管片接缝弹性密封垫防水性能评价方法研究

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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

Received: 11 July 2022

PACS:

U451

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	Articles by authors
	XIAO Mingqing
	ZHANG Chaoyong
	XUE Guangqiao
	YU Xiongbing

Cite this article:

XIAO Mingqing,ZHANG Chaoyong,XUE Guangqiao, et al. Research on the Evaluation Method of Waterproof Performance of Elastic Sealing Gasket for Segment Joint[J]. Journal of Railway Engineering Society, 2022, 39(10): 65-70.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I10/65

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