International Journal for Research in Applied Science & Engineering Technology (IJRASET)

ISSN: 2321-9653; IC Value: 45.98; SJ Impact Factor: 7.538

Volume 11 Issue IV Apr 2023- Available at www.ijraset.com

ISSN: 2321-9653; IC Value: 45.98; SJ Impact Factor: 7.538

Volume 11 Issue IV Apr 2023- Available at www.ijraset.com

The CBR Value at 2.5mm and 5mm penetration are then obtained to understand the behaviour. A comparison is then made with respect to the investigational results as shown below in figure.7.

From the experimental results, it can be clearly understood that stone columns can significantly increase the bearing capacity of the soil. The bearing capacity of the soil can be improved by up to 5 times for an acceptable settlement of 10mm using stone column with the help of recycled materials. The CBR value at 2.5 mm penetration increased from 5.02 to 22.5 for normal soil to improved soil respectively. The CBR value at 5 mm penetration increased from 4.71 to 18.88 for normal soil to improved soil respectively. It can be observed from the comparison curves that the settlement is controlled by a larger margin of load for the improved soil.

IV. CONCLUSION

From the experiment conducted and comparative graphs plotted, the following conclusions are made:

1) The bearing capacity of the soil can be improved by up to 5 times for an acceptable settlement of 10mm using stone column with the help of recycled materials.

2) A significant improvement in strength over 4 to 4.5 times the normal site-specific soil can be observed with improvement by stone column with recycled waste. Despite lesser value than general stone column material, recycled waste can be off good use for small scale works.

3) Recycled waste material as additive in the stone column indicate better performance and are reliable material as they are easily available, and cost-effective material

4) Stone columns can also reduce the settlement of the soil up to 90% or even more in some cases.

5) Other recycled materials, such as the demonstrated waste material, Crushed concrete, recycled aggregates, tyre chips, railroad ballast, and crushed glass may have significant potential for usage in the building of stone columns.

In summary, the experimental results of stone column testing suggest that they can be an effective method for improving the loadbearing capacity and reducing the settlement of soft soils. However, the design of stone columns should be carefully considered based on the soil properties and applied loads to achieve the desired performance.

References

[1] Adalier, K., Elgamal, A., Meneses, J., & Baez, J. I. (2003). Stone columns as liquefaction countermeasure in non-plastic silty soils. Soil Dynamics and Earthquake Engineering, 23(7), 571–584. https://doi.org/10.1016/s0267-7261(03)00070-8

[2] Chegg.com. Definition of Settlement Of Structure | Chegg.com. (n.d.). Retrieved April 7, 2023, from https://www.chegg.com/homeworkhelp/definitions/settlement-of-structure-8

[3] Chen, J.-F., Wang, X.-T., Xue, J.-F., Zeng, Y., & Feng, S -Z. (2018). Uniaxial compression behavior of geotextile encased stone columns. Geotextiles and Geomembranes, 46(3), 277–283. https://doi.org/10.1016/j.geotexmem.2018.01.003