输水盾构隧洞预应力双层衬砌结构力学响应
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关键词：预应力双层衬砌；承载力学特性；有限元分析；输水盾构隧洞中图分类号： U451+.4 文献标志码：A doi：10．3969 ／ j．issn．1000－1379．2025．06．022引用格式：畅，马晓斌，王士民，等．输水盾构隧洞预应力双层衬砌结构力学响应［J］．人民黄河，2025，47（6）：144－149．
Mechanical Re⁃Sponse of Prestressed Double⁃Layer Lining Structure of Water Conveyance Shield Tunnel
LIU Chang1， MA Xiaobin1， WANG Shimin1， MENG Fansheng2， CHEN Yuchi2（1．Key Laboratory of Transportation Tunnel Engineering of the Ministry of Education，
Southwest Jiaotong University， Chengdu 610031， China； 2．Chengdu Hydroelectricity ConstructionEngineering Co．， Ltd．， Sinohydro Bureau No．7 Company， Chengdu ， China）
Abstract： In order to explore the mechanical response of prestressed double⁃layer lining structure during the construction and operation of water conveyance shield tunnel， taking the Pearl River Delta Water Resources Allocation Project as an example， a three⁃dimensional calcula⁃ tion model of double⁃layer lining structure was established by finite element numerical simulation method， and the bearing capacity character⁃ istics of double⁃layer lining structure with or without prestress were analyzed． The results show that when the internal water pressure does not exceed 0.9MPa ， the ordinary double⁃layer lining structure can meet the safety requirements and does not need to apply prestress． When the internal water pressure is too large， it is necessary to apply prestress to the double⁃layer lining structure to give full play to its bearing capaci⁃ ty． Compared with the pre⁃stressed tension stage， the coordinated bearing capacity of the segment lining and the pre⁃stressed lining is stronger and the contact pressure is more fully transmitted in the water⁃filled operation stage． During the whole construction and operation stages， the displacement variation of the double⁃layer lining structure is small， and it has a good working state．
Key words： prestressed double⁃layer lining； characteristics of bearing capacity； finite element analysis； water conveyance shield tunnel
0 引言
考虑到输水盾构隧洞施工过程中常面临地质条件复杂、地层自稳定性差、结构渗漏水等问题，设计时一般采用双层衬砌结构承担内外荷载。（剩余8996字）
