RESEARCH ON PROTECTION TECHNOLOGY OF EXISTING SUBWAY STRUCTURE IN TUNNEL CONSTRUCTION WITH CLOSE DISTANCE MINING METHOD
The construction of underground tunnels with parallel proximity to existing subway tunnels has a significant impact,and ensuring the safety of parallel proximity to existing structures is a future development trend.Based on the construction of Zhongshan Eighth Station on Guangzhou Metro Line 11,this study numerically simulated the impact of parallel construction of underground tunnels on adjacent existing Line 5,and proposed a deep hole isolation grouting control operation track deformation construction technology,forming a tunnel full section grouting limited drainage protection existing line construction technology,and proposing a comprehensive treatment measure technology for existing line protection.
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