Interfacial behavior of permeable polymer and concrete at joints of cross-river shield tunnels

WANG Yuke; LI Zhenyu; ZHONG Yanhui; YU Xiang; ZHANG Bei; FENG Dakuo

doi:10.11779/CJGE2023S20027

Volume 45 Issue S2

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Chinese Journal of Geotechnical Engineering > 2023 > 45(S2): 195-200. > DOI: 10.11779/CJGE2023S20027

WANG Yuke, LI Zhenyu, ZHONG Yanhui, YU Xiang, ZHANG Bei, FENG Dakuo. Interfacial behavior of permeable polymer and concrete at joints of cross-river shield tunnels[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 195-200. DOI: 10.11779/CJGE2023S20027

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Interfacial behavior of permeable polymer and concrete at joints of cross-river shield tunnels

WANG Yuke^{1, 2, 3,},
LI Zhenyu^{1, 2, 3},
ZHONG Yanhui^{1, 2, 3},
YU Xiang^{1, 2, 3},
ZHANG Bei^{1, 2, 3},
FENG Dakuo⁴

1.
School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China
2.
National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology, Zhengzhou 450001, China
3.
Provincial and Ministerial Collaborative Innovation Center for Underground Engineering Disaster Prevention and Control, Zhengzhou 450001, China
4.
China Construction Seventh Engineering Division Corp., LTD., Zhengzhou 450001, China

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Received Date: November 29, 2023
Available Online: April 19, 2024

Graphical Abstract

Abstract

Abstract

Joint leakage is one of the main diseases of shield tunnels crossing rivers during operation. The bonding performance with joint concrete and commonly used grouting materials in shield tunnel engineering is poor. The effects of common materials used for leakage treatment are limited. The authors has developed a new type of permeable polymer based on the existing grouting materials. A series of tests are carried out to investigate the applicability of the new permeable polymer for joint leakage treatment of tunnels. A theoretical model for the interface between the permeable polymer and the concrete is established and validated. The main conclusions are as follows: the interfacial shear strength between the permeable polymer and the concrete segments is directly proportional to the interfacial roughness and normal stress, and inversely proportional to the degree of humid condition of tunnels. The degree of influences of various factors on the interfacial strength is normal pressure > interfacial roughness > interfacial humidity. The residual error of linear regression theoretical model for the shear strength of interface between the polymer and the segment concrete obeys the normal distribution. The shear strength of the interface between the permeable polymer and the concrete can reach up to 1.5 MPa. The permeable polymer meets the needs of leakage treatment in cross-river shield tunnels.
- cross-river shield tunnel,
- permeable polymer,
- monotonic direct shear test,
- shear strength,
- linear regression analysis

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References (21)

References

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