管片接缝弹性密封垫防水性能评价方法研究

摘要
图/表
参考文献
相关文章 (5)

全文: PDF (592 KB) HTML (0 KB)
输出: BibTeX | EndNote (RIS)

摘要 研究目的:现有盾构隧道管片接缝密封垫防水性能主要采用平均接触压力和有效接触应力评定,未考虑密封垫接触面凹凸不平以及存在极细微渗漏孔洞的影响,造成数值模拟与试验结果有较大差异。为完善密封垫防水性能评价方法,建立量化评价指标,本文推导密封垫有效总泄漏率公式,并通过数值分析与防水试验,证明所提有效总泄漏率指标作为密封垫防水性能评价方法的合理性。
研究结论:(1)有效总泄漏率可以作为评价密封垫防水性能的一个量化指标;(2)由于密封垫接触面凹凸不平,存在极细微渗漏孔洞,密封垫设计时不仅要计算有效接触应力占比,还要计算有效总泄漏率;(3)当接触应力较大且有效接触应力占比较高时,防水能力由接触应力控制;当接触应力较小或有效接触应力占比较低时,防水能力由有效总泄漏率控制;(4)本研究成果可为密封垫设计提供理论指导。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	肖明清
	张超勇
	薛光桥
	虞雄兵

关键词 ：管片接缝防水, 密封垫, 防水性能, 评价方法

Abstract：Research purposes:At present, the waterproof performance of gaskets is mainly evaluated by the average contact pressure and effective contact stress, and the influence of uneven contact surface of sealing gasket and micro leakage hole is not considered, which results in great differences between numerical simulation and experimental results. In order to improve the evaluation method of sealing gasket waterproof performance, and establish quantitative evaluation indexes, the model of effective total leakage rate of gasket is established in this paper. Through numerical analysis and waterproof test, it is proved that the proposed effective total leakage rate index is reasonable as the evaluation method of sealing gasket waterproof performance.
Research conclusions:(1) The effective total leakage rate can be used as an important indicator for evaluating the waterproof performance of the gasket. (2) Due to the uneven contact surface of the gasket and the existence of micro leakage hole, the design of the gasket should not only calculate the proportion of effective contact stress, but also calculate the effective total leakage rate. (3) When the contact stress is large and the effective contact stress accounts for a high proportion, the waterproof ability is controlled by the contact stress; when the contact stress is small or the proportion of the effective contact stress is small, the waterproof ability is controlled by the leakage rate. (4) The research results can provide theoretical guidance for gasket design.

Key words： segment joint waterproof gasket waterproof performance evaluation method

收稿日期: 2022-07-11

PACS:

U451

作者简介: ^**肖明清,1970年出生,男,教授级高级工程师,全国工程勘察设计大师,现任中铁第四勘察设计院集团有限公司总工程师。

引用本文:

肖明清, 张超勇, 薛光桥, 虞雄兵. 管片接缝弹性密封垫防水性能评价方法研究[J]. 铁道工程学报, 2022, 39(10): 65-70.
XIAO Mingqing, ZHANG Chaoyong, XUE Guangqiao, YU Xiongbing. Research on the Evaluation Method of Waterproof Performance of Elastic Sealing Gasket for Segment Joint. Journal of Railway Engineering Society, 2022, 39(10): 65-70.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2022/V39/I10/65

[1]	肖明清, 谢宏明, 王士民, 等. 盾构隧道管片接缝防水体系演化历程与展望[J]. 隧道建设(中英文), 2021(11):1891-1902.Xiao Mingqing, Xie Hongming, Wang Shimin, etc. Evolution and Prospects of Shield Tunnel Joints and Segment Waterproofing Systems[J]. Tunnel Construction, 2021(11):1891-1902.
[2]	刘印,张冬梅,黄宏伟.基于纵向不均匀沉降的盾构隧道渗漏水机理分析[J].铁道工程学报, 2011(5):66-70.Liu Yin,Zhang Dongmei,Huang Hongwei. Analysis of Mechanism of Water Leakage Induced by Longitudinal Uneven Settlement of Shield Tunnel[J]. Journal of Railway Engineering Society, 2011(5):66-70.
[3]	孙廉威. 基于施加水压的盾构接缝防水机制数值分析[J]. 隧道建设(中英文),2018(4):603-610.Sun Lianwei. Numerical Analysis of Waterproof Mechanism of Shield Tunnel Joint Based on Applied Water Pressure[J]. Tunnel Construction, 2018(4):603-610.
[4]	张亚洲, 冯升明, 由广明, 等. 考虑水压作用过程的盾构隧道接缝防水机制研究[J]. 隧道建设(中英文), 2020(11):1594-1601.Zhang Yazhou, Feng Shengming, You Guangming, etc. Study on Waterproof Mechanism of Shield Tunnel Joints Considering Water Pressure Process[J]. Tunnel Construction, 2020(11):1594-1601.
[5]	雷震宇. 盾构隧道管片橡胶密封垫的优化设计方法[J]. 地下空间与工程报, 2010(4):770-774.Lei Zhenyu. An Optimal Design Approach for the Rubber Sealing Gasket in Shield Tunneling[J]. Chinese Joumal of Underground Space and Engineering, 2010(4):770-774.
[6]	肖明清, 薛光桥, 钟元,等. 盾构法隧道管片接缝双道密封垫防水实验研究[J]. 铁道工程学报, 2021(2):85-91.Xiao Mingqing, Xue Guangqiao, Zhong Yuan, etc. Experimental Research on the Waterproof of Double Gaskets in Segment Joint of Shield Tunnel[J]. Journal of Railway Engineering Society, 2021(2):85-91.
[7]	Ding Wenqi, Gong Chenjie, Mosalam K M, etc. Development and Application of the Integrated Sealant Test Apparatus for Sealing Gaskets in Tunnel Segmental Joints[J]. Tunnelling & Underground Space Technology, 2017(63):54-68.
[8]	赵明, 丁文其, 彭益成, 等. 高水压盾构隧道管片接缝防水可靠性试验研究[J]. 现代隧道技术, 2013(3):87-93.Zhao Ming, Ding Wenqi, Peng Yicheng, etc. Experimental Study on the Reliability of Shield Tunnel Segment Joints to Remain Watertight Under High Water Pressure[J]. Modern Tunnelling Technology,2013(3):87-93.
[9]	吴炜枫, 丁文其, 魏立新, 等. 深层排水盾构隧道接缝防水密封垫形式试验研究[J]. 现代隧道技术, 2016(6):190-195.Wu Weifeng,Ding Wenqi,Wei Lixin,etc. Experimental Study on Joint Waterproofing Gasket Patterns for Deep Sewage Tunnels Excavated by Shield Machines[J]. Modern Tunnelling Technology, 2016(6):190-195.
[10]	肖明清, 张超勇, 薛光桥, 等. 管片接缝密封垫接触面泄漏率的数值模拟研究[J].隧道建设,2021(10):1654-1661.Xiao Mingqing, Zhang Chaoyong, Xue Guangqiao, etc. Numerical Simulation on Leakage Rate of Contact Surface of Segment Joint Sealing Gaskets[J]. Tunnel Construction, 2021(10):1654-1661.