摘要
土的抗剪强度是土的重要力学指标之一,它代表土体在外力作用下抵抗剪切滑动的极限强度。直接快剪试验以其操作简单、原理明确被认为是用来检测土的抗剪强度的一种有效方法。基于直接快剪试验的原理,研究了在直接快剪试验过程中影响试验结果的各项因素,如土的均匀性、直剪速率、含水率与液性指数等。研究表明:土的均匀性、直剪速率、含水率与液性指数对直接快剪试验结果都有很大的影响。最后,针对这些问题,给出了相应的解决办法,完善了试验的具体操作过程,使试验数据更加合理可靠、接近样品的真实值。
The shear strength of soils is one of the important mechanical properties, which represents the ulti- mate strength of soils resisting the shear sliding under the external load. According to the simple opertations and clear principle, the direct shear test, as an effective method, is used to detect the shear strength of soils. Based on the basic principle of the direct shear test, the effects of the various factors, such as uniformity of soils, shear rate, moisture content, liquidity index were investigated. The research indicates that the uniformi- ty of soils, the shear rate, the moisture content, the liquidity index have great effects on the experimental re- sults. Finally, some suggestions were given, and the detailed operations and steps were modified. The experi- mental data obtained using the proposed method are reasonably and reliably.
出处
《结构工程师》
北大核心
2013年第2期168-171,共4页
Structural Engineers
关键词
土
直接快剪试验
抗剪强度
剪切速率
soils, direct shear test, shear strength, shear rate
