Drilling method -- RJP method
RJP method also named RODIN JET PILE
method. It is by using kinetic energy that ultra-high pressure spray fluid produced
to damage to the foundation of the organization. Then mixing these damaged soil
particles and hardened materials. This can result in large diameter modified
body.
Ultra-high pressure water and air spray
fluid doing the guide cutting in the upper section. This can create a certain
space. Lower section ultra-high pressure hardening material and air spray fluid
can expand the cutting energy. Compare to the original method that occlusion
space cutting, RJP method is more effective in cutting and destroying soil
effects. In addition, since the energy at the time of cutting is increased, the
mud can be smoothly discharged.
The RJP method installs the ultrahigh
pressure jet nozzle and the cement slurry jet nozzle in the same direction. It
is designed to the back and forth injection angle. As the injection angle is 90º
to 270º, the modified body can be sprayed into a fan-shaped column.
RJP method has the particularity at the
construction site and construction conditions etc. RJP method is a kind of
excellent construction and very economical construction mode.
RJP method is quite suitable for megaproject,
complex foundation project. RJP method uses triple tubes or four tubes and
transport water, air and liquid respectively. And cement liquid is adopts super
high pressure (35-40Mpa) spraying. And the air that around will secondary
impact cut soil. And this can cause a large diameter modified body.
The machine that will be used:
1. XL-50 jet grouting drilling rig
Model
|
XL-50
|
Drilling depth
|
50m
|
Rod dia.
|
Φ42 mm;Φ50 mm
|
Max torque
|
2000N.m
|
Moving speed
|
1.5km/h
|
Climbing capacity
|
20°
|
Rotation speed of top-drive head
|
(high)0-240r/min; (low)0-80r/min
|
Stroke of top-drive head
|
3500mm
|
Rated pull force of top-drive head
|
30KN
|
Rated thrust force of top-drive head
|
12KN
|
Fast lifting and thrust speed of top-drive head
|
0.06-0.9/1.8m/min (jetting)
|
Lifting and dropping speed of top-drive head
|
0-22/0-28m/min
|
Main pump pressure
|
20MPa
|
Auxiliary pump pressure
|
20MPa
|
Power unit
|
22KW
|
Overall dimensions(L*W*H) Working
|
2600x1800x4600 (mm)
|
Overall dimensions(L*W*H) Moving
|
4600x1800x1780 (mm)
|
Weight
|
2500kg
|
2. ZJB/BP
Series High-pressure Grouting Pump with frequency-conversion
|
Model
|
ZJB/BP-55
|
ZJB/BP-55A
|
ZJB/BP-90A
|
|
|
Plunger Dia.(mm)
|
45
|
55
|
45
|
55
|
|
Plunger Stroke(mm)
|
120
|
120
|
120
|
120
|
|
Rate of Flow(L/min)
|
0-114
|
0-160
|
0-114
|
0-160
|
|
Rated Working Pressure(Mpa)
|
30
|
20
|
50
|
30
|
|
Rated Power(kw)
|
55
|
55
|
90
|
90
|
|
Weight(kg)
|
1450
|
1450
|
2200
|
2200
|
|
Overall Dimension (L*W*H, mm)
|
2348*1056*826
|
2348*1056*826
|
2490*1196*915
|
2490*1196*915
|
3. Grout mixer and agitator
|
500L MIXER
|
||
|
Rated
capacity
|
500 liter
|
|
|
Acceptable
W/C ratio
|
≥0.5:1
|
|
|
Rated
Rev.
|
1500rpm
|
|
|
Power
|
7.5kW
|
|
|
Pump
Pressure
|
＞0.2Mpa
|
|
|
Water
tank
|
250L
|
|
|
1000L AGITATOR
|
||
|
Rated
capacity
|
1000 liter
|
|
|
Rated
Rev.
|
35rpm
|
|
|
Power
|
1.5kW
|
|
|
MIXER&AGITATOR
|
||
|
Dimension
|
2500*1920*2280mm
|
|
|
Weight
|
980kg
|
|
For more information, please contact us:
Ada Zhou
Sales
Import
& Export Department
Zhengzhou
Lead Equipment Co., Ltd.
Tel:
+86-371-5560 2617
Fax:
+86-371-6352 6676
Mob
& WhatsApp: +86 187 9029 0809
Skype:
adazhou89
Email: ada@leadcrete.com
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