Field tests on mechanical behavior of pile-supported embankment in soft soil area

YANG Guang-qing; WANG Xin; WANG Xi Zhao; JIN Jin Zhao; ZHANG Chao

doi:10.11779/CJGE202211015

Volume 44 Issue 11

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Chinese Journal of Geotechnical Engineering > 2022 > 44(11): 2089-2096. > DOI: 10.11779/CJGE202211015

YANG Guang-qing, WANG Xin, WANG Xi Zhao, JIN Jin Zhao, ZHANG Chao. Field tests on mechanical behavior of pile-supported embankment in soft soil area[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(11): 2089-2096. DOI: 10.11779/CJGE202211015

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Field tests on mechanical behavior of pile-supported embankment in soft soil area

YANG Guang-qing^{1, 2,},
WANG Xin^{1, 3, ,},
WANG Xi Zhao⁴,
JIN Jin Zhao⁵,
ZHANG Chao⁵

1.
State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
2.
School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
3.
School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
4.
Hebei University of Science and Technology, Shijiazhuang 050018, China
5.
Hebei Xiongan Rongwu Highway Co., Ltd., Rongcheng 050000, China

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Received Date: October 26, 2020
Available Online: December 08, 2022

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Abstract

Abstract

Based on the field tests, the influences of pile spacing and reinforcement form on the mechanical behavior of pile-supported reinforced embankment are studied. The soil pressures at the top of the pile, the soil stresses between the piles and the deformations of the geogrid at the center line of embankment, 10 m to the right of the center line and shoulder vertical line, are monitored. The variation of stresses of piles and soil, the variation of loads on cross section of subgrade and the deformation laws of geogrid of cross section of subgrade are analyzed. The results show that the critical height of embankment is 1~1.5 times the net spacing of piles. From the embankment center line to the shoulder direction, the stress reduction coefficient increases gradually, and the stress concentration effect decreases gradually. From the embankment center line to the shoulder direction, the deformation of geogrid decreases gradually. The load transfer of pile-supported embankment is mainly based on soil arching effect and supplemented by membrane effect. The test results are compared with the calculated ones of five theoretical methods to evaluate the applicability of the five methods.
- field test,
- pile-supported reinforced embankment,
- geogrid,
- soil arching effect,
- deformation

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References (24)

References

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