Journal Published Online: 09 December 2024
Volume 53, Issue 1

Compression Deformation and Collapsibility of Loess Subgrade Formed by Different Compaction Methods

CODEN: JTEVAB

Abstract

Subgrades constructed from loess—a loose and porous material—demonstrate significant compressibility and collapsibility. To study these properties of loess subgrades, this article proposes a vertical vibration compaction method (VVCM) that provides a reliable simulation of field compaction and investigates the factors influencing the deformation characteristics of loess subgrade by VVCM-prepared specimens. The results show that the correlation between the compression modulus of loess samples prepared by VVCM and that of core samples obtained from the construction site is more than 85 %. In addition, the deformation resistance of the VVCM sample is better than that of the traditional quasistatic compaction method (QSCM) sample. Under the same compaction factor and water content, the compressive modulus of VVCM sample is at least 10 % higher and its collapsibility coefficient is 10 % lower than that of QSCM sample. With the increase in compaction factor, the compression modulus increases and the collapsibility coefficient decreases, indicating improved resistance to compressive deformation and reduced susceptibility to collapse in loess. With the increase in water content, the compression modulus and collapsibility coefficient decrease, reflecting greater compressibility and increased collapse resistance in loess.

Author Information

Jiang, Yingjun
Key Laboratory for Special Area Highway Engineering of the Ministry of Education, Xi’an, Shaanxi, China
Bai, Chenfan
Key Laboratory for Special Area Highway Engineering of the Ministry of Education, Xi’an, Shaanxi, China
Zhang, Yu
Key Laboratory for Special Area Highway Engineering of the Ministry of Education, Xi’an, Shaanxi, China
Fan, Jiangtao
Key Laboratory for Special Area Highway Engineering of the Ministry of Education, Xi’an, Shaanxi, China
Yi, Yong
Key Laboratory for Special Area Highway Engineering of the Ministry of Education, Xi’an, Shaanxi, China
Deng, Changqing
School of Civil Architectural Engineering, Shaoyang University, Shaoyang, Hunan, China
Pages: 19
Price: $25.00
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Stock #: JTE20240053
ISSN: 0090-3973
DOI: 10.1520/JTE20240053