Comparative Model Test of Anti-slide Anchor Pile and Common Anti-slide Pile to Reinforce Loess Landslide

ZHANG Tao; MEN Yu-ming; SHI Sheng-wei; LI Xun-chang

doi:10.11988/ckyyb.20160364

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Journal of Changjiang River Scientific Research Institute ›› 2017, Vol. 34 ›› Issue (7) : 70-76. DOI: 10.11988/ckyyb.20160364

ROCK-SOIL ENGINEERING

Comparative Model Test of Anti-slide Anchor Pile and Common Anti-slide Pile to Reinforce Loess Landslide

ZHANG Tao^1,2, MEN Yu-ming³, SHI Sheng-wei^1,2, LI Xun-chang³

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Abstract

The stress form, internal force distribution and failure mode of anti-slide anchor piles of different structures are compared and analyzed by measuring the soil resistance, bending moment of piles body and the strain of anchor in three model tests of reinforcing loess landslide by different pile-anchor structures (common anti-slide pile and anti-slide anchor pile). Results show that 1) in the prevention and control of loess landslide, the stress of anti-slide anchor pile displays an "S" shape, and the displacement of pile top is smooth and continuous, and the distributions of soil resistance and bending moment of pile body are more uniform; 2) increasing the number of anchors at the top of pile could increase the anti-slide force; 3) the failure mode of common anti-slide pile is mainly plastic single hinge damage, while that of anti-slide anchor pile is mainly single hinge (or double hinges) damage; the main failure of anchor is bending-shear slip damage, and that of the soil around pile is mainly plastic failure of soil arch. The research results provide technical support for the design theory of anti-slide anchor pile in loess landslide prevention and control.

Key words

anti-slide anchor pile / common anti-slide pile / comparative model test / loess landslide / failure mode

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ZHANG Tao, MEN Yu-ming, SHI Sheng-wei, LI Xun-chang. Comparative Model Test of Anti-slide Anchor Pile and Common Anti-slide Pile to Reinforce Loess Landslide[J]. Journal of Changjiang River Scientific Research Institute. 2017, 34(7): 70-76 https://doi.org/10.11988/ckyyb.20160364

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