Jet-Grouting: A Wide Range of Applications-Paper

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Jet grouting is a ground-improvement technique that uses high-pressure fluid jets to erode and mix in-situ soil with grout, forming soil-cement columns with increased strength and reduced permeability. Unlike auger-based soil mixing, it can create large subsurface elements using relatively small drilling equipment. Single-, double-, and triple-fluid systems allow the process to be adapted to different soils and project needs.<br /><br />The paper describes applications in environmental remediation and construction. For in-situ stabilization/solidification of contaminated soils, jet grouting treated coal-tar-impacted material in a confined gas-holder annulus and stabilized mercury-contaminated soils beneath building footings, avoiding difficult excavation. For groundwater control, overlapping columns formed cutoff walls at an active manufactured-gas plant and supported excavation and groundwater management for urban subway construction.<br /><br />Jet grouting can also complement slurry walls, sheet piles, and other ground-improvement methods. Case studies show it used to connect barrier-wall sections and seal around utilities, obstructions, and sheet piles where conventional methods were impractical or risked damaging infrastructure.<br /><br />The technique is valuable because it works across varied soil conditions and in restricted, complex sites, including areas near utilities and existing structures. Its limitations include the specialized equipment and expertise required, which can make it more costly and time-consuming than some alternatives. Overall, the case studies demonstrate jet grouting’s flexibility for soil stabilization, contaminant containment, groundwater cutoff, and excavation support. The paper notes that continued advances in equipment and methods may improve its efficiency and reduce costs.

Keywords

jet grouting

ground improvement

soil stabilization

soil-cement columns

contaminant containment

groundwater cutoff

environmental remediation

excavation support

cutoff walls

subsurface treatment