Shaking Table Tests on Bridge Foundation Reinforced by Anti-slide Piles on Slope |
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| Authors: | ZHOU Heng SU Qian LIU Jie and YUE Fei |
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| Institution: | School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Chengdu 610031, China,School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Chengdu 610031, China,School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China and School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | Based on the requirement of seismic reinforcement of bridge foundation on slope in the Chengdu-Lanzhou railway project, a shaking table model test of anti-slide pile protecting bridge foundation in landslide section is designed and completed. By applying Wenchuan seismic waves with different acceleration peaks, the stress and deformation characteristics of bridge pile foundation and anti-slide pile are analyzed, and the failure mode is discussed. Results show that the dynamic response of bridge pile and anti-slide pile are affected by the peak value of seismic acceleration of earthquake, with which the stress and deformation of the structure increase. The maximum dynamic earth pressure and the moment of anti-slide piles are located near the sliding surface, while that of bridge piles are located at the top of the pile. Based on the dynamic response of structure, local reinforcement needs to be carried out to meet the requirement of the seismic design. The PGA amplification factor of the surface is greater than the inside, and it decreases with the increase of the input seismic acceleration peak. When the slope failure occurs, the tension cracks are mainly produced in the shallow sliding zone and the coarse particles at the foot of the slope are accumulated. |
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| Keywords: | Shaking table test Anti-slide pile Bridge pile foundation Dynamic response Damage mode |
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