黑龙江科技大学学报2025，Vol.35Issue(1)：110-116,7.DOI:10.3969/j.issn.2095-7262.2025.01.017
可液化场地中盾构隧道注浆加固抗液化技术研究
Research on anti-liquefaction technology of grouting reinforcement for shield tunnel in liquefiable site
摘要
Abstract
This paper is concerned with the insight that liquefaction of saturated sand layers during strong earthquakes poses serious threats to interval tunnel structures,making the study of anti-liquefaction measures for shield tunnels crucial for improving seismic design and ensuring structural safety.By taking Beijing Metro Line 22,which traverses a severely liquefiable soil section,the study involves developing a numerical model by using FLAC3D software;introducing the excess pore water pressure ratio(PPR)as an indicator to assess the degree of soil liquefaction;and analyzing the response characteristics of tunnel in-ternal forces,deformations,and PPR values in sand layers under different burial depths before and after grouting reinforcement.The results indicate that the soil at the crown,haunch,and footing of the tunnel exhibits low or no liquefaction,while the liquefaction is more likely to occur at the spandrel and invert.Grouting reinforcement effectively reduces the PPR values of the soil surrounding the tunnel,demonstra-ting significant anti-liquefaction effects.After reinforcement,the tunnel structure's internal forces and di-ameter convergence rates are significantly reduced.The grouting technology can effectively control the in-ternal forces of the tunnel structure and prevent the damage to the segments caused by excessive forces.关键词
盾构隧道/液化/饱和砂土/注浆加固/抗液化技术Key words
shield tunnel/liquefaction/saturated sand/grouting reinforcement/anti-liquefaction tech-nology分类
交通运输引用本文复制引用
李名淦,贾明辉,栗书亚,潘菁,陶连金..可液化场地中盾构隧道注浆加固抗液化技术研究[J].黑龙江科技大学学报,2025,35(1):110-116,7.基金项目
国家自然科学基金项目(42072308) （42072308）
北京市自然科学基金项目(8242005) （8242005）
