[1] Qin Gan, Cao Shengrong, Lai Xu, Yang Fan, et al. Effect of insufficient tunnel crown thicknesson the post-tensioned concrete lining of the Yellow RiverCrossing Tunnel and its strengthening schemes [J]. Journal of Southeast University (English Edition), 2018, 34 (3): 356-363. [doi:10.3969/j.issn.1003-7985.2018.03.011]

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Effect of insufficient tunnel crown thicknesson the post-tensioned concrete lining of the Yellow RiverCrossing Tunnel and its strengthening schemes()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

34

Issue:

2018 3

Page:

356-363

Research Field:

Other Disciplines

Publishing date:

2018-09-20

Info

Title:

Effect of insufficient tunnel crown thicknesson the post-tensioned concrete lining of the Yellow RiverCrossing Tunnel and its strengthening schemes

Author(s):

Qin Gan;  Cao Shengrong;  Lai Xu;  Yang Fan

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China

Keywords:

post-tensioned concrete linings;  tunnel crown thickness;  stress redistribution;  finite element analysis;  tunnel reinforcement;  Yellow River Crossing Tunnel

PACS:

TV332

DOI:

10.3969/j.issn.1003-7985.2018.03.011

Abstract:

The effect of deficiency in tunnel crown thickness on the Yellow River Crossing Tunnel with post-tensioned concrete inner lining was investigated by the elasto-plastic finite element method. Changes in the deformations and circumferential stresses of the post-tensioned concrete inner lining with the gradual decrease of the tunnel crown thickness were compared, and the potential bearing risk of insufficient tunnel crown thickness for the Yellow River Crossing Tunnel was revealed. Based on the finite element calculation results of circumferential stresses under different defective cases, the corresponding reinforcement schemes were proposed. The calculation results show that the inner lining can still maintain a satisfactory stress state when the tunnel crown thickness is equal to or greater than 0.28 m. When the tunnel crown thickness decreases below 0.28 m, the external surface of the crown and internal surface of the crown’s adjacent areas may be under tension. The tension stresses will incrementally increase and ultimately exceed the tensile strength of the inner lining concrete as the tunnel crown thickness further decreases gradually. Then, the Yellow River Crossing Tunnel cannot operate normally, and severe cracking, leaking or even failure may occur. When the tunnel crown thickness is equal to or greater than 0.28 m, the reinforcement suggestions are that the void spaces between the inner lining and the outer lining should be back-filled with concrete. When the tunnel crown thickness is less than 0.28 m, the inner lining should be reinforced by steel plates after concrete back-filling.

References:

[1] Simanjuntak T D Y F, Marence M, Mynett A E, et al. Pressure tunnels in non-uniform in situ stress conditions[J].Tunnelling and Underground Space Technology, 2014, 42: 227-236. DOI:10.1016/j.tust.2014.03.006.
[2] Grunicke U H, Risti M. Pre-stressed tunnel lining-pushing traditional concepts to new frontiers [J]. Geomechanics and Tunnelling, 2012, 5(5): 503-516. DOI:10.1002/geot.201200037.
[3] Nishikawa K. Development of a prestressed and precast concrete segmental lining[J].Tunnelling and Underground Space Technology, 2003, 18(2/3): 243-251. DOI:10.1016/s0886-7798(03)00033-6.
[4] Kang J F, Hu Y M. Techniques and performance of post-prestressed tunnel liner[J].Practice Periodical on Structural Design and Construction, 2005, 10(2): 102-108. DOI:10.1061/(asce)1084-0680(2005)10:2(102).
[5] Yuan Y, Bai Y, Liu J H. Assessment service state of tunnel structure[J].Tunnelling and Underground Space Technology, 2012, 27(1): 72-85. DOI:10.1016/j.tust.2011.07.002.
[6] Yang J S, Fu J Y. Investigation and rehabilitation of lining imperfections and cracks in an operating railway tunnel [C]//Proceedings of Shotcrete for Underground Support Ⅻ. Singapore, 2015: 1-10.
[7] Zhu C, Lei F, Dong J. Structure detection and evaluation of highway tunnels based on geological radar detection technology [C]// 10th Asia Pacific Transportation Development Conference. Beijing, China, 2014: 547-554.
[8] Bian K, Liu J, Xiao M, et al. Cause investigation and verification of lining cracking of bifurcation tunnel at Huizhou Pumped Storage Power Station[J].Tunnelling and Underground Space Technology, 2016, 54: 123-134. DOI:10.1016/j.tust.2015.10.030.
[9] Meguid M A, Dang H K. The effect of erosion voids on existing tunnel linings[J].Tunnelling and Underground Space Technology, 2009, 24(3): 278-286. DOI:10.1016/j.tust.2008.09.002.
[10] Wang J F, Huang H W, Xie X Y, et al. Void-induced liner deformation and stress redistribution[J].Tunnelling and Underground Space Technology, 2014, 40: 263-276. DOI:10.1016/j.tust.2013.10.008.
[11] Barpi F, Peila D. Influence of the tunnel shape on shotcrete lining stresses[J].Computer-Aided Civil and Infrastructure Engineering, 2012, 27(4): 260-275. DOI:10.1111/j.1467-8667.2011.00728.x.
[12] Son M, Cording E J. Ground-liner interaction in rock tunneling[J]. Tunnelling and Underground Space Technology, 2007, 22(1): 1-9. DOI:10.1016/j.tust.2006.03.002.
[13] Yin J, Cao S R, Qin G, et al. Load compensation research on twice-tension for loop anchor cable of inner lining in Yellow River-crossing tunnel [J]. Engineering Sciences, 2014, 12: 77-86.
[14] Wang Z, Wang L Z, Li L L, et al. Failure mechanism of tunnel lining joints and bolts with uneven longitudinal ground settlement[J].Tunnelling and Underground Space Technology, 2014, 40: 300-308. DOI:10.1016/j.tust.2013.10.007.
[15] Liyanapathirana D S, Nishanthan R. Influence of deep excavation induced ground movements on adjacent piles[J].Tunnelling and Underground Space Technology, 2016, 52: 168-181. DOI:10.1016/j.tust.2015.11.019.
[16] Collins M P, Mitchell D. Prestressed concrete structures [M]. New Jersey: Prentice Hall Englewood Cliffs, 1991: 46-56.
[17] Ministry of Housing and Urban-Rural Development of the People’s Republic of China. GB 50010—2010 Code for design of concrete structure [S]. Beijing: China Building Industry Press, 2010.(in Chinese)
[18] Mashimo H, Ishimura T. Evaluation of the load on shield tunnel lining in gravel [J]. Tunnelling and Underground Space Technology, 2003, 18: 233-241.

Memo

Memo:

Biographies: Qin Gan(1989—), male, Ph.D. candidate; Cao Sheng-rong(corresponding author), male, doctor, associate professor, shrcao@whu.edu.cn.
Foundation items: The Natural Science Foundation of Hubei Province(No.2017CFB667), the National Natural Science Foundation of China(No. 51079107).
Citation: Qin Gan, Cao Shengrong, Lai Xu, et al. Effect of insufficient tunnel crown thickness on the post-tensioned concrete lining of the Yellow River Crossing Tunnel and its strengthening schemes[J].Journal of Southeast University(English Edition), 2018, 34(3):356-363.DOI:10.3969/j.issn.1003-7985.2018.03.011.

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