Performance of Encased Silica-Manganese Slag Stone Columns in Soft Marine Clay
Stone columns are the most suitable and economical ground improvement technique for soft soils. Stone columns accelerate the consolidation process, thereby increase the stiffness of the soil. This increase may not be sufficient because of the less lateral confinement, which leads to excessive bu...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Indonesia
2019-10-01
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| Series: | International Journal of Technology |
| Subjects: | |
| Online Access: | http://ijtech.eng.ui.ac.id/article/view/2094 |
| Summary: | Stone
columns are the most suitable and economical ground improvement technique for
soft soils. Stone columns accelerate the consolidation process, thereby
increase the stiffness of the soil. This increase may not be sufficient because
of the less lateral confinement, which leads to excessive bulging. The strength
of the composite soil can also be increased further by encasing the column with
geotextile. In this paper, model tests were conducted on end-bearing stone
columns with geotextile encasement and compared with the unreinforced (plain) stone
columns. The stone columns were prepared by placing the silica-manganese slag,
sand and were reinforced with geotextile with different encasement lengths of
D, 2D, 3D, and 4D (D is the stone column diameter; i.e., 5 cm). The tests
demonstrated that the engineering behavior of the soil was improved by
introducing the silica-manganese slag (when compared with conventional stone
columns) and also with encasement. Bulging can also be reduced by providing
encasement beyond the zone of bulging. |
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| ISSN: | 2086-9614 2087-2100 |