不均匀地基下核电沉管隧道接头抗震性能分析  

Seismic performance analysis of nuclear immersed tube tunnel joint under uneven foundation

作　　者：赵杰[1] 王翠翠 甘长江 ZHAO Jie;WANG Cuicui;GAN Changjiang(College of Civil Engineering and Architecture,Dalian University,Dalian 116622,China;Gansu Comprehensive Railway Engineering Contracting Co.,Ltd.,Lanzhou 730030,China)

机构地区：[1]大连大学建筑工程学院,辽宁大连116622 [2]甘肃综合铁道工程承包有限公司,甘肃兰州730030

出　　处：《广西大学学报（自然科学版）》2023年第4期821-834,共14页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金重点项目(51738010);大连市科技创新基金计划项目(2021JJ13SN83)。

摘　　要：为了研究不均匀地基条件下海域沉管隧道接头的抗震控制指标,探讨了接头张开量、变形及内力分布特征,以海南昌江核电3、4号机组沉管隧道为工程背景,考虑土结相互作用,建立不均匀地基条件下沉管-接头-土体三维精细化有限元模型,选取了不同硬度GINA止水带,通过动力时程方法进行分析。研究结果表明:地层的变化对沉管管节接头抗震性能的影响较大,随着GINA止水带刚度增大,接头抗震控制指标均逐渐减小,变化趋势逐渐变缓,当超过一定值时,再增加刚度对接头抗震控制指标几乎没有影响。In order to explore the seismic control index of submerged tube tunnel joint in sea area under the condition of uneven foundation,the characteristics of joint opening,deformation and internal force were discussed.This paper took the immersed tube tunnel of No.3 and No.4 Nuclear Power units of Hainan Changjiang Nuclear Power Plant as the engineering background and used the dynamic time history analysis method to analyze.In this process,considering soil-knot interaction,the researcher established a three-dimensional fine finite element model of sinking pipe-joint-soil under uneven foundation condition,in which GINA water stop belt with different hardness were selected.The research results show that the change of stratum has a great influence on the seismic performance of the sink pipe joint.With the increase of the stiffness of GINA water stop belt,the seismic control index of the joint decreases gradually,and the amount of reduction also decreases gradually.When it exceeds a certain value,the increase of the stiffness has almost no influence on the seismic control index of the joint.

关 键 词：不均匀地基 沉管隧道 接头 动力时程法 抗震分析 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]