Research on Three-dimensional Soil Arching Effect and Appropriate Spacing of Cantilever Anti-slide Piles with Consideration of Geostatic Stress

ZHANG Yong-xing, DONG Jie, WEN Hai-jia, TAN Han-hua

China Journal of Highway and Transport ›› 2009, Vol. 22 ›› Issue (2) : 18-25.

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China Journal of Highway and Transport ›› 2009, Vol. 22 ›› Issue (2) : 18-25.
Original Article

Research on Three-dimensional Soil Arching Effect and Appropriate Spacing of Cantilever Anti-slide Piles with Consideration of Geostatic Stress

  • ZHANG Yong-xing1, DONG Jie1, WEN Hai-jia1, TAN Han-hua2
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Abstract

Aimed at problems about the appropriate spacing calculation of cantilever anti-slide pile in chasm slope repelling engineering, its three-dimensional (3-D) calculation model was established by considering presence of geostatic stress and mechanical characteristics about soils between piles, which is based on soil strength condition of sliding body and the relationship between axial stress and arch span. The formulae of critical height and the maximum of clear spacing between adjacent piles were obtained, and their correlations were also discussed. Combined with the formulae, sensitivities of spacing of pile to relative parameters were studied. The distribution shape of soil arching effect along vertical direction was simulated, and its range of influence which located just behind piles was also analyzed. Finally, the calculation model of appropriate spacing was verified by evidence from real engineering which was consistent with the result; 3-D model should be established in study of cantilever soil arching effect.

Key words

road engineering / chasm slope / finite element method / appropriate spacing of pile / soil arching effect / cantilever anti-slide pile / geostatic stress

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ZHANG Yong-xing, DONG Jie, WEN Hai-jia, TAN Han-hua. Research on Three-dimensional Soil Arching Effect and Appropriate Spacing of Cantilever Anti-slide Piles with Consideration of Geostatic Stress[J]. China Journal of Highway and Transport, 2009, 22(2): 18-25

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