WAVE CELERITY IN BURIED PIPES

B. SALAH, F. MASSOUH, Ahmed KETTAB, B. MBANGANGGOYE

Résumé


Abstract :
In this work, we are interested in the effect of the external load exerted by the soil on the
celerity of propagation of water hammer wave in the case of buried pipes. A modelling of the
mechanical behaviour of the pipe is proposed in order to define the deformability of pipe
section. The study is carried out on simple and multiple wall pipes. To take into account the
effect of surrounding soil, we suppose that this latter behaves as a cylinder with an infinite
thickness and functioning as an elastic spring. In order to make obvious the effect of the
external load on the increasing of wave celerity, we present numerical examples using
different pipe materials and the diameter to thickness ratios currently used in practice. The
results are presented as percentage of celerity increasing in comparison to the case of free
pipes.

Texte intégral :

PDF