【Construction case】MXL-150D anchorage drilling rig

Stratum situation

 

Location (province): Shanxi Province

Location (city): Xi'an

Drilling rig model: MXL-150D anchor drilling rig

Drill tool configuration: 76 drill pipe

Process type: rotary jet anchor cable

Construction technology: rotary spray anchor cable

Stratigraphy: soil layer, a small amount of backfill construction waste, etc

Construction Angle (°): 15

Pile diameter (mm): 300

Hole depth (m): 13

Construction efficiency (min): 40

Pure drilling time (min): 15

 

Construction technology

 

One MXL-150D drilling rig and one 90 high pressure pump

1、Level off the site, and determine the position of each pile according to the requirements;

2、Open the drill to the pile position, adjust the flatness of the drill bit to the center of the pile position, and support the leg;

3、Install 76 drill pipe and drill bit cover on the rotary spray anchor cable, start the high pressure pump pressure of 10 Mpa, drilling construction;

4、When the footage, pay attention to the slurry situation and prevent the anchor cable and drill pipe winding, and control the footage speed;

5、The last drill pipe will adjust the high pressure pump pressure to 20 mpa, slowly drill to the specified depth of the bottom of the hole, remove the drill pipe;

6、Move the machine to the next hole position.