CAJ | 학술논문

粗颗粒含量对黏性-砂类混合土的强度特性有显著影响。通过抗剪强度试验研究了含砂量和含水率对混合土强度指标的影响及规律。试验结果表明：相同含水率条件下，随含砂量增加，凝聚力减小而内摩擦角增大，相同含砂量条件下，随含水率增加，凝聚力逐渐减小而内摩擦角则呈现峰值变化规律。基于试验结果，结合混合土孔隙结构理论，分析了含砂量和含水率对混合土剪切强度的影响机制，拟合出回归方程，提出了混合土剪切强度的界限含砂量。
조과립함량대점성-사류혼합토적강도특성유현저영향。통과항전강도시험연구료함사량화함수솔대혼합토강도지표적영향급규률。시험결과표명：상동함수솔조건하，수함사량증가，응취력감소이내마찰각증대，상동함사량조건하，수함수솔증가，응취력축점감소이내마찰각칙정현봉치변화규률。기우시험결과，결합혼합토공극결구이론，분석료함사량화함수솔대혼합토전절강도적영향궤제，의합출회귀방정，제출료혼합토전절강도적계한함사량。
Proportion of coarse particle plays an important role on strength properties of clay-sand mixtures. The effect of sand dosage and moisture content on shear strength of mixed soil is studied by shearing test. The results show that the cohesion decreases and the internal friction angle increases with the sand content increase under the same moisture content; the cohesion decreases while the internal friction angle shows a peak variation curve when the moisture content increase under the same sand content. Based on test results and theories of pore structure, the influence mechanism of moisture content and sand content on shear strength is analyzed, and regression equations are deduced, also the boundary sand content for the shear strength of mixed soil is proposed.