Land reclamation method and equipment involving the introduction

Details Land reclamation method and equipment involving the introduction Land reclamation method and equipment involving the introduction

1995-10-30

1997-04-29

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Chemical

405263, 405266, E02D 312

Patent

active

056242093

ABSTRACT:
A soil decontamination method uses a drilling rod having an outer pipe with a closed lower end and a radially extending outlet nozzle near the lower end. The outer pipe has an outer surface which is free of structures so that the outer pipe moves smoothly in a hole. An inner pipe is co-axially positioned in the outer pipe, the inner pipe having a lower closed end with a radially extending nozzle which is co-axial with, and spaced inwardly from the nozzle of the outer pipe. A drill bit is on an outer surface of a lower end of the outer pipe. A hole is drilled into a layer of soil using the bit. With the bit in the hole, a dry mixture of air and solid aggregate particles under relatively low pressure are supplied into a space between the outer and inner pipes and a high pressure fluid is supplied into the inner pipe under a relatively high pressure, the high pressure fluid leaving the nozzle of the inner pipe and taking with it some of the dry mixture which passes out of the outer pipe through the nozzle of the outer pipe to disaggregate and mix with and decontaminate soil of the layer around the hole.

REFERENCES:
patent: 4606675 (1986-08-01), Mitani et al.
patent: 4624606 (1986-11-01), Nakanishi et al.
patent: 4659259 (1987-04-01), Reed et al.
patent: 4786212 (1988-11-01), Bauer et al.
patent: 4971480 (1990-11-01), Nakanishi
patent: 5006017 (1991-04-01), Yoshida et al.
patent: 5217327 (1993-06-01), Nakanishi
patent: 5228809 (1993-07-01), Yoshida et al.

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