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Reclamation and Ground Improvement of Soft Marine Clay for Development of Offshore Terminal 4, JNPT, Navi Mumbai

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Abstract

A container yard of around 100 Ha area was developed as part of the fourth terminal for Jawaharlal Nehru Port Trust (JNPT) in Navi Mumbai by means of reclamation in sea over soft, compressible marine clay. Ground improvement of the subsoil was warranted in order that the finished reclamation satisfies the stringent serviceability criteria.

Extensive offshore geotechnical investigation campaign comprised conventional borehole sampling, laboratory tests and various in situ field tests such as CPTu, field vane shear tests, etc. Investigations revealed clay thicknesses of 4 m–22 m, with top layer showing undrained shear strengths less than 7 kPa and increasing with depth, underlain by weathered basalt. The ground was improved using prefabricated vertical drains (PVDs) with preloading. Radial consolidation and cone dissipation tests were carried out to establish the coefficient of horizontal consolidation (ch).

The marine reclamation is confined on all sides by a perimeter bund with revetment, Stability analyses carried out for this bund showed that it was necessary to have overfill beyond the reclamation cope line along with tension geotextiles so as to achieve the prescribed factors of safety against slope failure. After removal of the preloading, the overfill was cut back to the final geometry and revetment was provided along the perimeter.

Extensive geotechnical instrumentation and monitoring were conducted using multilevel magnetic extensometers, settlement gauges, inclinometer and piezometers to monitor the behaviour and performance of ground improvement. Field ch and smear coefficients were back-calculated.

Around 200 confirmatory boreholes (CBH) were carried out after completion of ground improvement to ascertain the post-improvement and validate the design parameters, thus eliminating the risk of post-construction settlement.

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References

  1. Manohar Varma G, Sravan Kanumuri, Ashok Kumar M (2016) Geotechnical investigations for reclamation of Mumbai port. In: Indian geotechnical conference, Chennai

  2. Mesri G, Godlewski PM (1977) Time- and stress-compressibility interrelationship. J Geotech Eng Div ASCE 103(5):417–430

    Article  Google Scholar 

  3. Teh CI, Houlsby GT (1991) An analytical study of the cone penetration test in clay. Geotechnique 41(1):17–34

    Article  Google Scholar 

  4. Jeevan Reddy, Pitchumani NK and Aminul Islam (2016) Stability analyses for reclamation bund on soft clay. In: Indian geotechnical conference, Chennai

  5. IS 15284 Part 2 (2004) Design and construction for ground improvement – Guidelines

  6. Geo-Slope International Ltd. (2012) Stability modelling with Slope/W Manual

  7. IITK-GSDMA (2007) Guidelines for seismic design of earth dams and embankments

  8. IS (1893) Part 1 (2002) Criteria for earthquake resistant design of structures. Bureau of Indian Standards, New Delhi

    Google Scholar 

  9. Indraratna B, Bamunawita C, Redana IW, McIntosh G (2003) Modelling of prefabricated vertical drains in soft clay and evaluation of their effectiveness in practice. Ground Improv 7(3):127–137

    Article  Google Scholar 

  10. Ashok Kumar M, Pitchumani NK, Aminul Islam (2016) Back analyses of PVD performance in Mumbai port. In: Indian geotechnical conference, Chennai

  11. Sridharan A, Murthy NS, Prakash K (1987) Rectangular hyperbola method of consolidation analysis. Geotechnique 37(3):355–368

    Article  Google Scholar 

  12. Asaoka A (1978) Observational procedure of settlement prediction. Soils Found 18(4):87–101

    Article  Google Scholar 

  13. Hansbo S (1979) Consolidation of clay by band-shaped prefabricated drains. Ground Eng 12(5):16–25

    Google Scholar 

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Acknowledgement

We thank the entire AECOM team for having put in their full efforts in the design of every component of the project. We are thankful to ITD Cementation Ltd. for executing the project with the greatest diligence and professionalism. We are thankful to the consultants of the owner for ensuring top quality and robust designs from AECOM.

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Authors and Affiliations

  1. AECOM India Pvt. Ltd, ASV Ramanas Tower, 3rd Floor, Venkatanarayana Road, T. Nagar, Chennai, 600017, India

    Kumar Pitchumani N

  2. ITD Cementation India Ltd, National Plastic Building, Subhash Road, Villeparle East, Mumbai, 400057, India

    Aminul Islam

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  1. Kumar Pitchumani N
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  2. Aminul Islam
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Correspondence to Kumar Pitchumani N.

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Pitchumani N, K., Islam, A. Reclamation and Ground Improvement of Soft Marine Clay for Development of Offshore Terminal 4, JNPT, Navi Mumbai. Indian Geotech J 51, 502–519 (2021). https://doi.org/10.1007/s40098-021-00521-y

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  • DOI: https://doi.org/10.1007/s40098-021-00521-y

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