Comparison of vane shear and fall cone strengths of soft marine clay
作者:
Tiesong Lu,
WilliamR. Bryant,
期刊:
Marine Georesources & Geotechnology
(Taylor Available online 1997)
卷期:
Volume 15,
issue 1
页码: 67-82
ISSN:1064-119X
年代: 1997
DOI:10.1080/10641199709379935
出版商: Taylor & Francis Group
关键词: fall cone;marine clay;miniature vane shear;pairedttest;regression analysis;undrained shear strength
数据来源: Taylor
摘要:
A total of 1,014 measures of sediment shear strengths were measured by means of miniature vane shear and fall cone tests on five gravity cores collected in Eckernfo‐erde Bay, Baltic Sea. Paired t test was used to compare the shear strengths measured by the two methods. It was found that fall cone strength calculated with Wood's K60value (0.29) overestimates the vane shear strength by 0.15 kPa (a=0.001) and the sample mean of the fall cone strength is 4.1% higher than the mean of the vane shear strength. However, fall cone strength calculated with Hansbo's K60value (0.24) underestimates the vane shear strength by 0.88 kPa (a = 0.001), and the sample mean of the fall cone strength is 13.8% less than the mean of the vane shear strength. Both calculated fall cone strengths are significantly different from the vane shear strength, with a p value of less than 0.001. Regression analysis of the Echernfoerde Bay data indicates that a new K60value is 0.275 with a confidence interval (a = 0.01) from 0.2704 to 0.2786. Paired t test shows that there is no significant difference between miniature vane shear and fall cone tests for these samples if the fall cone strength is calculated with K60=0.275.
点击下载:
PDF (722KB)
返 回