Comparative Study of the Field Performances of Pressure-Grouted Micropiles Using Gravity and Packers

When underground space requires excavation in areas below the water table, foundation system suffers from buoyancy, which leads to uplifting of superstructure. A deep can be used; however, cases where a hard layer is encountered, high driving forces and corresponding noises cause civil complaints urban areas. Micropiles an effective alternative option, due their performance despite short installation depth. Pressurized grouting used with packer induce higher interfacial properties between micropile soil. In this study, field micropiles installed using gravitational or pressure-grouted either geotextile rubber was comparatively evaluated by tension creep tests. were pressure weak fractured zones. As results, showed more stable stronger behaviors than ones grouting. Moreover, better one packer.