摘要
为了更精确地计算管道的竖向土压力,总结归纳了10种影响因素,通过改变沟槽坡角和沟槽宽度等结构参数考虑了管道的埋设方式,共建立了10因素5水平的50种正交化数值试验模型,借助正交数值试验的方法评价了管道竖向土压力与各因素的相关程度,并通过单因素规律分析得到了高度显著因素作用下管道竖向土压力的变化规律。结果表明:共有6种高度显著因素,按显著性由大到小依次为管土模量比、回填土泊松比、沟槽坡角、原状土弹性模量、上覆土体高度、沟槽宽度;其中沟槽宽度和管土模量比与竖向土压力系数大致呈正相关,上覆土体高度、沟槽坡角、原状土弹性模量和回填土泊松比与竖向土压力系数大致呈负相关。研究可为管道的竖向土压力系数计算、管道的变形与应力分析提供计算依据。
In order to calculate the vertical earth pressure on pipelines more accurately,10 influencing factors were summarized.By altering structural parameters such as trench slope angle and trench width,different burial methods of pipelines were considered.A total of 50 orthogonal numerical test models were established,using 10 factors with 5 levels each.The correlation between vertical earth pressure on pipelines and various factors was evaluated through orthogonal numerical test,and the variation patterns of vertical earth pressure under the influence of highly significant factors were obtained through single factor analysis.The results showed that there were a total of 6 highly significant factors,listed in order of significance from greatest to least:the pipe-soil modulus ratio,Poisson's ratio of backfill soil,trench slope angle,undisturbed soil elastic modulus,overlying soil height,and trench width.Among these,trench width and pipe-soil modulus ratio were positively correlated with the vertical earth pressure coefficient,while the overlying soil height,trench slope angle,undisturbed soil elastic modulus and Poisson's ratio of backfill soil were negatively correlated with the vertical earth pressure coefficient.The study provides a basis for calculating the vertical earth pressure coefficient and for pipeline deformation and stress analysis.
作者
周鹏
陈金平
李玉坤
赵成军
熊道英
陈瑞瑞
王垚
武黎爽
ZHOU Peng;CHEN Jinping;LI Yukun;ZHAO Chengjun;XIONG Daoying;CHEN Ruirui;WANG Yao;WU Lishuang(College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,China;Shandong Airlines Co.,Ltd,Jinan 250107,China;West Pipeline Company of PipeChina,Urumqi 830013,China;South China Branch of National Oil&Gas Piping Network Corporation,Guangzhou 510620,China;National Pipe Network Group Tianjin Natural Gas Pipeline Co.,Ltd,Tianjin 300457,China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2024年第5期1168-1176,共9页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(52179119)资助。
关键词
竖向土压力
埋地管道
数值模拟
正交试验
单因素分析
vertical earth pressure
buried pipelines
numerical simulation
orthogonal test
single-factor analysis
