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针对不同加砂比例的云南红土,在相应最优含水率及最大干密度的初始条件下,采用土工试验与相关理论研究相结合的方法,运用Excel分析试验数据,揭示干湿循环作用与加砂红土物理力学特性变化之间的关系。结果表明:在干湿循环过程中,不同加砂比例的红土比重均呈先上升后下降的趋势,干密度均呈上升趋势,抗剪强度及抗剪强度参数均呈下降趋势,并最终都在循环10次左右趋于稳定。在干湿循环次数一定条件下,加砂比例越大的红土,其黏粒降幅越小,粉粒和砂粒增幅也越小,裂隙数量越少,土样越密实。抗剪强度及抗剪强度参数降幅最大的是加砂比例为15%的红土,降幅最小的是加砂比例为10%的红土。
According to the initial conditions of Yunnan red soil with different proportion of sanding, using the method of combining geotechnical test with relevant theoretical research, using Excel to analyze the experimental data to reveal the effect of wetting and drying cycle and adding sand The relationship between changes of physical and mechanical properties of laterite. The results showed that the proportion of red clay with different proportion of sanding increased first and then decreased, the dry density increased, the shear strength and shear strength parameters showed a downward trend Around 10 times to stabilize. Under the conditions of the number of dry-wet cycles, the larger the proportion of sand, the smaller the decrease of clay particles, the smaller the increase of silt and grit, the smaller the number of cracks and the denser soil. The largest decrease of the shear strength and shear strength parameters is the laterite with 15% sand addition, the smallest decrease is the laterite with 10% sand addition.