TY - JOUR
T1 - Performance of geosynthetic-reinforced pile-supported embankment on soft marine deposit
AU - Chen, Ren Peng
AU - Liu, Qi Wei
AU - Wang, Han Lin
AU - Liu, Yuan
AU - Ma, Qing Lei
N1 - Funding Information:
The present study was supported by the National Natural Science Foundation of China (grant nos. 41472244, 51608188, 751201246). The financial support from the State Grid Zhejiang Electric Power Co., Ltd, and the technical support from Dr Heng-Yu Wang (Ningbo Institute of Technology, Zhejiang University) and the China Energy Engineering Group Zhejiang Electric Power Design Institute Co., Ltd are also gratefully acknowledged.
Publisher Copyright:
© 2020 ICE Publishing: All rights reserved.
PY - 2021/12/1
Y1 - 2021/12/1
N2 - This study presents field investigations of a geosynthetic-reinforced pile-supported embankment for a transformer substation constructed on a soft marine deposit. The tests were performed following three procedures: construction, surcharge loading and consolidation. The soil stress, the accumulative settlement and the excess pore pressure at different locations in the field were monitored. The results indicated that, with the construction height increasing, the excess pore pressure caused by pile installations in the foundation soil decreased slightly and the pile-subsoil differential settlement increased insignificantly. When the differential settlement was relatively small, the soil arching effect developed rapidly as the differential settlement increased, also showing a partially mobilised characteristic. This partially mobilised arching was weakened under surcharge loading. During the consolidation procedure, the excess pore pressure dissipated remarkably, leading to a noticeable increase in the differential settlement. When sufficient differential settlement was reached, the partially mobilised soil arching developed to the fully mobilised state. At this state, the load-sharing ratio or the pile efficacy (ratio of load borne by the pile cap to the total load) remained steady. Furthermore, for the fully mobilised arching, the pile efficacy was well predicted by four analytical models.
AB - This study presents field investigations of a geosynthetic-reinforced pile-supported embankment for a transformer substation constructed on a soft marine deposit. The tests were performed following three procedures: construction, surcharge loading and consolidation. The soil stress, the accumulative settlement and the excess pore pressure at different locations in the field were monitored. The results indicated that, with the construction height increasing, the excess pore pressure caused by pile installations in the foundation soil decreased slightly and the pile-subsoil differential settlement increased insignificantly. When the differential settlement was relatively small, the soil arching effect developed rapidly as the differential settlement increased, also showing a partially mobilised characteristic. This partially mobilised arching was weakened under surcharge loading. During the consolidation procedure, the excess pore pressure dissipated remarkably, leading to a noticeable increase in the differential settlement. When sufficient differential settlement was reached, the partially mobilised soil arching developed to the fully mobilised state. At this state, the load-sharing ratio or the pile efficacy (ratio of load borne by the pile cap to the total load) remained steady. Furthermore, for the fully mobilised arching, the pile efficacy was well predicted by four analytical models.
KW - Embankments
KW - Field testing & monitoring
KW - Piles & piling
UR - http://www.scopus.com/inward/record.url?scp=85119495769&partnerID=8YFLogxK
U2 - 10.1680/jgeen.19.00136
DO - 10.1680/jgeen.19.00136
M3 - Journal article
AN - SCOPUS:85119495769
SN - 1353-2618
VL - 174
SP - 627
EP - 644
JO - Proceedings of the Institution of Civil Engineers: Geotechnical Engineering
JF - Proceedings of the Institution of Civil Engineers: Geotechnical Engineering
IS - 6
ER -