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Review of the Research on Lining Damage and Repair Measures for Tunnels in Operation
(1. School of Science of Xi′an University of Architecture and Technology, Xi′an 710055; 2. School of Civil Engineering of Xi′an University of Architecture and Technology, Xi′an 710055)
Abstract Lining damage is one of the common and severe defects during the operation of tunnels and has an impact on the bearing capacity and stability of tunnel structure and the normal movement of pedestrians and vehicles to some extent. On this basis, the cause of lining damage, classification of cracks, and detection method and evaluation criteria for cracks were systematically investigated, researched and summarized in detail, the existing methods used for removal and repair of damaged linings were objectively evaluated, and the future research and development trend was discussed. The overview results showed that the lining damage accounted for 82% of the tunnel defects, and there were multiple causes of lining damage, including objective factors (e.g. complex geological conditions) and subjective factors in terms of construction and design. The lining damage was the result of several factors, rather than a single factor. The lining damage mechanism and classification method were further summarized, and according to a different stress mechanism and the crack characteristics, cracks could be divided into circumferential, longitudinal and diagonal cracks. The advantages and disadvantages of different methods for detecting damaged linings as well as the judgment criteria for cracks were sorted out to select an appropriate detection method for different situations.Based on the location and width of cracks, crack treatment measures for different situations were summarized, the experience in the prevention of relevant diseases was provided for the construction of tunnels, and the economic loss arising out of the repair and treatment of linings was reduced.
Abstract：
Lining damage is one of the common and severe defects during the operation of tunnels and has an impact on the bearing capacity and stability of tunnel structure and the normal movement of pedestrians and vehicles to some extent. On this basis, the cause of lining damage, classification of cracks, and detection method and evaluation criteria for cracks were systematically investigated, researched and summarized in detail, the existing methods used for removal and repair of damaged linings were objectively evaluated, and the future research and development trend was discussed. The overview results showed that the lining damage accounted for 82% of the tunnel defects, and there were multiple causes of lining damage, including objective factors (e.g. complex geological conditions) and subjective factors in terms of construction and design. The lining damage was the result of several factors, rather than a single factor. The lining damage mechanism and classification method were further summarized, and according to a different stress mechanism and the crack characteristics, cracks could be divided into circumferential, longitudinal and diagonal cracks. The advantages and disadvantages of different methods for detecting damaged linings as well as the judgment criteria for cracks were sorted out to select an appropriate detection method for different situations.Based on the location and width of cracks, crack treatment measures for different situations were summarized, the experience in the prevention of relevant diseases was provided for the construction of tunnels, and the economic loss arising out of the repair and treatment of linings was reduced.
SHAO Zhushan1,
2 XI Huihui2 QIAO Rujia1 ZHOU Hang2 GUO Yinbo1
.Review of the Research on Lining Damage and Repair Measures for Tunnels in Operation[J] MODERN TUNNELLING TECHNOLOGY, 2022,V59(4): 29-39
2022, Vol. 59 