4PEDRO SIMAO SECOE PINTO. New trends in design methods of pile foundations[R]//The Eighth Qian Jiahuan Lecture. Nanjing: Hohai University, 2010.
5TERZAGHI K. Theoretical soil mechanics[M]. New York: Wiley and Sons Inc., 1943.
6KHRISTOFOROV V, BEREZANTZE V GOLUBKOV V. Load bearing capacity and deformation of piled foundation[C]//Proceedings 5th International Conference Soil Mechanics and Foundation Engineering. Paris: [s. n.], 1961: 11--15.
7VESIC A S. Analysis of Ultimate Loads of Foundations. Journal of Soil Mechanics and Foundations Division, 1973, 99(SM1):45--73.
8LI] YARU, LIU HANLON DING XUANMINC et al. Field tests on bearing characteristics of X-section pile composite foundation[J]. Journal of Performance of Constructed Facilities, 2012, 26(2): 180--189.
9Han J,Sadik O,Robert L,et al.Numerical analysisof foundation columns to support widening of embank-ments[J].Computers and Geotechnics,2007,(34):435-448.
10Hiroshi M,Mitsuo N.Design and numerical analysisof road embankment with low improvement ratio deepmixing method[J].Geotechnical Engineering forTransportation Project,2004,126(2):1395-1402.