求翻译：根据地勘报告建议, ②层粉质粘土遇水或长时间暴露于空气中其强度会迅速降低，基础施工时一定要做到边开挖边及 时浇筑砼垫层。是什么意思？

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The report suggests that objective 2 base layer clay powder quality or prolonged exposure to water in the air will rapidly reduce its intensity, and construction of basis to make sure when digging at side and pouring concrete lining.

The base compares the report suggestion, ②The level silty clay meets Shui Huochang the time to expose in the air its intensity can reduce rapidly, when foundation construction certainly must achieve on the one hand excavates on the other hand the prompt construction tong breaker strip.

According to geological exploration report recommendations, ② layer of silty clay in contact with water or prolonged exposure to air its strength rapidly reduced, had better be able to simultaneous excavation and Foundation construction poured concrete bedding in a timely manner.

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