在含水层厚,颗粒粗,透水性好,补给源充足的有利条件下,为提高单井出水能力,设计中可采用以下几项技术措施 一、加大井的直径 一般建议井径不小于300mm为宜。在井的施工中应考虑充分发挥钻机的设备能力,尽量用大口径管,使井管外每侧填砾厚100—150mm左右。 实验证明,当井孔直径由φ300mm增大到φ500mm,使与管 In the thick aquifer, coarse particles, good water permeability, adequate supply of favorable conditions, in order to improve single-well water discharge capacity, the design can be used in the following technical measures First, to increase the diameter of the well Generally recommended diameter of not less than 300mm should. In the well construction should consider giving full play to the drilling rig equipment capacity, try to use large-caliber pipe, so that each side of well pipe filling gravel thickness of about 100-150mm. Experiments show that when the hole diameter increased from φ300mm to φ500mm, with the tube