Model Test Investigation on Rectangular Section Composite Micro-Pile Structure for Earth Slope Reinforcement

Abstract:

Model test investigation on rectangular section composite micro-pile structure used for earth slope reinforcement has been performed, including the mechanical and deformation properties and pile spacing influence on anti-sliding capacity. Test results have shown the main following conclusions. For the rectangular section composite micro-pile structure and the similar soil in tests, micro-pile row spacing along the lateral load direction ranging from 4D to 6D (D is the diameter of micro-pile) can provide higher anti-sliding capacity. Active earth pressure of the first row pile is larger than that of other piles when the anti-sliding potential of composite micro-pile structure is fully developed. Relative deformation of the first row pile is larger than that of the middle and last row piles above the slip surface, while relative deformation of the last row pile is larger than that of other piles beneath the slip surface. The main failure mode of the rectangular section composite micro-pile structure can be regarded as bending failure in certain range near the slip surface.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 2256-2261
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.2256
• Online since: December 2010
• Authors: Xiao Li Liu, Dan Dan Zhang, Kai Liu
• Keywords: Composite Micro-Pile Structure, Earth Slope, Model Test, Rectangular Section

References

[1] M.J. Thompson, in : Compendium of student papers : Transportation Scholars Conference, Iowa State University, November 19, 2004, edit by Midwest Transportation Consortium, [Ames, Iowa] Midwest Transportation Consortium Publisher (2004).

[2] Andrew Z Boeckmann: Load transfer in micropiles for slope stabilization from test of large-scale physical models, MsD, Columbia: University of Missouri-Columbia (2006).

DOI: 10.32469/10355/4633

[3] J.K. Yan, Y.P. Yin and Y.M. Men: Journal of Engineering Geology Vol. 17 No. 5 (2009), p.669 (In Chinese).

[4] J.K. Yan, Y.P. Yin and Y.M. Men: South-to-North Water Transfers and Water Science & Technology Vol. 8 No. 1 (2010), p.44 (In Chinese).

[5] R. Cantoni, T. Collotta, V.N. Ghionna and P.C. Moretti: Ground Engineering Vol. 22 No. 1 (1989), p.41.

[6] C.S. Jiang, D.P. Zhou: Journal of Railway Engineering Society No. 2 (2009), p.39 (In Chinese).

[7] D.P. Zhou: Chinese Journal of Rock Mechanics and Engineering No. 7 (2009), p.1353 (In Chinese).