高压管道黄土塌陷情况下的力学分析与计算

Failure of High Pressure Pipeline under Collapse of Loess

根据Winkler线性理论 ,建立了黄土塌陷时管道与土相互作用的力学模型。考虑了管道自重、内压、上方黄土和黄土的内聚力等对管道的作用 ,计算了不同长度管道的应力分布 。

In this paper,the case of collapse is only considered.Under this condition,the soil under the pipe is belived fell down or swept away by flood,therefore the pipe is considered hanging in air a distance between two supports.A model in which the gravity of the pipes,weight of the covering soil,the high pressure and the friction between soils taken into consideration is introduced. The results show that when the hanging length is over 30 m,the pipeline is unsafe.