盾构隧道开挖面被动失稳的不排水效应分析
摘要:当前对富水黏土地层中的盾构隧道开挖面被动失稳破坏模式的研究较少。为此，提出不排水效应下的盾构开挖面被动失稳破坏理论模型，分别对均质土和成层土工况下的极限支护力函数未知量进行分析，将结果拟合后给出了快速估算极限支护力的理论计算公式。通过对比数值计算结果与理论解析结果，进一步探讨了模型的适用性。结果表明：在浅埋情况下（C/D≤1.0），拱顶上部破坏区的边界近似竖直，与提出的破坏模式设想较为相符，随着埋深比的增大，破坏区对地表的影响也越来越小。
Abstract:The construction environment of shield tunnel becomes more and more complex. However, there are few researches on passive instability failure modes of shield tunnel excavation face in water-rich clay stratum. A theoretical model of passive instability failure of shield excavation face under undrained effect was proposed. The unknown quantity of ultimate support force function was analyzed for homogeneous soil and layered soil respectively. After fitting the results, a theoretical calculation formula for rapid estimation of ultimate support force was given. Finally, the applicability of the model is further discussed by comparing the numerical results with the theoretical results. The results show that under the condition of shallow burial (C/D≤1.0), the boundary of the upper failure zone of the vault is approximately vertical, which is consistent with the proposed failure mode assumption. With the increase of buried depth ratio, the influence of the damaged area on the surface becomes less and less, and even the damaged area does not extend to the surface when buried deeply.
中文标题：
盾构隧道开挖面被动失稳的不排水效应分析
Short-term Undrained Analysis of Passive Instability of Shield Tunnel Excavation Face
作者：
王海峰1,,康博2,李鹏飞2,,,刘增辉1,狄启光2,陈柯屹3
Wang Haifeng1,,Kang Bo2,Li Pengfei2,,,Liu Zenghui1,Di Qiguang2,Chen Keyi3
作者简介:王海峰，男，1971年生，汉族，山西吕梁人，硕士，教授级高级工程师，主要研究盾构隧道施工。E-mail：1920626582@qq.com通讯作者:李鹏飞，男，1983年生，汉族，河南开封人，博士，教授，主要从事隧道及地下工程方面研究。E-mail：lpf@bjut.edu.cn
通讯地址：
1.南通铁建建设构件有限公司，江苏南通 226000 2.北京工业大学城市安全与灾害工程教育部重点实验室，北京 100124 3.中国奥园集团股份有限公司，广东广州 511442
1.NantongRailwayConstructionComponentCo.,Ltd.,Nantong226000,Jiangsu,China 2.KeyLaboratoryofUrbanSecurityandDisasterEngineering,MinistryofEducation,BeijingUniversityofTechnology,Beijing100124,China 3.ChinaAoyuanPropertyGroupLimited,Guangzhou511442,Guangdong,China
中图分类号:U 45
doi:10.3969/j.issn.1007-2993.2023.05.003
出版物：岩土工程技术
收稿日期:2022-05-02
修回日期:2023-03-24
录用日期:2023-07-14
网络出版日期:2023-10-16
刊出日期:2023-10-16
关键词:盾构隧道,被动失稳,开挖面稳定性,不排水效应分析,数值模拟
Key words:shield tunnel,passive failure,stability of excavation surface,undrained effect analysis,numerical simulation
文档包含图片数量：图片(10)张
文档包含表格数量：表格(3)个
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基金项目：
基金项目:国家自然科学基金（51978019）；北京市自然科学基金（8222004）
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