[1] Shi Minglei, Pang Feng, Zhang Bo,. Behaviors of pile-supported embankments in highway engineering [J]. Journal of Southeast University (English Edition), 2005, 21 (4): 495-499. [doi:10.3969/j.issn.1003-7985.2005.04.024]

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Behaviors of pile-supported embankments in highway engineering()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

21

Issue:

2005 4

Page:

495-499

Research Field:

Civil Engineering

Publishing date:

2005-12-30

Info

Title:

Behaviors of pile-supported embankments in highway engineering

Author(s):

Shi Minglei;  Pang Feng;  Zhang Bo

College of Transportation, Southeast University, Nanjing 210096, China

Keywords:

variational approach;  pile-supported embankment;  composite foundation improved by columns;  settlement calculation

PACS:

TU473.1

DOI:

10.3969/j.issn.1003-7985.2005.04.024

Abstract:

Based on the variational approach for pile groups embedded in soil modeled using a load-transfer curve method, a practical method was conducted to estimate the settlement of symmetric pile group supported embankments. The working mechanism of composite foundations improved by rigid or semi-rigid columns is analyzed by this method. Under equivalent strain conditions, the pile-soil stress ratio approaches the pile-soil modulus ratio up to a limited value of pile stiffness(R_m<10); in the subsequent stages of high pile stiffness(R_m>10), a further increase in the pile-soil modulus ratio cannot lead to a significant increase of stress transferred to the columns in composite foundations. The major influencing factor of the stress concentration from soil to pile in a high pile-soil modulus ratio is the padding stiffness. For the composite foundation improved by cement mixing columns, the effective column length is about 15 to 20 m and it is a more economical and effective design when the column length is less than 15 m.

References:

[1] Batterfield R, Banerjee P K.The elastic analysis of compressible piles and pile groups [J].Geotechnique, 1971, 21(1):43-60.
[2] Ottaviani M.Three dimensional finite element analysis of vertically loaded pile groups [J].Geotechnique, 1975, 25(2):159-174.
[3] Poulos H G, Davis E H.Pile foundation analysis and design [M]. New York:John Wiley and Sons, 1980.
[4] Chow Y K.Analysis of vertically loaded pile groups [J].International Journal for Numerical and Analytical Mechanics, 1986, 10(1): 59-72.
[5] Shi Minglei, Deng Xuejun, Liu Songyu.An analysis of settlement of a single pile in cohesive soils[J].Journal of Highway and Transportation Research and Development, 2002, 19(6):81-87.(in Chinese)
[6] Shi Minglei, Deng Xuejun, Liu Songyu.Study of restrain effect of among piles [J].Journal of Southeast University (Natural Science Edition), 2003, 33(3):343-347.(in Chinese)
[7] Han J, Gabr M A.A numerical study of load transfer mechanisms in geosynthetic reinforced and pile supported embankments over soft soil [J].Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 2002, 128(1), 44-53.
[8] Shen W Y.A variational approach for the analysis of pile group-pile cap interaction [J].Geotechnique, 2000, 50(4):349-357.

Memo

Memo:

Biography: Shi Minglei(1962—), male, doctor, associate professor, Mingleish@263.net.

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