ZJD2800/180C Reverse Circulation Drilling Rig for Large Diameter
and Hard Rock of Cast-in-place Pile or Bored Pile
RCD Machine is a large bored equipment of soil foundation works for
bridges, high-rise and metro construction. the vertical excavation
work by means of the full hydraulic power swivel with rotary bits.
Drill string with special drill bit is used for drilling in the
borehole, and the sand-stone and mud are flushed out through the
drill pipe rods by the pressure difference in the hole.
ZJD series RCD rig is specifically used for foundation drilling of
large diameter of bored pile(1.0-5.0m). This equipment is used for
drilling a borehole through soft and hard rock layers for
foundation construction.
ZJD2800/180C full hydraulic drilling rig can be clamped in the pile
casing and used for vertical pile and tilting pile drilling, This
is an efficient, safe and environmentally solution for:
- Large dia (about 2.8m)
- Depth (more than 150m)
- Hard rock (75Mpa ~ 250Mpa)
- Bore piling in marine conditions, gulf area, port
Working Schematics
Advantages and features
1, High efficiency and energy saving, full hydraulic stepless speed
change, reliable and stable transmission performance.
2, Large torque, large lifting force, especially suitable for
complicated stratum such as gravel, hard rock etc.
3, The suspension tiltable power head and tiltable frame with
compact and reasonable structure, easy to assembly and disassembly.
4, Large diameter drill pipe, using high-pressure gas lift seal
device and advanced RCD method.
5, Optional additional weight to increase pressure in hole bottom,
ensure the verticality of the hole.
6, Optional stabilizer to assist drilling, effectively control the
verticality and hole diameter precision, reduce drilling tool wear.
7, Simple operation, low maintenance cost, comfortable environment
of operation room, optional installation of temperature adjusting
device.
8. High cost efficiency. the overall drilling costs can actually be
reduced by up to 40% when using RCD, safety and requires fewer man
hours, requires less water than other method.
9. Easy to collect samples. Any depth of the sample will help to
study and analysis of geological condition.
Technical Parameters
| Name | Maximum drilling diameter | Maximum drilling depth | Maximum lifting force | Guide frame tilt angle | Power head tilt angle | Crane | Total Weight | Dimension |
| Parameters | Ф2.8(M) | 150(M) | 120(T) | 25(Degree) | 55(Degree) | 1(T) | 25(T) | 4*3.81*7(M) |
| Name | Rotate speed and torque of power head | Drill Pipe Specifications | Power Supply | Total power |
| Parameters | 0~8RPM | 18.5T•M | 0~27RPM | 6T•M | Ф351*20*3000 | 3Phase 380V50HZ | 182(KW) |
| Slag discharge method | Air-lift reverse circulation |
Application Case
 The Hong Kong-Zhuhai-Macao cross sea Bridge
|  Zhejiang Jiashao Bridge
|
 Wenzhou Damen cross sea Bridge
|  Hangzhou Bay cross sea Bridge
|
 Malaysia Penang Bridge
|  Guangzhou-Shenzhen expressway construction site
|
 Mozambique Puto Bridge
|  Yangshan Port inclined pile Project
|
 Phoenix Bridge in Guangzhou Nansha
Development Zone |  Ningbo Xiangshan Harbor Bridge
|
