不同颗粒级配的某火山灰的力学性质试验研究

Experimental investigation on mechanical properties of a volcanic ash with different grain size gradations

以吉林省靖宇县的红色火山灰为原材料,配制了5种不同级配的试样,通过比重、直剪和一维压缩试验测试了该火山灰材料的相对密度、剪切强度、压缩性等物理与力学特性,分析了颗粒级配对该火山灰的剪切和压缩力学特性的影响,为该材料的进一步应用提供参考。试验发现,所配制的火山灰试样的剪切特性与干砂土的抗剪性质类似,压缩特性都属于中压缩性土。

Using a red volcanic ash taken from Jingyu County of Jilin Province as a raw material,samples with five different grain gradations are prepared.The specific density is measured by specific density test and the shear strength and compressibility of volcanic ashes are tested by direct shear test and one-dimensional consolidation test.The influence of grain gradation on shear strength and compressibility of volcanic ashes is also analyzed for the application of volcanic ashes in engineering practice in the future.It is found that the shear characteristics of the red volcanic ash samples are similar to dry sand;and the samples all belong to medium compressible soil.