[1]刘宽,肖成志,王子寒.格栅防护埋地管道承载特性及设计参数分析[J].深圳大学学报理工版,2019,36(1):52-60.[doi:10.3724/SP.J.1249.2019.01052]
 LIU Kuan,XIAO Chengzhi,and WANG Zihan.Performance of bearing capacity and analysis of design parameters for buried pipes reinforced by geogrid[J].Journal of Shenzhen University Science and Engineering,2019,36(1):52-60.[doi:10.3724/SP.J.1249.2019.01052]
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格栅防护埋地管道承载特性及设计参数分析()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第36卷
期数:
2019年第1期
页码:
52-60
栏目:
土木建筑工程
出版日期:
2019-01-20

文章信息/Info

Title:
Performance of bearing capacity and analysis of design parameters for buried pipes reinforced by geogrid
作者:
刘宽肖成志王子寒
河北工业大学土木与交通学院,天津 300401
Author(s):
LIU Kuan XIAO Chengzhi and WANG Zihan
School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, P.R.China
关键词:
岩土工程埋地管道土工格栅极限承载力破坏模式数值模拟静载
Keywords:
geotechnical engineering buried pipes geogrid ultimate bearing capacity failure mode numerical simulation static loading
分类号:
TU 441
DOI:
10.3724/SP.J.1249.2019.01052
摘要:
为研究在土工格栅加筋防护埋地管道中筋材铺设和管周土体参数对防护管道性能的影响,基于有限元数值方法,综合分析了静载作用下了土体内摩擦角、筋材埋深、管道埋深和加载宽度等因素对管道力学与变形性能的影响. 结果表明:极限承载力随内摩擦角增大显著提高;筋材埋深在加载板宽度的0.2倍左右时,加筋效果显著;增大管道埋深,可显著提升极限承载力,同时降低管道变形;减小加载宽度,可使破坏形式由管道变形失效转变为土体地基破坏,同时降低极限承载力;格栅加筋效果与管道的最终变形量的变化密切相关;格栅加筋后与加筋前的极限承载力比值随土体内摩擦角和管道埋深的增大而减小,随加载宽度的增加先增大后减小.
Abstract:
In order to study the effect of parameters related with geogrid and surrounding soil of pipes on the performance of buried pipes reinforced by geogrids, comprehensive analysis based on finite element method are carried out to investigate the effect of internal frictional angle of soil, embedment depths of geogrids, and buried depth of pipes, and width of loading plate, on pipes’ mechanical and deformation performances. The numerical results show that with the increase of internal frictional angle, the ultimate bearing capacity of buried pipes increases remarkably. Optimum reinforcement effect can be obtained when buried depth equals to one fifth of the width of loading plate. Increasing buried depth of pipe can promote the ultimate bearing capacity evidently and alleviate deformation of pipes. Failure mode of buried pipes will change from deformation failure of pipe to foundation failure with the decrease of width of load plate. At the same time the ultimate bearing capacity will decrease. the deformation of buried pipes is closely relatated to reinforcement effect. The ratio of ultimate bearing capacities with and without reinforcement decreases with the increase of frictional angle and buried depth and the ratio increases firstly and then decreases with increase of width of load plate.

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更新日期/Last Update: 2019-01-30