温州深厚软土地层盾构隧道建设的地质风险及控制研究
苏培森
Geological Risk Analysis and Control Study forGeological Risk Analysis and Control Study for Shield Tunnel Construction in Deepthick Soft Soil Stratum in Wenzhou
SU Peisen
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作者信息:中铁第四勘察设计院集团有限公司， 430063， 武汉
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Affiliation:China Railway Siyuan Survey and Design group Co., Ltd., 430063, Wuhan, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.12.035
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中图分类号/CLCN:U456
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栏目/Col:研究报告
摘要:
目的：温州地处东海之滨，根据温州市轨道交通既有勘察资料显示，约60%区间隧道洞身处于深厚淤泥及淤泥质软土地层中。而当前对深厚软土地层盾构隧道建设经验不足，需开展软土地层盾构隧道建设的地质风险分析并提出控制措施。方法：通过查阅和分析既有研究成果，探讨了软土地层盾构隧道建设的研究现状，在此基础上结合温州软土既有工程勘察实践，总结了其工程力学特性，借助有限元软件分析了隧道衬砌结构的受力特点，并基于软土盾构隧道病害的不利因素分析，进而提出风险控制措施。结果及结论：从温州深厚软土的工程力学特性和隧道衬砌结构受力特点出发，分析总结了深厚软土地层盾构隧道建设的地质风险，提出了以扰动控制为核心的相关控制措施，以供温州轨道交通及其他深厚软土地层盾构隧道建设。
Abstracts:
Objective: Located on the coast of the East China Sea, Wenzhou, based on existing survey data for Wenzhou rail transit, it is revealed that approximately 60% of the tunnel sections are situated in deep, thick muddy and silty soft soil layers. Given the limited experience in constructing shield tunnels in deepthick soft soil stratum, there is a need to conduct a geological risk analysis for tunnel construction in soft soil stratum and propose effective control measures. Method: By reviewing and analyzing existing research findings, the current research status of shield tunnel construction in soft soil stratum is explored. Building upon this foundation and combining it with practical engineering survey practices in the soft soil in Wenzhou, the engineering mechanical characteristics are summarized and the stress characteristics of tunnel lining structure is analyzed utilizing finite element software. Risk control measures are proposed based on the analysis of adverse factors leading to soft soil shield tunnel diseases. Result & Conclusion: Taking into account the engineering mechanical characteristics of deepthick soft soil in Wenzhou and the stress characteristics of tunnel lining structures, the geological risks associated with shield tunnel construction in deepthick soft soil layers are analyzed and summarized. Relevant control measures centered on disturbance control are proposed for the construction of Wenzhou rail transit and other shield tunnels in deepthick soft soil stratum.
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