期刊
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
卷 46, 期 1, 页码 47-67出版社
WILEY
DOI: 10.1002/nag.3290
关键词
distributed sensor technique; low strain integrity test; pipe pile; torsional vibration; velocity response
资金
- National Natural Science Foundation of China [51878634, 52178371, 52178321, 51878185]
- Outstanding Youth Project ofNatural Science Foundation of Zhejiang Province [LR21E080005]
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
- Fundamental Research Founds for National University, China University of Geosciences (Wuhan) [CUGGC09, 1910491T04]
- Innovative Research Team Program of Guangxi Natural Science Foundation [2016GXNSFGA380008]
- China Postdoctoral Science Foundation [2020M673093]
- Systematic Project of Guangxi Key Laboratory of Disaster Prevention and Structural Safety [2019ZDK047, 2019ZDK049]
This article introduces distributed torsional LSIT as a new method for pile testing, which is more suitable for long pile testing compared to traditional methods. Through experimental validation and application demonstrations, the method shows significant advantages in identifying pile defects.
Low strain integrity tests (LSITs) are the most popular non-destructive methods for pile testing. However, traditional LSITs have encountered unprecedented challenges as the need for long pile and existing pile testing keeps multiplying. Compared to traditional longitudinal excitations, the torsional wave is less influenced by the velocity attenuation effect and can be subjected at the pile shaft for existing piles. Distributed torsional LSIT is proposed in this article with the presentation of the corresponding analytical solutions that exhibiting the velocity responses along the pile shaft. The solution is verified with previous simplified theoretical and rigorous finite element method (FEM) answers. At the end, the application of this method is exhibited through the identification of necking and concrete segregation defects on pipe piles, which shows the advantage of this method on long pile testing.
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