In order to investigate the mechanical performance and corresponding vibration isolation measures of large buried pipelines under the environment of surrounding dynamic compaction construction,this study combined the actual conditions and characteristics of a large-caliber flexible pipeline construction project in the Pudong New Area of Shanghai.The LS-DYNA finite element software was used to construct a three-dimensional numerical simulation model of the hammer-soil-pipeline-pipe trench-water system coupling.By employing variable parameters,numerical simulation analysis was conducted to examine the vibration response of the buried pipeline under dynamic compaction operations.The study investigated the effects of construction variables such as hammer impact point-pipe distance and impact energy,as well as design elements like pile foundations,U-shaped rein-forced concrete pipe trenches,and water inside the pipe on pipeline vibration.Suggestions for construction protective measures regarding vibration response of the buried pipeline in this engineering project were proposed.The research findings have signifi-cant reference value for the design and construction of future buried pipeline projects in beach areas.
关键词
强夯/管道/动力响应/有限元计算/振动/LS-DYNA
Key words
dynamic compaction/pipeline/dynamic response/finite element calculation/vibration/LS-DYNA
维普
万方数据