Study on the loess soil improved by soil-cement columns for wind turbine foundation

Phuc Dinh Hoang, Dinh Cong Nguyen, Thuc Viet Chu, Faculty of Civil Engineer, Hanoi University of Mining and Geology, Vietnam Faculty of Civil Engineer, University of Transport and Communications, Vietnam Falculty of Civil Engineering, Electric power University, Vietnam
2020 Journal of Mining and Earth Sciences  
The paper presents the foundation solution for wind turbine in the extreme geotechnical condition. With the features of loose and foam loess and easier to settle when wet condition, it needs improving before construction. In the scope of the paper, the deep mixing soil-cement column combined of soil-cement load transfer layer for loess improvement is proposed. Additionally, the sequence of settlement prediction is described, and the two cases of column distance are 2 m and 1,5 m, the diameters
more » ... f column range from 0,5 to 0,8 m are analysed. Moreover, the cement mixing ratio in loess is considered. The analytical results indicate that the settlement of wind turbine foundation is lower the the limited settlement (78,51 mm less than 80 mm) when the load transfer layer equals 1,5 m and the improvement ratio (Ac/A) of 0,145 and the cement/soil mixture ratio of 6%.
doi:10.46326/jmes.htcs2020.15 fatcat:aj7h7t2hqfcjnl6v5o6u4l4uda