隧道为单洞四车道，采用分层台阶法进行开挖，在大跨度隧道施工中是一种新尝试。
The tunnel consists of a single tube with four lanes, and was excavated with the layer-step method, which is a new attempt in constructing the tunnel with large across span.
隧道为单洞四车道，采用分层台阶法进行开挖，在大跨度隧道施工中是一种新尝试。
The tunnel consists of a single tube with four lanes, and was excavated with the layer-step method, which is a new attempt in constructing the tunnel with large across span.
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