Pullout resistance of granular anchors in clay for undrained condition

作     者：O'Kelly, B. C. Brinkgreve, R. B. J. Sivakumar, V. 

作者机构：Univ Dublin Trinity Coll Dept Civil Struct & Environm Engn Dublin 2 Ireland Delft Univ Technol Geoengn Sect Delft Netherlands Plaxis Bv Res & Projects NL-2628 XK Delft Netherlands Queens Univ Belfast Geotech Engn SPACE Belfast Antrim North Ireland 

出 版 物：《SOILS AND FOUNDATIONS》 (土壤与基础)

年 卷 期：2014年第54卷第6期

页      面：1145-1158页

核心收录：

学科分类：081401[工学-岩土工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0814[工学-土木工程] 

基　　金：Marie Curie IAPP project NOTES [PIAP-GA-2008-230663] 

主　　题：Bulging capacity Failure Granular anchor Uplift Ultimate capacity 

摘      要：Granular anchors (GAs) can resist pullout/uplift forces, compression forces and also provide ground improvement. Under pullout loading, a centrally located tendon transtmits the applied surface load to the base of the granular column via a base plate attachment, which compresses the column causing significant dilation of the granular material to occur, thereby forming the anchor. This paper describes a program of field testing and numerical modelling of the pullout resistance of GA installations in overconsolidated clay for the undrained (short term) condition. Pertinent modes of failure are identified for different column length to diameter (LID) ratios. The applied pullout load is resisted in shaft capacity for short GAs or in end-bulging of the granular column for long GAs. In other words, the failure mode is dependent on the column L/D ratio. A novel modification in which the conventional flat base-plate is replaced by a suction cup was shown to significantly improve the undrained ultimate pullout capacity of short GAs. (C) 2014 The Japanese Geotechnical Society. Production and hosting by Elsevier B.V. All rights reserved.