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人工合成透明土模拟天然土体,以研究土体内部位移场和渗透场等问题的可视化模型试验方法逐渐得到相关工程技术人员的认可与应用;然而,针对不同类型人工合成透明土的压缩变形特性的研究却相对较少。基于熔融石英砂和无定形二氧化硅这两种固体颗粒材料,开展不同孔隙液体、粒径范围及相对密实度等情况下的单向压缩试验;分析不同制配方法和制配材料所制配成的透明土材料的压缩变形特性,并与福建标准砂、Toyoura砂的单向压缩试验进行对比分析。同时,针对典型透明土土体在载荷板作用下的土体内部位移场进行了简要对比分析。试验结果表明,本文试验条件下,由蔗糖溶液制配的熔融石英砂透明土压缩性相对于由混合油及溴化钙溶液制配的压缩性更接近天然砂土;熔融石英砂相对于无定型二氧化硅更适合模拟天然砂土;与福建标准砂相比,透明土材料的压缩性相对较大,且目前模型试验中常用的0.5~1.0 mm粒径制配成的透明土压缩性相对更大,值得相关研究人员重视。
Artificial synthetic transparent soil simulation of natural soil, in order to study the internal displacement field and the infiltration field and other issues visual model test method has gradually been recognized by the relevant engineering and technical personnel and application; However, different types of synthetic transparent soil compression deformation characteristics The research is relatively small. Based on the two kinds of solid granular materials, fused silica sand and amorphous silica, the uniaxial compression tests under different pore liquids, particle size ranges and relative densities were carried out. The effects of different preparation methods and preparation materials Into a transparent soil material compression deformation characteristics, and Fujian standard sand, Toyoura sand unidirectional compression test comparative analysis. At the same time, a brief contrastive analysis is made of the displacement field of soil under the action of load plate for the typical transparent soils. The experimental results show that under the experimental conditions, the compressibility of fused silica sand prepared from sucrose solution is more compressive than that of natural sand mixed with the mixed oil and calcium bromide solution. Compared with amorphous sand, Silica is more suitable for simulating natural sand. Comparing with Fujian standard sand, the compressibility of transparent earth material is relatively large, and the compressibility of transparent earth made of 0.5-1.0 mm particle size commonly used in model tests is relatively more Large, it is worthy of the attention of relevant researchers.