RT Journal T1 Modified calculation method of shaft friction for driven pile considering particle size effect A1 Peizhi ZHUANG,Yingchao ZHANG,Xiuguang SONG,He YANG,Zhicheng GUO,Yan HU PB Journal of Shandong University(Engineering Science) FD 2021-10-20 YR 2021 JF Journal of Shandong University(Engineering Science) JO Journal of Shandong University(Engineering Science) VO 51 IS 5 SP 8 DO 10.6040/j.issn.1672-3961.0.2021.161 K1 ;micropile;shaft friction;particle size effect;sand;cavity expansion theory LK {http://gxbwk.njournal.sdu.edu.cn/EN/article/article_2065.shtml}