考虑颗粒破碎的钙质砂压缩特性试验研究

针对钙质砂的颗粒破碎与压缩变形问题,开展了不同含水率条件下的钙质砂侧限压缩试验,分析了粒径、含水率对颗粒破碎和压缩变形的影响规律。试验结果表明:粒径越大,钙质砂颗粒越容易破碎,由此引发的形变越大;不同含水率条件下,颗粒破碎机制不同,当处于低含水率条件下时,颗粒破碎随含水率的增加而加剧,当处于高含水率条件下时,颗粒破碎随含水率的增加而减弱;含水率对压缩变形影响显著,不同含水率条件下的钙质砂压缩性不同。

Compression feature of calcareous sand considering particle breakage

Aiming at the particle breakage and compression deformation of calcareous sand,we carried out the calcareous sand compression test under different water content,and analyzed the influential rules of the particle size and water content on particle breakage and compression deformation.The experimental results show that the larger the particle size is,the more easily the calcareous sand particles fracture,and the bigger deformation occurs after compression;particle breakage mechanism is different under various water content,i.e.,the particle breakage intensifies with the increase of water content under the condition of low water content while the particle breakage weakens with the increase of water content under the condition of high water content;the water content has a significant impact on compression deformation and calcareous sand has different compressibility under different water content level.