Liquefaction Analysis of Large Diameter Long Pile Foundation in Medium Dense Sand under Earthquake Based on Finite Difference Method

Abstract:

Liquefaction properties of large diameter long pile in medium dense sand under earthquake was investigated based on finite difference method. Dynamic property of foundation soil was modeled with equivalent linear model, three peak acceleration of 0.2g, 0.15g and 0.1g was studied. Numerical calculation results show that: peak acceleration affects large pore pressure zone and maximum pore pressure, when peak acceleration increase from 0.1g to 0.2g, large pore pressure zone moved from middle to bottom of pile, maximum pore pressure raised from 45 kPa to 350 kPa; liquefaction zone of foundation has a heart shape, and expanded with increase of peak acceleration, peak acceleration increase from 0.1g to 0.2g, depth of liquefaction zone bottom increase from 27% to 41% pile length, width of liquefaction zone increase from 34% to 41% pile length, peak acceleration reached to 0.2g, liquefaction zone extended to ground surface.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 1532-1535
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.1532
• Online since: December 2012
• Authors: Min Min Jiang, Zhao Ran Xiao, Shang Yu Han
• Keywords: Earthquake, Finite Difference Method (FDM), Large Diameter Long Pile, Liquefaction

References

[1] Fan K, Gazetas G, Kaynia A, et al. Kinematic Seismic Response of Single Piles and Pile Groups [J] Journal of Geotechnical Engineering, ASCE, 1997, 117(2): 1860–1879.

DOI: 10.1061/(asce)0733-9410(1991)117:12(1860)

[2] D Su, X S Li. Effect of shaking intensity on seismic response of single pile foundation in liquefiable [J] Geotechnical Special Publications, ASCE, 2006, 152: 379–386.

DOI: 10.1061/40864(196)51

[3] Y Song. On Load Settlement Relation of Long Large diameter Cast in Situ Place Piles Under Negative Friction [J]. Port and Waterway Engineering, 2007, (12): 20–25. (In Chinese).

[4] Lai P, McVay M, Bloomquist D, et al. Axial Pile Capacity of Large Diameter Cylinder Piles [C] Research to Practice in Geotechnical Engineering Congress, 2008: 366–383.

DOI: 10.1061/40962(325)11

[5] B Han, D P Qiao, Z H Wang. Study on behavior of stress of large diameter and concrete bored long pile in sand soils [J]. Concrete, 2010, (3): 130–133. (In Chinese).

[6] Ayothiraman R, Prakash G C. Pile diameter effect on bending behaviour of piles in clay under earthquake loads[J]. Geotechnical Special Publications, ASCE, 2010, 205: 119–128.

DOI: 10.1061/41106(379)14

[7] P Z Chen, M T Luan, Q Lou. Parametric finite element analysis of effective pile-length in super-long and large diameter pile groups [J]. Journal of Graduate University of Chinese Academy of Sciences, 2012, 29(3): 307–311. (In Chinese).

[8] X B Wang, S L Wen, W Q Xu, et al. Numerical analysis of load inclination influence on the bearing behavior of large-diameter long pile [J]. Hydro-Science and Engineering, 2012, (4): 8–14. (In Chinese).

[9] Z J Shen, G Xu. Deformation of rock materials under cyclic loading[J]. Hydro-Science and Engineering, 1996(2): 143–150. (In Chinese).