摘要
采用室内干湿循环试验和超声波测试方法,利用工业CT扫描仪和非金属声波检测仪,对干湿循环后的压实膨胀土进行裂隙图像采集和声波测试,探讨纵波波速与裂隙率之间的关系。研究结果表明,在控制含水率一定的条件下,纵波波速随裂隙率的增大而逐渐减小。超声波在膨胀土中的传播速度可以间接反映膨胀土的内部结构,是一项重要的声学参数,因此可以利用波速的变化来反映膨胀土内部裂隙的发育情况。
The indoor dry wet cycling test and ultrasonic test method is used based on industrial CT scanners and non metal sonic detector compaction on wet and dry cycle of expansive soil fissure image acquisition and acoustic wave testing and to explore the relationship between the longitudinal wave velocity and rate of fracture. The results show that the longitudinal wave velocity decreases with the increase of the crack rate under certain conditions. The propagation velocity of ultrasonic wave in expansive soil can indirectly reflect the internal structure of expansive soil, and it is an important acoustic parameter which can he used to reflect the development of internal crack of expansive soil.
出处
《长沙理工大学学报（自然科学版）》
CAS
2016年第3期12-18,共7页
Journal of Changsha University of Science and Technology:Natural Science
基金
道路结构与材料交通部重点实验室开放基金资助项目(kfj110205)
关键词
道路工程
膨胀土
干湿循环试验
纵波波速
裂隙率
road engineering
expansive soil
drying-wetting cycles
longitudinal wave velocity
fracture rate
