期刊论文

Numerical Simulation of Pullout Test Value of Geogrid Reinforced Expansive Soil

中文

公路交通科技

1002-0268

2020

37

02

31-39

10.3969/j.issn.1002-0268.2020.02.005

50978035:国家自然科学基金 51608053:国家自然科学基金 kfj100208:道路结构与材料交通行业重点实验室开放基金

本校为第一机构

单向土工格栅加筋膨胀土技术在治理膨胀土地区堑坡坍滑方面得到了成功的运用,该技术的关键是筋土间的相互作用力,需通过拉拔试验获得。国内外不少学者尝试用数值模拟来获取土中加筋的拉拔力,而模拟所需参数大多采用经验估算或文献获得。由于一些参数取值与实际不符,导致模拟结果与工程实测值有不小误差。目前通过完成系统试验获得所需参数后再做数值模拟的不多,而先做加筋膨胀土拉拔试验,再对其数值模拟的更鲜见。首先用直剪试验获得了膨胀土的抗剪强度指标,然后用自行研发的大型数控拉拔试验系统完成了单向土工格栅加筋膨胀土拉拔试验,取得了数值模拟所需单位面积刚度系数、筋土界面黏结强度及...

The technology of uniaxial geogrid reinforced expansive soil has been successfully applied in the treatment of cutting slope collapse in the expansive soil area. The key of the technology is the interaction between reinforcement and soil,which needs to be obtained through pullout test. Many scholars at home and abroad have tried to use numerical simulation to obtain the pullout force of the reinforcement in the soil,and most of the parameters required for simulation are obtained by empirical estimation or literature. Because some parameters are not consistent with the actual values,there is la...