摘要
为研究击实黏性土断裂韧度,研制了土体断裂韧度测试新仪器,通过新仪器对黏性土进行了断裂韧度测试,讨论了试验方法的合理性;并结合前人的研究成果探讨了土体断裂韧度与抗拉强度之间的关系。结果表明,击实黏性土中的裂缝扩展规律符合线弹性断裂特性,可采用线弹性断裂理论对其进行研究;击实黏性土断裂韧度与抗拉强度之间存在线性关系;但土体颗粒性质、颗粒机配、试样含水量、试验方法等均对土体断裂韧度有影响,需进行更深入的研究。
In order to research the fracture toughness of compacted clay, a new apparatus of fracturing test is proposed. Based on the new apparatus, the fracture toughness of the clay were tested, the rationality of the test methods was discussed. Combined with the results of previous studies, the relationship between the fracture tough- ness and the tensile strength was discussed. The results shown that, the crack propagation characteristic of the com- pacted clay matched with the linear elastic fracture, research the crack propagation by Linear Fracture Mechanics is apposited. The linear relationship between the fracture toughness and the tensile strength was found. But the nature of the soil particles, the particle curves, the sample water content, the test methods and others could in impact the fracture toughness, which need for more research.
出处
《科学技术与工程》
北大核心
2015年第23期193-197,共5页
Science Technology and Engineering
基金
重庆交通大学研究生教育创新基金项目(20120101)
重庆市研究生科研创新项目(CYS14166)资助
关键词
黏土
断裂韧度
三点弯曲试验
土体断裂试验仪
抗拉强度
clay
fracture toughness
three-point bending beam test
soil fracture apparatus
ten- sile strength
作者简介
邱珍锋（1988－），男，江西信丰人，博士研究生。研究方向：水利工程。E-mail：qiuzhenfeng3012@163．com。
