我院水源二队在邯郸、安阳等地进行供水水文地质勘察时,对于起拔套管,摸索出一套比较成功的经验。所勘探的地区,都是第四纪冲积洪积层及第三纪地层,第四纪厚度一般在30—120米。为疏松砂质粘土、淤泥质砂质粘土、粘质砂土、砂砾石、卵石、粘土、粘土夹姜石、粘土含卵石及卵石含粘土等岩层,下部第三纪为红粘土、砂岩、砂砾岩。钻孔均打穿第四地层,再打入第三纪地层5—15米,个别孔打入第三纪地层较深,有的达100米以上,因此我们的 Two teams in our hospital in Handan, Anyang and other places for water hydrogeological investigation, pulling up the casing, to explore a more successful experience. The areas explored are Quaternary Alluvial and Tertiary stratigraphy, Quaternary thickness is generally 30-120 meters. For loose sandy clay, muddy sandy clay, clay sand, gravel, pebbles, clay, clay clip ginger, clay pebbles and pebbles containing clay and other rock formations, the lower Tertiary red clay, sandstone, gravel rock. The boreholes all penetrate the fourth layer, and then into the Tertiary strata 5-15 meters, some holes into the Tertiary strata deeper, and some up to 100 meters above, so our