孔隙液体对玻璃砂透明土强度特性影响研究  

Effect of pore fluid on strength properties of transparent soil

作　　者：孔纲强[1,2] 孙学谨 李辉[1,2] 曹兆虎[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学土木与交通学院,江苏南京210098

出　　处：《岩土工程学报》2016年第2期377-384,共8页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(51278170;51478165)

摘　　要：玻璃砂透明土由一种玻璃砂(或称熔融石英砂)和与之折射率相一致的孔隙液体制配而成的新型人工合成透明土,为岩土工程可视化模型试验方法提供技术支撑。开展混合油、溴化钙溶液、蔗糖溶液以及纯净水等不同孔隙液体所制配成的透明土的三轴固结排水(CD)试验,分析该新型透明土材料的应力–应变关系曲线、体积变形等力学特性以及推导其邓肯–张模型参数。试验结果表明,不同孔隙液体所制配成的透明土试样力学特性规律相似、数值上有所差异;由蔗糖溶液制配成的透明土强度最大、由混合油制配成的透明土强度最小、由溴化钙溶液制配成的透明土强度值与水样熔融石英砂的强度相对更接近。A kind of new transparent soil, which is made of glass sand（also called as baked quartz） and pore fluid with the same refraction index, is used for geotechnical engineering visualization model tests. Based on the consolidated drained（CD） triaxial test method, the mechanical properties of transparent soil with different pore fluids（mixed oil, calcium bromide solution, sucrose solution and pure water） are investigated. The stress-strain curves, volume change and friction angles are measured and analyzed. The laboratory test results show that the mechanical properties of the transparent soil samples with different pore fluids are similar, while the values have some difference. Under the experimental conditions of this study, the strength of the transparent soil with sucrose solution pore fluid is the largest, at with mixed oil pore fluid is the smallest, and that with calcium bromide solution pore fluid is close to that with water pore fluid.

关 键 词：透明土 孔隙液体 强度特性 三轴试验 

分 类 号：TU47[建筑科学—结构工程]