Stratigraphic Situation
Location (Province): Jiangsu
Location (City): Wuxi
Drilling rig model: SJL-120 rotary spray drilling rig
Drilling tool configuration: Anman 142 series multi-hole drill bit, drill pipe, splitter
Process Type: Water stop by rotary spray
Construction process: MJS method
Ground conditions: 1-4m backfill layer
4-20m clay layer
Construction angle(°):90
Pile diameter (mm): 2000
Hole depth(m):20
Construction techniques
Construction configuration:
One Anman SJL-120 drilling rig
Backstage configuration:
One 230 high-pressure pump
165 high-pressure pump
One 90E high-pressure pump
One 9 cubic meter air compressor
Nozzle selection 2.8
Construction background configuration diagram
1、determine the position of each pile as required.
2、Install a 280mm drill bit for the pilot hole rig to pilot the hole, pay attention to the feed rate during construction to prevent skewing, and dismantle the drill pipe after hitting the required depth.
3、After the SJL-120 drilling rig is installed with the drill bit (internal clamp clamping), align the holes as required, adjust the verticality and brace the legs.
4、test and check whether the high-pressure pump, mixing station, air compressor, nozzle, flow meter, pressure sensor, background data transmitting terminal and drilling rig receiving module display, data recording, etc. are normal.
5、seal the grouting nozzle and cutting water nozzle with transparent tape, connect the drill pipe in turn (pay attention to check the seal when connecting the drill pipe), and finally install the diverter.
Anman engineers on-site guidance
6、Turn on the air compressor, high pressure pump and mixing station. 230 high pressure pump slurry pressure 40Mpa, 90E reverse suction 15Mpa, air pressure 1.0Mpa, 360° swing spraying rotary speed 6r/min, step stroke 30mm/min, pay attention to the change of rotary pressure and slurry return during the construction process, dismantle the drill pipe to clean it in time to prevent plugging the hole.
——Anman drilling rig sales and service: Wang Bing