1. DGJ0811: Foundation Design Code. Shanghai Urban-Rural Construction and Traffic Committee, Shanghai (2010)
2. Fellenius, B.H.: Determining the resistance distribution in piles. Part 1: notes on shift of no-load reading and residual load. Geotech. News Mag. 20(2), 35–38 (2002)
3. Ishikawa, K., Ito, A., Ogura, H., Nagai, M.: Effect of strength and tip length of enlarged grouted base on bearing capacity of nodular pile. J. Struct. Constr. Eng. 76(670), 2107–2113 (2011). (in Japanese)
4. JGJ106: Technical Code for Testing of Building Foundation Piles. Ministry of Housing and Urban-Rural Development of the People’s Republic of China, Beijing (2014)
5. Karkee, M.B., Kanai, S., Horiguchi, T.: Quality assurance in bored PHC nodular piles through control of design capacity based on loading test data. In: Proceedings of the 7th International Conference and Exhibition, Piling and Deep Foundations, Vienna, Austria, vol. 1, no. 24, pp. 1–9 (1998)