中南大学学报（自然科学版）2016，Vol.47Issue(12)：4153-4161,9.DOI:10.11817/j.issn.1672-7207.2016.12.026
不同孔隙度中心受压圆形薄板试样渗透特性试验研究
Experimental study on permeability parameters of circular thin plate specimens with different porosities under center pressure
摘要
Abstract
The circular thin plate specimens of different porosity were made by the method of controlling sand sizes. RSM−SY7 automatic ultrasonic measuring instrument with foundation piles and more cross-holes was used to measure and mark the values of porosity. Permeability test in the process of bend and deformation of thin circular plate specimens under axial compression was carried out by DDL600 electronic universal testing machine and self-developed infiltration testing device;the axial compressive strength and initial permeability of the circular thin plate specimens caused by porosity were investigated; time difference between axial load and peak of seepage flow caused by the porosity in deformation process of the circular thin plate bending specimen was explored;the permeability variation of circular thin plate specimens in the process of bending deflection was also studied. The results show that in the process of bending deflection of the circular thin plate, the permeability of the circular thin plate specimens in different porosities has a tendency of initial increase then decrease in general when the center of the circular thin plate specimens is compressed.The greater the porosity of the sample, the smaller the axial loadpeak value of Fmax and the initial permeability. When the porosity of the sample is becoming larger, the axial loadpeak value of Fmax emerges prior to the flow of Q peak. Conversely, the flow of Q peak emerges prior to the axial loadpeak value of Fmax.关键词
圆形薄板试样/渗透特性/弯曲变形/挠度/孔隙度Key words
circular thin plate specimens/permeability/bending deformation/deflection/porosity分类
矿业与冶金引用本文复制引用
张天军,任金虎,许鸿杰,潘红宇,尚宏波..不同孔隙度中心受压圆形薄板试样渗透特性试验研究[J].中南大学学报（自然科学版）,2016,47(12):4153-4161,9.基金项目
国家自然科学基金资助项目(51174158，51374168，51474172)(Projects(51174158,51374168,51474172) supported by the National Natural Science Foundation of China) （51174158，51374168，51474172）
