Top Feed Vibroflots
Applications
The vibroflotation technology is especially suitable to increase the density of granular soil on large foundation treatment projects like hydropower stations, petrochemical plants, port terminals, dams and airport runways; to improve the bearing capacity of the soil, prevent uneven settlement or to treat antiliquefaction ability of the interlayer in some section of the foundation.Vibroflots are mostly handled by crawler cranes (free hanging, in singles or in pairs) or can be mounted to piling or foundation rigs or to excavator boom sticks for smaller depths.
Main Components
- Lifting head with a hook for the crane line and different guide arms for electric cables and water hose.
- Extension tubes of various diameters and lengths to accommodate the required installation depth.
- Vibration damper safeguards the crane from extensive vibrations and consequent damages.
- Electric motor drives the vibration body.
- Vibration body creates horizontal vibrations which densifies and settles the surrounding soil.
- Electric cabinet, standard or variable frequency control for selecting 50-60 Hz frequency conversion.
- Data recorders collect various parameters to optimise the working procedure and for quality control.
- Water pumps to assist penetration and increase compaction.
Model | Power | Rated current | Rotation | Amplitude max. | Power | Weight | Outer Ø | Length | Pile distance |
---|---|---|---|---|---|---|---|---|---|
kW | A | prm | mm | kN | kg | mm | mm | ~m | |
BJV-75E-377 | 75 | 148 | 1,450 | 16 | 175 | 1,929 | 377 | 3,000 | 1.5 - 2.0 |
BJV-100E-377 | 100 | 195 | 1,450 | 18 | 195 | 1,980 | 377 | 3,105 | |
BJV-130E-377 | 130 | 255 | 1,450 | 17 | 195 | 2,050 | 377 | 3,245 | 2.0 - 3.0 |
BJV-180E-377 | 180 | 365 | 1,450 | 16 | 195 | 2,150 | 377 | 3,335 | 3.0 - 3.5 |
BJV-75E-426 | 75 | 148 | 1,450 | 15 | 175 | 2,045 | 426 | 2,785 | 1.5 - 2.0 |
BJV-100E-426 | 100 | 195 | 1,450 | 17 | 195 | 2,170 | 426 | 2,895 | |
BJV-130E-426 | 130 | 255 | 1,450 | 15 | 195 | 2,250 | 426 | 2,965 | 2.0 - 3.0 |
BJV-180E-426 | 180 | 365 | 1,450 | 23 | 280 | 2,320 | 426 | 3,020 | 3.0 - 3.5 |
BJV260E-450 | 260 | 510 | 1,450 | 26 | 440 | 2,980 | 450 | 3,310 | 4.0 - 4.5 |
BJV-75E-377 | |
---|---|
Power | 75 kW |
Rated current | 148 A |
Rotation | 1,450 prm |
Amplitude max. | 16 mm |
Power | 175 kN |
Weight | 1,929 kg |
Outer Ø | 377 mm |
Length | 3,000 mm |
Pile distance | 1.5 - 2.0 ~m |
BJV-100E-377 | |
Power | 100 kW |
Rated current | 195 A |
Rotation | 1,450 prm |
Amplitude max. | 18 mm |
Power | 195 kN |
Weight | 1,980 kg |
Outer Ø | 377 mm |
Length | 3,105 mm |
BJV-130E-377 | |
Power | 130 kW |
Rated current | 255 A |
Rotation | 1,450 prm |
Amplitude max. | 17 mm |
Power | 195 kN |
Weight | 2,050 kg |
Outer Ø | 377 mm |
Length | 3,245 mm |
Pile distance | 2.0 - 3.0 ~m |
BJV-180E-377 | |
Power | 180 kW |
Rated current | 365 A |
Rotation | 1,450 prm |
Amplitude max. | 16 mm |
Power | 195 kN |
Weight | 2,150 kg |
Outer Ø | 377 mm |
Length | 3,335 mm |
Pile distance | 3.0 - 3.5 ~m |
BJV-75E-426 | |
Power | 75 kW |
Rated current | 148 A |
Rotation | 1,450 prm |
Amplitude max. | 15 mm |
Power | 175 kN |
Weight | 2,045 kg |
Outer Ø | 426 mm |
Length | 2,785 mm |
Pile distance | 1.5 - 2.0 ~m |
BJV-100E-426 | |
Power | 100 kW |
Rated current | 195 A |
Rotation | 1,450 prm |
Amplitude max. | 17 mm |
Power | 195 kN |
Weight | 2,170 kg |
Outer Ø | 426 mm |
Length | 2,895 mm |
BJV-130E-426 | |
Power | 130 kW |
Rated current | 255 A |
Rotation | 1,450 prm |
Amplitude max. | 15 mm |
Power | 195 kN |
Weight | 2,250 kg |
Outer Ø | 426 mm |
Length | 2,965 mm |
Pile distance | 2.0 - 3.0 ~m |
BJV-180E-426 | |
Power | 180 kW |
Rated current | 365 A |
Rotation | 1,450 prm |
Amplitude max. | 23 mm |
Power | 280 kN |
Weight | 2,320 kg |
Outer Ø | 426 mm |
Length | 3,020 mm |
Pile distance | 3.0 - 3.5 ~m |
BJV260E-450 | |
Power | 260 kW |
Rated current | 510 A |
Rotation | 1,450 prm |
Amplitude max. | 26 mm |
Power | 440 kN |
Weight | 2,980 kg |
Outer Ø | 450 mm |
Length | 3,310 mm |
Pile distance | 4.0 - 4.5 ~m |
Technical data of other vibroflots (BJV55E-325, BJV75E-325, BJV55E-377 & BJV180E-402) are available on request.
Vibro-compaction
Mostly applied to sandy soil with clay content not exceeding 10%, such as coarse sand, medium coarse sand and gravelly medium coarse sand. In many cases the relative density can be increased to over 80% after vibro-compaction. No additional material is added.
Vibro-replacement - top feed stone columns
Recommended for cohesive soil, soft clay, silty soil and other soil types. After improvement, the bearing capacity can be improved to 200 - 400 kPa. Simple application and perfect when strict pile diameters are not required.
Vibro-replacement - bottom feed stone columns
Applied when encountering muddy soil with undrained shear strength less than 20 kPa. We recommend the particle size of the filler should be 20 - 50 mm, because the limited diameter of the feeder pipe. Mainly used if the poured gravel volume must be exactly controlled, on underwater projects and in areas where the use of water is limited.
Result testing
After treating the soil by vibroflotation, dynamic penetration testing is used to detect the compactness of the pile body. Static penetration testing and standard penetration testing methods are used to determine the bearing capacity of the soil between piles and evaluate the liquefaction resistance of the sand foundation.
Data Recorder
- Remote control of vibroflots and accessories (high-pressure water pump).
- Real time display of working current, depth, voltage and filling amount during vibroflotation process.
- Comprehensive and accurate recording of important construction parameters.
- Assisting the site personnel and improve quality and work efficiency.
- Equipped with intelligent pile driving feedback to reduce construction errors.
- The generated parameter relationship diagram can vividly represent the construction process.
- Indirect reflection of soil layer conditions, providing strong basis for future design and constructions.