Soil Damping Effects on Integrity Test of Piles
DOI:
https://doi.org/10.11113/jt.v72.4020Keywords:
Pile, integrity, soil, damping.Abstract
The effects of surrounding soil on pile integrity test results are still not precisely quantified despite its influence on test output. It is usually difficult to assess the integrity of piles socketed in hard soil strata due to soil damping effects. A method of calculating soil damping effects on stress wave force and velocity values during pile integrity test is presented. Theoretical model based on numerical solution of wave equation was formulated. This model incorporates soil resistance effects on wave propagation in piles. Results generated from the proposed model was compared with PIT-S software, which simulates low strain waves propagation in piles, assuming pile cast in very dense granular soil. The generated Force-Velocity curves were found to be similar comparing both methods; however, some variations were observed at pile toe due to the different procedures used for soil reaction estimation. Furthermore, the model produced results were compared with real in-situ pile integrity test and PIT-S results. The model had showed better prediction of pile toe received signal compared to PIT-S software.
References
American Society of Testing and Materials (ASTM). 2013. Section 4, Vol. 04.09, ASTM D5882. Standard. Test Method for Low Strain Impact Integrity Testing of Deep Foundations.
Massoudi, N., Teferra, W., April. 2004. Non-Destructive Testing of Piles Using the Low Strain Integrity Method. Proceedings of the Fifth International Conference on Case Histories in Geotechnical Engineering: New York, USA, NY.
Paquet, J. 1992. Pile integrity Testing – The CEBTP Reflectogram, Piling, European practice and worldwide trends. Proceedings of a conference organized by Institution of Civil Engineers. London, England.
Rausche, F. 2004. Non-Destructive Evaluation of Deep Foundations. Proceedings of the Fifth International Conference on Case Histories in Geotechnical Engineering. New York, USA.
Liang, L., Beim, J., W. 2008. Effect of Soil Resistance on the Low Strain Mobility Response of Piles using Impulse Transient Response Method. Proceedings of the Eighth International Conference on the Application of Stress Wave Theory to Piles. Lisbon, Portugal.
Kraft, L., M., Ray, R., P., and Kagawa, T. 1981. Theoretical t-z curves, Journal Geotechnical Engineering Division. Proceedings Paper 16653. American Society of Civil Engineers. Vol 107(GT11).
Amick, H., and Gendreau, M. 2000. Construction Vibrations and Their Impact on Vibration-Sensitive Facilities. Proceedings ASCE Construction Congress 6, Orlando Florida. 1–10.
Kagawa, T. 1991. Dynamic Soil Reaction to Axially Loaded Piles. Journal of Geotechnical Engineering. 177(7).
GRL Shaft Integrity Report No. 095017, March 2009, Qafco-5 Project, Mesaied, Qatar.
Downloads
Published
Issue
Section
License
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.
