Experimental study of strain characteristics of constant-resistant large deformation anchor cable under static stretching condition
HE Manchao
L(U) Qian
TAO Zhigang
LI Zhaohua
ZHANG Haijiang
ZHANG Xiaoyun
PENG Yanyan
Abstract：In order to reveal the deformation law of the Constant-Resistance-Large-Deformation (CRLD) anchorage cable under tensile condition and to improve the anchorage effect of CRLD anchor in practical applications,the strain characteristics of the Constant-Resistance (CR) sleeve under tensile condition were investigated by choosing optimal anchorage mode with the method of combining theoretical analysis,laboratory experiments and in-situ tests.The laboratory experiment results show that the deformation behaviors of the CR sleeve are different in axial,radial and peripheral directions.A deformation process of compression-springback-recompression is followed in the axial direction;A tension-springback behavior is exhibited in the peripheral direction;In the radial direction,the CR sleeve underwent a tension and then a compression deformations.According to in-situ test performed at the Nanfen open-pit mine,it is found that the deformation of the CR degraded the anchorage effect and reduce the service life when the CR sleeve is used as anchored section.In the light of the above mentioned studies,by modifying the anchorage manner of the CRLD anchor,better anchorage effect could be obtained in the in-situ test performed at Badong dyehouse.
Keywords：anchoring forceenergy-absorbingstatic tensile teststrain characteristics
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 213-220 )