文献类型：期刊文献

中文题名：静力拉伸下恒阻大变形锚索应变特征实验研究

英文题名：Experimental study of strain characteristics of constant-resistant large deformation anchor cable under static stretching condition

作者：何满潮[1,2];吕谦[1,2];陶志刚[1,2,3];李兆华[1,2];张海江[3];张晓云[3];彭岩岩[3]

机构：[1]中国矿业大学(北京)力学与建筑工程学院;[2]深部岩土力学与地下工程国家重点实验室;[3]绍兴文理学院岩石力学与地质灾害实验中心

年份：2018

卷号：0

期号：2

起止页码：213

中文期刊名：中国矿业大学学报

外文期刊名：Journal of China University of Mining & Technology

收录：CSTPCD、、EI(收录号：20181204922168)、北大核心2017、Scopus(收录号：2-s2.0-85043992860)、CSCD2017_2018、北大核心、CSCD

基金：国家自然科学基金项目(41502323)

语种：中文

中文关键词：锚固力;吸能锚杆;静力拉伸试验;应变特征

外文关键词：anchoring force;energy-absorbing;static tensile test;strain characteristics

中文摘要：为了揭示恒阻大变形锚索在拉伸条件下恒阻器的变形规律,提高恒阻大变形锚索现场锚固效果,采用理论分析、室内实验以及现场实践相结合的方法,研究了恒阻大变形锚索的恒阻器作为锚固段时拉伸应变特征.实验结果表明:恒阻器的变形分为轴向、圆周方向、径向3个不同方向的变形,其中轴向变形的规律为压缩-回弹-再压缩变形;圆周方向的变形规律为拉伸-回弹变形;径向的变形规律为拉伸-压缩变形.现场实践表明:在南芬露天矿边坡安装监测点时,以恒阻器为锚固段,当恒阻器发生变形会影响现场的锚固效果,且减少锚索使用寿命.在巴东染坊边坡上安装监测点时,改变恒阻大变形锚索的锚固方式,取得良好的锚固效果.

外文摘要：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 isfound 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.