Calculation of Horizontal soil stiffness

The soil range of importance for the Horizontal soil stiffness is from the pipeline axis to 1.5 diameter under the pipeline axis, which is the same as for the Downward vertical soil stiffness.

hmtoggle_arrow1NEN 3650-1992

Using the NEN 3650-1992 methodology, the Horizontal soil stiffness is determined using the following equation:

kh

Horizontal soil stiffness

kv

Downward vertical soil stiffness
hmtoggle_arrow1NEN 3650-1:2020

For the NEN 3650-1:2020 methodology, the Horizontal soil stiffness is determined using the following equation:

kh

Horizontal soil stiffness

Qhor

Ultimate horizontal soil reaction

D

Outer diameter of pipeline

KLH (last modified: Jun 26, 2024)