Yamaguchi Kikai Kogyo Co., Ltd.

Nihon Sogo-bosui Co., Ltd.

Nihon Soil Engineering Co., Ltd.

Takehiko Tokoro

Mineo Murata

Shoichi Kashima

A grout injection method and apparatus, characterized in that a grout comprised of two liquids and curable when the two liquids are combined are supplied, in a grout injection operation, to an injection pump, introduced through separate passages formed concentrically in the pipe, respectively, into an annular chamber formed within the pipe, and uniformly combined, contacted and mixed with each other in the annular mixing chamber before injection into the soil. The passages of the liquids communicating with the annular mixing chamber are blocked when the grout injection is not carried out.

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Iruma, Japan

Takehiko Tokoro