In the excavation of foundation pit and foundation bench in shallow aquifer area, the problem of dewatering will be involved.
在含水层较浅的地区开挖基坑及基槽，都涉及到降水问题。
The excavation of upper chamber was conducted by the methods of bench excavating in layers and common explosion.
上室开挖采用分层梯段开挖和普通爆破方法。
The excavation of upper chamber was conducted by the methods of bench excavating in layers and common explosion.
上室开挖采用分层梯段开挖和普通爆破方法。
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