Effect of Geotextile and Prefabricated Vertical Drains Used in Soft Soil Foundation

Abstract:

Based on the generalized formulation of two dimensional Biot′s theory of consolidation, the effect of geotextile and prefabricated vertical drains (PVDs) using in soft soil foundation was studied with nonlinear finite element method. The dissipation of excess pore pressure, vertical settlement and lateral displacement of foundation were contrasted between foundations with and without PVDs. It is found that the vertical settlements become lager, the lateral displacements become less and the bulges at the toe of embankment become less at the same time of consolidation when PVDs are used. And the stability of embankment improved for the bearing capacity of soil enhanced with excess pore pressure dissipated fast. Meanwhile, the axial force of geotextile become less when PVDs are used. Those changes showed that the design of foundation can be optimized by shortening the time of consolidation when PVDs are used.

• Periodical: Advanced Materials Research (Volumes 197-198)
• Pages: 981-986
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.197-198.981
• Online since: February 2011
• Authors: Jie Qun Liu, Jin Long Liu
• Keywords: Consolidation, Geotextile, Nonlinear Finite Element Method, Prefabricated Vertical Drains, Soft Soil Foundation

References

[1] Yang GuoLin. Mechanics In Engineering, vol. 24(2002), No. 1, P. 9. (In Chinese).

[2] Xu Shuping, Liu Zude. Rock and Soil Mechanics, vol. 24(2003), No. 2, P. 307. (In Chinese).

[3] Fan Zhen-hui, Wang Yong-he. Journal of Central South University of Technology(Science and Technology), vol. 36(2005), No. 5, P. 904. (In Chinese).

[4] Liu Hanlong, Wu Weijun, Gao Yufeng. Rock and Soil Mechanics, vol. 24(2003), No. 1, P. 79. (In Chinese).

[5] Tan S A, Chew S H, Ng C C, et al. Geotextiles and Geomembranes, vol. 19(2001), P. 163.

[6] Shan H Y, Wang W L, Chou T C. Geotextiles and Geomembranes, vol. 19(2001), P. 509.

[7] Raymond G P, Bathurst R J, Hajek J. Geotextiles and Geomembranes, vol. 18(2000), P. 23.

[8] Iryo T, Rowe R K. Canadian Geotechnical Journal, vol. 42(2005), P. 1145.

[9] GB50290-98, Technical standard for applications of geosynthetics[S]. (In Chinese).

[10] Rowe R K, Soderman K L. Canadian Geotechnical Journal, vol. 22(1985), No. 3, P. 392.

[11] Bergado D T, Long P V, et al. Geotextiles and Geomembranes, vol. 13(1994), P. 403.

[12] Palmeira E M, Pereira J H F, Silva D. Geotextiles and Geomembranes, vol. 16(1998), P. 273.

[13] Hinchberger S D, Rowe R K. Geotextiles and Geomembranes, vol. 21(2003), P. 151.

[14] Rowe R K, Mylleville B L J. Proceedings of the Fourth International Conference on Geotextiles, Geomembranes and Related Products[C], The Hague, 1990: 131.

[15] Bergado D T, Long P V, Murthy, B R S. Geotextiles and Geomembranes, vol. 20(2002), P. 343.

[16] Zhu Xiang, Huang Xiaoming, Deng Xuejun. Journal of Highway and Transportation Research and Development, vol. 17(2002), No. 1, P. 1. (In Chinese).

[17] Liu Chunhong, Xiao Zhaoyun, Wang Jianhua, et al. Rock and Soil Mechanics, vol. 25(2004), Supp. 2, P. 325. (In Chinese).