横穿状态下滑坡对管道推力的计算  

A calculation of landslide thrust force to transverse pipelines

作　　者：郝建斌[1,2] 刘建平[2] 荆宏远[2] 张合印 沈飞军 佟昊林[5] 刘黎明[6] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500 [2]中国石油管道科技研究中心,河北廊坊065000 [3]中国石油管道公司大庆输油气分公司,黑龙江大庆163458 [4]中国石油管道公司华中输气分公司,湖北武汉430074 [5]浙江大学控制科学与工程学系,浙江杭州310058 [6]中国石油塔里木油田公司天然气事业部,新疆库尔勒841000

出　　处：《石油学报》2012年第6期1093-1097,共5页Acta Petrolei Sinica

基　　金：中国石油天然气股份有限公司科技攻关项目"油气管道滑坡和崩塌地质灾害评价标准及防治规范研究"(070102)资助

摘　　要：滑坡是长输油气管道主要的地质灾害风险之一,滑坡对管道的推力计算是滑坡灾害风险定量评价的重要内容。针对管道横穿均质土滑坡的情况,在对滑坡与管道相互作用过程分析的基础上,利用极限平衡法推导了横穿敷设情况下滑坡对管道推力的计算方法,并利用数值模拟验证了该计算方法的合理性。结合实际案例,进一步分析了管道埋深、直径和滑坡土体内摩擦角、黏聚力、容重等因素对推力的影响,并计算了滑坡推挤导致的管道附加应力。结果表明,管道直径、埋深和滑坡体土体性质是影响推力大小的主要因素;管道能承受的滑坡推力很小,应对滑坡灾害予以足够的重视。Landslide is one of the major geohazard risks for pipelines.A calculation of landslide thrust force to transverse pipelines is an indispensable content of the quantitative risk evaluation.In view of the situation that a pipeline may transversely pass through the homogeneous soil landslide,the interaction between landslide and pipelines was analyzed and a formula for calculating landslide thrust force to transverse pipelines was deduced using a limit equilibrium method.Numerical simulation was performed to verify the rationality of the formula.A calculation example shows that the result of the formula corresponds to the reality.Effects of the buried depth and diameter of pipelines as well as the angle of internal friction,cohesion and volume weight of soil on thrust force were investigated,and the additional stress of pipelines caused by landslide was calculated as well.The result shows that the diameter and buried depth of pipelines and soil properties of landslide are the primary influential factors to the intensity of thrust force.Pipelines usually have less resistance to huge thrust force of landslide,thus enough attention should be paid to pipelines subject to landslide hazard.

关 键 词：油气管道 横穿敷设 滑坡 推力 应力 

分 类 号：TE78[石油与天然气工程]