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Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 396428, 7 pages
http://dx.doi.org/10.1155/2014/396428
Research Article

Determination Permeability Coefficient from Piezocone

1Department of Civil Engineering, Anhui University of Science and Technology, Huainan Anhui 232001, China
2Institute of Geotechnical Engineering, Southeast University, Nanjing, Jiangsu 210096, China

Received 8 January 2014; Accepted 27 March 2014; Published 27 April 2014

Academic Editor: John W. Gillespie

Copyright © 2014 Qiang Wang and LiYuan Tong. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The permeability coefficient of soil profile is one of the problems concerned by engineers, and the determination of permeability coefficient method mainly relies on the laboratory permeability test and field pumping test, but these tests are time-consuming and inefficient, and especially the permeability coefficient of soil under the condition of partial drainage was difficult to determine; in this paper, the modern digital CPTU technology was used. Dimensional permeability was defined by using the dimensionless normalized cone tip resistance , friction factor , and pore pressure ratio , these parameters enable plots of - , - , - to be contoured and hence for permeability coefficient. The relationship has been applied to Nanjing 4th Yangtze river bridge, and compared with laboratory penetration test. The results indicate that the method can accurately determine the permeability coefficient of soil under partial drainage condition and provide the theoretical basis for engineering application.