Abstract:
A Full Scale Field Trial (FSFT) is typically conducted before production jet grouting commences. The FSFT allows the Contractor to commission his means, methods, and equipment, and allows him to demonstrate that his choice of jetting system and parameters will provide treated elements which satisfy the specified requirements. However, such FSFT’ s often do not have a satisfactory outcome either from the technical or contractual viewpoints. Given that an FSFT will typically be on the critical path of a project, any problem encountered can have an impact on the overall project far greater than its actual cost. This paper provides advice to Owners, Engineers, and Contractors involved in the design, execution, analysis, and acceptance of FSFT’ s. It is not a specification, but more a commentary on good and sensible practice, designed to avoid disputes. The paper is based on a compendium of personal observations and experiences – good and bad – and so does not cite specific projects.