Soil spring constant of buried pipeline-soil longitudinal dynamic interaction

Abstract:

Soil spring constant of buried pipeline-soil longitudinal dynamic interaction based on theory and shaking table test is presented. According to one-dimensional SH wave motion theory in cylindrical coordinates ,Matsubara&Hoshiya’s theoretical expression is reinterpreted. Based on shaking table test data of buried pipeline –soil dynamic interaction subjected to small earthquake excitation(0.1g), the soil spring constant is analyzed. The results show that on this test condition the two values of soil spring constant are similar ,and the relative deviation is about 7.4% , that verifies the rationality of theoretical solution . Furthermore, soil spring constant at small slippage between pipeline and soil is recommended for engineering application, that is 0.6G-2.0G(G=soil shear modulus).