Combined prefabrication vertical drain (PVD) with variable preloading and vacuuming method to improve soft ground in the Mekong Delta

Authors

  • Thang Ngoc Nguyen  Faculty of Engineering Technology, Tien Giang University, Tien Giang Province, Vietnam
  • Tuan Anh Nguyen  Institue of Civil Engineering, Ho Chi Minh City University of Transport, Ho Chi Minh City, Vietnam
  • Nhan Tri Vo Tran  Long An University of Economics and Industry, Long An Province, Vietnam

DOI:

https://doi.org/10.32628/IJSRSET23103140

Keywords:

PVDs, vacuum, consolidation, soft ground, Mekong Delta

Abstract

The treatment of the foundation of construction works on weak soil often raises issues that need to be resolved such as: the low load-bearing capacity of the ground, the large settlement, and stability of the large area. As a result, it is important to develop appropriate methods to treat the foundation of construction works on weak soil. Dealing with weak soil is a pressing issue in the construction industry. Currently, there are various measures that can be adopdetd to increase the soil durability and reduce settlement of construction works such as: reinforced concrete piles, sheet piles, bored piles, cushion of loose materials, soil mixing with cement or lime, and preloading with vertical drainage. The method, which uses a prefabrication vertical drain (PVD) combined variable preloading and vacuuming, has not been widely studied and implemented. This paper proposes a solution, which incorporates preloading and vacuuming in the PVD, to process weak soil in the residential areas of the Mekong Delta region. The results show that the settlement of weak soil at the core of the embankment is 2.36m after 135 days using the PVD with variable preloading and vacuuming. The safety factor is 1.295.

References

  1. Nguyen, A. T. and Nguyen, N. T. (2020). Study on Stress Distribution in Soft Ground Consolidated with Deep Cement Mixing Columns under Road Embankment. Civil Engineering and Architecture, Vol. 8, No. 6, pp. 1251-1265.
  2. Nguyen, N. T. and Nguyen, A. T. (2022). A study on the calculation of deformation of cement deep mixing columns that stabilize soil erosion and landslides on river roads. International Journal of GEOMATE, Vol. 23, Iss. 100, pp. 52-61.
  3. Barron, R. A., Consolidation of Fine-Grained Soils by Drain Wells. Transactions of ASCE, Vol. 113, 1948, pp. 718-742.
  4. Yoshikuni, H. and Nakanodo, H., Consolidation of Soils by Vertical Drain Wells with Finite Permeability. Soils and Foundations, Vol. 14, Iss. 2, 1974, pp. 35-46.
  5. Hansbo, S., Consolidation of clay by bandshaped prefabricated drains. Ground engineering, Vol. 12, Iss. 5, 1979.
  6. Onoue, A., Consolidation by Vertical Drains Taking Well Resistance and Smear into Consideration. Soils and Foundations, Vol. 28, Iss. 4, 1988, pp. 165-174.
  7. Holtz, F. And Johannes, W., Genesis of Peraluminous Granites I. Experimental Investigation of Melt Compositions at 3 and 5 kb and Various H2O Activities. Journal of Petrology, Vol. 32, Iss. 5, 1991, pp. 935–958.
  8. Nguyen, T. N. et al., A simple solution for prefabricated vertical drain with surcharge preloading combined with vacuum consolidation. Geotextiles and Geomembranes, Vol. 49, Iss. 1, 2021, pp. 304-322.
  9. Pengpeng, N., Effect of vacuum removal on consolidation settlement under a combined vacuum and surcharge preloading. Geotextiles and Geomembranes, Vol. 47, Iss. 1, 2019, pp. 12-22.
  10. Bergado, D. T., Case study and numerical simulation of PVD improved soft Bangkok clay with surcharge and vacuum preloading using a modified air-water separation system. Geotextiles and Geomembranes, Vol. 50, Iss. 1, 2022, pp. 137-153.
  11. Wu, J. et al., Combined vacuum and surcharge preloading method to improve lianyungang soft marine clay for embankment widening project: A case. Geotextiles and Geomembranes, Vol. 49, Iss. 2, 2021, pp. 452-465.
  12. Wang, P. et al, Apparent clogging effect in vacuum-induced consolidation of dredged soil with prefabricated vertical drains. Geotextiles and Geomembranes, Vol. 48, Iss. 4, 2020, pp. 524-531.
  13. Wang, J. et al., Effect of surcharge loading rate and mobilized load ratio on the performance of vacuum–surcharge preloading with PVDs. Geotextiles and Geomembranes, Vol. 47, Iss. 2, 2019, pp. 121-127
  14. Feng, S. et al., The reinforcement analysis of soft ground treated by thermal consolidation vacuum preloading. Transportation Geotechnics, Vol. 31, 2021.
  15. Engineering Geological Report (2022), Project at My Tho city - Tien Giang province, Vietnam. LAS-XD 1513.

International Journal of Scientific Research in Science, Engineering and Technology

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Published

2023-06-30

Issue

Volume 10, Issue 3, May-June-2023

Section

Research Articles

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
Thang Ngoc Nguyen, Tuan Anh Nguyen, Nhan Tri Vo Tran "Combined prefabrication vertical drain (PVD) with variable preloading and vacuuming method to improve soft ground in the Mekong Delta" International Journal of Scientific Research in Science, Engineering and Technology (IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 10, Issue 3, pp.455-463, May-June-2023. Available at doi : https://doi.org/10.32628/IJSRSET23103140