Quantitative Analysis of Low-strain Characteristics on Defective Piles with Constriction or Segregation
Zegen Wang*, Lin Chen, Zuocheng Xiao
Identifiers and Pagination:Year: 2015
First Page: 1
Last Page: 6
Publisher Id: TOCIEJ-9-1
Article History:Received Date: 3/7/2014
Revision Received Date: 18/9/2014
Acceptance Date: 18/9/2014
Electronic publication date: 25/2/2015
Collection year: 2015
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
As one of the most commonly used dynamic pile test technologies, low-strain reflected wave method is increasingly used in pile integrity testing. Currently, field test is only operated in the simple discriminant of defect, but is lack of the comprehension of stress reflection law of different degree defects, especially of the quantitative analysis of defect. To solve the problem, differences between reflected wave of different defective piles are compared, situations with different segregation degrees are simulated with finite element method. The degree of pile concrete segregation was quantificational analyzed in accordance with the theory that velocity-time curve is consistent, which combines the defect characteristics of the ratio between reflected wave peak and incident wave peak ,and the concrete modulus between segregation section and the normal. The construction of finite element method will be significant guidance for practical engineering.