大直径盾构隧道施工期内部箱涵的变形特征  

Deformation Characteristics of Inner Box Culverts in Large Diameter Shield Tunnels During Construction Period

作　　者：张亮亮[1] 张西文[2,3] 孙文昊 何应道[1] 李春林[4] 刘俊岩 刘燕[2,3] ZHANG Liangliang;ZHANG Xiwen;SUN Wenhao;HE Yingdao;LI Chunlin;LIU Junyan;LIU Yan(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Hubei,China;School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,Shandong,China;The Engineering Technology Research Center for Urban Underground Engineering Supporting and Risk Monitoring of Shandong Province,University of Jinan,Jinan 250022,Shandong,China;Jinan City Construction Group Co.,Ltd.,Jinan 250131,Shandong,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063 [2]济南大学土木建筑学院,山东济南250022 [3]济南大学山东省城市地下工程支护及风险监控工程技术研究中心,山东济南250022 [4]济南城市建设集团有限公司,山东济南250131

出　　处：《济南大学学报（自然科学版）》2022年第5期560-565,579,共7页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(51979122,51809115);中国博士后科学基金项目(2019M652304);山东省博士后创新项目(201903054);中铁第四勘察设计院集团有限公司科技研究项目(TSYSDY-JLLCHSD[2020]-06)。

摘　　要：为了分析大直径盾构隧道施工期内部箱涵的变形特征,依托济南市在建穿黄大直径盾构隧道工程,开展施工期内部箱涵变形规律现场试验和数值分析研究。结果表明:在重型施工车辆作用下,内部箱涵拼缝处发生相对错动和张开变形,并且随着施工车辆荷载的增大而增大;内部箱涵、管片和周围土层同时发生竖向位移,隧道周围土层竖向位移呈倒漏斗形;经过施工车辆的反复碾压,内部箱涵的连接螺栓锁紧力损失严重,建议对连接螺栓进行二次紧固。To analysis deformation characteristics of inner box culverts in large diameter shield tunnels during construction period, field tests and numerical analysis research on deformation law of the inner box culverts during the construction period were carried out based on a large diameter shield tunnel project in progress across the Yellow River located in Jinan city. The results show that relative dislocation and opening deformation occur at joint of the inner box culverts under action of heavy construction vehicles, which increase with the increase of construction vehicle load. Vertical displacement of inner box culverts, segments, and surround soil layer simultaneously occurs, and the vertical displacement of the soil layer around the tunnel shows an inverted funnel shape. Locking force of connecting bolts of the inner box culverts is seriously lost after repeated rolling by the construction vehicles, so it is recommended to tighten the connecting bolts twice.

关 键 词：大直径盾构隧道 内部箱涵 施工荷载 变形特征 螺栓轴力 

分 类 号：U451[建筑科学—桥梁与隧道工程]