张剑锋, 刘永莉, 申文明,等.小半径曲线盾构隧道管片衬砌力学特性现场试验研究[J].河南理工大学学报（自然科学版）,2026,45(4):67-76.

ZHANG J F, LIU Y L, SHEN W M,et al.Field experimental study on the mechanical behavior of segmental linings in small-radius curved shield tunnels[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(4):67-76.

小半径曲线盾构隧道管片衬砌力学特性现场试验研究

张剑锋1, 刘永莉2, 申文明1, 吴文兵3, 戴志浩4,5, 杨果林5

1.中铁二院华东勘察设计有限责任公司，浙江 杭州  310043;2.湖北工业大学 土木建筑与环境学院，湖北 武汉  430068;3.中国地质大学（武汉） 工程学院，湖北 武汉 430074;4.南昌大学 工程建设学院，江西 南昌 330031;5.中南大学 土木工程学院，湖南 长沙  410075

摘要: 目的 为探究小半径曲线盾构隧道施工期管片的力学特性，通过现场试验和理论分析，研究不同转弯半径下的围岩压力和管片内力演化规律。  方法 选取湖南长沙万家丽路电力隧道S形曲线区间内的直线段、半径R为150，300 m曲线段为试验段，在管片关键位置预埋土压力盒和钢筋应力计，进行连续监测。同步采用均质圆环法和梁-弹簧法进行衬砌内力计算，并将计算结果与实测数据进行对比分析。 结果结果表明，小半径曲线盾构隧道施工期管片衬砌的力学特性受曲率半径影响显著。与直线段相比，曲线段围岩压力和管片内力达到稳定状态所需的盾构推进环数明显增加，且转弯半径越小，稳定历时越长。曲线段隧道围岩压力与衬砌内力分布呈明显的内外侧不对称特征，R=300 m曲线段内侧围岩压力整体高于外侧。现场实测结果显示，隧道下半部分管片弯矩普遍大于均质圆环法和梁-弹簧法的理论计算值，且该差异在R=150 m曲线段中更为显著。  结论小半径曲线盾构隧道施工过程中存在显著的曲线效应，曲线段衬砌结构更易在内侧产生不利受力状态。设计分析与施工控制参数需结合施工期现场监测结果进行优化。

关键词:盾构隧道;小半径曲线;管片衬砌;现场试验

doi:10.16186/j.cnki.1673-9787.2025120029

基金项目:国家自然科学基金资助项目（51778641）；中铁二院工程集团有限责任公司科技开发计划项目（KSNQ243025）

收稿日期:2025/12/10

修回日期:2026/04/17

出版日期:2026/06/17

Field experimental study on the mechanical behavior of segmental linings in small-radius curved shield tunnels

Zhang Jianfeng1, Liu Yongli2, Shen Wenming1, Wu Wenbing3, Dai Zhihao4,5, Yang Guolin5

1.China Railway Eryuan East China Survey and Design Co.， Ltd.， Hangzhou  310043， Zhejiang， China;2.School of Civil Engineering， Architecture and Environment， Hubei University of Technology， Wuhan  430068， Hubei， China;3.Faculty of Engineering， China University of Geosciences， Wuhan  430074， Hubei， China;4.School of Infrastructure Engineering， Nanchang University， Nanchang  330031， Jiangxi， China;5.School of Civil Engineering， Central South University， Changsha  410075， Hunan， China

Abstract: Objectives To investigate the mechanical behavior of segmental linings in small-radius curved shield tunnels during construction， field tests and theoretical analyses were conducted to study the evolution of surrounding rock pressure and segment internal forces under different curvature radii.  Methods Straight sections and curved sections with radii of 150 m and 300 m in the S-shaped section of the Wanjiali Road power tunnel in Changsha， Hunan Province， were selected as test sections. Earth pressure cells and reinforcement stress gauges were embedded at key positions of the segments for continuous monitoring. Meanwhile， the homogeneous ring method and the beam-spring method were employed to calculate the internal forces of the linings， and the calculated results were compared with field measurements. Results The results indicate that the mechanical behavior of segmental linings during construction is significantly influenced by the curvature radius. Compared with straight sections， curved sections require a larger number of shield advance rings for the surrounding rock pressure and segment internal forces to reach stable states， and the stabilization duration increases as the curvature radius decreases. The distributions of surrounding rock pressure and lining internal forces in curved sections exhibit pronounced asymmetry between the inner and outer sides. In the curved section with a radius of 300 m， the surrounding rock pressure on the inner side is generally higher than that on the outer side. Field measurements further show that the bending moments of segments in the lower part of the tunnel are generally larger than those predicted by the homogeneous ring method and the beam-spring method， and this discrepancy becomes more significant in the curved section with a radius of 150 m.  Conclusions During the construction of shield tunnels on small-radius curves， a significant curve effect exists， making the lining structure on the inner side of the curved section more prone to unfavorable stress conditions. Design analysis and construction control parameters need to be optimized in conjunction with field monitoring results obtained during the construction period.

Key words:shield tunnel;small radius curve;segment lining;field test