Plate bearing test

Why measure lift ?

Knowing the capacity of the soil to support a future load without deforming and therefore deciding on a possible reinforcement to adequately size the layers and the structures to come. This is one of the elements of pavement sizing.​

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What is it ?

Measure the deformability of the earthwork level (support soil) and sub-layers (backfill).

When should soil bearing capacity be measured?

Before earthworks: on the subsoil. As the work progresses: on each layer of backfill To receive the earthwork platform, decontamination or demolition backfill.

In road engineering, the bearing capacity of a pavement support, which originates from the CBR (California Bearing Ratio) test developed in 1929, is defined as the ability of a pavement support to resist the stresses and strains applied by traffic.
On construction sites and in the main technical guides for earthworks, bearing capacity is characterized by a deformation modulus.


  • Sétra-LCPC (2000) – Technical guide – Creation of embankments and subgrades – Fascicule 1: general principles and Fascicule 2: technical annexes (GTR).
  • Sétra-LCPC (2000) – Technical guide – Treatment of soils with lime and/or hydraulic binders – Application to the construction of embankments and subgrades (GTS).
  • Sétra (2007) – Technical guide – Design and execution of earthworks; Fascicle 1 : Study and execution of the work; Fascicle 2 : Organization of the controls; Fascicle 3 : test methods (GRT).
  • Bull, liaison Labo P. et Ch. – 122 – Nov-Dec. 1982
  • P. Chassains – The dynaplate 2 Study of a new material – 1995