Fig. 1. Improved section of PHC pile (Choi, 2014)
Fig. 2. Construction method of SDA (Cho, 2007)
Fig. 3. Construction step (Choi, 2014)
Fig. 4. Outer wall of underground parking lot (Ryu, 2015)
Fig. 5. The conceptual diagram of the additional wall
Fig. 6. Borehole positions and soil profile
Fig. 9. Load-displacement curve of group pile (TP-G)
Fig. 10. Axial load distribution of group pile (TP-G)
Fig. 11. Skin friction and end bearing of group pile (TP-G)
Fig. 12. Load-displacement curve of single pile (TP-S)
Fig. 13. Axial load distribution of single pile (TP-S)
Fig. 14. Skin friction and end bearing of single pile (TP-S)
Fig. 8. Details of sensor installation
Fig. 7. Layout of test pile
Table 1. B.S.T results
Table 2. P.M.T result
Table 3. Results of static axial compressive load test
Table 4. Results of axial load transfer test
Table 5. Comparisons of unit end bearing values
Table 6. Suggested formular by test values
References
- ASTM (1994), "Standard Test Method for Piles Under Static Axial Compressive Load", American Society for Testing and Materials, ASTM D 1143-81.
- Choi, J. P. (2014), Study on the Economic Analysis of Retaining PHC-W Method Improved High Strength Pile, Pusan National Univ. Master's Thesis, pp. 6-25.
- Cho, C. H. (2007), "Injected Precast Pile Methof", ENGINEER BOOK, Seoul, pp.28-31.
- Davisson, M. T. (1972), "High Capacity Piles", Proceedings, Lecture Series, Innovations in Foundation Construction, ASCE, Illinois Section, Chicago, March 22, pp.81-112.
- Kim, J. S. (2003), "A Study on the Estimation of Bearing Capacity of SIP Pile embedded in Weathered-Granite Layer", Hanyang Univ. Doctor's Thesis.
- Lee, W. J. (2000), "Measurement of pile load transfer using fiberoptic sensor and characteristics of bored precast pile bearing capacity, Korea Univ. Doctor's Thesis.
- Ryu, S. H. (2015), Permanent Basement Wall Convergence Method Using a PHC Pile, Journal of the Korea Convergence Socity, Vol. 6, No.6, pp.163-169. https://doi.org/10.15207/JKCS.2015.6.6.163
- Terzaghi, K. and Peck, R. B. (1967), "Settlement of Point Foundation: Settlement of Floating Pile Foundation, Soil Mechanics in Engineering Practice, 2nd Edition, Hohn Wiley & Sons, New York.
- Woo, J. Y., Yoo, C. K., Kim, S. S., and Choi, Y. K. (2018), Analysis on the Bending and Shear Strength Testing for additional Walls Constructed by PHC-W Piles, Journal of the Korea Geotechnical Society, Vol.34, No.12, pp.7-17, ISSN 1229-2427. https://doi.org/10.7843/KGS.2018.34.12.7