埋设管道竖向抬升时的土体抗力研究  

Research on the Soil Resistance in Vertical Uplifting of Buried Pipeline

作　　者：谭双妮[1] 段梦兰[1] 张玉[1] 曾霞光[1] 唐彪[1] 

机构地区：[1]中国石油大学(北京)机械与储运工程学院海洋油气研究中心

出　　处：《石油机械》2014年第3期38-42,共5页China Petroleum Machinery

基　　金：国家重大基础研究发展计划(973计划)项目"深海工程结构的极端环境作用与全寿命服役安全"之子课题"深海柔性结构的非线性流固耦合振动与破坏机理"(2011CB013702)

摘　　要：利用有限元软件ABAQUS来建模分析海底埋设管道在疏松、中等密度和致密砂土中不同埋深比下,管道竖向抬升时土抗力随位移的变化。分析结果表明,砂土的竖向土抗力随埋深比增加而增大,竖向土抗力达峰值时管道的竖向抬升位移也随之增大,砂土越密实最大竖向土抗力越大;当埋深比为2、3、4时,土体表面有明显的隆起现象;达到最大竖向土抗力时管道的竖向位移随着埋深增加而增大。分析结果与试验结果和理论结果相符,验证了有限元分析计算的可行性。最后指出,研究管道隆起屈曲过程中竖向土抗力的发挥过程和变化规律具有实际的工程意义。The large finite element software ABAQUS was used to conduct modeling and analyze the variation of buried pipeline soil resistance with displacement in vertical uplifting in different buried depth ratios in loose, me- dium-density or dense sand. The analysis shows that the vertical resistance of sand increases with the increase of buried depth ratio. When the vertical resistance reaches the peak, the vertical uplifting displacement of pipeline will increase. The denser the sand, the greater the maximum vertical resistance. When the buried depth ratio is 2, 3 and 4, the noticeable upheaval will occur on the soil surface. When the maximum vertical resistance occurs, the vertical displacement of pipeline will increase with the increase of buried depth. The analysis is in agreement with the rele- vant experimental and theoretical findings, verifying the feasibility of finite element analysis and calculation.

关 键 词：海底 埋设管道 隆起屈曲 竖向土抗力 有限元分析 

分 类 号：TE952[石油与天然气工程—石油机械设备]