岩土崩塌冲击作用下埋地管道应力与变形分析

基于散体极限平衡条件,利用马斯顿提出的沟内埋管垂直土压力计算模型,对存在冲击荷载情况的埋地管道受力进行分析,同时根据弹性半空间理论对落石冲击荷载情况下管道轴向附加荷载分布情况进行了计算分析。在利用传统的应力设计进行分析校核的同时,应用竖向变形量设计理念,研究了落石垂直冲击管道正上方时管道变形情况,以此来判断管道失效与否,为地质崩塌灾害易发区埋地管道的铺设方式提供理论和实践依据。

Analysis of the Buried Pipeline Stress and Deformation due to the Impact Load of Landslide

Based on the limits of a condition for equilibrium and by making use of Maston＇s calculation model of the vertical soil pressure,the stress on buried pipeline from impact load is analyzed and calculated.Through the analysis of the traditional stress,the design concept of the vertical deformation is applied to analyze the deformation of the above pipeline hit by the falling rocks,so as to judge whether the pipe turns to be failure or not.Thus,a theoretic and practical basis is provided for the way to bury pipelines in the landslide disaster area.