摘要
随着我国城市化进程的不断加深,地铁隧道建设常采用小曲率隧道区间设计以避开复杂既有建筑物,同时盾构隧道开挖造成的事故时有发生,因而小曲率隧道开挖影响更应受到重视。为了解当前复杂土工环境下小曲率盾构隧道开挖影响研究状况与学术动向,归纳了国内外在邻近基坑、既有隧道(管线)桩基构筑物、地面密集建筑群等土工环境下小曲率隧道开挖影响的研究成果、热点问题和发展方向。按照3种不同土工环境对现有研究成果进行分类讨论;然后从理论解析、数值模拟及现场监测方面对各类环境下小曲率隧道开挖影响的研究进展进行阐述;最后提出不同土工环境的既有研究中存在的不足与空白,建议考虑基坑开挖中卸载和降水耦合作用下的小曲率隧道开挖影响、非线性土体变形和多层非均质地层、更全面性的敏感参数分析、完善和扩大监测数据库。
With the deepening of urbanization in China,the construction of subway tunnels often adopts the design of small curvature tunnel sections to avoid complex existing buildings.At the same time,accidents caused by shield tunnel excavation occur from time to time,so the influence of small curvature tunnel excavation should be paid more attention to.In order to understand the current research status and academic trends of the influence of small curvature shield tunnel excavation in complex geotechnical environment,the research results,hot issues and development directions of the influence of small curvature shield tunnel excavation in geotechnical environments such as adjacent foundation excavation,existing tunnel(pipeline)pile foundation structures,and dense ground buildings at home and abroad are summarized.The existing research results are classified and discussed according to three different geotechnical environments.Then,the research progress of the influence of small curvature tunnel excavation in various environments is expounded from the aspects of theoretical analysis,numerical simulation and field monitoring.Finally,the shortcomings and gaps in the existing research on different geotechnical environments are put forward.It is suggested to consider the influence of small curvature tunnel excavation under the coupling effect of unloading and dewatering in excavation,nonlinear soil deformation and multi⁃layer heterogeneous strata,more comprehensive sensitive parameter analysis,improvement and expansion of monitoring database.
作者
叶青荣
YE Qingrong(Shanghai Pudong New Area Construction(Group)Co.,Ltd.,Shanghai 201206,China)
出处
《施工技术（中英文）》
CAS
2024年第16期11-20,共10页
Construction Technology
基金
上海市住房和城乡建设管理委员会2023年度科研项目(沪建科2023⁃Z03⁃001)。
关键词
隧道
基坑
盾构
数值模拟
监测
研究进展
tunnels
foundation excavation
shields
simulation
monitoring
research progress
