摘要
红土样中加入土壤强固剂可以显著改善土体性能 ,提高强度 ,减小变形。其加固机理可用等效压力和等效剪应变的概念来解释 ,加固实质就是增强了土颗粒之间的连接力和摩擦力 ,加固效果相当于提高了作用于试样的垂直压力和破坏剪应力 ,减小了破坏剪应变 ,可以用加固效果系数来衡量。各应力 -应变特性参数随着垂直压力的增大而增大 ,但增大的程度逐渐减小 ,强度加固效果系数和同水平剪应变加固效果系数与垂直压力呈反比 。
The properties of laterite sample will be improved observably that the strength grows and deformation decreases when the soil-solidified additive is put into the sample. As a result of solidfying, the cohesion and friction among earth particles are increased. The mechanism can be described by means of equal stress and equal shearing strain. The strengthening, which can be estimated by strengthening coefficient, is equivalent to raise the vertical pressure, to improve the broken shearing stress and to decrease the broken shearing strain. The value of indexes of stress-strain curves will grow but the growth will reduce gradually when the vertical force increases. The strengthening coefficient of broken shearing strain is proportional to the vertical force, but the strengthening coefficient and shearing strain with the same stress level is reverse to the vertical force.
出处
《水文地质工程地质》
CAS
CSCD
2002年第5期4-6,18,共4页
Hydrogeology & Engineering Geology
基金
国家自然科学基金资助项目 ( 5 996 80 0 2 )
关键词
力学特性
红土
土壤强固剂
加固机理
加固效果
等效压力
等效剪应变
laterite
soil-solidified additive
the strengthening mechanics
the strengthening effect
standardization
