Geomechanics and Engineering

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Reliability analysis of piles based on proof vertical static load test

  • Dong, Xiaole (School of Resources and Environmental Engineering, Hefei University of Technology) ;
  • Tan, Xiaohui (School of Resources and Environmental Engineering, Hefei University of Technology) ;
  • Lin, Xin (School of Resources and Environmental Engineering, Hefei University of Technology) ;
  • Zhang, Xuejuan (School of Resources and Environmental Engineering, Hefei University of Technology) ;
  • Hou, Xiaoliang (School of Resources and Environmental Engineering, Hefei University of Technology) ;
  • Wu, Daoxiang (School of Resources and Environmental Engineering, Hefei University of Technology)
  • Received : 2021.09.22
  • Accepted : 2022.04.26
  • Published : 2022.06.10
⟨ Previous Next ⟩

Abstract

Most of the pile's vertical static load tests in construction sites are the proof load tests, which is difficult to accurately estimate the ultimate bearing capacity and analyze the reliability of piles. Therefore, a reliability analysis method based on the proof load-settlement (Q-s) data is proposed in this study. In this proposed method, a simple ultimate limit state function based on the hyperbolic model is established, where the random variables of reliability analysis include the model factor of the ultimate bearing capacity and the fitting parameters of the hyperbolic model. The model factor M = RuR / RuP is calculated based on the available destructive Q-s data, where the real value of the ultimate bearing capacity (RuR) is obtained by the complete destructive Q-s data; the predicted value of the ultimate bearing capacity (RuP) is obtained by the proof Q-s data, a part of the available destructive Q-s data, that before the predetermined load determined by the pile test report. The results demonstrate that the proposed method can easy and effectively perform the reliability analysis based on the proof Q-s data.

Keywords

Acknowledgement

This work was supported by the National Natural Science Foundation, China (41972278).

References

  1. Asem, P. and Gardoni, P. (2019), "A load-transfer function for the side resistance of drilled shafts in soft rock", Soils Found., 59, 1241-1259. https://doi.org/10.1016/j.sandf.2019.04.006.
  2. Chen, Y.J., Chang, H.W. and Kulhawy, F.H. (2008), "Evaluation of uplift interpretation criteria for drilled shaft capacity", J. Geotech. Geoenviron. Eng., 134, 1459-1468. https://doi.org/10.1061/(ASCE)1090-0241(2008)134:10(1459).
  3. Chen, Y.J., Liao, M.R., Lin, S.S., Huang, J.K. and Marcos, M.C.M. (2014), "Development of an integrated Web-based system with a pile load test database and pre-analyzed data", Geomech. Eng., 7(1), 37-53. https://doi.org/10.12989/gae.2014.7.1.037.
  4. Chinese Standard (2014), "Technical Code for Testing of Building Foundation Piles", JGJ106-2014. (in Chinese)
  5. Ching, J.Y. and Chen, J.R. (2010), "Predicting displacement of augered cast-in-place piles based on load test database", Struct. Saf., 32(6), 372-383. https://doi.org/10.1016/j.strusafe.2010.04.007.
  6. Davisson, M.T. (1972), "High Capacity Piles", Proceedings of the Soil Mechanics Lecture Series on Innovations in Foundation Construction, New York: American Society of Civil Engineers.
  7. Dithinde, M., Phoon, K.K., De, W.M. and Retief, J.V. (2011), "Characterization of model uncertainty in the static pile design Formula", J. Geotech. Geoenviron. Eng., 137(1), 70-85. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000401.
  8. Duncan, J.M. (2000), "Factors of Safety and Reliability in Geotechnical Engineering", J. Geotech. Geoenviron. Eng., 126(4), 307-316. https://doi.org/10.1061/(ASCE)1090-0241(2000)126:4(307).
  9. Fei, S.Z., Tan, X.H., Gong, W.P., Dong, X.L., Zha, F.S. and Xu, L. (2021), "Reliability analysis of strip footing under rainfall using KL-FORM", Geomech. Eng., 24(2), 167-178. https://doi.org/10.12989/gae.2021.24.2.167.
  10. Hirany, A. and Kulhawy, F.H. (2002), "On the Interpretation of Drilled Foundation Load Test Results", in: Deep Foundations 2002. American Society of Civil Engineers, Orlando, Florida, United States, 1018-1028. https://doi.org/10.1061/40601(256)71.
  11. Huffman, J.C., Strahler, A.W. and Stuedlein, A.W. (2015), "Reliability-based serviceability limit state design for immediate settlement of spread footings on clay", Soils Found., 55(4), 798-812. https://doi.org/10.1016/j.sandf.2015.06.012.
  12. Jia, L., Guo, J. and Yao, K. (2018), "In situ monitoring of the long-term settlement of high-fill subgrade", Adv. Civil Eng., 2018, 1347547. https://doi.org/10.1155/2018/1347547.
  13. Khorrami, R. and Derakhshani, A. (2019), "Estimation of ultimate bearing capacity of shallow foundations resting on cohesionless soils using a new hybrid M5'-GP model", Geomech. Eng., 19(2), 127-139. https://doi.org/10.12989/gae.2019.19.2.127.
  14. Kim, D. and Salgado, R. (2012), "Load and resistance factors for internal stability checks of mechanically stabilized earth walls", J. Geotech. Geoenviron. Eng., 138(8), 910-921. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000664.
  15. Kim, H.J. and Mission, J.L. (2011), "Probabilistic evaluation of economical factor of safety for the geotechnical design of pile axial load capacity", KSCE J. Civil Eng., 15(7), 1167-1176. https://doi.org/10.1007/s12205-011-0948-8.
  16. Lee, J., Kim, M. and Lee, S.H. (2009), "Reliability analysis and evaluation of LRFD resistance factors for CPT-based design of driven piles", Geomech. Eng., 1(1), 17-34. https://doi.org/10.12989/gae.2009.1.1.017.
  17. Luo, Z.Y., Dong, Q.H. and Gong, X.N. (2004), "Application of gray system theory to determining ultimate bearing capacity of a single pile", Rock Soil Mech., 2, 304-307. (in Chinese)
  18. Marsaglia, G., Tsang, W.W. and Wang, J.B. (2003), "Evaluating Kolmogorov's distribution", J. Stat. Software, 008(i18). https://doi.org/10.18637/jss.v008.i18.
  19. Misra, A. and Roberts, L.A. (2009), "Service limit state resistance factors for drilled shafts", Geotechnique, 59(1), 53-61. https://doi.org/ 10.1680/geot.2008.3605.
  20. O'Neil, M.W. and Reese, L.C. (1990), "Drilled shafts: Construction procedures and design methods", Tunn. Undergr. Sp. Tech., 5(1), 156-157. https://doi.org/10.1016/0886-7798(90)90101-O.
  21. O'Rourke, T.D. and Kulhawy, F.H. (1985), "Observations on load tests on drilled shafts", in: Drilled Piers & Caissons II. New York.
  22. Phoon, K.K. and Ching, J.Y. (2017), "Risk and Reliability in Geotechnical Engineering", CRC Press, Boca Raton. https://doi.org/10.1201/b17970.
  23. Phoon, K.K., Santoso, A. and Quek, S.T. (2010), "Probabilistic analysis of soil-water characteristic curves", J. Geotech. Geoenviron. Eng., 136(3), 445-455. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000222.
  24. Phoon, K.K. and Tang, C. (2019), "Effect of extrapolation on interpreted capacity and model statistics of steel H-piles", Georisk-Assessment and Management of Risk for Engineered Systems and Geohazards, 13(4), 291-302. https://doi.org/10.1080/17499518.2019.1652920.
  25. Rackwitz, R. and Fiessler, B. (1978), "Structural reliability under combined random load sequences", Comput. Struct., 9(5), 489-94. https://doi.org/10.1016/0045-7949(78)90046-9.
  26. Roberts, L.A. (2010), "Performance-Based Design of Deep Foundation Systems in Load and Resistance", Transportation Research Record, 2186, 29-37. https://doi.org/10.3141/2186-04.
  27. Saseendran, R. and Dodagoudar, G.R. (2020), "Reliability analysis of slopes stabilised with piles using response surface method", Geomech. Eng., 21(6), 513-525. https://doi.org/10.12989/gae.2020.21.6.513.
  28. Selig, E. and ISSMFE. (1985), "Axial pile loading test-Part 1: Static loading", Geotech. Test. J., 8(2), 79. https://doi.org/10.1520/GTJ10514J.
  29. Tan, X.H., Xie, Y., Hou, X.L., Li, P. and Wang, X. (2017), "Reliability Analysis of Shallow Foundations on Unsaturated Soils under Rainfall Infiltration", Geo-Risk 2017: Geotechnical Risk Assessment and Management, 588-597.
  30. Uzielli, M. and Mayne, P.W. (2012), "Load-displacement uncertainty of vertically loaded shallow footings on sands and effects on probabilistic settlement estimation", Georisk, 6(1), 50-69. https://doi.org/10.1080/17499518.2011.626333.
  31. Yang, X.L. and Li, W.T. (2017), "Reliability analysis of shallow tunnel with surface settlement", Geomech. Eng., 12(2), 313-326. https://doi.org/10.12989/gae.2017.12.2.313.
  32. Zhang, Q.Q., Liu, S.W., Zhang, S.M., Zhang, J. and Wang, K. (2016), "Simplified non-linear approaches for response of a single pile and pile groups considering progressive deformation of pile-soil system", Soils Found., 56(3), 473-484. https://doi.org/10.1007/s11771-013-1072-9.