TY - GEN
T1 - Numerical analysis on loading transfer mechanism of geosynthetic-reinforced embankments over the Hong Kong marine deposits improved by deep cement mixed soil columns
AU - Wu, Pei Chen
AU - Feng, Wei Qiang
AU - Yin, Jian Hua
N1 - Funding Information:
The research work was under the support of two GRF projects (PolyU 152196/14E; PolyU 152796/16E) from RGC of HKSARG of China. The authors also acknowledge the financial supports from Research Institute for Sustainable Urban Development of The Hong Kong Polytechnic University, grants (1-ZVCR, 1-ZVEH, 4-BCAU, 4-BCAW, 5-ZDAF, G-YN97) from The Hong Kong Polytechnic University.
Publisher Copyright:
© (2018) by Korean Geosynthetics Society All rights reserved.
PY - 2018
Y1 - 2018
N2 - The loading transfer mechanism of geosynthetic-reinforced embankments over soft ground improved by piles or columns has been studied for many years. However, for most cases, the consolidation of the soft soil ground, such as the Hong Kong Marine Deposits (HKMD), with noticeable time-dependent stress-strain behavior, has not been considered before. In this study, a finite element analysis is utilized to study the loading transfer of geosynthetic-reinforced embankment over HKMD improved by deep cement mixed soil (DCM) columns during both construction and post-construction stages. Based on the numerical analysis, it is found that, in the stage of embankment construction, the soil arching develops with increasing the filling height and the limit height of arching is 1.67 times the spacing of the DCM columns. In the stage of the post-construction, the soil arching undergoes a further development and the stress concentration ratio between the DCM columns and surrounding soil increases exponentially with the differential settlement.
AB - The loading transfer mechanism of geosynthetic-reinforced embankments over soft ground improved by piles or columns has been studied for many years. However, for most cases, the consolidation of the soft soil ground, such as the Hong Kong Marine Deposits (HKMD), with noticeable time-dependent stress-strain behavior, has not been considered before. In this study, a finite element analysis is utilized to study the loading transfer of geosynthetic-reinforced embankment over HKMD improved by deep cement mixed soil (DCM) columns during both construction and post-construction stages. Based on the numerical analysis, it is found that, in the stage of embankment construction, the soil arching develops with increasing the filling height and the limit height of arching is 1.67 times the spacing of the DCM columns. In the stage of the post-construction, the soil arching undergoes a further development and the stress concentration ratio between the DCM columns and surrounding soil increases exponentially with the differential settlement.
KW - Deep cement mixed soil columns
KW - Embankment
KW - Geosynthetic reinforcement
KW - Soil arching
UR - http://www.scopus.com/inward/record.url?scp=85099644986&partnerID=8YFLogxK
M3 - Conference article published in proceeding or book
AN - SCOPUS:85099644986
T3 - 11th International Conference on Geosynthetics 2018, ICG 2018
SP - 550
EP - 557
BT - 11th International Conference on Geosynthetics 2018, ICG 2018
PB - Korean Geosynthetics Society
T2 - 11th International Conference on Geosynthetics 2018, ICG 2018
Y2 - 16 September 2018 through 21 September 2018
ER -
