Study on anchorage performance of micro-sized flexible anchors in sandstone grottoes

被引：0
|
作者：
Pei Q. [1 ,2 ,3 ,4 ]
Bai Y. [1 ]
Cui K. [1 ]
Liu H. [2 ,3 ,4 ]
Cui H. [2 ,3 ,4 ]
Li L. [5 ]
机构：
[1] Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Gansu, Lanzhou
[2] Dunhuang Academy, Gansu, Dunhuang
[3] National Ancient Mural Protection Engineering Technology Research Center, Gansu, Dunhuang
[4] Research Center for Conservation of Cultural Relics of Dunhuang, Gansu, Dunhuang
[5] Chinese Academy of Cultural Heritage, Beijing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2023年 / 42卷 / 02期
关键词：
anchorage performance; cave temples; dangerous rock mass on grotto roof; deformation coordination; geotechnical engineering; micro-sized anchor;
D O I：
10.13722/j.cnki.jrme.2022.0287
中图分类号：
学科分类号：
摘要：
Aiming at the characteristics of rich cultural information，prominent deformation and high sensitivity to disturbance for grotto roof，the micro-sized flexible anchors with little disturbance and high concealment can meet the strong tensile resistance to flexible deformation and plastic state of anchorage system. In order to reveal the effectiveness and scientificity of micro-sized anchorage technology used in rock mass of flat roof of sandstone grottoes，as well as to evaluate the anchorage performance of different series of anchors under various operating conditions，GFRP and NPR anchors with a diameter of 8 mm were selected and implanted with different apertures，the strain gauge was laid at the rod body-paste interface，and then the field pull-out test was conducted in cyclic loading mode. The results show that micro-diameter GFRP and NPR anchors have good anchoring performance and interface deformation coordination，and GFRP anchors have better ductility and shear resistance. What's more，the anchoring effect performs best when the ratio of the diameter of the anchor span to that of the anchor rod reaches 2–2.25 times. The research provides a basis and reference for the application of micro-sized flexible anchors in the reinforcement engineering of rock mass of sandstone grottoes roof. © 2023 Academia Sinica. All rights reserved.
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页码：352 / 364
页数：12
相关论文
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