中国铁道科学2025，Vol.46Issue(2)：104-118,15.DOI:10.3969/j.issn.1001-4632.2025.02.10
考虑横断面几何参数的高速铁路预制拼装式明洞衬砌分块设计与拼装方法
Partition Design and Assembly Method on Prefabricated and Assembled Open Cut Tunnel Lining of High-Speed Railway Considering Cross-Section Geometric Parameters
摘要
Abstract
Based on a single-tube double-track large-span tunnel project of high-speed railway with a design speed of 350 km·h-1,the assembled open cut tunnel lining is investigated from 2 aspects of design and construction.Firstly,the inner contour and cross-sectional form of the lining are determined by combining factors such as construction limit and safety evacuation passageway.Subsequently,based on the fundamental principles of plane geometry,a partition method of prefabricated segments considering the geometric parameters of the cross-sectional form of the open cut tunnel lining is proposed.Finally,on the basis of optimizing the structural form,the structural design and assembled method of prefabricated segments are put forward.The results show that the tunnel cross-section of this project is designed as a multi-centered circular curved side wall arch section with an inverted arch,aiming at enhancing the overall stability and operational lifespan of the open cut tunnel.After optimization,the single-ring lining is designed as 3 A-type prefabricated segments,2 B-type prefabricated segments and 1 C-type prefabricated segment,and the bending moments at each joint of the lining are minimized or even 0.The prefabricated segments are assembled with semi-circular tenon joints in the circumferential direction and frustum-shaped tenon joints in the longitudinal direction.Additionally,the overall waterproofing performance of the lining is enhanced through the use of slow-expanding water stop strips,drainage pipes,and drainage ditches.In the procedure of assembling single-ring,the C-type prefabricated segment at inverted arch are assembled firstly,then the B-type prefabricated segments at arch shoulder are assembled,and finally the A-type prefabricated segments at arch are assembled,in which the front and rear adjacent prefabricated segments are aligned,and the integral assembly of the open-cut tunnel lining is completed by means of through joint.关键词
高速铁路/单洞双线大跨度隧道/预制拼装式明洞/横断面设计/新型钢筋混凝土预制块/几何参数Key words
High-speed railway/Single-tube double-track large-span tunnel/Prefabricated and assembled open cut tunnel/Cross-sectional design/Novel reinforced concrete prefabricated segment/Geometric parameters分类
建筑与水利引用本文复制引用
周晓军..考虑横断面几何参数的高速铁路预制拼装式明洞衬砌分块设计与拼装方法[J].中国铁道科学,2025,46(2):104-118,15.基金项目
国家自然科学基金资助项目(51378436) （51378436）
四川省重点研发计划项目(2019YFG001) （2019YFG001）
