Obtaining pressuremeter parameters

See AFNOR, Annex D (normative) Obtaining pressuremeter parameters, NF EN ISO 22476-4, AFNOR, 2015, p.38.

Obtaining the Ménard pressuremeter modulus

See AFNOR, D.5 Obtaining the Ménard pressuremeter modulus, NF EN ISO 22476-4, AFNOR, 2015, p.44.

Ménard pressuremeter modulus E_M

See AFNOR, D.5.2 Ménard pressuremeter modulus E_M, NF EN ISO 22476-4, AFNOR, 2015, p.44-45.

According to the type of probe cover, the pressuremeter modulus shall be obtained by using the corresponding equations given in D.5.2.2 or D.5.2.3.

D.5.2.2 Flexible cover

In the Geo-log 4 report this corresponds to the following interface:

D.5.2.3 Slotted tube

where

• ν is the Poisson’s ratio;
• is the volume of the central measuring cell, without slotted tube;
• is the effective volume of the slotted tube;
• 

The corresponding equation according to either D.5.2.2 or D.5.2.3 used shall be reported.

In the Geo-log 4 report this corresponds to the following interface:

In the case of a slotted tube the Flexible cover method (D.5.2.2) is also possible, V_c being calculated from volume loss test.