Lemin Ma
1
WEI GUO
2*The final, formatted version of the article will be published soon.
ORIGINAL RESEARCH article
Front. Built Environ.
Sec. Geotechnical Engineering
Volume 10 - 2024 |
doi: 10.3389/fbuil.2024.1330580
Numerical studies on low-strain integrity testing of cast-inplace pile
Provisionally accepted- 1 TianJin Survey Design Institute Group Co.,Ltd, Tianjin, China
- 2 Tianjin University, Tianjin, China
A series of in-situ tests were conducted using the low-strain integrity testing method to detect the defects of cast-in-place concrete piles. Numerical studies were conducted to observe the time-domain waveform along cast-in-place concrete piles with diameter expansion, diameter reduction and segregation defects. It is found the time-domain waveforms of the pile with the diameter expansion defects have second wave troughs after the first wavelength while those with diameter reduction and segregation defects have second wave crests. However, it is difficult to use amplitudes to directly determine the length, diameter and segregation degree of the defects. The second wavelengths could be used to identify the lengths of diameter reduction and segregation defects but it is hard to identify those of diameter expansion defects. The locations of diameter reduction and segregation defects could be determined through the time of second wave crests using the linear interpolation method, and those of diameter expansion defects could be determined through the time of second wave trough.
Keywords: Pile defect, Cast-in-place pile, Low-strain method, Pile integrity, Numerical Analysis
Received: 31 Oct 2023; Accepted: 04 Jul 2024.
Copyright: © 2024 Ma, DUAN, GUO and Ren. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
WEI GUO, Tianjin University, Tianjin, China
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