1) Positioning, centering and leveling of pile driver
After placing the mixing pile position, move the mixing pile machine to the designated pile position, align and level (level with a level).
2) Adjust the verticality of the guide frame
Use theodolite or plumb bob to control the perpendicularity of the guide frame in both directions. According to the design and specification requirements, the verticality is less than 1.0% of the pile length.
3) Premixed slurry
While the deep mixer is premixing and sinking, the cement slurry is mixed in the background and put into the aggregate hopper before grouting. The cement grade 425 # ordinary silicate cement is used to mix the slurry, the water cement ratio is controlled in the range of 0.45~0.50, and the cement consumption per meter of deep mixing pile is not less than 50Kg according to the design requirements.
4) Agitating subsidence
Start the rotary table of the deep mixing pile machine. When the speed of the mixing head is normal, the drill pipe can be mixed while sinking along the guide frame. The sinking speed can be adjusted by the gear, and the working current should not be greater than the rated value.
5) Shotcrete mixing lifting
After sinking to the design depth, start the mortar pump, send the slurry through the pipeline to the slurry outlet of the mixing head, start the mixing pile machine and tighten the chain device after the slurry is discharged, and lift the drill pipe while spraying and mixing according to the lifting speed (0.50~0.8m/min) determined by the design, so that the slurry and soil can be fully mixed.
6) Repeated mixing and sinking
After the mixing bit is lifted to 500mm above the pile top, turn off the mortar pump, repeat mixing and sink to the design depth, and the sinking speed shall comply with the design requirements.
7) Grouting repeated mixing and lifting
After sinking to the design depth, the shotcrete is repeatedly stirred and lifted to the ground.
8) Pile driver displacement
After the construction of one pile, move the pile driver to the next pile position, and repeat the above steps for the construction of the next pile.
Pinghu Huafeng Cement Products Factory is a large enterprise engaged in cement products for a long time Cement brick The manufacturer specializes in producing cement pipes, U-grooves, square piles, cement piles, road bricks Cement grass planting brick 、 Cement tile Concrete square piles, solid square piles, cement sewer pipes, concrete cement pipes, curbstones, curbstones, and other cement products, welcome new and old customers to consult and negotiate! //www.jxhfslzp.com Service hotline: 130-9562-2833 (Manager Yu)
