Pipe roof support is an assisted method of shallow tunneling.
管棚支护是浅埋暗挖法施工中的一种辅助工法。
The paper discussed common problems of pipe roof support engineering in soft ground and presented the optimization technology by tests on borehole construction methods with existing equipments.
在软弱土层管棚支护工程中，利用现有设备试验了多种成孔方法，优选出最佳成孔法，加快了工程进度。
The paper discussed common problems of pipe roof support engineering in soft ground and presented the optimization technology by tests on borehole construction methods with existing equipments.
在软弱土层管棚支护工程中，利用现有设备试验了多种成孔方法，优选出最佳成孔法，加快了工程进度。
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