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| The p-y curve and computation method of the horizontal bearing capacity of piles in sloping ground |
| YIN Pingbao1，2，NIE Daoliu1，YANG Zhaohui1，2，HE Wei1，JIA Wenwen1 |
| (1. School of Civil Engineering，Changsha University of Science and Technology，Changsha，Hunan 410114，China；2. University of Alaska Anchorage，Anchorage，Alaska 99508，USA) |
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Abstract The p-y curve and calculation methods of piles in sloping ground need further study. The p-y curves for cohesive and sand slopes were established by improving the p-y curve proposed by Matlock for clay and the hyperbolic p-y curve for sand，and the deflection differential equation of piles in sloping ground were deduced accordingly. A finite difference method for analysing the internal force and displacement of pile shaft was proposed. The methods were verified through Matlock tests and indoor model tests. The calculated results of the horizontal displacement and bending moment of piles with the proposed method are in good agreement with the experimental results. The maximum calculation error is less than 20%，and the error increases with the horizontal loads and slope angles. The maximum bending moment of piles occurs within the depth of 3 to 6 times the pile diameter below the ground surface. The locations of the maximum and zero bending moment increase with the slope angles and horizontal loads. In order to improve the bending capacity of piles in sloping ground，reinforcement should be increased in the range of 6 times the pile diameter below the ground surface，and the full length reinforcement along pile shaft is recommended.
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2018, Vol. 37 
