CAJ | 학술논문

文章通过试验研究了宁南地区红黏土物理力学性质及胀缩性 ,结果表明 ,该红黏土的液、塑限较低 ,具有一定的胀缩性 ;分析了含水率 w与黏聚力c、内摩擦角φ、基质吸力S、膨胀力 P的关系 ,发现 S、P与w之间呈良好的指数函数关系 ,c与w呈幂函数关系 ,φ与w呈线性关系 ;通过拟合得到适用于宁南地区红黏土的非饱和强度公式 ,该公式通过膨胀力来表示由吸力引起的强度部分 ,避开了量测基质吸力的麻烦 ,以一种相对简单有效的方式来确定非饱和红黏土的抗剪强度.
문장통과시험연구료저남지구홍점토물리역학성질급창축성 ,결과표명 ,해홍점토적액、소한교저 ,구유일정적창축성 ;분석료함수솔 w여점취력c、내마찰각φ、기질흡력S、팽창력 P적관계 ,발현 S、P여w지간정량호적지수함수관계 ,c여w정멱함수관계 ,φ여w정선성관계 ;통과의합득도괄용우저남지구홍점토적비포화강도공식 ,해공식통과팽창력래표시유흡력인기적강도부분 ,피개료량측기질흡력적마번 ,이일충상대간단유효적방식래학정비포화홍점토적항전강도.
Based on a series of laboratory experiment ,this paper presents the physical property and shrink-swell property of the red clay in southern region of Ningxia .The result shows that it has low liquid and plastic limits and certain shrink-swell ability .The interrelation between water content wand cohesion c ,angle of internal friction φ,matric suction S ,expansion-pressure P is analyzed .Good index functions between S ,P and w ,a power function between cand w ,a linear relation between φand ware found .And the strength formula which is appropriate for the unsaturated red clay in southern region of Ningxia is obtained .This formula avoids the problem of measuring the matric suction and computes the shear strength of unsaturated red clay in a simple and efficient way .