Top Feed Vibroflots

Updated: 13.01.2025
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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.
ModelPowerRated currentRotationAmplitude max.PowerWeightOuter ØLengthPile distance
kWAprmmmkNkgmmmm~m
BJV-75E-377751481,450161751,9293773,0001.5 - 2.0
BJV-100E-3771001951,450181951,9803773,105
BJV-130E-3771302551,450171952,0503773,2452.0 - 3.0
BJV-180E-3771803651,450161952,1503773,3353.0 - 3.5
BJV-75E-426751481,450151752,0454262,7851.5 - 2.0
BJV-100E-4261001951,450171952,1704262,895
BJV-130E-4261302551,450151952,2504262,9652.0 - 3.0
BJV-180E-4261803651,450232802,3204263,0203.0 - 3.5
BJV260E-4502605101,450264402,9804503,3104.0 - 4.5
BJV-75E-377
Power75 kW
Rated current148 A
Rotation1,450 prm
Amplitude max.16 mm
Power175 kN
Weight1,929 kg
Outer Ø377 mm
Length3,000 mm
Pile distance1.5 - 2.0 ~m
 
BJV-100E-377
Power100 kW
Rated current195 A
Rotation1,450 prm
Amplitude max.18 mm
Power195 kN
Weight1,980 kg
Outer Ø377 mm
Length3,105 mm
 
BJV-130E-377
Power130 kW
Rated current255 A
Rotation1,450 prm
Amplitude max.17 mm
Power195 kN
Weight2,050 kg
Outer Ø377 mm
Length3,245 mm
Pile distance2.0 - 3.0 ~m
 
BJV-180E-377
Power180 kW
Rated current365 A
Rotation1,450 prm
Amplitude max.16 mm
Power195 kN
Weight2,150 kg
Outer Ø377 mm
Length3,335 mm
Pile distance3.0 - 3.5 ~m
 
BJV-75E-426
Power75 kW
Rated current148 A
Rotation1,450 prm
Amplitude max.15 mm
Power175 kN
Weight2,045 kg
Outer Ø426 mm
Length2,785 mm
Pile distance1.5 - 2.0 ~m
 
BJV-100E-426
Power100 kW
Rated current195 A
Rotation1,450 prm
Amplitude max.17 mm
Power195 kN
Weight2,170 kg
Outer Ø426 mm
Length2,895 mm
 
BJV-130E-426
Power130 kW
Rated current255 A
Rotation1,450 prm
Amplitude max.15 mm
Power195 kN
Weight2,250 kg
Outer Ø426 mm
Length2,965 mm
Pile distance2.0 - 3.0 ~m
 
BJV-180E-426
Power180 kW
Rated current365 A
Rotation1,450 prm
Amplitude max.23 mm
Power280 kN
Weight2,320 kg
Outer Ø426 mm
Length3,020 mm
Pile distance3.0 - 3.5 ~m
 
BJV260E-450
Power260 kW
Rated current510 A
Rotation1,450 prm
Amplitude max.26 mm
Power440 kN
Weight2,980 kg
Outer Ø450 mm
Length3,310 mm
Pile distance4.0 - 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.