标准环加转弯环盾构管片排版及拼装选型算法研究

Layout and Assembly Selection Algorithm for Standard Ring+Turning Ring Shield Tunnel Segments

[目的]为解决人工进行标准环+转弯环(双面楔形)盾构管片排版和选点中存在的主观性强、计算繁琐、重复工作量大等问题,特对其进行算法研究,以解决实际工程问题。[方法]开发了标准环+转弯环管片自动排版、拼装选型及预测算法软件。基于成熟施工经验,依据隧道线形和管片转角计算管片排版计划,实现了管片排版的自动化计算。提出了综合考虑隧道线形、盾尾间隙、推进油缸行程和盾构机趋势的标准环+转弯环管片选型计算方法和决策算法,实现了管片自动拼装选点。在此基础上,通过建立盾构姿态变化与盾尾间隙和油缸行程变化量的关系式,实现了未来2环标准环+转弯环管片拼装点位和管片型号的预测。[结果及结论]研究成果在广州地铁12号线成功应用,显著提升了现场标准环+转弯环管片排版、选型的工作效率,降低了人力成本,并优化了盾构隧道施工工序。

[Objective]To address the challenges associated with the manual layout and point selection of S+T(standard rings+turning rings(double-sided wedges))in shield tunnel segments,including high subjectivity,complex calculations,and heavy repetitive workload,a research is carried out focusing on algorithm development to resolve practical engineering issues.[Method]An automatic layout,assembly selection,prediction algorithm and software are developed for S+T in tunnel segments.Referring to mature construction experience,segment layout plan is calculated based on tunnel alignment and segment turning angles,and segment layout calculation automation is achieved.The calculation and decision-making methods of S+T segment types are proposed with comprehensive consideration of tunnel alignment,shield tail clearance,hydraulic cylinder stroke,and shield machine trends,enabling the automatic selection and assembly of segment points.Furthermore,by establishing a relationship between shield posture changes and variations in shield tail clearance and cylinder stroke,the algorithm can predict the S+T assembly points and segment types for the two future rings.[Result&Conclusion]The research results are successfully applied to Guangzhou Metro Line 12,significantly improving the efficiency of on-site S+T layout and selection,reducing labor costs,and optimizing the shield tunnel construction process.