运营隧道防水板切割二衬的危害及整治方案研究
史云飞1龚兴旺2郁振其3龚伦2刘泽霖4崔笑醍4,5
Hazards of Waterproof Board Cutting Secondary Lining in Operating Tunnel and Remediation Schemes
SHI Yunfei1GONG Xingwang2YU Zhenqi3GONG Lun2LIU Zelin4CUI Xiaoti4,5
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作者信息:1.山西工程科技职业大学，030619，晋中
2.西南交通大学土木工程学院，610031，成都
3.国家管网集团建设项目管理分公司，065000，廊坊
4.南宁市人工智能学会，530000，南宁
5.中国传媒大学，100024，北京
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Affiliation:1.Shanxi Vocational University of Engineering Science and Technology , 030619, Jinzhong, China
2.School of Civil Engineering, Southwest Jiaotong University, 610031, Chengdu, China
3.National Pipeline Network Group Construction Project Management Branch, 065000, Langfang, China
4.Nanning Association for Artificial Intelligence, 530000, Nanning, China
5.Communication University of China,100024, Beijing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.10.018
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中图分类号/CLCN:U537.2
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栏目/Col:研究报告
摘要:
［目的］随着我国隧道建设步伐的加快，运营隧道中各类病害问题日益突显。尽管众多学者已对多种病害进行了深入研究，但针对防水板切割二衬的危害研究仍显不足。因此，有必要深入探究运营隧道中防水板切割二衬危害，并提出有效的整治方案。［方法］基于防水板的防水与受力作用机理，运用数值模拟技术，系统研究了运营隧道中防水板切割二衬的危害。重点分析了环向与纵向不同切割长度下，防水板拱部弯矩、衬砌Mises应力及位移等三项关键指标的变化规律。在此基础上，提出了一种新型整治设计方案，并通过对比防水板整治前后衬砌结构拱顶位移的变化，验证了该整治设计方案的合理性与优越性。［结果及结论］研究结果表明，随着防水板环向与纵向切割长度的增加，防水板拱部弯矩、衬砌应力及位移均呈现显著增长趋势。特别是防水板的纵向切割长度，对衬砌位移等三项指标的影响更为显著。通过综合分析弯矩、应力及位移的突变区域，发现防水板环向与纵向切割长度在2~3m范围内时，对衬砌结构的受力及变形影响最为不利。
Abstracts:
［Objective］ With the acceleration of tunnel construction in China, various diseases in operating tunnels become increasingly prominent. Despite of many in-depth researches by scholars on various diseases, that on the hazards of waterproof board cutting secondary lining is still insufficient. Therefore, it is necessary to deeply explore the secondary lining cutting hazard in operating tunnels and propose effective remediation schemes. ［Method］ Based on the waterproofing and force mechanism of waterproof boards, numerical simulation technology is used to systematically study the secondary lining cutting hazard in operating tunnels. Focusing on the waterproof board arch bending moment, the Mises stress and the lining displacement under different circumferential and longitudinal cutting lengths, the changing law of their key indicators are emphatically analyzed. On this basis, a new remediation design scheme is proposed, and the rationality-superiority of the remediation design scheme is verified by comparing the changes in the lining structure vault displacement before and after the waterproof board remediation. ［Result & Conclusion］ With the increase in the circumferential and longitudinal cutting lengths of the waterproof board, the arch bending moment, the lining stress and displacement all show a significant growth trend. In particular, the longitudinal cutting length of the waterproof board has a more significant impact on the three indicators such as lining displacement. Through comprehensively analyzing the sudden change areas of bending moment, stress and displacement, it is found that when the waterproof board circumferential and longitudinal cutting lengths are in the range of 2~3 m, the impact on stress and deformation of the lining structure is most unfavorable.
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