JPS58517A - Stirrer device for improving soft ground - Google Patents

Abstract

PURPOSE:To exactly adhere a soil stabilizer to the ground soil by a method in which the internal spaces of plural stirrer blades are connected with a communication tube and a granular soil stabilizer is jetted in multi-staged manner. CONSTITUTION:A soil stabilizer supply tube is inserted into the inside aperture 5 of a rotary shaft 1. A stirrer blade 4 is of a slender hollow form whose lower part alone is opened 13 throughout its whole length. A mixed fluid consisting of a granular soil statilizer and compressed air, sent through the supply tube 6, is jetted from the hole 12 of the end portion 11 of the supply tube 6 and collided against the ground soil exposed in the opening portion 13 of the stirrer blade 4, whereupon the stabilizer adhered to the ground soil and the compressed air rebounds and goes upwards and then jetted from the hole 12' through the opening 14 and the communication tube 11', whereby the stabilizer staying in the compressed air is adhered to the ground soil. The upper part of the inside space 10' of the stirrer blade 4' is led to the aperture 5 through the opening 15, from which compressed air without containing stabilizer is released to the open air.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stirring device used in a construction method for improving soft ground by sending a powdery ground stabilizer using compressed air and ejecting it into the ground, and stirring and mixing it with the entire ground soil. One object of the present invention is to provide an agitation device for improving soft ground that is capable of completely adhering a soil stabilizer to the ground soil and recovering only compressed air.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

Reference numeral 1 denotes a hollow rotating shaft, which is suspended from the construction machine 2 in a vertically movable manner and extends downward from the nine-rotary drive machine 3, and has a plurality of stirring blades 4, 4' at its lower end.・Protrudes radially.

A stabilizer supply pipe 6 is inserted into the rotating shaft 1 through a gap 5t, and a hose 7 is connected to the stabilizer supply pipe 6 via a swivel mechanism (not shown). 11- to a hose 9 which opens into the atmosphere at its end.

The stirring blade is also an elongated hollow body with only the lower part open over its entire length, and the end portion 11 of the stabilizer supply pipe 6 extends into the interior space 10 of the blade.

The tip of the distal end 11 is closed, and a number of holes 12 are arranged in the lower tube wall of the distal end 11.

A mixed fluid of powdery ground stabilizer and compressed air sent from the hose 7 to the stabilizer supply pipe 6 is ejected from this hole 12 and collides with the ground soil exposed at the opening 13 of the stirring blade 4.

The soil stabilizer then adheres to the ground soil, and the compressed air bounces back upwards.

The stirring blade 4' is a hollow body similar to the stirring blade 4, and has a closed tip and an opening 14 to the internal space of the stirring blade 4 at the base end in its internal space 10'. A communicating pipe 11' is provided at 12'i.・The compressed air directed upward in the internal space 10 of the stirring blade 4 is passed through the communication pipe it'
The compressed air is ejected from 512' through the compressed air, and the soil stabilizer remaining in this compressed air adheres to the ground soil.

The upper part of the internal space 10' of the stirring blade 4' communicates with the gap 5 through an opening 15 provided in the tube wall of the rotating shaft 1, and the internal space 1
The compressed air containing almost no soil stabilizer in the gap 5
It passes through the hose 9 and is released into the atmosphere.

Although this example is a case of two-stage ejection, it is of course possible to further repeat the ejection 9 times, and the manner of ejection is not limited to the illustrated example. do not have.

In short, in the present invention, the important point is that the internal spaces of a plurality of stirring blades are connected through a communication pipe so that the ejection is performed in multiple stages. This soil stabilizer completely adheres to the ground soil, and the recovered compressed air does not contain any soil stabilizer, so not only is there no waste of soil stabilizer, but the recovered compressed air is It has the advantage that there is no need to provide a separation device such as a filter even when the compressed air is released into the atmosphere.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of the entire construction equipment equipped with the device of the present invention, Fig. 2 is a vertical sectional view of an example of the device of the present invention, and Fig. 3 is a
FIG. 3 is an enlarged sectional view taken along line XX in the figure. In the drawing, l: rotating shaft, 4.4': stirring blade, 6: stabilizer supply pipe, 1
0.10': Internal space, 11': Communication pipe, ...
Agent Patent Attorney Hiroshi Sometani Figure 2 12 13 Continued from page 1 0 Inventor Misaka - 44-81 Oaza Wakaguri, Ami-cho, Inashiki-gun, Ibaraki Prefecture 0 Inventor Masanori Matsushita 3-14 Nishikawaguchi, Kawaguchi City 14 Fudo Nishikawaguchi Heights 401

Claims (1)

[Claims] A plurality of stirring blades protrude radially from the lower end of the rotating shaft, and a narrow conduit that guides and spouts a mixed fluid of powdery ground stabilizer and compressed air into the internal space of one stirring blade. , a conduit for guiding the compressed air separated within the internal space of one stirring blade into the internal space of another stirring blade for further ejection, and compressed air separated within the internal space of the final stirring blade. An agitation device for improving soft ground, characterized in that it includes a conduit for introducing air into the atmosphere.