Abstract
Fundamental laboratory test has been performed to establish Fracture Direction Controlled (FDC) Grouting with which vertical fracture perpendicular to flow direction of river is produced. By use of an injection pipe with 30cm-long vertical slits, vertical fracture can be formed in the expected direction in a homogeneous and K0-conditioned specimen. In case of real injection works, void between an injection pipe and a borehole wall has to be filled with sealing materials. An expected fracture can also be produced under the above-mentioned condition.
