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Integrated Detection And Restoration Program Of Water Gushing Induced Cracks In Shield Segments For Xi'an Metro In China

Submitted2017-03-06
Last Update2017-03-06
TitleIntegrated Detection And Restoration Program Of Water Gushing Induced Cracks In Shield Segments For Xi'an Metro In China
Author(s)Author #1
Author title:
Name: J.L. Qiu
Org: Shaanxi Provincial Major Laboratory for Highways, Bridges and Tunnels, Chang'an University, Xi�an 710064, China
Country:
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Author #2
Author title:
Name: J.X. Lai
Org: School of Highways, Chang�an University, Xi�an 710064, China
Country:
Email: 373159626@qq.com

Author #3
Author title:
Name: H.B. Fan
Org: School of Highways, Chang�an University, Xi�an 710064, China
Country:
Email:

Author #4
Author title:
Name: C. Liu
Org: School of Highways, Chang�an University, Xi�an 710064, China
Country:
Email:

Other Author(s)
Contact AuthorAuthor #2
Alt Email: 373159626@qq.com
Telephone:
KeywordsXi'an metro, Segment, Monitoring, BICS, Shield tunnel, Crack
AbstractVarious forms of damage, such as cracks, breakages and dislocations of shield tunnel segments, exert negative effects on the structure stress during the operation of a tunnel. Based on the water gushing accident that occurred in a section of a shield tunnel between North Street Station and Wulukou Station of a Xi�an subway, the segment damage caused by water gushing and the sources of damage were analyzed through field investigation, ground penetrating radar (GPR) detection, ultrasonic crack detection and displacement monitoring. Two treatment schemes are proposed on that basis: the balloon injection for concrete structures (BICS) method was used in the treatment of segment cracks, while reinforcing steel mesh and high-performance polymer mortar were used to treat the dislocation. The evaluation indicates that the treatment plans have met the expectations. Thus, the treatments used for other similar engineering damages can be improved by the results of this study.
Paperview paper 3859.pdf (595KB)

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