The bladed heavy
drill (hammer) is raised to a certain height by means of the frame and winch, and the free-falling impact force is used to cut the broken rock or hit the soil to form a hole.
Impact
drill has cross - shaped, i-shaped, herringbone, commonly used cross - shaped impact drill.
Steel guard should be embedded before punching, and protective wall material should be prepared.
After the impact drill is in place, the center of the correction hammer drill should be pointed at the center of the cylinder, and the impact should be low and dense within the range of 0.4 ~ 0.8m of the stroke, and stones and mud retaining wall should be added in time. After the cylinder sinks 3 ~ 4m, the stroke can be increased to 1.5 ~ 2.0m, and the relative density of mud can be measured and controlled at any time.
During the construction, should often check the damage of the wire rope, the tightness of the clamping machine and whether the steering device is flexible, so as to avoid drilling.
