【摘要】 基于一维柱面弹性波动理论,推导了埋地管线-土横向动力相互作用等效弹簧系数解析表达式,并对该表达式的影响因素,诸如频率(ω)、管线埋深(d)、管线半径(b)、场地波速(VP)、泊松比(μ)的影响程度进行了分析。分析结果表明,无量纲频率bω/VP取较小值时(<0.1),弹簧系数取值随着管线埋深与管线半径之比γ的增加而增大,但总是限制在2.0G～4.0G(G为土体剪切模量)之间,且泊松比对其影响很小,对于工程实际情况,弹簧系数可在该范围内取值。更多还原

【Abstract】 Based on one-dimensional wave motion theory in cylindrical coordinates,the analytical expression of soil spring constant for buried pipeline-soil lateral dynamic interaction is derived.The influence factors,such as frequency(ω),depth of pipeline(d),radius of pipeline(b),P-wave velocity(VP),Possion ratio(μ) are analyzed.The results show that when non-dimensional frequency bω/VP is smaller than 0.1,soil spring constant increases with the ratio γ of the depth of pipeline over the radius of pipeline,but is limited in 2.0G~4.0G(G= soil shear modulus),meanwhile,the influence of Possion ratio is negligible.For engineering application,the soil spring constant between 2.0G~4.0G is recommended.更多还原