Abstract
More and more rigid frame bridges with high piers and large spans are built in the high and steep slope areas of deep valleys in southwest China. The slow deformation of the slope in the geological sense often causes the problems of piles, which in turn causes damage of the upper bridges. The vertical bearing characteristics of bridge piles in slope still need to be conducted because of the peculiarity of slope topography. The vertical deformation and bearing characteristics of piles in the slope area were experimentally studied by considering different influencing factors and the fitting formula for the ultimate bearing capacity of the piles under vertical load is obtained. The results show that the vertical deformation and ultimate bearing capacity (defined by vertical limit settlement deformation of 0.013 times the pile diameter) of the pile are closely related to its position in the slope. The pile in the middle of the slope has the lowest vertical ultimate bearing capacity. Moreover, the side frictional resistance transfer depth of the pile in continuous slope is greater than that of the pile in unilateral slope. Additionally, the slope angle has a significant influence on the vertical bearing performance of piles. The delayed settlement of the pile top decreases approximately 40% at most and the vertical ultimate bearing capacity of the pile increases 48.6% at most as the slope angle decreases by 15°. Meanwhile, the side friction resistance of the pile increases with the decrease of slope angle. The bending moment applied to the pile top reduces the vertical ultimate bearing capacity of the pile and increases the axial force of the pile body. The results can provide data support for pile design and instability judgment with similar geological conditions.
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References
Ashour M, Ardalan H (2012) Analysis of pile stabilized slopes based on soil—pile interaction. Computers and Geotechnics 39:85–97, DOI: https://doi.org/10.1016/j.compgeo.2011.09.001
Dai GL, Dai YX, Liu YZ, Gong WM (2011) Study of pile group effect coefficient for super-long bored piles. China Civil Engineering Journal 44(10):107–112, DOI: https://doi.org/10.15951/j.tmgcxb.2011.10.018
Dong J, Yang Y, Xu YM, Song XG (2018) A method for determining pile length of free section of pile foundation of slope bridge. China Railway Science 39(3):15–23
Feng ZJ, Wang H, Wei J, Gao X, Jia YW, Zhang X (2015) Model tests on vertical bearing performance of bridge pile foundation in loess gulch slope area. Chinese Journal of Geotechnical Engineering 37(12):2308–2314, DOI: https://doi.org/10.11779/CJGE201512022
Gao BL, Zhang CR, Zhang ZX (2014) Model tests on effect of slopes on lateral resistance of near single piles in sand. Rock and Soil Mechanics 35(11):3191–3198, DOI: https://doi.org/10.16285/j.rsm.2014.11.036
Gong CZ, He CL, She YX, Sun WB (2011) Study on bearing characteristics of large diameter and long rock-socket pile of beipan river bridge. Advanced Materials Research 261–263, 1669–1673, DOI: https://doi.org/10.4028/www.scientific.net/amr.261-263.1669
Gong XB, Yang MH, Zhao MH, Yin PB, Zhang XW (2013) Load-bearing mechanism model test for bridge pile foundation in high-steep transverse slope. China Journal of Highway and Transport 26(2):56–62, DOI: https://doi.org/10.19721/j.cnki.1001-7372.2013.02.009
Jesmani M, Kasrania A, Kamalzare M (2016) Finite element modelling of undrained vertical bearing capacity of piles adjacent to different types of clayey slopes. International Journal of Geotechnical Engineering 12(2):147–154, DOI: https://doi.org/10.1080/19386362.2016.1254398
Jesmani M, Kasrania A, Kamalzare M, Mehdipour I (2015) Undrained vertical bearing capacity of pile located near soft clay slope. Journal of Engineering Research 3(3), DOI: https://doi.org/10.7603/s40632-015-0021-8
JGJ94-2008 (2008) Technical code for building pile foundations. Ministry of Construction of the People’s Republic of China, Beijing, China
JTG D60-2015 (2015) General specification for design of highway bridges and culverts. Ministry of Transport of the People’s Republic of China, Beijing, China
Luan J, Hao XW, Zhao BJ (2016) Effect of loess gully slope terrain on bearing performance of pile foundation. Journal of Chang’an University (Natural Science Edition) 36(6):62–68, DOI: https://doi.org/10.19721/j.cnki.1671-8879.2016.06.009
Niu FS, Xu JC, Ma K (2014) Field experimental study of transmitted characteristics of pile foundation under vertical load in loess slope. Rock and Soil Mechanics 35(7):1899–1906, DOI: https://doi.org/10.16285/j.rsm.2014.07.025
Qu LM, Ding XM, Wu CR, Long YH, Yang JC (2020) Effects of topography on dynamic responses of single piles under vertical cyclic loading. Journal of Mountain Science 17(1):230–243, DOI: https://doi.org/10.1007/s11629-019-5533-5
Qu LM, Ding XM, Zheng CJ, Wu CR, Cao GW (2021) Numerical and test study on vertical vibration characteristics of pile group in slope soil topography. Earthquake Engineering and Engineering Vibration 20(2):377–390, DOI: https://doi.org/10.1007/s11803-021-2026-7
Wang YY, Deng RG, Guo T, Wang WP, Zhang J (2022) Model test study on horizontal bearing characteristics of foundation piles on soft sandstone slopes. Chinese Journal of Rock Mechanics and Engineering 41(7):1466–1475, DOI: https://doi.org/10.13722/j.cnki.jrme.2021.0715
Won J, You K, Jeong S, Kim S (2005) Coupled effects in stability analysis of pile—slope systems. Computers and Geotechnics 32(4):304–315, DOI: https://doi.org/10.1016/j.compgeo.2005.02.006
Yang J (2005) Similitude theory and model test. Wuhan University of Technology Press, Wuhan, China
Yuan WZ (1998) Similitude theory and statics model test. Southwest Communications Press, Chengdu, China
Zhang JW, Wang XJ, Wang H, Qin HY (2020) Model test and numerical simulation of single pile response under combined loading in slope. Applied Sciences 10(17):6140, DOI: https://doi.org/10.3390/app10176140
Zhao MH, Luo WH, Lei Y (2014) In-site load-carrying characteristics test of rock-socketed piles of Mishui River Bridge. Journal of Hunan University (Natural Sciences) 41(3):1–6
Zhao MH, Liu JH, Liu DQ, Wang Y (2008) Force analysis of pile foundation in rock slope based on upper-bound theorem of limit. Journal of Central South University of Technology 15(3):404–410, DOI: https://doi.org/10.1007/s11771-008-0076-x
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The research was supported by the National Natural Science Foundations of China (Grant No. 41272321 and 41977213).
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Wang, Y., Deng, R., Guo, T. et al. Experimental Analysis of Vertical Deformation and Bearing Characteristics of Bridge Piles in High and Steep Slopes. KSCE J Civ Eng 27, 966–977 (2023). https://doi.org/10.1007/s12205-023-0014-3
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DOI: https://doi.org/10.1007/s12205-023-0014-3