Deformation of centrifugal modelling process of piled embankments

JIANG Yan-bin; HE Bin; QIAN Ya-jun; WANG Zhang-chun; HE Ning

doi:10.11779/CJGE2020S2033

Volume 42 Issue S2

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2020 > 42(S2): 185-189. > DOI: 10.11779/CJGE2020S2033

JIANG Yan-bin, HE Bin, QIAN Ya-jun, WANG Zhang-chun, HE Ning. Deformation of centrifugal modelling process of piled embankments[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S2): 185-189. DOI: 10.11779/CJGE2020S2033

Citation:

PDF (989 KB)

Deformation of centrifugal modelling process of piled embankments

1.
Department of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China
2.
School of Architectural Engineering, Jinling Institute of Technology, Nanjing 211169, China

More Information

Received Date: August 06, 2020
Available Online: December 07, 2022

Graphical Abstract

Abstract

Abstract

The deformation of centrifuge modelling of piled embankments is closely related to the test process. The characteristics and mechanism of settlement and sectional deformation of composite foundation at each testing stage are investigated by the laser ranging method and the image analysis method. The results show that it is impossible to eliminate the deformation of the composite foundation itself during the filling stage by preparing the model under 1g and adopting the method of increasing the centrifugal acceleration to simulate the embankment surcharge. Therefore, the settlements of the foundation during the filling stage and the final settlement are both overestimated in the tests. The foundation rebound is shown at the centrifugal deceleration stage and placement stage under 1g. As a result, the settlement near the centerline of the road will be underestimated, and the horizontal displacement at the slope toe and the uplift outside the slope will be overestimated based on the measured deformation after the centrifugal tests. This study may enrich the understanding of centrifugal deformation process tests on piled embankments.
- centrifugal modelling test,
- settlement,
- cross-sectional deformation,
- piled embankment,
- testing process,
- centrifugal acceleration stage

FullText(HTML)

References (10)

References

[1]	《岩土离心模拟技术的原理和工程应用》编委会. 岩土离心模拟技术的原理和工程应用[M]. 武汉: 长江出版社, 2011. The Compiling Group. Principle and Engineering Application of Centrifugal Simulation Technology[M]. Wuhan: Changjiang Press, 2011. (in Chinese)
[2]	ZHENG J, CHEN B, LU Y, et al. The performance of an embankment on soft ground reinforced with geosynthetics and pile walls[J]. Geosynthetics International, 2009, 16(1): 1-10. doi: 10.1680/gein.2009.16.1.1
[3]	姜彦彬, 何宁, 林志强, 等. 路堤深厚软基管桩复合地基数值模拟[J]. 水利水运工程学报, 2018(2): 43-51. https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY201802006.htm JIANG Yan-bin, HE Ning, LIN Zhi-qiang, et al. Numerical study on pipe pile composite foundation of deep soft foundation under embankment[J]. Hydro-science and Engineering, 2018(2): 43-51. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY201802006.htm
[4]	黄俊杰, 王薇, 苏谦, 等. 素混凝土桩复合地基支承路堤变形破坏模式[J]. 岩土力学, 2018, 39(5): 1653-1661. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201805014.htm HUANG Jun-jie, WANG Wei, SU Qian, et al. Deformation and failure modes of embankments on soft ground reinforced by plain concrete piles[J]. Rock and Soil Mechanics, 2018, 39(5): 1653-1661. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201805014.htm
[5]	ELLIS E, ASLAM R. Arching in piled embankments: comparison of centrifuge tests and predictive methods - part 1 of 2[J]. Ground Engineering, 2009, 42(6): 34-38.
[6]	WANG C, WANG B, GUO P, et al. Experimental analysis on settlement controlling of geogrid-reinforced pile-raft- supported embankments in high-speed railway[J]. Acta Geotechnica, 2013, 10: 1-12.
[7]	姜彦彬, 何宁, 耿之周, 等. PCC桩复合地基离心模型制备及桩土接触模拟[J]. 水利水运工程学报, 2020(2): 91-98. https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY202002013.htm JIANG Yan-bin, HE Ning, GENG Zhi-zhou, et al. Simulating the PCC pile composite foundation for centrifuge modelling and pile-soil interaction[J]. Hydro-Science and Engineering, 2020(2): 91-98. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY202002013.htm
[8]	殷宗泽. 土工原理[M]. 北京: 中国水利水电出版社, 2007: 85-369. YIN Zong-ze. Geotechnical Theory[M]. Beijing: China Water Power Press, 2007: 85-369. (in Chinese)
[9]	INDRARATNA B, BALASUBRAMANIAM A S, BALACHANDRA S. Performance of test embankment constructed to failure on soft marine clay[J]. Journal of Geotechnical Engineering, 1992, 118(7): 981-995.
[10]	CHAI J, MIURA N, SHEN S. Performance of embankments with and without reinforcement on soft subsoil[J]. Canadian Geotechnical Journal, 2002, 39(4): 838-848.