摘要
通用管片是盾构隧道中应用较为广泛的管片类型,施工过程中选择不同的拼装点位使拼装完成的管片姿态匹配盾构机姿态,保证盾尾内拼装的管片在盾构机掘进的过程中不被挤压。为实现施工过程中管片拼装点位自动化选取,提升管片拼装质量,本文提出通用型管片拼装点位动态选取方法。利用盾构机掘进参数解算盾构机掘进姿态与管片姿态的空间几何关系,以管片拼装的盾尾间隙变化量为优化控制目标,考虑盾尾平面与管片末端面方向偏差、推进油缸行程差、管片拼装点位对管片拼装盾尾间隙的影响,建立管片拼装动态选取点位的优化函数,可解决盾构施工过程管片点位选取困难的问题。以南京江心洲隧道工程为例,采用MATLAB软件编写管片点位动态选取优化算法,与工程实测盾尾间隙相对比,该方法预测的盾尾间隙与实际吻合较好,验证了该方法的可行性。与人工经验选点方法相比,采用该方法选点后管片拼装盾尾间隙偏差更小,有利于提高管片拼装质量。
Universal segments are a widely used type of tunnel lining segments in shield tunneling.During construction,different assembly positions are selected to ensure that the assembled segments match the attitude of the shield machine,and that the segments at the tail of the shield are not squeezed during the tunneling process.In order to realize automatic selection of segment assembly points in the construction process and improve the quality of segment assembly,a dynamic selection method of general type segment assembly points was proposed.The spatial geometric relationship between the driving attitude of the shield machine and the attitude of the segment is solved by using the driving parameters of the shield machine.With the change of the shield tail clearance as the optimization control objective,the influence of the direction deviation between the shield tail plane and the end surface of the segment,the stroke difference of the propulsion cylinder and the point position of the segment assembly on the shield tail clearance is considered,and the optimization function of the dynamic selection point of the segment assembly is established.It can solve the difficult problem of segment point selection during shield construction.Taking the Jiangxinzhou Tunnel project in Nanjing as an example,MATLAB software was used to edit the optimization algorithm of segment point selection,and the predicted gap of the shield tail was in good agreement with the measured results,which effectively verified the feasibility of the method.Compared with the manual experience method,the gap deviation of shield tail is smaller after the point selection,which is conducive to improving the quality of segment assembly.
作者
姚印彬
胡秋斌
张海涛
王军可
Yao Yinbing;Hu Qiubin;Zhang Haitao;Wang Junke(China Railway 14th Bureau Group Shield Engineering Co.,Ltd.,Nanjing 210000,P.R.China;School of Civil Engineering,Tongji University,Shanghai 200092,P.R.China)
出处
《地下空间与工程学报》
北大核心
2025年第5期1694-1701,共8页
Chinese Journal of Underground Space and Engineering
基金
中铁十四局集团有限公司科研课题(202214jtky0070)。
关键词
通用管片
管片选型
盾尾间隙
油缸行程
成型质量
universal segments
segment selection
shield tail clearance
cylinder stroke
molding quality
