澜沧江跨越管段天然气管道落石条件下应力分析  

Stress analysis of Lantsang crossing gas pipeline under rock falling situation

作　　者：上官方媛 黄坤[1] 吴世娟[2] 马剑林 米瑞雪 

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500 [2]中石化西南油气分公司广西采油厂,德阳618000 [3]中国石油西南管道公司,成都610000 [4]西南油气田公司华油集团凯源燃气西永分公司,重庆401332

出　　处：《应用力学学报》2017年第3期483-488,共6页Chinese Journal of Applied Mechanics

基　　金："十三五"国家重点专项(2016YFC0802100);中国工程院咨询研究项目(2015-XZ-37)

摘　　要：澜沧江跨越管道工程的跨越区山体高耸挺拔、地势险峻,两岸陡崖上分布有危岩及崩塌堆积体,其地理位置极易受到崩塌落石危害,落石冲击作用会造成管道刮痕、压坑,引起管道变形失稳甚至破裂,造成油品泄漏。本文以澜沧江跨越段管道及两岸落石为研究对象,首先运用Roc Fall软件建立落石运动路径数值模拟模型,分析落石质量对落石运动过程的影响,并探究了不同质量落石撞击管道时,落石携带的最大动能等特性参数影响规律;然后运用CAESAR II软件对澜沧江跨越段天然气管道进行分析,确定会使其处于危险(或被破坏)状态的落石质量阈值。分析结果可为澜沧江跨越管道落石灾害防护和管道安全运营决策提供科学建议,也可以为地理条件与澜沧江管道相似的管道工程设计、敷设施工、上方危岩防护规划提供指导和借鉴。In Lantsang bridge and tunnel crossing project,the mountains are high and steep,and the terrain is precipitous in crossing region.Up in the cliff,there distribute many unstable rocks and collapse-slide accumulations.During the pipeline operation stage,rock fall situation had already occurred in this region.The scratch and pressing hole are caused by rockfall impact,as well as pipeline deformation instability,ruptures and oil leakage.This paper takes crossing section pipeline and falling rock existing on both sides as research objects.Using Roc Fall the numerical stimulation model of rock motion path is established.By rock motion path numerical stimulation model,rock mass and falling heights,as well as the influence on the various characteristic parameters(such as the largest kinetic energy when it hits the pipe)are studied.Stress simulation analysis is conducted on the crossing pipeline by CAESAR II,and it identifies that how heavy of these rocks can be to put these pipelines in a dangerous or completely destroyed state.The method provides scientific recommendation to the rockfall protection and pipeline security of Lantsang crossing pipeline,and it also offers guidance and reference to the pipeline engineering which has similar geographic conditions with Lantsang crossing pipeline,such as its design,laying construction and rock protection planning.

关 键 词：澜沧江跨越管道 落石运动路径 管道应力分析 落石质量阈值 

分 类 号：X937[环境科学与工程—安全科学]