孔壁坍塌
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collapse of hole wall
井壁坍塌
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
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