【Construction case】SJL-60 rotary jet drill jet reinforcement construction

 

Formation information

 

Location (province): Guangdong

Location (city): Shenzhen

Drill rig model: SJL-60 rotary jet drill

Drill tool configuration: 89 triple rotary spray drill pipe

Process type: rotary spray reinforcement

Construction technology: triple rotary spray

Stratigraphy: backfill the soil layer

Construction Angle: (): 90

Pore size (mm): 800

Hole depth (m): 11

 

 

construction technology

 

1、Site leveling, hole position placement point;

 

2、The rig is in place, and then use the leg to adjust the verticality of the rig pushing the frame;

 

3、Test the operation of air compressor, high pressure pump and grouting pump for test injection;

 

4、Quickly drill the connected drill pipe to the required predetermined depth for rotary injection operation: lifting speed 10-12cm / min, speed 15-18 r/min, high pressure pressure 30-32MPa, cement slurry pressure 1-2MPa, air pressure 0.7 MPa;

Note: the elevated drilling rig lifting process does not need to remove the drill rod, pay attention to observe the grouting situation

 

5、The drill bit is lifted to the orifice position to reduce the pressure of the high-pressure water pump;

 

6、Pull out the drill pipe, clean the grouting pump, drill pipe, grouting pipe, etc., and move the machine to the next pile position for construction.             

 

—— Anman Drilling Rig sales service: Wang Qilong