摘要
为增强地铁盾构隧道的抵御灾害能力,依托某城市邻近既有隧道基坑工程,采用数值计算方法,研究邻近基坑施工情况下隧道变形和内力变化规律,系统分析了管片开裂特性.研究结果表明:基坑开挖过程中,管片衬砌水平与竖向位移增大,正负弯矩增大,轴力减小,开挖加剧了管片衬砌的“横鸭蛋”变形,开挖量直接影响弯矩与轴力变化,与弯矩变化呈正相关,与轴力变化呈负相关.管片裂缝的张开面积呈现阶梯性增长,封顶块所处位置直接决定着管片裂缝的数量与张开面积.
To improve the disaster resistance ability of subway shield tunnels,relying on the existing tunnel foundation pit project adjacent to a certain city,the numerical calculation method is used to study the variation law of tunnel deformation and internal force under the construction of adjacent foundation pits,and the cracking characteristics of segments are systematically analyzed.The research results show that during the foundation pit excavation,the horizontal and vertical displacement values of the segment lining increase,the positive and negative bending moment values increase,and the axial force value decreases.The’elliptical’deformation of the segment lining is exacerbated by excavation,and bending moment and axial force change are directly affected by the amount of excavation,which has a positive correlation with the change of bending moment,and a negative correlation with the change of axial force.The opening area of the segment cracks show a step-by-step growth characteristic,and the position of the key block directly determines the number and opening area of segment cracks.
作者
于阳
孙雅珍
林志军
王金昌
叶友林
YU Yang;SUN Yazhen;LIN Zhijun;WANG Jinchang;YE Youlin(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Transportation and Geomatics Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Huadong Engineering Corporation Limited,Power China,Hangzhou 310058,China;Institute of Transportation Engineering,Zhejiang University,Hangzhou 310058,China)
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2022年第4期337-344,共8页
Journal of Liaoning Technical University (Natural Science)
基金
辽宁省自然科学基金(2018011666-301)
浙江省交通运输厅科技计划项目(2021019)
关键词
隧道工程
基坑开挖
数值计算
裂缝
封顶块位置
tunnel engineering
foundation pit excavation
numerical calculation
cracks
key block position
作者简介
于阳(1992-),男,辽宁阜新人,博士研究生,主要从事盾构隧道结构非线性分析方面的研究;通信作者:孙雅珍(1969-),女,辽宁朝阳人,博士,教授,主要从事结构损伤机制方面的研究.
