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.