【单选题】【消耗次数:1】
环形轻型井点,井点管围成的面积314m3,则假想半径为:( )
5m
10m
15m
20m
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相关题目
【判断题】 当土层渗透系数为20~200m/d,降低水位深度为3~5m时,井点降水方法宜选用喷射井点。
①  正确
②  错误
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【判断题】 土的渗透系数小于0.1m/d时,应选择喷射轻型井点降水
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【单选题】 轻型井点的井点孔口到地面以下0.5~1.0m的深度范围内,使用粘土填塞的主要目的是:()。(第二章知识点8井点降水)
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