岩土工程学报2025，Vol.47Issue(z1)：21-25,5.DOI:10.11779/CJGE2025S10002
负泊松比土工格室-砂界面剪切性状研究
Investigation on the shear behavior of negative Poission's ratio geocell-sand interface
摘要
Abstract
This study designed and fabricated a honeycomb-structured auxetic(Negative Poisson's Ratio,NPR)geocell using 3D printing technology.The stress-displacement behavior at the interface between the NPR geocell and sand was investigated using a direct shear apparatus,with comparisons made to the interfacial shear characteristics of unreinforced sand and traditional(PPR)geocells.The research demonstrates that under low normal stress,the interface between NPR geocells and loose sand exhibits higher peak stress and pronounced dilatancy,whereas under higher normal stress,the stress-displacement behavior aligns with that of unreinforced sand and PPR geocell reinforced sand interfaces.For loose specimens,the interfacial strength of PPR geocells with sand is higher,while for dense specimens,the NPR geocell-sand interface shows greater strength.The type of geocell has limited influence on the residual state line,whereas the relative density significantly affects it,with loose specimens exhibiting lower residual strength compared to dense ones.The residual state line of loose specimens in the void ratio-normal stress plane presents a higher intercept.关键词
土工格室/负泊松比/剪切特性/加筋土Key words
geocell/negative poisson's ratio/shear behavior/reinforced soil分类
建筑与水利引用本文复制引用
孙逸飞,舒爽,张飞,高玉峰..负泊松比土工格室-砂界面剪切性状研究[J].岩土工程学报,2025,47(z1):21-25,5.基金项目
国家自然科学基金面上项目(52322808,51890912) （52322808,51890912）
