浅埋连拱隧道中隔墙地基受力变形及注浆加固研究
摘要:为研究浅埋连拱隧道中隔墙地基受力变形特征及基底注浆加固方法，依托云南省某拟建高速公路连拱隧道，采用MIDAS/GTS软件进行数值模拟计算和分析。研究结果表明：（1）在围岩较好、埋深较小时中隔墙基底压力分布随施工过程由“马鞍形”分布逐渐变为“钟形”分布，最大基底压力出现在先行洞衬砌浇筑后右侧墙趾处，中隔墙地基总体上处于隆起变形状态；（2）在围岩较差或埋深较大时中隔墙基底压力分布呈“马鞍形”分布，最大基底压力出现在后行洞二衬浇筑后中间偏右处，中隔墙地基总体上处于沉降变形状态；（3）通过数值分析得到不同埋深、地质条件下的连拱隧道中隔墙地基需要满足的承载力，并结合现行规范及前人研究成果，提出了中隔墙岩石地基加固前后地基承载力计算方法。研究成果可为连拱隧道的设计和施工提供参考。
Abstract:In order to study the foundation deformation characteristics of the central separate wall of a shallow-buried multi-arch tunnel and the foundation grouting reinforcement method, the MIDAS/GTS software was used for numerical simulation calculation and analysis based on a proposed expressway multi-arch tunnel in Yunnan Province. The research results show that: (1) When the surrounding rock is good and the buried depth is small, the pressure distribution at the base of the central separate wall gradually changes from the “saddle-shaped” distribution to the “bell-shaped” distribution along with the construction process. The maximum base pressure appears at the toe of the right wall after the lining of the advance tunnel is poured. The foundation of the central separate wall is generally uplifted; (2) When the surrounding rock is poor or the buried depth is large, the pressure distribution at the base of the central separate wall is in a “saddle-shaped” distribution. The maximum base pressure appears at the middle right after the second lining of the rear tunnel is poured. The foundation of the central separate wall is generally in a state of settlement. (3) Through numerical analysis, the required bearing capacity of the partition wall foundation of the multi-arch tunnel under different burial depths and geological conditions is obtained. Combined with the current code and previous research results, a calculation method for the foundation bearing capacity of the central separate wall before and after the rock foundation reinforcement is proposed. The research results can provide reference for the design and construction of multi-arch tunnels.
中文标题：
浅埋连拱隧道中隔墙地基受力变形及注浆加固研究
Foundation Force and Grouting Reinforcement of Central Separate Wall in Shallow Buried Multi-arch Tunnel
作者：
田鲁鲁1,,张智1,郭永发2
Tian Lulu1,,Zhang Zhi1,Guo Yongfa2
作者简介:田鲁鲁，男，1985年生，汉族，江苏连云港人，硕士，高级工程师，主要从事隧道设计及科研工作。E-mail：270642436@qq.com
通讯地址：
1.云南省建设投资控股集团有限公司，云南昆明 650501 2.中铁二院昆明勘察设计研究院有限责任公司，云南昆明 650200
1.YunnanConstructionandInvestmentHoldingGroupCo.,Ltd.,Kunming650501,Yunnan,China 2.KunmingSurveyDesignandResearchInstituteCo.,Ltd.,CREEC,Kunming650200,Yunnan,China
中图分类号:U 452
doi:10.3969/j.issn.1007-2993.2023.03.005
出版物：岩土工程技术
收稿日期:2022-02-07
修回日期:2022-06-24
录用日期:2022-12-09
网络出版日期:2023-06-08
刊出日期:2023-06-08
关键词:连拱隧道,中隔墙,变形,地基承载力,地基加固,数值模拟
Key words:multi-arch tunnel,central separate wall,deformation,foundation bearing capacity,foundation reinforcement,numerical simulation
文档包含图片数量：图片(6)张
文档包含表格数量：表格(5)个
参考文献：
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基金项目：
基金项目:云南省重点研发计划（社会发展领域）项目（2018BC008）
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