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:
Jul. 20, 1993
Filed:
Aug. 05, 1991
Hiroshi Yoshida, Tokorozawa, JP;
Mitsuhiro Shibazaki, Tokyo, JP;
Hiroaki Kubo, Nakamuraminami, JP;
Shunji Jinbo, Koyama, JP;
Kajima Corporation, Tokyo, JP;
Abstract
The present invention relates to a consolidating agent injecting apparatus having a nozzle mounted at the end of a pipe. The apparatus is inserted in a guide hole formed in the ground and the nozzle injects a high pressure jet liquid in a radial direction. The injecting direction of the nozzle is downwardly inclined from the horizontal direction within a range from 15 to 45 degrees. The present invention also relates to a ground improving injecting apparatus having first and second nozzles, mounted at the end of a pipe, for injecting a high pressure liquid and a ground improving injection liquid. The first nozzle comprises a plurality of annularly-arranged nozzles. The pipe is inserted into a hole dug in the ground and the high pressure liquid and the ground improving injection liquid are injected from the first and second nozzles. As the pipe is drawn up from under the ground, the ground is dug and grouted and the ground improving injection liquid is injected to form an underground columnar consolidation body and thereby improve the ground. The consolidating agent injecting apparatus and ground improving injection apparatus of the present invention form a consolidation body of a large section area for improvement of the ground, without transitions of the jet streams to turbulent flow.