Nguyen Thi Nu1, Do Minh Ngoc2This email address is being protected from spambots. You need JavaScript enabled to view it., and Vu Dinh Tho3
1Engineering Geological Department, University of Mining and Geology, Vietnam
2Dept. of Geotechnical Engineering, University of Transport Technology, Ha Noi, Viet Nam
3Dept. of Civil Engineering, University of Transport Technology, Ha Noi, Viet Nam
Received: December 7, 2023 Accepted: May 16, 2024 Publication Date: September 25, 2024
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
The soft soil of Long Phu thermal power plant in Soc Trang province of southern Vietnam was treated by the PVD incorporating surcharge and vacuum preloading method. To evaluate the effectiveness of this method, experimental in-situ research combined with laboratory tests were performed on soft soil before and after treatment. Laboratory tests included particle size analysis, physical properties test, consolidation compression tests, undrained unconsolidated compression (UU) and undrained consolidated (CU) triaxial tests. The insitu tests included static penetration tests, static penetration tests with measurement of pore water pressure (piezocone penetration tests), vane shear tests, and standard penetration tests. Based on experimental results, this article evaluated the changes in the physical and mechanical properties of soft soil. The experimental results indicated that the soil after improvement increases shear strength and decreases compression. The relationship between the physico-mechanical properties of soft soil and improved soil was established. It has shown the success of the improvement of soft soil by PVD’ incorporating surcharge and vacuum preloading in Vietnam.
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