Application of Jet Grouting for Geotechnical Challenges

Jet grouting employs the injection of a controlled amount of cement grout into the required volume of soil mass to improve the in situ ground. This ground improvement technique is applied for foundation modification and restoration works such as for waterproofing of dam foundations, confinement for excavations, underpinning of foundations, limiting subsidence over tunnels, etc. This technique can help improve the soil to support foundation loads with minimal settlement and function as excavation support or serve as both foundation and excavation support in a single operation. Such dual capability of the system increases the economic viability by saving time and cost. This paper briefly explains the limitations of various ground improvement methods, the applicability of jet grouting for various geotechnical engineering challenges, the importance of a field quality plan to achieve required design aspects. Case studies are presented that demonstrate the versatility of this emerging technology and its value as a cost-effective ground treatment tool.