Analysis of Deformation Characteristics of Filled Subgrade Treated by Micro-Pile

Deformation control of fill subgrade is a difficult point in the field of highway engineering. This article relies on the treatment project of micro-piles for subgrade deformation of K555 + 070～K557 + 710 section of Qingdao-Yinchuan Expressway. Settlement and stress monitoring was carried out at the...

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Bibliographic Details
Published in:Advances in civil engineering 2021, Vol.2021 (1)
Main Authors: Gao, Xuhe, Tian, Weiping, Li, Jiachun, Qi, Hongliang, Zhang, Zhipei
Format: Article
Language:English
Subjects:
Civil engineering
Cracks
Deformation
Deformation analysis
Highway engineering
Life cycle analysis
Life cycles
Mathematical models
Micro piles
Monitoring
River networks
Road beds
Road shoulders
Roads & highways
Sea level
Shear strength
Simulation
Subgrades
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Summary:Deformation control of fill subgrade is a difficult point in the field of highway engineering. This article relies on the treatment project of micro-piles for subgrade deformation of K555 + 070～K557 + 710 section of Qingdao-Yinchuan Expressway. Settlement and stress monitoring was carried out at the toe of the roadbed, the shoulder, and the center of the roadbed. We use Midas/GTS modeling trial calculation. A new method to check the simulation results of the deviation rate is proposed. A calculation model of the stress and deformation of the subgrade in the whole life cycle is established. The results of comparative analysis, monitoring, and simulation are as follows. ① The compression and consolidation of the fill account for most of the settlement and deformation of the roadbed in the whole life cycle. ② Subgrade center settlement is the sensitive part of subgrade deformation. ③ After piles are added, the deformation extremes at the toe of the slope, the shoulder, and the center of the roadbed are all reduced by more than 96%. The research results can provide theoretical guidance for the analysis of the stress and deformation characteristics of the subgrade before and after the micro-pile treatment.
ISSN:1687-8086
1687-8094
DOI:10.1155/2021/5755796