Jet grouting device with rotating roller bearing within casing pipe and rotating pipe

Abstract

A high pressure jet grouting device generally employed with a portable stand comprised of a vertically adjustable shelf forming a platform for attaching an air motor, reduction gearing box and a releasable right angle gear box. High pressure air is pumped to the air motor and a grouting pump, the air pressure is used to turn the right angle gear and a rotatable pipe inside a casing pipe. The grouting material under pressure from the air compressor is pumped through a hose to a swivel connection on the end portion of a rotating pipe to inject the grout into the ground from a spray nozzle located at the opposite end of the rotating pipe inserted in the ground. A rotating roller bearing is provided between casing pipe and the rotating pipe. The device is small and does not require a heavy drill rig as the drilling operation is separately performed from the grouting process.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Provisional Patent Application No. 61 / 258,617 filed on Nov. 6, 2009, in the United States Patent & Trademark Office, the disclosure of which is incorporated herein by reference.STATEMENT OF FEDERALLY SPONSORED RESEARCH / DEVELOPMENT[0002]Not ApplicableBACKGROUND OF THE INVENTION[0003]Jet grouting has been used to stabilize contaminated soils, create groundwater barriers and to underpin distressed foundations. Jet grout construction uses a rotating and rising drill rod with small nozzles that direct the grout horizontally to form columns of soil crete or soil-cement and is the only type of grouting that is capable of treating all types of soils from clays to gravel. Jet grouting is also useful in grouting isolated zones of soil and for grouting around and below buried utilities. Jet grouting is a general term describing various construction techniques used for ground modification or ground improvement. G...

AI Technical Summary

Benefits of technology

"The present invention is a small and portable device that can be operated by two people to stabilize unstable ground formations. It uses high-pressure injection to force a grouting material out of a casing pipe through a spray nozzle. The device is designed to be used in confined areas such as subway tunnels, sewers, and underground parking garages. It offers a solution for stabilizing ground formations without the need for heavy and large machines that are not easily transportable."

Problems solved by technology

Thus, the ball begins to spin within the ball seat 2 thus hampering the milling or drilling operation.

Furthermore, even though these innovations may be suitable for the specific individual purposes to which they address, accordingly, they would not be suitable for the purposes of the present invention as heretofore described.

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