Open Access

ARTICLE

Characteristics on Seawater Corrosion of Intensely Weathered Surrounding Rock of Subsea Tunnel

by Peishuai Chen, Junjie Cao, Weizhong Chen, Weisheng Rao

1 School of Highway, Chang’an University, Xi’an, 710064, China
2 CCCC Second Harbour Engineering Co., Ltd., National Enterprise Technology Center, Wuhan, 430040, China
3 State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China
4 Taicang Construction Safety Supervision Station, Suzhou, 215400, China

* Corresponding Author: Peishuai Chen. Email:

Structural Durability & Health Monitoring 2020, 14(2), 147-163. https://doi.org/10.32604/sdhm.2020.07619

Received 13 June 2019; Accepted 18 December 2019; Issue published 23 June 2020

Abstract

Existing studies on the durability of subsea tunnel mainly focus on the concrete deterioration and steel corrosion, while there are few on the influence of mechanical properties deterioration of surrounding rock on the durability of subsea tunnel. To improve the accuracy of long-term stability prediction, seawater corrosion tests of intensely weathered surrounding rock of subsea tunnel are carried out. In this study, the strength characteristics of remolded samples of intensely weathered granite under different seawater concentrations are investigated, the strength attenuation equation under seawater corrosion is established, and the chemical damage evolution equation and model parameters are formulated, The findings provides the basis for analyzing the influence of corrosion and weakening of surrounding rock on the durability of tunnel within the operation period.

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