Research on Horizontal Coefficient of Consolidation of Vietnam’s Soft Soil

Autor: Nu Nguyen Thi, Bui Truong Son, Do Minh Ngoc
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of Engineering, Vol 2020 (2020)
Druh dokumentu: article
ISSN: 2314-4904
2314-4912
DOI: 10.1155/2020/3697689
Popis: The horizontal coefficient of consolidation is the most important parameter for designing the improvement of soil soft by prefabricated vertical drains (PVDs) combined with surcharge and vacuum preloading. This paper presents the experimental study on the horizontal coefficient of consolidation (ch) of some soft soils distributed in Vietnam. The ch value was determined by the laboratory test and CPTu dissipation test. The laboratory tests included the Rowe consolidation cell test and constant rate of strain consolidation with radial drainage test. Two types of consolidation laboratory tests were performed. The experimental results indicated that the ch value is always larger than the vertical coefficient of consolidation of soil (cv). The ratio of ch/cv depends on the consolidated pressure, type of soil, and the anisotropy of soil. The ratio of ch/cv is different in different types of soft soil in Vietnam. In the normally consolidated state, the ch/cv ratio ranges from 1.35 to 10.59. It was necessary to choose the ch value at the consolidated stress level for calculating the PVD spacing.
Databáze: Directory of Open Access Journals
Externí odkaz: