土工格栅加筋拉拔试验界面特性细观分析  被引量:11

Microscopic Analysis of Interface Characteristic of Geogrid and Soil Through Pull-out Test

在线阅读下载全文

作  者:赖汉江[1] 郑俊杰[1] 甘甜[1] 董友扣[1] 

机构地区:[1]华中科技大学土木工程与力学学院,湖北武汉430074

出  处:《土木工程与管理学报》2012年第4期45-49,54,共6页Journal of Civil Engineering and Management

基  金:国家自然科学基金(50908112);教育部留学回国人员科研启动基金(20091341);山西省交通建设科技项目(11-2-17)

摘  要:筋材与填土界面摩擦特性直接影响加筋效果,其技术指标在工程设计中占重要地位。采用离散元法软件PFC2D,通过双轴试验和格栅拉伸试验确定土颗粒和格栅参数,建立了不同界面的加筋土拉拔试验模型,从细观角度对土工格栅与不同填土界面特性进行分析。试验结果表明:格栅上侧水平位移量比格栅下侧大;拉拔过程中格栅两侧的剪切带宽度不相等,格栅下侧剪切带宽度较大;不同形状颗粒间咬合嵌锁程度不同,咬合嵌锁程度越大,其水平位移量越小,剪切带宽度越大。The interface characteristics between geo-grid and soil have a significant influence on the performance of reinforcement and are very important in design.Based on the Discrete Element Method software PFC2D,the parameters of soil and geo-grid are obtained by the biaxial test and geo-grid tensile test.The microscopic properties of the interface are investigated through the pull-out tests in different cases.The results show that the horizontal displacement above the geo-grid is larger than that below the geo-grid.The widths of shear band both above and below the geo-grid are different,and the widths above the geo-grid are greater than that below the geo-grid.The effects of interlock between the geo-grid and particles with various shapes are different.As the interlock effects increase,the horizontal displacement reduces and the width of shear band increases.

关 键 词:离散元法 土工格栅 拉拔试验 界面特性 

分 类 号:TU472.34[建筑科学—结构工程]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象