The Dynamic Analysis of Soft Soil Subgrade in High-Speed Railway Strengthened by PHC Pile

Zhen Hua Pan; Kong Ming Yan; Jin Biao Wu; Zhe Wang; Wei Ming Liao

doi:10.4028/www.scientific.net/AMR.1030-1032.908

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1030-1032The Dynamic Analysis of Soft Soil Subgrade in...

The Dynamic Analysis of Soft Soil Subgrade in High-Speed Railway Strengthened by PHC Pile

Abstract:

The combination of PHC pile (prestressed concrete pile) with geogrid to reinforce the foundation has been widely used in high-speed railway, and the response of dynamic stress under the high-speed train is worth studying. By using Midas/GTS NX software to establish a 3-D model of pile-net composite foundation in one section of Hangzhou - Shenzhen line, the influence of pile-net composite foundation generated by high-speed train is studied. Moreover, this paper also studies the distribution and propagation of dynamic stress generated by train load in soft soil area. The results show that the dynamic stress reducing quickly in the embankment structure and the time –history curve of the dynamic stress behaves differently along the depth. With the depth increasing, there is phenomenon of peak superposition in the time-history curve of the vertical dynamic stress. In the meanwhile, the PHC pile is the main structure to propagate and sustain the dynamic stress in soft soil area, and with the tendency of ‘large in the middle, small on both ends’.

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Periodical:

Advanced Materials Research (Volumes 1030-1032)

Pages:

908-911

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1030-1032.908

Citation:

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Online since:

September 2014

Authors:

Zhen Hua Pan, Kong Ming Yan, Jin Biao Wu, Zhe Wang, Wei Ming Liao

Keywords:

Dynamic Characteristics Analysis, Finite Element Analysis (FEA), MIDAS/GTS, Pile-Net Composite Foundation, Soft Ground

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