An Investigation of Time-Dependent Deformation Characteristics of Soft Dredger Fill. (8th July 2020)

• Record Type: Journal Article
• Authors: Wang, Wanying; Luo, Qingzi; Yuan, Bingxiang; Chen, Xiaoping
• Other Names: Zhao Yanlin Academic Editor.
• Is Part Of: Advances in civil engineering. Volume 2020(2020)
• Publication Date: 2020-07-08
• Subjects: Civil engineering -- Periodicals; Civil engineering; Periodicals; 624
• DOI: 10.1155/2020/8861260
• Languages: English
• ISSNs: 1687-8086

Abstract

Abstract : The creep characteristics of soft clays have been studied for decades. However, the lateral deformation of soils is not allowed during the commonly used one-dimensional consolidation tests, which cannot describe the real deformation features of soils in practice. On the other hand, the influence of drainage distance on the mechanical properties of soil is still controversial, classified as hypothesis A and hypothesis B . For a better understanding of deformation characteristics of soft clay, especially which in long-terms, a series of conventional oedometer tests as well as novel geometric confined consolidation tests was conducted on soft dredger fill. The results show that the secondary consolidation coefficient of the soil sample C α would increase firstly, followed by a small decrease with the increase of consolidation pressure generally. C α would decrease with the consolidation time and also be reduced by preloading. The strain at the completion of primary consolidation would increase with the drainage distance, but the C α would be affected little. Both compression index C c and C α of soft clay would reduce after preconsolidation, in which two parameters show an approximate linear relationship. The creep coefficient of soft clay under the geometric confinement C α ε k is larger than that under the oedometer test C αε . However, the trends of the relationship between the creep coefficient and loading are consistent regardless of the confinement conditions.