中国铁道科学2026，Vol.47Issue(3)：196-206,11.DOI:10.3969/j.issn.1001-4632.2026.03.17
环缝直螺栓复拧对盾构隧道接头力学性能影响试验研究
Experimental Study on the Influence of Circumferential Straight Bolts Retightening on the Mechanical Properties of Shield Tunnel Joints
摘要
Abstract
To improve the effectiveness of differential settlement remediation for subway shield tunnels and clarify the influence of circumferential straight bolts retightening,the test device was designed and the full-scale tensile test on the circumferential joint of shield tunnel segments with straight bolts was conducted based on an actual subway shield tunnel.Based on data such as segment strain-load curves and circumferential joint opening-load curves,the variation patterns of segment strain and the tensile stiffness of circumferential joint before and after retightening straight bolts were analyzed,and the enhancement effect of retightening on the longitudinal stiffness of the shield tunnel after differential settlement remediation was quantified.The results indicate that under the same tensile loading condition,different geometric configurations of the joint interface between adjacent segments result in differences in strain distribution and variations in the location of the maximum strain value.After retightening,the contact area between the segments and bolts increases,and the strain at various measurement points on the joint interface of segments shows a slight increase,while the strain trend remains essentially unchanged compared with that before retightening.When the retightening torque is set to 486.00 N·m,the tensile stiffness of the joint increases by approximately 23％after retightening,and the longitudinal stiffness of the shield tunnel increases by approximately 18.3％,indicating a significant improvement in the longitudinal stiffness of the shield tunnel due to retightening.For tunnels where differential settlement remediation has been completed,it is recommended to remove the handhole mortar and retighten the tunnel circumferential joint bolts to enhance the longitudinal stiffness of the shield tunnel.The test results can provide an experimental basis for optimizing differential settlement remediation measures.关键词
盾构隧道/管片接头/直螺栓/纵向刚度/环缝接头复拧/不均匀沉降整治/足尺试验Key words
Shield tunnels/Segment joints/Straight bolts/Longitudinal stiffness/Circumferential joint retightening/Differential settlement remediation/Full-scale test分类
交通工程引用本文复制引用
黄大维,胡新平,庄海洋,郑凯丽,陈永青,谢齐胜..环缝直螺栓复拧对盾构隧道接头力学性能影响试验研究[J].中国铁道科学,2026,47(3):196-206,11.基金项目
国家自然科学基金资助项目(52378398) （52378398）
江西省主要学科学术和技术带头人领军人才项目(20232BCJ22009) （20232BCJ22009）
江西省自然科学基金资助项目(20242BAB26077) （20242BAB26077）
