3-D Numerical Simulation for Large-Diameter Cast-In Situ Tubular Pile

Abstract:

Large-diameter cast-in-situ tubular pile (shorted as LTP) is a new, efficiency and energy saving, environmental protection pile and has been widely put into use in the foundation treatment. Using finite element method (FEM) to analyze and study the behavior of LTP is a very effective research method. This paper adopted the finite element computation software ANSYS 11.0 to conduct a 3-D numerical simulation for the LTP of a typical project. In this paper, it introduced how to realize the finite element model, specifically discussed how to select the appropriate key parameters and proposed an effective method and steps base on experience to determine the key parameters. By calculating, compared the calculated Q-S curve with the measured one and then analyzed the settlement behavior and the inner friction distribution of LTP, it is found that the inner friction only emerge at the bottom of the soil core and the upper part nearly does not have friction. The critical point in depth decreased and the maximum inner friction increased with the increasement of the load. Under the ultimate load, the sphere of influence of LTP decreased rapidly and the inner friction increased significantly.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 4009-4013
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.4009
• Online since: July 2011
• Authors: Jun Li, Jian Zhou
• Keywords: 3D Numerical Simulation, Inner Friction, Large-Diameter Cast-In Situ Tubular Pile, Q-S Curve, Soil Core

References

[1] Zhu Xiang-rong, Ye Jun-neng, Jiang Xian-fang et al. Preliminary analysis on load-bearing characteristics of driven-tube cast-in-place [J]. Chinese Journal of Geotechnical Engineering Vol. 25 (2003), pp.538-542, in Chinese.

[2] Zhu Ming-shuang, Wang Jin-chang, Zhu Xiang-rong. Performance analysis of cast-in-place tubular pile composite ground under embankment load [J]. Journal of Zhejiang University (Engineering Science) Vol. 40 (2006), pp.2186-2190, in Chinese.

[3] JGJ106-2003 Technical code for testing of building foundation piles [S] (2003), in Chinese.

[4] Goodman R E, et al. A model for the mechanics of jointed rock [J]. ASCE, 1968, 94 (SM3): 637-660.

[5] Wang Xian-jun, Zhou Wen-yu, Jiang Xin. Application of ANSYS in simulating contact between pile and soil [J]. Forest Engineering Vol. 22 (2006), pp.49-51, in Chinese.

[6] Basic Analysis Guide ANSYS Release 11. 0 [M]. (2007) ANSYS, Inc.

[7] Zhang Bo, Liu Han-long. Analysis of bearing performance of composite foundation with cast-in-situ concrete thin-wall pipe piles under vertical loads [J]. Chinese Journal of Geotechnical Engineering Vol. 29 (2007), pp.1251-1255, in Chinese.

[8] Liu Han-long, Fei Kang et al. Numerical simulation of inner frictional resistance of cast-in-situ concrete thin-wall pipe pile [J]. Rock and Soil Mechanics Vol. 25(2004), pp.211-216, in Chinese.