Stability Analysis of Pile-column Bridge Pile Considering Slope Effect

YIN Ping-bao, ZHAO Ming-hua, ZHAO Heng, HE Wei


   The soil resistance is a nonlinear function varying with depth, and it is related to the effect of location in slopes. The simplified model for a pile-column bridge pile and the total potential energy equation of pile-slope system were presented by considering the slope effect. The analytical solution of the critical load and calculated length were derived based on the energy method. In this respect, verification between the measurement and theoretical solution was conducted by dissimilar conditions in plain and slope. The parametric study shows: the increase of the Young's modulus of the pier column or decrease of its free length enhances the stability of the pile foundation; the appointed elastic modulus of pier column corresponds to an optimal column-height, and the best stability is achieved while the ratio is in the range of 0.3 to 0.4. Moreover, a key conclusion from observations is that the bridge pile should be located at the slope with the gradient less than 35° for safety. However, the correlation between m and α is of significance so that it needs to be further investigated.



Keywords: bridge engineering,  piles foundation,  stability,  energy method,  slope effect

Full Text:



ZOUZ Xin-jun, CHEN Shao-yu. YIN Bang-shun. et al. Model test for dynamic stability of piles[J]. Journal of Hunan University :Natural Sciences. 2012. 39( 12): 19 — 24. (In Chinese)

Yong-jie. LI You-jun. ZHAO Ming-hua. et al. Design and calculation method for pile group foundation in high and steep slope[J]. China Journal of Highway and Transport» 2014. 27(10); 84 — 92. (In Chinese)

YIN Ping-bao, ZHAO Ming-hua, YANG Ming-hui, et al. Force analysis of bridge double-pile in high and steep slope with consideration of P~A effect [J]. Journal of Hunan University : Natural Sciences, 2012. 39(1) : 1—6. (In Chinese)

LEE К L. Buckling of partially embedded piles in sand [J]. Journal of Soil Mechanics and Foundation Division, ASCE, 1968, 94(1): 255-270.

REDDY A S, VALSANGKAR A J. Buckling of fully and partially embedded piles [J]. Journal of Soil Mechanics and Foundation Division, ASCE, 1970, 96(6); 1951 — 1965.

ZHAO Ming-hua. Buckling analysis and tests of bridge piles [J]. China J ournal of Highway and Transport, 1990, 3(4): 47 — 57. (In Chinese)

PENG Xi-ding. Calculation of critical load of pile considering resistance of soil on the side of pile [J]. China Civil Engineering Journal, 1996, 29(5); 43 — 48. (In Chinese)

YANG Wei-hao. REN Yan-long. Axial buckling analysis of bottom-fixed pile[J]. Chinese Journal of Rock Mechanics and Engineering. 2000.19(3): 380 — 382. (In Chinese)

GUO Hong-yu. JIA Yan-min. Determination of critical loads for piles by energy method considering frost heave forces and resistance to deformation of frozen soil [J] - Engineering Mechanics, 2007, 24(7): 167— 173. (In Chinese)

ZOU Xin-jun, ZHAO Ming-hua, LIU Guang-dong. Buckling analysis of super-long rock-socketed filling piles in soft soil are-a by element free Galerkin method [J], Journal of Central South University. 2007.14(6): 858 — 863.

YAO Wen-juan, QIUYuan-zhong. CHENG Ze-kun. Initial post-buckling analysis for super-long rock-socketed piles[J]. Chinese Journal of Geotechnical Engineering. 2009, 31 ( 5) ; 738-742. (In Chinese)

ZHANG Yong-xing, CHEN Lin. WU Shu-guang. Stability a-nalysis of pile on a Wieghardt-type elastic foundation [J]. Chinese Journal of Geotechnical Engineering. 2010, 32(S2) ; 9 — 12. (In Chinese)


  • There are currently no refbacks.