Overview
The development of a "high-grip packer" and a "special sealing material ensuring both porous wall protection and chemical penetration" leads to reduce grouting loss during construction and to increase grouting efficiency.The methods can be utilized to prevent "leakage of chemical liquid from around the ground packer" and "injection inhibition of chemical liquid due to the collapse of the porous wall which is the penetration source of chemical liquid" which have been problems with the chemical grouting method of the ground packer method
