多环往复排版算法可有效控制管片环排版误差,计算结果表明该算法下最大排版误差和平均排版误差为传统无往复排版算法的29.27%和55.12%;(2)相较于传统无往复排版算法,自适应多环往复排版算法下封顶块位于拱腰的管片环比例提高37.43%,错缝拼装的管片环比例提高122.67%,更满足拼装要求;(3)相较于确定往复区间的多环往复算法,自适应往复算法可根据计算结果自动调整往复区间大小,显著减少计算次数,误差控制效果更好。

     

    Abstract: To address the problems of time-consuming and labor-intensive processes and large layout deviation in current segmental ring arrangement procedures, an adaptive multi-ring alternating layout algorithm is proposed, and the segment ring layout results are further optimized to meet the assembly requirements of staggered joints and having the top closure blocks as much as possible positioned at the arch waist. The results show: (1) The adaptive multi-ring alternating layout algorithm can effectively control segment ring layout errors. Calculation results indicate that under this algorithm, the maximum layout error and the average layout error are 29.27% and 55.12% of those under the traditional non-alternating layout algorithm, respectively; (2) Compared with the traditional non-alternating layout algorithm, under the adaptive multi-ring alternating layout algorithm, the proportion of segment rings with top closure blocks at the arch waist increases by 37.43%, and the proportion of segment rings with staggered joints increases by 122.67%, better meeting assembly requirements; (3) Compared with the multi-ring alternating algorithm with a fixed alternating interval, the adaptive alternating algorithm can automatically adjust the alternating interval size based on calculation results, significantly reducing the number of calculations and providing better error control.

     

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