【Construction case】SJW-60 high-pressure rotary jet drilling rig

Strata condition

Location (province): Jilin

Location (city): Changchun

Drilling rig model: SJW-60 type rotary jet drilling rig

Drilling tool configuration: 89 triple single high pressure rotary jet drill pipe

Process type: rotary spray reinforcement

Construction technology: triple rotary spray

Strata: Soil, with a few rocks

Construction angle (°): 90

Aperture (mm): 800

Hole depth (m): 18

construction technology

Background configuration:

Anman SJW-60 rotary jet drilling rig;

XPB-90EX grouting pump;

XPB-10 grouting pump;

Screw air compressor SEF210EZ;

Gas tank 1 cubic meter

Changchun Metro Line 6 Subway Entrance Reinforcement Project

1、Move the drilling rig to the position where it is placed;

2、Adjust the level, and the outrigger supports and stabilizes the drilling rig;

3、Drill down: air pressure 0.6～0.8MPa, water pressure 12MPa, slurry pressure 2MPa (with water), and drill down to the required depth;

4、Lifting the drill: the air pressure remains unchanged, the water pressure is 25MPa, the slurry pressure is 3MPa, the lifting speed is 18cm/min, and the rotation speed is 19r/min;

5、The drill bit is 2 meters away from the hole end, the large pump sucks clean water, and the drill pipe is lifted out in about 1 minute;

6、Move the machine to the next hole.

    ——Anman drilling rig sales and service: Li Xiaopeng