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Research on the Waterproof Performance of Segment Rubber Gasket Considering the Groove Boundary and Paste Quality
(1. CCCC Second Harbour Engineering Company Ltd., Wuhan 430040; 2. Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure, Wuhan 430040; 3. Key Laboratory of Large-Span Bridge Construction Technology, Wuhan 430040；4. China Road and Bridge Engineering Co., Ltd., Beijing 100011)
Abstract Aiming at the structure of the bottom flat and comb-shaped rubber gaskets, finite element software was used to establish a three-dimensional calculation model, to carry out research on the impact of gasket grooves and paste quality on the waterproof performance of gaskets, to explore the weak points of gaskets in waterproofing, and to carry out physical modeling test for verification. The research results show that: (1) During the compression process of the rubber gasket, it is easy to deform into the gap between the segments on both sides, which reduces the actual area in the groove and reduces the waterproof ability of the gasket. (2) When the bottom comb-shaped gasket is pasted and fixed, the contact surface between the gaskets is the weak point of waterproofing of the joint; when it is not pasted, the contact stress between the gaskets is reduced by 25.8% compared with that of pasting and fixing, and the weakest waterproof point is the contact surface between the bottom of the gasket and the groove. (3) When the flat gasket is not pasted, the structure in the compression process is relatively stable, and the quality of the pasting has little effect on the waterproof of the gasket.
Abstract：
Aiming at the structure of the bottom flat and comb-shaped rubber gaskets, finite element software was used to establish a three-dimensional calculation model, to carry out research on the impact of gasket grooves and paste quality on the waterproof performance of gaskets, to explore the weak points of gaskets in waterproofing, and to carry out physical modeling test for verification. The research results show that: (1) During the compression process of the rubber gasket, it is easy to deform into the gap between the segments on both sides, which reduces the actual area in the groove and reduces the waterproof ability of the gasket. (2) When the bottom comb-shaped gasket is pasted and fixed, the contact surface between the gaskets is the weak point of waterproofing of the joint; when it is not pasted, the contact stress between the gaskets is reduced by 25.8% compared with that of pasting and fixing, and the weakest waterproof point is the contact surface between the bottom of the gasket and the groove. (3) When the flat gasket is not pasted, the structure in the compression process is relatively stable, and the quality of the pasting has little effect on the waterproof of the gasket.
HE Chuangbo1,
2,
3 XU Chao 1 etc
.Research on the Waterproof Performance of Segment Rubber Gasket Considering the Groove Boundary and Paste Quality[J] MODERN TUNNELLING TECHNOLOGY, 2022,V59(5): 195-201
2022, Vol. 59 