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“单导洞施工法”开挖次数少,工序相对简单,工作面大,效率高,并能提高防水层的整体性。这些优点在骨塘连体隧道施工中得到了验证。
“Single-lead-hole construction method” less excavation, the process is relatively simple, large working surface, high efficiency, and can improve the integrity of the waterproof layer. These advantages have been verified in the construction of Tongtang Siamese tunnels.