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。
The ramming pipe drapery is used for support to construct the crossing structures of underground passage, blind channel and etc.
结合工程实际情况，介绍在有地下水地区的暗渠施工降水案设计、涌水量计算、水泵选择。
An introduction is given to dewatering design, calculation of gushing water volume, and selection of pump for the construction of underdrain.
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