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Study on corrosion characteristic of semi-ring steel plate for strengthening shield tunnel under DC stray current
https://orcid.org/0000-0002-3075-4415
Highlights The calculation model of semi-ring steel plate corrosion was established. The shield tunnel and track bed structures were contained in the calculation model. The input voltage of DC current at bottom of rail fastener was obtained by field test. Effect of DC stray current on the corrosion of semi-ring steel plate was studied.
Abstract Steel plate reinforcement method is widely used for strengthening shield tunnel, the types of steel plate include semi-ring and full-ring, during metro operation the steel plate will be corrosion rapidly under the effect of DC (Direct Current) stray current, but the corrosion mechanism of steel plate is still unclear. In this paper, the corrosion calculation model of semi-ring steel plate for strengthening shield tunnel under DC current is established, based on direct current and electrochemical corrosion theory, the coupling calculation of electric field and chemical field is realized in the model. The input voltage of DC current at the bottom of rail fastener is obtained by field test. Through calculation, the corrosion characteristic of semi-ring steel plate is investigated under different DC current input modes and output types. The result shows that the maximum corrosion rate of steel plate under bilateral current output type is greater than unilateral current output type, and the corrosion area of steel plate under bilateral output type is little affected by the DC current input mode. The aim of this paper is to explain the corrosion characteristic of steel plate under DC stray current, and provide a theoretical basis for the durability study of shield tunnel structural reinforcement materials.
Study on corrosion characteristic of semi-ring steel plate for strengthening shield tunnel under DC stray current
https://orcid.org/0000-0002-3075-4415
Highlights The calculation model of semi-ring steel plate corrosion was established. The shield tunnel and track bed structures were contained in the calculation model. The input voltage of DC current at bottom of rail fastener was obtained by field test. Effect of DC stray current on the corrosion of semi-ring steel plate was studied.
Abstract Steel plate reinforcement method is widely used for strengthening shield tunnel, the types of steel plate include semi-ring and full-ring, during metro operation the steel plate will be corrosion rapidly under the effect of DC (Direct Current) stray current, but the corrosion mechanism of steel plate is still unclear. In this paper, the corrosion calculation model of semi-ring steel plate for strengthening shield tunnel under DC current is established, based on direct current and electrochemical corrosion theory, the coupling calculation of electric field and chemical field is realized in the model. The input voltage of DC current at the bottom of rail fastener is obtained by field test. Through calculation, the corrosion characteristic of semi-ring steel plate is investigated under different DC current input modes and output types. The result shows that the maximum corrosion rate of steel plate under bilateral current output type is greater than unilateral current output type, and the corrosion area of steel plate under bilateral output type is little affected by the DC current input mode. The aim of this paper is to explain the corrosion characteristic of steel plate under DC stray current, and provide a theoretical basis for the durability study of shield tunnel structural reinforcement materials.
Study on corrosion characteristic of semi-ring steel plate for strengthening shield tunnel under DC stray current
https://orcid.org/0000-0002-3075-4415
Highlights The calculation model of semi-ring steel plate corrosion was established. The shield tunnel and track bed structures were contained in the calculation model. The input voltage of DC current at bottom of rail fastener was obtained by field test. Effect of DC stray current on the corrosion of semi-ring steel plate was studied.
Abstract Steel plate reinforcement method is widely used for strengthening shield tunnel, the types of steel plate include semi-ring and full-ring, during metro operation the steel plate will be corrosion rapidly under the effect of DC (Direct Current) stray current, but the corrosion mechanism of steel plate is still unclear. In this paper, the corrosion calculation model of semi-ring steel plate for strengthening shield tunnel under DC current is established, based on direct current and electrochemical corrosion theory, the coupling calculation of electric field and chemical field is realized in the model. The input voltage of DC current at the bottom of rail fastener is obtained by field test. Through calculation, the corrosion characteristic of semi-ring steel plate is investigated under different DC current input modes and output types. The result shows that the maximum corrosion rate of steel plate under bilateral current output type is greater than unilateral current output type, and the corrosion area of steel plate under bilateral output type is little affected by the DC current input mode. The aim of this paper is to explain the corrosion characteristic of steel plate under DC stray current, and provide a theoretical basis for the durability study of shield tunnel structural reinforcement materials.
Study on corrosion characteristic of semi-ring steel plate for strengthening shield tunnel under DC stray current
Yu, Shuo (author) / Jin, Hao (author) / Cao, Miaofeng (author)
2022-07-28
Article (Journal)
Electronic Resource
English
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