铁道标准设计2025，Vol.69Issue(6)：123-133,11.DOI:10.13238/j.issn.1004-2954.202307060011
穿越走滑断层隧道柔性接头抗错性能试验研究
Experimental Study on Anti-Dislocation Performance of Flexible Joints in Tunnels Crossing Strike-Slip Faults
摘要
Abstract
Based on tunnel engineering projects crossing active fault zones in high-seismic-intensity regions of Western China,large-scale model tests were conducted to analyze deformation patterns,mechanical characteristics,and failure modes of tunnel structures subjected to left-lateral strike-slip fault movement.A detailed study was conducted on integral tunnel structures crossing fault fracture zones,examining the strain response,displacement patterns,internal force distribution,and failure mechanisms of tunnel structures with segmental lining systems and flexible joints.This study aims to investigate the response mechanisms of tunnel structures subjected to fault-induced displacement,and explore the influence of articulated designs on the improvement of anti-dislocation performance.The results demonstrated that a configuration with 15 cm-long lining segments within the fault fracture zone and 30 cm-long transition segments on both sides connected by flexible joints effectively reduced peak values of tensile and compressive strains in the tunnel structures near the fault fracture surface.This achieved an 84.6%strain reduction at the left arch waist.The flexible joints absorbed the dislocation transferred from the surrounding rock to the tunnel structure through shear and torsion deformations,and the displacement curve of tunnel structure exhibited discontinuities at flexible joints.Maximum bending moments occurred at the fault zone and active block interface under strike-slip fault movement,particularly at the arch waist and springing,with the arch waist moment showing a maximum reduction of 87.1%after implementing anti-dislocation measures.The flexible joints prevented large-scale cracking and damage of the lining,limiting damage to localized tension and compressive failures,thereby significantly enhancing the anti-dislocation performance of tunnel structures.The findings of the study provide valuable references for anti-dislocation design of tunnel engineering crossing active fracture zones in high-seismic-intensity areas.关键词
铁路隧道/走滑断层/柔性接头/节段衬砌/抗错断性能/模型试验Key words
railway tunnel/strike-slip fault/flexible joint/segmental lining/anti-dislocation performance/model tests分类
交通工程引用本文复制引用
粟威,陶伟明,匡亮,张熙,申玉生,曹彧,胡炜..穿越走滑断层隧道柔性接头抗错性能试验研究[J].铁道标准设计,2025,69(6):123-133,11.基金项目
国家自然科学基金项目(52278414) （52278414）
四川省自然科学基金项目(2022NSFSC0424) （2022NSFSC0424）
