vibroflottazione

VIBROFLOTS


Ground treatment with the VibroSTA method meets a wide range of bearing capacity and reliable ground improvement requirements and provides an economical alternative to more expensive deep foundation technologies.

The equipment designed and manufactured by STA was born at the beginning of the ’80 years with the first hydraulic vibroflots. The improvement of the equipment has never stopped during the years increasing the quality and the range of accessories. A particular elastic isolator completely stops the vibrations from the head of the VibroSTA. This isolator is very simple and strong and it has been manufactured also for other constructor’s equipment.

The constant request of more and more productivity and the application of the VibroSTA method in a wide range of soils has created a new method of application named Bottom Feed. For soft saturated more cohesive soils not compactable. The VibroSTA penetrates to the required depth displacing the soil laterally, then it is replaced by stones. The stones which are also compacted create a so called "stone column". With a second pipe near the main extension tubes, the stones are carried into the hole near the tip of the VibroSTA optimizing works in deep water or in particular soft soils.

The whole equipment is composed by a vibrating part which moves thanks to an internal rotative eccentric mass and a pulley block linked to the crane with suspension ropes. The extension pipes link the main parts in order to reach the requested length of the VibroSTA.

A stone tank can be applied at the top of the VibroSTA for the bottom feed method.
The whole system is powered by a due hydraulic power pack designed and manufactured
by STA.


VIBRO STA7500

1.700/1.900 r.p.m.
   
Power of VibroSTA 154 kW
Operative frequence 30 Hz
Operative centrifugal force 230 kN
Amplitude 26mm
Wear shield easy to replace and manufactured with wear resistant steel
Pulley head predisposed for oil and water links
Extension pipes Variable lenght available
Total weight 3.800 Kg (10 m applications)
Weight of extension 1.300 Kg
 
POWER PACK V. 7.500  

Engine power

220 KW

Operative oil flow

250 lpm

Oil flow max

290 lpm

Pressure

340 bar

Oil tank

1500 lt

Width

2000

Length

3600

Height

2050

Weight 4 Ton
 

The Vibro STA is proposed with different models of water pumps that can be normally powered by the power pack V 7500


VIBRO STA7500 IR

2.400/3.000 r.p.m.
   

Power of VibroSTA

154 kW

Operative frequence

50 Hz

Operative centrifugal force

230 kN

Amplitude

12 mm

Wear shield

easy to replace and manufactured with wear resistant steel

Pulley head

Predisposed for oil and water links

Extension pipes

Variable lenght available

Total weight

3.300 Kg 10 m application

Weight of extension

1.100 Kg


The Vibro STA is proposed with different models of water pumps that can be normally powered by the power pack V 7500.


VIBRO STA5000

   

Power of Vibrolance

112 kW

Operative frequence

50 Hz

Operative centrifugal force

120 kN

Amplitude

9,5 mm

Wear shield

easy replacement and manufactured with special heavy steel

Extension pipes

Variable lenght available

Total weight

3.800 Kg (13 m)

Oil flow

180 lpm

Pressure 310 bar


STONE TANK AND DATA LOGGER

The vibro can be equipped for the bottom feed method with a stone tank (7 m³ in the picture) and a second extension tube and check valves for the control of the gravel flow.
The valves for the control of the gravel flow between the tank and the top of the vibro and the extension tubes are are hydraulically managed.

The Data Logger collects real time data such as:

  • pressure;
  • rate of depth;
  • flow rates;
  • load and pulling force.

The collection of all such data are managed by the due software in order to virtually rebuilt “the story” of the different columns.

The Data Logger System is usefull to control the vibrocompactation of the soil and the working depth.

The STA System can also be configured not only for depth and vibrocompactation control but also for loading the gravel at the different steps of the stone column.

 

The Data Logger display is normally positioned on the crane cabin.

vibroflottazione

vibroflottazione

vibroflottazione


sta7500

powerpack


sta5000


sta5000


vibroflottazione

vibroflottazione

vibroflottazione
STA-SRL vibro and grouting equipment - Via delle Industrie, 2 -20060- Mediglia (MI) ITALY
Phone:+39 02 90661181 Fax: +39 02 90660421 E-mail: contact@sta-srl.info