大直径盾构隧道施工阶段管片上浮与受力研究  

On Segment Floating and Relevant Mechanical Behaviors during LargeDiameter Shield Tunnelling

作　　者：梁禹[1] 阳军生[1] 林辉[2] 

机构地区：[1]中南大学土木工程学院,长沙410075 [2]铁道第三勘察设计院集团有限公司,天津300142

出　　处：《现代隧道技术》2016年第3期91-97,共7页Modern Tunnelling Technology

基　　金：省级工程建设产学研结合创新计划项目(编号:KY201126)

摘　　要：基于对大直径盾构隧道施工阶段管片上浮原因的分析,文章对长沙市南湖路湘江公路隧道典型管片断面上浮情况进行了介绍。基于此,对管片截面进行力学分析,结合弹性力学方法并考虑管片在上浮力作用下对上覆浆液体或土体的压缩作用,计算得到管片最终上浮量。通过对上浮计算参数敏感性分析,得出地质条件、浆液质量、螺栓剪力、千斤顶残余分力等计算参数对管片最终上浮量的影响。之后,基于工程实例验证了上浮量计算公式的合理性,反推得到了管片截面所受上浮力。最后,基于研究结论与工程实践,提出了有针对性的抗浮措施。In light of the causes of segment uplift during large-diameter shield tunnelling, this paper introducesthe typical segment uplift of the river-crossing highway tunnel of Nanhu Road in Changsha City. The final segmentfloating value was calculated based on the relevant mechanical analysis and elastic mechanics theory and considersthe compression effect on the overlaying grout/soil mass induced by the segment floating. The influences of calcula-tion parameters such as geological conditions, grout quality, bolt shear force and residual force of the jack on the final uplift were obtained through a sensitivity analysis. The rationality of the proposed uplift formula was verifiedbased on the project case and the buoyance applied on the segment section was given by an inverse method; corre-sponding anti-uplift measures were proposed based on the research results and engineering practice.

关 键 词：大直径盾构隧道 管片上浮 土体压缩 敏感性分析 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]