Yielding performance of compact yielding anchor cable in working state:Analytical theory and experimental evaluation of yielding resistance enhancement effect  

作　　者：Zhenyu Wang Bo Wang Xinxin Guo Jinjin Li Zhenwang Ma 

机构地区：[1]State Key Laboratory of Intelligent Geotechnics and Tunnelling,Southwest Jiaotong University,Chengdu 610031,China [2]State Key Laboratory of Geohazard Prevention and Geoenvironmental Protection,Chengdu University of Technology,Chengdu 610059,China [3]China Design Group Co.,Ltd.,Nanjing 210001,China

出　　处：《International Journal of Mining Science and Technology》2025年第1期101-120,共20页矿业科学技术学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.U2468217,U2034205,and 52308391)。

摘　　要：To elucidate the yielding performance of compact yielding anchor cables in working state,a yielding mechanical model incorporating extrusion friction and fastening rotation under confining pressure is constructed.The yielding resistance enhancement effect(ω)caused by working environment constraints is evaluated through multi-layer composite sleeve hole expansion analysis,forming a theoretical framework for calculating the working yielding force.Laboratory and in-situ pull-out tests are conducted to determine the yielding performance and validate the analytical theory.The main conclusions are:(1)Yielding force and energy-release capacity increase withω,significantly outperforming the unconfined state.(2)In-situ tests under varying rockmass and geostress conditions(F1–F3)determine the yielding force increases to 183.4–290.1,204.0–290.8,and 235.0–327.1 kN.(3)The slight deviation(–12.5%to 6.2%)between the theoretical and measured yielding force confirms that the analytical theory effectively describes the working yielding performance.(4)ωincreases with higher geostress and improved rock mechanical properties,with initial geostress(σ_(0))and elastic modulus of surrounding rock(E_(3))identified as critical parameters.

关 键 词：Compact yielding anchor cables Working state Yielding resistance enhancement effect Yielding mechanical performance Pull-out test 

分 类 号：TU476[建筑科学—结构工程]