Geotechnical probesThe pressure-meter test consists of progressively applying a lateral load to the terrain using a radially adjustable cylindrical probe which is introduced into the ground. In this way, a curve is obtained showing soil deformation variations corresponding to the pressure applied.

 

The following table show the Igeotest pressure-meters / dilatometers:

PRESSURE-METER DEFORMATION MEASUREMENT TYPE DIAMETER (mm) WORK PRESSURE [bars]
MENARD VOLUMETRIC PBP 32, 44, 60 y 74 80
Igeotest PRD DISPLACEMENT PBP 72, 82, 93 300
OYO DISPLACEMENT PBP 72, 83, 93 200
Igeotest CPM VOLUMETRIC PIP 32 80

 

There are different mechanisms for inserting the probe into the ground and surveys are divided into different types: self-boring (SBP), push-in(PIP) y pre-bored (PBP) pressure-meters.

It is suitable for use both in soft soils - where the device is introduced into the ground by means of static penetration - and hard soils, where a borehole must be made previous to sampling. The sample container has a 35 ml volume, allowing samples of up to 34.8 ml to be taken.

 

Advantages

  • Determining the shear modulus (G), pressure-metric modulus (E) and limit pressure (pl) of the ground.
  • Calculation of the load-bearing capacity and settlement of deep and shallow foundations.
  • Calculation of negative pile friction.
  • Design of laterally-loaded piles.
  • Estimation of classical shear parameters