海底管道振动对周围土壤的液化作用试验研究

Experimental Study of Submarine Pipeline Vibration on Liquefaction of Ambient Soil

海底管道在管内多相流、波浪以及砂土的作用下,长时间后可能会出现冲刷淘空现象,从而引起管道的悬空振动。通过试验测量管跨在激振条件下的衰减特性,根据建立的数学模型确定管跨两端支撑砂土的液化流失量。此方法可以为现场海底管道周围砂土液化的定量分析提供参考。

Submarine pipelines can result in scoring due to the combined action of the multiphase flow in the pipes,waves and soil surrounded in a long time,which will lead to vibration of the sub-marine suspended pipelines.Through the experiments,the attenuation characteristics of suspen-ded pipeline segments under the condition of vibration are determined.A mathematical model is presented to determine the liquefaction loss of soil surrounded.This method can provide a refer-ence for quantitative analysis of the soil liquefaction around submarine pipelines.