A Laboratory Experimental Study on the Performance of Jet Grout Columns Optimized by Taguchi Method
Öz
The primary objective of this study is to investigate the influence of manufacturing parameters on the mechanical performance of jet grout (JG) columns and to optimize these parameters using statistical design. The increasing demand for infrastructure on weak soils has made JG a widely adopted ground improvement technique for enhancing bearing capacity and reducing settlement. Four major manufacturing parameters—grout pressure, rod pull-out speed, rod rotation speed, and water/cement (W/C) ratio—were examined at three levels using the Taguchi L9 orthogonal array design. A custom-designed laboratory-scale JG system was developed to replicate field conditions. A total of 18 JG columns were produced. Column diameter and unconfined compressive strength (qu) were measured on core samples extracted from each column. The results showed that grout pressure was the most influential factor on column diameter (43%) and also on unconfined compressive strength (36.5%). Higher W/C ratios and pull-out speeds led to decreased strength and column homogeneity, while increased rod rotation speed enhanced strength but slightly reduced diameter. Core sample analysis revealed a significant reduction in strength from the core center to the outer edges. Optimal performance was achieved with low pull-out speeds and moderate rotation rates. The study highlights the critical role of optimized parameter selection in improving JG column performance. Future research should explore larger-scale field experiments across varied soil types. Investigating eco-friendly binders and advanced nozzle designs is also recommended to enhance both environmental and mechanical performance.
Anahtar Kelimeler
Jet grout columns, Taguchi method, Soil improvement, JG injection pressure JG pull out-rotataion speed
Destekleyen Kurum
This study was supported by the Selçuk University Scientific Researcher Project Coordinatorship project coded 11101027.
Proje Numarası
11101027
Etik Beyan
This study is derived from the Ph.D. dissertation of Dr. İbrahim Hakkı ERKAN. His esteemed doctoral advisor, Prof. Dr. Özcan TAN, passed away on January 6, 2020. This work is dedicated to the cherished memory of Prof. Dr. Özcan TAN, who will always be remembered with deep respect and gratitude for his academic legacy, guidance, and profound humanity. This study was supported as part of the Ph.D. dissertation project of İbrahim Hakkı Erkan by the Scientific Research Projects (BAP) Coordinatorship of Selçuk University. The authors would also like to express their gratitude to TÜBİTAK for their valuable support.
Teşekkür
TÜBİTAK
Kaynakça
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