Abstract Composite Lining was used in the deep buried section of the Lanzhou-Chongqing Railway with surrounding rock of grade IV. The Primary design of the secondary lining was a reinforced concrete structure. After an analog comparison of design parameters and mechanical analysis, cancelation of the reinforcement of the secondary lining was determined to be acceptable. The secondary lining was changed to C35 plain concrete in the construction plans. The implementation of the Lanzhou-Chongqing railway proved that the primary support and surrounding rock deformation were within a permissible range and the safety of the lining structure met the relative requirements for the condition of no reinforcement.
Abstract：
Composite Lining was used in the deep buried section of the Lanzhou-Chongqing Railway with surrounding rock of grade IV. The Primary design of the secondary lining was a reinforced concrete structure. After an analog comparison of design parameters and mechanical analysis, cancelation of the reinforcement of the secondary lining was determined to be acceptable. The secondary lining was changed to C35 plain concrete in the construction plans. The implementation of the Lanzhou-Chongqing railway proved that the primary support and surrounding rock deformation were within a permissible range and the safety of the lining structure met the relative requirements for the condition of no reinforcement.
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Cite this article:
.Demonstration of a Plain Concrete Secondary Lining for a Double-Track Railway Tunnel Section in Deep-Buried Surrounding Rock of Grade IV[J] MODERN TUNNELLING TECHNOLOGY, 2012,V49(4): 76-82
2012, Vol. 49 