Research to build technological procedure for soft ground improvement using sea sand-cement-fly ash column
- Authors: Thinh Duc Ta 1*, Phuc Dinh Hoang 1, Thang Anh Bui 1, Trang Huong Thi Ngo 1, Diu Thi Nguyen 2
1 Faculty of Civil Engineering, Hanoi University of Mining and Geology, Vietnam
2 University of Transportation and Communications, Vietnam
- Keywords: Improvement, Reinforcement, Sea sand-cement-fly ash column, Soft ground, Technological procedure.
- Received: 15th-Oct-2020
- Revised: 23rd-Nov-2020
- Accepted: 31st-Dec-2020
- Online: 31st-Dec-2020
- Section: Civil Engineering
Sea sand-cement-fly ash column technology for soft soil treatment is a new technology in the process of completing the theoretical basis, the experimental basis, and the construction of the ground treatment technological procedure. The paper presents the results of scientific research on design, calculation, construction, and acceptance of sea sand-cement-fly ash column. The scientific basis for the design of column is to consider the role of the column in composite ground, that is to use the column as soft ground improvement or soft soil reinforcement. The important parameters for the column design are: cement and fly ash content; column length; column diameter; number of columns; distance among columns; load capacity and settlement of composite ground. The sequence of steps of construction and acceptance of column includes: selection of construction equipment, preparation of construction sites, trial construction, official construction, evaluation of ground quality after treatment and preparation of document for acceptance.