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Volume 41 Issue 10
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KUANG Zheng, ZHANG Ming-yi, BAI Xiao-yu, WANG Yong-hong, YAN Nan, ZHU Lei. Field tests on mechanics and deformation properties of GFRP anti-floating anchors in decomposed rock foundation[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(10): 1882-1892. DOI: 10.11779/CJGE201910012
Citation: KUANG Zheng, ZHANG Ming-yi, BAI Xiao-yu, WANG Yong-hong, YAN Nan, ZHU Lei. Field tests on mechanics and deformation properties of GFRP anti-floating anchors in decomposed rock foundation[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(10): 1882-1892. DOI: 10.11779/CJGE201910012
shu

Field tests on mechanics and deformation properties of GFRP anti-floating anchors in decomposed rock foundation

  • 1. College of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China;
    2. College of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China

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  • Received Date: August 27, 2018
  • Published Date: October 24, 2019
    Graphical Abstract
    • Abstract
  • Through the field pullout destruction tests on 10 GFRP anti-floating anchors using the fiber bragg grating sensing technology, the bearing capacity and deformation properties of the GFRP anti-floating anchors in decomposed rock foundation are investigated. The test results show that the load-displacement difference curve of the anchor body and anchorage body of the GFRP anchors in the slip failure model is higher than that in the rupture failure model. The load-displacement difference curve of the anchor body and anchorage body with the anchorage length which is close to the critical one rises steadily. Increasing the diameter of the anchor body is beneficial for improving the bearing capacity of anchors, limiting the displacement of the anchor body and reducing their displacement difference. Additionally, the distribution of the axial stress on the cross-section of the anchor body, which decreases along the anchorage length, shows a reversed S form along the direction of anchorage length. The shear stress of the axial interface increases firstly and then decreases along the direction of anchorage length, and it transfers from the first interface to the second interface with an oblique upward direction. Finally, the displacement difference of the anchor body and anchorage body, calculated by the simplified model for the distribution of the shear stress, is similar to that of the GFRP anchors in the slip failure model. The research results may provide the theoretical foundation for the application of GFRP anchors.
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