铁路重载下涵洞防护埋地管线效果分析  

Effect Analysis of Culvert Protecting Buried Pipeline Under the Condition of Railway Heavy-load

作　　者：刘金孟 饶趁明 李晰 彭亚雄[2] 

机构地区：[1]中铁四院集团西南勘察设计有限公司 [2]中国地质大学(武汉) [3]云南地质工程勘察设计研究院

出　　处：《油气田地面工程》2016年第7期100-103,共4页Oil-Gas Field Surface Engineering

基　　金：湖北省科技厅自然基金重点基金项目(2013CFA110)

摘　　要：涵洞结构可承受上部路面荷载起到保护埋地管线的作用。以现浇整体箱涵和预制盖板涵为对象分别建立有限元模型,研究铁路重载下埋地天然气管道的受力变形规律。对比分析两者防护效果的结果表明,受上部荷载作用,两种结构对管道均有良好的防护作用。盖板涵下的管道最大应力值为4.298×10~5Pa,管道最大位移值为6.826×10^(-4)m,其最大应力与变形均在管顶中心附近;而箱涵保护下的管道最大应力值为盖板涵工况的67.9%,最大形变值为盖板涵工况的73.3%,箱涵更利于分担管道载荷和减小管道位移。现浇整体箱涵的涵顶两端与涵身固接,整体性优于盖板涵,此结构对管道的防护效果更好。The culvert structure has the effect of-protecting buried pipeline by bearing the upper load. The finite element models of cast-in-site monolithic culvert and prefabricated slab culvert are created, the mechanical deformation law of buried gas pipeline under the heavily loaded bed are researched, also a comparison of the protecting effect is made. Simulation results shows that structures have a good protective effect on pipeline, both maximum stress and maximum displacement occur at the top of-pipeline; Maximum piping stress under slab culvert is 4.298 × 10^5 Pa, the culvert is more conducive to share load; maximum pipeline displacement is 6.826×10^ 4 m, the value under culvert is its 73.3%, the culvert is more conducive to reduce displacement, both sides of cast-in-site monolithic culvert is fixed to culvert, integrity superior to slab culvert, its protective effect is relatively better.

关 键 词：管道保护 涵洞结构 铁路重载 有限元分析 

分 类 号：TE973[石油与天然气工程—石油机械设备]