Building undergroundchannel indoor is an important component part of the north China architecture. But it has been ignored for a long time, as a result, there are a great many quality problems.
建筑室内地沟是北方建筑的一个重要组成部分，但长期以来一直不被人们所重视，导致其存在很多质量问题。
2
The ramming pipe drapery is used for support to construct the crossing structures of underground passage, blind channel and etc.
用夯管帷幕作为支护来建造地下通道、暗渠等穿越构造物，在城市建设中是一项新的施工工艺。
3
The plan to repair and reinforce the underground inclined channel of a uranium tailings dam and the application of PCC material in the project are introduced in detail.