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打井穿过流沙,这是我们一贯感到困难的技术问题。几年来,我省打井技工和从事打井工作的干部,先后创造了许多先进的克服流沙办法,其中适于就地取材、成本低廉、技术简单、出水量大、对克服流沙效果良好,而且可以适用于各种沙层的,是苇砾滤水层井筒或泉管。苇砾滤水层机井的构造是:在“56”型井小砖筒外或木质泉管外包裹一层苇篾,苇篾外再填充一层砂砾滤水层。砂砾的作用是使水通过时拦住水井周围土壤的微细砂粒,使清水进入井中,苇篾的作用主要是拦堵沙砾。经验证明,使用苇砾滤水层打大型机井,只要严格掌握施工质量,都可达到预期的效果。施工时要掌握以下各点:
Drilling wells through quicksand is a technical issue that we have always felt difficult. Over the past few years, our province’s well-drilling mechanics and drillers engaged in well drilling have successively created many advanced measures to overcome the problem of quicksand, of which, they are suitable for local use, low cost, simple technology, large amount of water, and good effect for overcoming quicksand Can be applied to a variety of sand, reed gravel aquifer wellbore or spring tube. Reed gravel aquifer wells structure is: in the “56” type wells outside the brick barrel or wooden spring pipe wrapped with a layer of reed, reed outside and then fill a layer of gravel drainage layer. The role of gravel is to stop water through the soil around the fine sand particles, so that water into the well, the main effect of reed boulders block grit. Experience shows that the use of reed drainage layer to play large wells, as long as strict control of construction quality, can achieve the desired results. Construction to master the following points: