BGI grouting materials for improvement of the soft ground and apparatus for injecting the grouting materials and grouting method using the apparatus

摘要

PURPOSE: A rocket system for injecting grouting materials for the soft ground improvement is provided to prevent the uneven permeation of grouting materials by controlling the permeation pressure properly, and to heighten the strength of the ground and the water cut off efficiency of the ground. CONSTITUTION: The rocket system for injecting grouting materials for the soft ground improvement comprises: an outer pipe member(201) installed on the front of a rod to inject grouting materials and provided with a cylindrical through hole; an inner pipe member(202) interposed to the appointed depth of the outer pipe member(201) to have an appointed interval with the outer pipe member(201) and provided with a longitudinal through hole to feed grouting materials; and a screw member(203) installed into the outer pipe member(201) to stir up grouting materials through the inner pipe member(202) and the outer pipe member(201) and composed of a circular ring located to be adhered closely to the front of the inner pipe member(202), a screw unified with the circular ring and having an X-shaped continuous cross structure as much as the appointed length, and a central bar unified with the screw along the central axial line of the screw.