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基础深度在天然地下水位以下时,可采用井点降水,达到设计基底标高时,不出现流砂,保证基坑内干燥,以便工程的正常施工。
When the foundation depth is below the natural groundwater table, well-point precipitation can be used. When the design base elevation is reached, there will be no quicksand, and the foundation pit will be dry to ensure the normal construction of the project.