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| Analysis of Mechanical Behavior of Pile Foundation of Railway Bridge Pier on Consideration of Slope Effect |
| LIN Peng-zhen, WU Fa-hui, Yang Zi-jiang |
| Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China |
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Abstract Research purposes: In order to comply with the demands of road, lots of pile foundation of bridge are built on high and steep slope in plateau area. The load on the pile foundation of the pier located on slope is more complex because of the influence of the horizontal resistance of slope soil Program, the slope-pier cap-pile foundation mechanical behavior on the piles. By using the nonlinear finite element analysis model is built on consideration of the non-linear influences of the materials and pile-soil touch to study the mechanical behavior of the slope-pile cap-pile foundation system under conditions of dead load and combined loads from the areas of the load bearing capacity, deformation and stresses of the system.
Research conclusions: From the analysis of the calculation example, it is concluded: (1)For bridge pier with pile foundation on slope, the horizontal resistance of the slope has rather big influence on the pile foundation bearing the load and the displacement and stress of the pile foundation are of nonuniformity along the slope. (2)For multi-layered soil slope, the displacement and stress of the pile foundation sharply change in the parting region of soil layers and the pile foundation has an unfavorable load bearing area in the parting region of soil interlayers. (3)The research method and results presented in this paper can provide the reference to design and mechanical analysis of the pile foundation of bridge on slope.
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Received: 15 April 2013
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2013, Vol. 30 
