2017, Volume 19, Issue 6
Strategic Study of CAE >> 2017, Volume 19, Issue 6 doi: 10.15302/J-SSCAE-2017.06.008
Safety Guarantee Measures for Subsea Shield Tunnel Segments Based on Life Cycle Deterioration Analysis
Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
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Abstract
The segment joint is the weak link in the lining structure of subsea tunnels, as it is under the continuous coupled effect of high water pressure and the corrosive seawater environment. If its performance deteriorates, it will seriously affect the safety of the lining structure of entire subsea shield tunnels. Based on an analysis of existing research into segment joint erosion and deterioration, a tunnel service time factor is introduced. Considering the influence of seawater pressure infiltration and chloride ion erosion and migration, a model analyzing the erosion and deterioration of the segment joint over its whole life cycle was subsequently established. The law governing the progressive erosion and deterioration of the segment joints of subsea tunnels over the entire life cycle was analyzed. The effects of seawater pressure and ion concentration on the erosion, deterioration, and steel corrosion of segment joints were studied. Based on the analysis of erosion and deterioration over the entire life cycle, economic and rational measures to ensure the long-term safety of the segment lining structure of subsea shield tunnels were proposed.
Keywords
shield tunnel ; safety guarantee ; deterioration analysis ; ion erosion ; segment joint
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References
[ 1 ] Siemes T, Polder R, Vries H D. Design of concrete structures for durability Example: Chloride penetration in the lining of a bored tunnel [J]. Heron, 1998, 43(4): 227–224. link1
[ 2 ] Jin W L, Yuan Y S, Wei J, et al. Theory and design method of concrete structure durability in chloride environment [M]. Beijing: China Science Publishing & Media Ltd., 2011. Chinese.
[ 3 ] Banger F, Grasberger S, Kuhl D, et al. Environmentally induced deterioration of concrete: Physical motivation and numerical modeling [J]. Engineering Fracture Mechanics, 2003, 70(7–8): 891–910. link1
[ 4 ] Richard B, Raguenean F, Cremona C, et al. A three-dimensional steel/concrete interface model including corrosion effects [J]. En-gineering Fracture Mechanics, 2010, 77(6): 951–973. link1
[ 5 ] Yu Y S, Yuan Y S, Geng O, et al. Corrosion characteristics and mechanism analysis of concrete reinforced by chloride [J]. Jour-nal of China University of Mining and Technology, 2009, 38(3): 309–315. Chinese.
[ 6 ] Gong T Q. Durability and corrosion protection study of shield tun-nel in Tokyo Bay [J]. Translated by Guo S T. Tunnel on, 1994 (10): 20–28. Chinese.
[ 7 ] Yang L D, Wu Z Z, Shi B L, et al. Chloride migration in concrete tunnel segment of the shield cracks and joint leakage condition [J]. Chinese Journal of Geotechnical Engineering, 2008, 30(12): 1826–1831. Chinese.
[ 8 ] Wang Y D. Study on life prediction model of subsea tunnel based on chloride erosion [J]. Sturctural Engineers, 2012, 28(8): 57–62. Chinese.
[ 9 ] Liu B D, Li P F, Li L, et al. Experiment on the effect of water content on strength of concrete [J]. Journal of Beijing Jiaotong University, 2011, 35(1): 9–12. Chinese.
[10] Dai Z C. Concrete impermeability and impermeability require-ments [J]. Eady-Mixed Concrete, 2010 (1): 18–22. Chinese.
[11] Song G D, Zhao S C, Fu Z, et al. Study on the critical concentra-tion of chloride ion and its progress [J]. Journal of Highway and Transportation Research and Development: Application Technolo-gy Edition, 2009(7): 128–132. Chinese.
[12] Kawano Kezai, Ichikawa Makian, Liang C K, et al. The critical concentration and regulation of chloride ions in the corrosion of steel in concrete [J]. China Concrete, 2011(10): 34–39. Chinese.
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