Open AccessAnalysis of Settlement Behaviour of Soft Ground Under Wide Embankment
Author(s) -
Xin Jiang,
Xiaoli Chen,
Yongguo Fu,
Hanyan Gu,
Jinming Hu,
Xing Qiu,
Yanjun Qiu
Publication year - 2021
Publication title -
the baltic journal of road and bridge engineering
Language(s) - English
Resource type - Journals
eISSN - 1822-4288
pISSN - 1822-427X
DOI - 10.7250/bjrbe.2021-16.543
Subject(s) - levee , geotechnical engineering , consolidation (business) , settlement (finance) , geology , finite element method , engineering , structural engineering , accounting , world wide web , computer science , business , payment
An elastoplastic numerical model for calculating the consolidation settlement of wide embankment on soft ground is established using PLAXIS finite element software to investigate the settlement behaviour of soft ground under the wide embankment. The distribution rules are analysed and compared to narrow embankments, such as surface settlements of ground and embankment, lateral displacement of soft ground at the foot of embankment slope and excess pore pressure in soft ground. The influence rule of elastic modulus of soft ground on the settlement of soft ground under wide embankment is discussed. The results show that the settlement distributions of wide and narrow embankments on soft ground are “W” and “V” shapes, respectively. The maximum settlement of wide embankment is near the foot of the embankment slope, which is unequal to the settlement at the centreline of the embankment. The lateral displacement distribution rules of soft ground are both “belly” shaped at the foot of two types of embankments slope. However, the lateral displacement of the wide embankment is larger in each corresponding stage. During the construction period, the excess pore pressure in the soft ground under the wide embankment is much higher than that of the narrow embankment, so the post-construction consolidation time of the wide embankment is longer. Moreover, the macroscopic settlement rule of the wide embankment is still the same with the increase of elastic modulus of soft ground.