A study on particle breakage behavior during pile penetration process using acoustic emission source location

作     者：Wuwei Mao Shogo Aoyama Ikuo Towhata Wuwei Mao;Shogo Aoyama;Ikuo Towhata

作者机构：Department of Geotechnical EngineeringCollege of Civil EngineeringTongji UniversityShanghai 200092China Key Laboratory of Geotechnical and Underground EngineeringMinistry of EducationTongji UniversityShanghai 200092China Kiso-Jiban Consultants Co.Ltd.TokyoJapan Department of Civil EngineeringUniversity of TokyoTokyoJapan 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2020年第11卷第2期

页      面：413-427页

核心收录：

学科分类：08[工学] 0708[理学-地球物理学] 080104[工学-工程力学] 0815[工学-水利工程] 0704[理学-天文学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：sponsored by the Shanghai Sailing Program (Grant No. 18YF1424000) Shanghai Education Commission (Peak Discipline Construction Program, Grant Nos. 0200121005/052 & 2019010206) 

主　　题：Acoustic emission Source location Sand Particle breakage Pile 

摘      要：Particle breakage is a common occurrence in granular systems when the external stress exceeds the individual particle strength.A large number of experimental evidences suggested that particle breakage may significantly influence the soil *** the case of pile foundations,the subsoil below the pile tip experiences considerable high stress and consequently prone to *** to the lack of sufficient understanding on particle breakage mechanism,there is currently no consentaneous theoretical background for particle breakage analysis during the pile penetration *** study aims to clarify the location of particle breakage and its evolving characteristics with the aid of acoustic emission(AE)source location *** spatial distribution of AE hypocenters is interpreted to be associated with the mechanism of particle *** showed that the AE sources were not uniformly distributed,but concentrated within certain zones below the pile *** AE concentration zone was pushed downward with the advancing pile tip,and its distance from the real time pile tip position decreased after certain depth of pile *** location of particle breakage interpreted from AE source location was verified with posttest excavations and the insights on the particle breakage evolution zone were further discussed.