平行盾构掘进对先行盾构隧道结构影响研究  

RESEARCH ON THE INFLUENCE OF PARALLEL SHIELD TUNNELING ON THE STRUCTURAL RESPONSE AND GROUND SETTI EMENT OF ANTECEDENT SHIELD TUNNEL

作　　者：朱骏 Zhu Jun

机构地区：[1]深圳市交通公用设施建设中心,广东深圳518000

出　　处：《建筑技术开发》2024年第4期60-62,共3页Building Technology Development

摘　　要：为探明平行盾构掘进对先行盾构隧道结构的影响,基于有限元分析,探讨先主线后匝道、先匝道后主线两种不同的施工工况,研究后行隧道地层损失率对先行隧道结构的影响。结果表明,后行隧道对先行隧道结构内力和变形的影响与后行隧道地层损失率基本呈线性关系;先开挖主线隧道再开挖两侧匝道的工况,匝道地层损失率的变化对主线隧道结构变形的影响程度明显小于先开挖匝道后开挖主线隧道的工况。综合对比两种工况,得出先开挖主线隧道后开挖匝道的施工方式相对合理。In order to understand the impact of parallel shield tunneling on the structural response of the antecedent shield tunnel,based on the finite element analysis,two different construction conditions,main line before ramp and ramp before main line,were discussed.The impact of the volume loss rate of the newly built tunnel on the structural response of the antecedent tunnel was studied.The results indicate that the impact of the newly built tunnel on the internal force and deformation of the antecedent tunnel structure is primarily linearly correlated with the volume loss rate of the newly built tunnel.The construction condition of excavating the mainline tunnel first and then the ramps on both sides,the impact of the change in the volume loss rate on the structural deformation of the mainline tunnel is significantly smaller than the construction condition of excavating the ramps first and then the mainline tunnel.By comprehensively comparing the two construction conditions,it is concluded that the construction method of excavating the mainline tunnel first and then excavating the ramp is relatively reasonable.

关 键 词：盾构隧道 平行盾构 地层损失率 数值分析 

分 类 号：TU653[建筑科学—建筑技术科学]