北京交通大学学报2024，Vol.48Issue(1)：32-43,12.DOI:10.11860/j.issn.1673-0291.20230057
盾构下穿高速铁路隧道沉降变形控制标准研究
Study on settlements control standards for shield tunneling beneath high-speed railway tunnels
摘要
Abstract
Addressing the challenging issue of deformation control in newly constructed shield tunnelsbeneath high-speed railway tunnels, baced on three typical high-speed railway crossing projects of Shi-jiazhuang Metro Line 4, Line 5, and Beijing Metro Line 8, this study investigates the standards for controlling settlements and deformations beneath high-speed railway tunnels. Firstly, a refined ballast-less track-tunnel three-dimensional finite element model is constructed using the finite element soft-ware Midas GTS NX.The model calculates the structural internal forces under various settlement con-ditions induced by shield tunneling beneath cast-in-place tunnel, shield tunneling and U-groove sec-tion.It derives the allowable deformation values of structures meeting crack width limits and calculatesthe allowable deformation values of CRTS Ⅱ and CRTS Ⅲ track structures meeting specification lim-its.Subsequently, Abaqus software is employed to build a coupled vehicle-rail dynamic model, com-puting safety and comfort indexes of vehicles under different train speeds and settlement conditions, and deriving allowable values for track height and smoothness.Finally, the study consolidates the al-lowable deformation values of each structure and presents standards for controlling structural settle-ment and deformation.Results indicate that the allowable deformation values of existing structures, computed based on limits of structural crack width, 10 m chord length track height deviation, and dy-namics' most sensitive indexes, can serve as standards for settlement and deformation control of shield tunnels beneath high-speed railway tunnels.These standards can complement existing specifica-tions and provide valuable references for similar high-risk, high-demand projects involving high-speed railway crossings.关键词
盾构下穿/高铁隧道/沉降变形/变形控制标准Key words
shield tunnel underpass/high-speed railway tunnel/settlement deformation/deformation control standard分类
交通运输引用本文复制引用
浦逸辉,彭华,肖骁骐,吴薪柳,林家桢..盾构下穿高速铁路隧道沉降变形控制标准研究[J].北京交通大学学报,2024,48(1):32-43,12.基金项目
中国国家铁路集团有限公司科技研究开发计划重点课题(N2020G009) （N2020G009）
北京市自然科学基金(L211006)China National Railway Group Co.,Ltd.Science and technology research and development plan key subject(N2020G009) （L211006）
Beijing Municipal Natural Science Foundation(L211006) （L211006）
