Jet grouting experience in river borne materials (RBM)

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Publication Title
Jet grouting experience in river borne materials (RBM)

Abstract
This paper elaborates a real-time, full-scale, hands-on field experience of jet grouting in river borne materials (RBM). An earthen dyke of approximately 320 m length and15 m height was constructed with available river borne material (RMB) on riverbed and riverbanks. The key function of this dyke was to isolate the working front in the spillway and plunge pool area from flowing river water just downstream of a rock fill dam of a hydropower project in India. Sieve analysis of RBM showed it as gravely sand with very less fine. To check the efficacy of jet grouting the cylindrical cores are drilled and tested. Unconfined compressive strength of cylindrical cores varies from 8 to 10 MPa, which is well comparable to similar results reported worldwide. Analysis of jet grouting parameters e.g. grouting rate and pressure, properties of grout and spoil, UCS of grout and spoil, cement intake etc. is done across the length of the dyke. Jet grouting methodology, materials, test results, effectiveness, challenges faced, comparison with similar works are detailed in this paper. This experience shall reinforce the confidence of practicing engineers and academician in adopting jet grouting technology in highly variable and porous materials like RBM.
Authors
A. C. Joshi; Ar Vind; V. A. Sawant

Published In

18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)

Theme

E - Environment, water and energy

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