Jet grouting design manual

Design and Control analyzes the typical jet-grouted structures, such as foundations, earth retaining walls, water cut-offs, bottom plugs and tunnel supports, and serves as a practical manual for the correct use of jet grouting technology. The Jet grouting Contractor must have at least five years jet grouting experience over the last ten years; and have completed at least five (5) Jet Grouting projects, with at least two (2) projects having objectives and jet-grouting system (single, double or triple) similar to those of this project and in the same type of soil. Jet Grouting Procedures- method of drilling, jet grouting (i.e. single, double, triple, jet systems). Fluid injection pressure(s), rotational speed and withdraw rate for jet grouting through the soil strata. F. Material properties, sources, and (manufacturer’s) certificates of quality. G. Control of drainage, spills, wastes, etc. H. Clean-up.

This paper describes the process whereby jet grouting design is progressed from an initial concept through detailed design and finally execution. It is important to understand the derivation of each stage of the design and which party is responsible to allow for any problems to be remedied. 1. Design criteria Introduction At the design stage there is a lack of reliable methods for predicting the diameter of jet grouted columns, as pointed out by Croce Flora () in a comprehensive review of current concepts and design rules as regards single-fluid jet grouting. This probabilistic met hod provides a rational design procedure for jet grouting cut-offs. In fact, once the total lengt h of the cut-off is established, as well as its minimum desired thickness.

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