The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 1978
Filed:
Feb. 11, 1977
Applicant:
Inventors:
Teruo Yahiro, Tokyo, JA;
Hiroshi Yoshida, Tokorozawa, JA;
Assignees:
Kajima Corporation, Tokyo, JA;
Chemical Grout Company, Limited, Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; E02D / ;
U.S. Cl.
CPC ...
175 67 ; 61 3 / ; 166 73 ; 166223 ; 166290 ;
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.