【Construction case】SJ-25A rotary injection water stop construction

Stratum situation

Drilling rig model: SJ-25A

Drill configuration: 60 double spin drill rod

Process type: rotary spray water stop

Construction technology: double rotary spray

Construction Angle (°): 90

Pore size (mm): 500

Hole depth (m): 12

Construction efficiency (min): 60

Pure drilling time (min): 20

Pure removal removal drill time (min): 15

Construction technology

Construction configuration

One SJ-25A drill and one 90 high pressure pump

Work progress

1、Site leveling, laying steel plate to ensure the smooth and reliable working face of the drilling rig, and determine the position of each pile according to the requirements.

2、Lift the drilling rig to the pile position, adjust the flatness of the drill bit to the center of the pile position, and position the bottom roller drum.

3、Install the drill pipe and drill bit, start the high pressure pump, pressure 10 mpa, direct drilling construction. When it reaches 6 meters, the pressure increases to 24 MPa and drills to 12 meters deep.

4、Control the footage speed, about 300mm per minute, and the following hard layer control at about 100mm per minut.

5、Adjust the high pressure pump pressure to 30 mpa, the lifting speed is 10cm / minute, the rotation speed is 10 rpm / minute, slowly spray to the specified position depth of the hole, and then remove the drill pipe.

6、Clean the drill pipe and drill and move the machine to the next hole.

—— Anman drilling rig sales service: Wang Bing