某连拱隧道在中导洞施工时出现坍方。
During construction of the middle drift of a multi-arch tunnel, collapse accident occurred.
在连拱隧道施工中，中隔墙扮演着至关重要的角色。
During the construction of double-arched tunnel, the role of center pillar is of great importance.
桥全长266.5米，宽7.5米，桥身共11孔，是一座连拱大石桥。
This 1 i-arch stone bridge is 266.5 metres long and 7.5 metres wide.
桥全长266.5米，宽7.5米，桥身共11孔，是一座连拱大石桥。
This 1 i-arch stone bridge is 266.5 metres long and 7.5 metres wide.
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