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Effect of Grouting of Floating Sand Columns in Soft Clay Soils Replaced Partially by Geogrid Reinforced Sand
https://orcid.org/http://orcid.org/0000-0002-4356-651X
Stone columns and sand layers reinforced with geosynthetics are effective methods for improving the performance of foundations placed on soft clay soil. Stone columns increase the load-carrying capacity by using the soil’s natural circumferential confinement. The issue of sand columns bulging was solved by grouting these columns, which resulted in extremely robust and solid columns. The pressure of the grouting column works to generate pressure from the column towards the soil increase the force of friction and fill all voids and cavities in the event of its presence in the soil. It was concluded that grouted sand columns can moderately improve the bearing capacity ratio (BCR) of a soft clay bed, increasing it to 1.9 within the optimal length and spacing of the footing area, without using a sand cushion. The BCR is defined as the ratio of the bearing capacity (q) of reinforced soil to that of unreinforced soil at specific s/B ratios, where s/B represents the ratio of footing settlement to footing width. Grouted sand columns and geogrid reinforcement increase bearing capacity by 3.6 times if the grouted sand columns are within the footing area, 4.2 times if one row is installed outside the footing, and 4.5 times if two rows are installed outside the footing, assuming H/B = 1 (H = thickness of sand cushion, B = footing width). At H/B = 1.5, the bearing capacity ratios increase by 5.2 times when the grouted sand columns are within the footing area, 6.4 times if one row is installed outside the footing, and 7.5 times if two rows are installed outside the footing.
Effect of Grouting of Floating Sand Columns in Soft Clay Soils Replaced Partially by Geogrid Reinforced Sand
https://orcid.org/http://orcid.org/0000-0002-4356-651X
Stone columns and sand layers reinforced with geosynthetics are effective methods for improving the performance of foundations placed on soft clay soil. Stone columns increase the load-carrying capacity by using the soil’s natural circumferential confinement. The issue of sand columns bulging was solved by grouting these columns, which resulted in extremely robust and solid columns. The pressure of the grouting column works to generate pressure from the column towards the soil increase the force of friction and fill all voids and cavities in the event of its presence in the soil. It was concluded that grouted sand columns can moderately improve the bearing capacity ratio (BCR) of a soft clay bed, increasing it to 1.9 within the optimal length and spacing of the footing area, without using a sand cushion. The BCR is defined as the ratio of the bearing capacity (q) of reinforced soil to that of unreinforced soil at specific s/B ratios, where s/B represents the ratio of footing settlement to footing width. Grouted sand columns and geogrid reinforcement increase bearing capacity by 3.6 times if the grouted sand columns are within the footing area, 4.2 times if one row is installed outside the footing, and 4.5 times if two rows are installed outside the footing, assuming H/B = 1 (H = thickness of sand cushion, B = footing width). At H/B = 1.5, the bearing capacity ratios increase by 5.2 times when the grouted sand columns are within the footing area, 6.4 times if one row is installed outside the footing, and 7.5 times if two rows are installed outside the footing.
Effect of Grouting of Floating Sand Columns in Soft Clay Soils Replaced Partially by Geogrid Reinforced Sand
https://orcid.org/http://orcid.org/0000-0002-4356-651X
Stone columns and sand layers reinforced with geosynthetics are effective methods for improving the performance of foundations placed on soft clay soil. Stone columns increase the load-carrying capacity by using the soil’s natural circumferential confinement. The issue of sand columns bulging was solved by grouting these columns, which resulted in extremely robust and solid columns. The pressure of the grouting column works to generate pressure from the column towards the soil increase the force of friction and fill all voids and cavities in the event of its presence in the soil. It was concluded that grouted sand columns can moderately improve the bearing capacity ratio (BCR) of a soft clay bed, increasing it to 1.9 within the optimal length and spacing of the footing area, without using a sand cushion. The BCR is defined as the ratio of the bearing capacity (q) of reinforced soil to that of unreinforced soil at specific s/B ratios, where s/B represents the ratio of footing settlement to footing width. Grouted sand columns and geogrid reinforcement increase bearing capacity by 3.6 times if the grouted sand columns are within the footing area, 4.2 times if one row is installed outside the footing, and 4.5 times if two rows are installed outside the footing, assuming H/B = 1 (H = thickness of sand cushion, B = footing width). At H/B = 1.5, the bearing capacity ratios increase by 5.2 times when the grouted sand columns are within the footing area, 6.4 times if one row is installed outside the footing, and 7.5 times if two rows are installed outside the footing.
Effect of Grouting of Floating Sand Columns in Soft Clay Soils Replaced Partially by Geogrid Reinforced Sand
Transp. Infrastruct. Geotech.
Al-Khafaji, Muthanna A. (author) / Fattah, Mohammed Y. (author) / Al-Recaby, Makki K. (author)
2025-02-01
Article (Journal)
Electronic Resource
English
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