Taking the geological condition in the harbour district Jingtang Port as the model, the detail analysis on lowering water level by large diameter well point are given in the paper.

以京唐港地区地质条件为模型，对大口径井点降水进行了详细的分析，对大口径井点降水在实际工程应用具有理论参考价值。

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Objective To understand water fluoride concentration and application of the fluoride lowering well digging projects in Henan Province.

目的了解河南省降氟改水打井工程水氟含量和工程使用情况。

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Introduces the character, fundamental, technological process and system layout of jet well ground water lowering device.

简要介绍了射流井点降水装置的特点、基本原理以及装置的工艺流程及系统布置。

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