RESEARCH ARTICLE
Test on Durability of Shield Tunnel Concrete Segment under Coupling Multi-Factors
Qiang Li, Hongfa Yu*, 1, 2, Haiyan Ma1, Shudong Chen2, Shuguang Liu1
Article Information
Identifiers and Pagination:
Year: 2014Volume: 8
First Page: 451
Last Page: 457
Publisher ID: TOCIEJ-8-451
DOI: 10.2174/1874149501408010451
Article History:
Received Date: 9/7/2014Revision Received Date: 18/9/2014
Acceptance Date: 28/12/2014
Electronic publication date: 31/12/2014
Collection year: 2014
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
To study the durability of shield tunnel concrete segment under coupling multi-factors, the durability and degradation law of reinforced concrete segments under the joint action of carbonation, sulfate, chloride salt and stray current was studied by accelerated environmental and direct current (DC) power simulation test. The results show that the presence of the stray current not only accelerates the migration of chloride ions to the concrete, but also makes chlorine ion gradually converge to the steel surface. The steel corrosion near the corrosion solution on the up surface of segment is more serious than the steel corrosion near the carbon dioxide on the lower surface. The interaction of chlorine ions and stray current primarily controls the durability of the segment.