><< ) Zhengji manufacturer sells
>Generally long spiral drill bits, the diameter of the drill rod is between. The construction process is as follows:
> Long spiral dry drilling and grouting (reinforced steel) concrete piles are made by a long spiral drill machine. After drilling, the cement slurry is injected while lifting the drill. After lifting the drill, the steel cage is placed and A method of continuously forming holes and piles by throwing gravel. This pile type can increase pile side resistance while forming an enlarged head at the pile end. This construction method can be used under general geological conditions. It has a good effect when passing through the pebble layer, can enter the strongly weathered medium-soft rock layer, and can successfully overcome the soft soil, silt, sand and other easily collapsed strata below the water table. The pile body is made of sand-free concrete, and its strength is no less than that of the grouting pressure provided by the high-pressure pump for drilling holes with a long spiral drilling tool (the larger value is used for larger diameters). The pressure of secondary grouting is controlled at ~, and the dosage is based on the stratigraphic conditions of the site. For sandy soil, the amount of secondary grouting is controlled at ~ times. For cobblestone layer, the amount of secondary grouting is controlled at ~ times. For clayey soil, the amount is small, and the amount of grouting is controlled at ~ times.
>Zhengji has a variety of drilling tools, which are designed and configured according to the formation conditions and drilling rig characteristics.
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Dry hole forming pile auger bits for sale