The impervious wall of this project is located in water bearing sand and gravel, the collapse hole takes place due to some factor affect, the deep well lower water level measures are adopted.
本工程防渗墙在富含水砂卵砾石地层施工中，由于各种因素引起严重塌孔，施工中采用了深井井上降水措施。
The concrete impervious wall for the second phase cofferdam in the Three Gorges Project is the key to the cofferdam.
三峡工程二期围堰混凝土防渗墙是围堰工程成败的关键。
The concrete impervious wall for the second phase cofferdam in the Three Gorges Project is the key to the cofferdam.
三峡工程二期围堰混凝土防渗墙是围堰工程成败的关键。
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