A Reasonable Stretching Mode for Pressure-Dispersive Grout Anchor with U-Shaped Load-Bearing Bodies in Soil Ground

Abstract:

With the development of supporting technology, more and more pressure-dispersive anchor systems are applied in civil and mining engineering recently. In this anchor system, unbonded steel strands are used to disperse the external load to load-bearing bodies at different locations, and the load is transferred through the compressing action between the load-bearing body and cement mortar. It has obvious technique advantage as a permanent anchor system. However, the stretching mode for pressure-dispersive grout anchor is still not clear in actual engineering practice. In this paper, there are 3 common types of stretching mode for pressure-dispersive grout anchor with u-shaped load-bearing bodies in soil ground are analyzed by FEM (finite element method) and the reasonable one is suggested. Ulteriorly, the loading formulas are deduced respectively for the pressure-dispersive grout anchor with 2 or 3 load-bearing bodies, which will be used conveniently in practice.

• Periodical: Applied Mechanics and Materials (Volume 441)
• Pages: 506-513
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.441.506
• Online since: December 2013
• Authors: Xi Yuan Sun, Chao Yang Heng, Zhi Zhou
• Keywords: Finite Element Method (FEM), Loading Formula, Pressure-Dispersive Grout Anchor, Stretching Mode, U-Shaped Load-Bearing Body, Variable-Rate Springs in Parallel

References

[1] Zhang B, Benmokrane B and Chennouf A et al. Tensile behavior of FRP tendons for prestressed ground anchors. Journal of Composites for Construction. 2001, 85-93.

DOI: 10.1061/(asce)1090-0268(2001)5:2(85)

[2] Gu P, Zou Q and Deng C et al. Test study on frictional resistance of compression dispersive prestressed anchor in saturated mealy sand. Hydro-Science and Engineering. 2009, (2): 78-81. (in Chinese).

[3] Pang Y， Liu H and Chen Y. Numerical simulation of removable anchor pullout test and influence factors. Journal of PLA University of Science and Technology (Natural Science Edition). 2009, 10(2): 170-174. (in Chinese).

[4] Zhang S and Hou Q. Study on shear stress distribution and in-situ test of pressure-dispersive anchor. Journal of Chongqing Jianzhu University. 2004, 26(2): 41-47. (in Chinese).

[5] Zhou W, Shu H and Che J. The effection of anisotropy properties of cohesive soil to lateral pressure test in Jinzhou area. Journal of Jinzhou Normal College (Natural Science Edition). 2003, 24(1): 74-75. (in Chinese).

[6] Jing H, Qu T and Wu X et al. Numerical analysis on influencing factors of pressure dispersive rockbolts mechanical properties. Journal of Xian University of Technology. 2008, 24(1): 32-36. (in Chinese).

[7] Wei L and Chen C. Developing the numerical simulating methods of the 3-D bolt. Rock and Soil Mechanics. 2007, 28(supp. ): 315-320. (in Chinese).

[8] Hibbitt, Karlsson and Sorensen. ABAQUS/Standard User's Manuals, Version 6. 4. (2003).