Patents Assigned to Chemical Grout Company, Limited
  • Process for the high-pressure grouting within the earth and apparatus adapted for carrying out same
    Patent number: 4084648
    Abstract: This invention concerns with a high pressure grouting process. For lateral cutting of earth in the ground, a high speed core water jet, having its injection velocity equal to at least a half of the sonic one and surrounded by an air ring jet is used. For solidifying the crushed earth, a cement milk is used which is poured separately and at a lower level than that of the air-water combined jet into the space in the ground which space has been formed by the action of the core water jet.
    Type: Grant
    Filed: February 11, 1977
    Date of Patent: April 18, 1978
    Assignees: Kajima Corporation, Chemical Grout Company, Limited
    Inventors: Teruo Yahiro, Hiroshi Yoshida