CAJ | 학술논문

颗粒级配对于土体残余抗剪强度变化特征影响显著。本文以泄滩滑坡滑带土为研究对象，人为配置不同颗粒级配在浸泡不同饱和时间条件下进行室内残余剪切试验。结果表明，颗粒级配对于试样残余抗剪强度及其参数影响显著。不同粒组中，砾石组和粘粒组对于残余抗剪强度的变化规律影响最大。土体残余内摩擦角、内聚力与砾石含量呈正相关性；与粘粒含量呈负相关性。此外，饱和时间对于残余抗剪强度也有显著影响。饱和时间越长，残余抗剪强度及其参数越小，其变化速率也随之减小。饱和20天后，其数值趋于稳定。
과립급배대우토체잔여항전강도변화특정영향현저。본문이설탄활파활대토위연구대상，인위배치불동과립급배재침포불동포화시간조건하진행실내잔여전절시험。결과표명，과립급배대우시양잔여항전강도급기삼수영향현저。불동립조중，력석조화점립조대우잔여항전강도적변화규률영향최대。토체잔여내마찰각、내취력여력석함량정정상관성；여점립함량정부상관성。차외，포화시간대우잔여항전강도야유현저영향。포화시간월장，잔여항전강도급기삼수월소，기변화속솔야수지감소。포화20천후，기수치추우은정。
Particle size distribution has significant influence on the residual strength of soil. This study aims to investigate the particle size distribution efect on slip soils from XIETAN landslide by testing the residual strength of artificial specimens with diverse particle size distribution and different saturation time. It was found that the residual strength and its parameters of slip soils are remarkably affected by grain composition, particularly the gravel fraction and clay fraction. The residual friction angle (r’) and residual cohesion (cr’) of samples have a positive correlation with gravel fraction and a negative relationship with clay content. In addition, saturation time also has a marked impact on residual strength values of slip soils. The residual strength and parameters are continuously lowered with longer saturation time in a slower changing rate. However, strength values of slip soils appear stable after 20 days.