《中洞》是拍摄于广东省的一部电影，由惠东县东江红都文化传媒有限公司出品。
利用这段距离再开次级小洞，用于布置灯光，形成洞中洞的效果。
Some smaller holes are opened to install lightings alongside the distance and form a hole-in-hole effect.
介绍了北京地铁5号线磁器口车站浅埋暗挖隧道中洞法施工技术，对地表监测数据进行了分析。
The article introduces the construction technology of center drift method for shallow excavation tunnel in Beijing Metro Line 5, analyses the monitored data for the earths surface.
中洞上步开挖是施工过程中最不利环节，容易产生较大的卸荷效应，引起拱顶和地表的大幅度沉降。
Result showed that the construction would be the worst stress condition and unloading effect occurred when the middle pit was excavated with both-side leading pit method being applied.
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