论文部分内容阅读
为了把电阻率法引入水泥土的损伤研究中,首先把水泥土试块浸泡在清水、生活污水和造纸厂污水中,待龄期为90 d时进行无侧限抗压强度试验,并结合照片将试验过程得到的电流-应变曲线和应力-应变曲线进行了对比分析,然后以“有效电流”作为度量损伤的基准,通过统计得到了水泥土损伤模型,最后进行了归一化。研究表明,电流的变化易于测量,电流随着应变的增加而有规律的变化;电流-应变曲线与应力-应变曲线相互对应,都可以划分为4个阶段,这4个阶段很好地描述了水泥土损伤发展的全过程;本模型将全应变范围都统一成一个4次多项式方程,且方程形式与水泥类型、污染类型无关;这充分说明借助电流的变化来反映水泥土的结构损伤过程完全可行。
In order to introduce the resistivity method into the study of damage of cement soil, the cement soil test block is immersed in clean water, domestic sewage and paper mill wastewater first, and then unconfined compressive strength test is carried out at the age of 90 d The current-strain curve and the stress-strain curve obtained from the test are compared and analyzed, and then the “effective current” is taken as the benchmark to measure the damage. The damage model of cement soil is obtained through statistics and the normalization is finally carried out. The results show that the change of current is easy to measure and the current changes regularly with the increase of strain. The current-strain curve and the stress-strain curve correspond to each other and can be divided into four stages, which are well described The whole process of cement soil damage development; the model will be unified into a strain range quadratic polynomial equation, and the equation type and cement type, type of pollution has nothing to do; fully illustrate the changes in current to reflect the structural damage of cement soil completely feasible.