地铁隧道过海段复合衬砌参数的敏感性分析
麻凤海1韩晓菲1高冠一2董博1
Sensitivity Analysis of Metro Tunnel Subsea Section Composite Lining Parameters
MA FenghaiHAN XiaofeiGAO GuanyiDONG Bo
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作者信息:1.大连大学建筑工程学院， 116622， 大连；
2.西安建筑科技大学土木工程学院， 710055， 西安
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Affiliation:School of Architecture and Engineering, Dalian University, 116622, Dalian, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.03.001
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中图分类号/CLCN:U451+.4
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栏目/Col:学术专论
摘要:
以青岛地铁1号线胶州湾过海隧道为研究背景，选取了影响复合式衬砌外围水压力的9个主要影响因素，在利用Midas有限元数值分析软件的基础上，采用正交试验设计法分析了2种测试水平下这9个因素对水压力折减系数的显著性影响水平。结果表明：影响二次衬砌外围水压力大小的显著性因素为二次衬砌外围半径和围岩渗透系数与二次衬砌渗透系数的比值；影响初期支护外围水压力大小的显著性因素为围岩渗透系数与注浆圈渗透系数的比值、注浆圈厚度、围岩渗透系数与二次衬砌渗透系数的比值及隧道半径。其中，围岩渗透系数与二次衬砌渗透系数的比值对二次衬砌、初期支护的外围水压力均有显著性影响。因此，在海底隧道设计和施工过程中，应重点关注衬砌的渗透性能，注意支护结构的参数设计和选取，以保障海底隧道的顺利开挖及运营安全
Abstracts:
Taking the Jiaozhou Bay Subsea Tunnel of Qing-dao Metro Line 1 as the research background, nine main influen-cing factors affecting the water pressure at the composite lining periphery are selected, and on the basis of using Midas finite element numerical analysis software, the significant influence levels of these nine factors on the water pressure reduction coefficient under two test levels are analyzed by using orthogonal test design method. The results show that: the significant factors affecting the water pressure magnitude at the secondary lining periphery are the radius of the secondary lining periphery，the ratio of surrounding rock permeability coefficient to the secondary lining permeability coefficient. The significant factors affecting water pressure at the initial support periphery is the ratio of surrounding rock permeability coefficient to grouting circle permeability coefficient, the grouting circle thickness, the ratio of surrounding rock permeability coefficient to secondary lining permeability coefficient and the tunnel radius, among which the ratio of surrounding rock permeability coefficient to secondary lining permeability coefficient has a significant effect on the water pressure at the peripheries of secondary lining and initial support. Therefore, during the design and construction of subsea tunnels, attention should be paid to the lining permeability performance，the design and selection of the support structure parameters to ensure the smooth excavation and operation safety of the subsea tunnel.
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国际标准刊号: 1007-869X
国内统一刊号: 31-1749/U
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