JPS58168714A - Sand pile former - Google Patents

Abstract

PURPOSE:To raise the efficiency of working by a method in which a rotary outer casing is pulled up while compacting or discharging sand in the rotary outer casing by vertically moving the elevating inner casing. CONSTITUTION:A rotary outer casing 5 and an elevating inner casing 8 are penetrated to a given depth into the ground, a drive motor 34 is stopped and sand is charged from a hopper 7 into the space between the rotary outer casing 5 and the elevating inner casing 8. Then, a crane and an air spring 4 are alternately operated to vertically move the elevating inner casing 8 and thereby the sand inside the rotary outer casing 5 is compacted. According to the amount of sand pushed out by the elevating inner casing 8, the drive motor 34 is driven, an excavating blade is turned forwardly, and the rotary outer casing 5 and the elevating inner casing 8 are gradually pulled out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sand pile construction device for constructing sand piles in soft ground in order to improve the soft ground.

Conventionally, there are many sand pile construction devices that create sand piles in soft ground, but one of them is a double pipe structure consisting of an outer casing and an inner casing, and is capable of creating high-quality sand piles. There is a sand pile creation device that can do this.

This sand pile creation device includes a hollow outer casing, an exciter which is disposed above the outer casing so as to be movable up and down via an air spring, and an upper end fixed to the exciter. an inner casing whose lower part is suspended in the outer casing; the air spring is filled with pressurized air to integrally fix the exciter and the outer casing; The outer casing (including the inner casing) is moved into the ground by vertically photographing the exciter. Then, the pressurized air in the air spring is gradually released and the edge between the exciter and the outer casing is cut to prevent the vibration of the exciter from being transmitted to the outer casing. To prevent the ground from being agitated by the vibrations transmitted to the surrounding ground, only the inner casing is moved up and down by the vibration of the exciter to compact the sand in the outer casing, and then the air spring is filled with pressurized air again to remove the outer casing. The outer casing is pulled out by propagating the vibration of the exciter, and the above-mentioned operation is repeated to create the entire sand pile in the ground. However, since the above-mentioned sand pile building apparatus uses a vibrator TL, a shock absorber is required. In addition, in order to cut the edge between the outer casing and the inner casing to prevent vibrations from being transmitted to the ground around the outer casing, we temporarily stopped pulling out the outer casing, and then moved only the inner casing up and down to remove the outer casing. It is necessary to compact the sand, which has the disadvantage of poor work efficiency.

The present invention aims to provide a sand pile construction device that improves the above-mentioned drawbacks. EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the sand pile construction apparatus of the present invention will be described with reference to the accompanying drawings.

In this embodiment, the sand pile construction device of the present invention has a fixed frame 8
1, and an elevating pedestal 2 attached to the fixed pedestal 1 so that it can be raised and lowered.
, a crane (not shown) as means for pulling up the elevating pedestal 2 linked to the elevating pedestal 2, and the elevating pedestal 2 and the fixed pedestal 1.
a long-stroke air spring 4 as a means for pushing down the elevating frame interposed between the rotary drive unit 6, a hollow-shaped air spring 4 whose upper end is rotatably attached to the rotary drive unit, and an excavation blade 51 provided at the lower end. an outer rotating casing 5; an inner lifting casing 8 whose upper end is fixed to the lifting frame 2 and whose portion below the upper end is inserted into the outer rotating casing 5; and a sand inlet supply port provided in the outer rotating casing 5. It is equipped with a hopper 7 and a vibrator 6 attached to the lower end of the elevating inner casing 8.

The fixed frame 1 has an appropriate number of fixed columns 1, for example, four fixed columns 1.
An upper fixed frame 11 and a lower fixed frame 12 are respectively fixed to the upper and lower ends of the upper fixed frame 11, and a sheave group 15 is rotatably mounted on the upper fixed frame 11, and an air spring is installed in the center of the lower surface of the upper fixed frame 11. A lower elevating frame 22, which will be described later, fixes the upper end of the guide column 14 for steady rest of No. 4.
．． Through holes 24 and 421 in the intermediate plate 42 and the lower end plate 41
, 412, and a through hole (not shown) having a diameter slightly larger than the diameter of the inner elevating casing 8 is provided in the lower fixed frame 12. A wire rope let out from a hoist (not shown) is looped around the 7-pipe group 13.

The elevating frame 2 includes an elevating column 20 on the upper fixed frame 11.
An appropriate number of elevating columns, for example four, are installed so that they can be raised and lowered, and a rising mount 21 and a lowering mount 22 are respectively fixed to the upper and lower ends of the elevating support 20, and the sheave 25 is rotatably attached to the rising mount 21. At the same time, a through hole 2 having a diameter slightly larger than the diameter of the guide column 14 is formed in the center of the lowering platform 22.
4 will be established. The wire rope Wsf let out from the crane is hooked onto the sheep 26 and turned.

As shown in FIGS. 2 and 5, the air spring 4 is of a so-called seven-ring type, and has two circular end plates 41 and a circular shape with a diameter slightly larger than the diameter of the end plates 41. Appropriate number of sheets,
For example, it includes six intermediate plates 42, an appropriate number of bellows 45, for example seven bellows 45, and a cushion ring 450, which are made of an elastic member such as rubber and have a six-line bellows shape. An engaging pawl 410 that closely engages the end of the bellows 45 is provided on one surface of the end plate 41 in an annular manner. Engagement claws 4 that tightly engage the ends of the bellows 45 on both sides of the intermediate plate 42
20 is protruded in an annular shape having the same diameter as the engaging claw 410 of the end plate 41, and a through hole 421 for air circulation is provided in the center inside the engaging claw 420 of the intermediate plate 42; 42
Four sets of guide arms 44 are provided at the outer peripheral end of the guide arm 44.
A through hole 440 having a diameter slightly larger than the diameter of the lifting column 20
will be established. The two end plates 41 are placed with the engaging claws 410 inside, facing each other with an appropriate gap, and the six intermediate plates 42 are arranged between the two end plates 41. The seven bellows 43"i are arranged between the end plate 41 and the intermediate plate 42 and the intermediate plate 420, and the bellows 45
Both ends of the bellows 45 are tightly fitted into the engaging claws 410 of the end plate 41 and the engaging claws 420 of the intermediate plate 42, or the engaging claws 420 of the intermediate plate 42 and the engaging claws 420 of the intermediate plate 42, respectively.
A cushion ring 450 is fitted into the trough, and a through hole 412 for air circulation is provided at the center of the lower end plate 41.

The air spring 4 thus formed is interposed between the upper fixed pedestal 11 and the lower elevating pedestal 22, and the upper and lower end plates 41 of the air spring 4 are
It is fixed to the upper fixed pedestal 11 and the lower elevating pedestal 22 respectively, and the through hole 440 of the guide arm 44 of the air spring 4 is connected to the elevating column 2.
0, and a branch pipe (not shown) from an air circulation pipe (not shown) is connected to a through hole 412 for air circulation in the lower end plate 41 of the air spring 4. An air hose, etc. (not shown) from a compressor (not shown) is connected to the air inlet and air outlet provided in this air distribution pipe through all solenoids (lubes, etc. (not shown)). By switching this solenoid valve etc., air from the compressor is injected into or removed from the air spring 4, thereby expanding and contracting the air spring 4, thereby raising and lowering the elevating frame 2 relative to the fixed frame 11. In particular, when the elevating frame 2 is raised and lowered with respect to the fixed frame 11. The telescopic lifting frame 2 is pushed down by the expansion of the air spring 4.

The rotation drive unit 5 includes a reducer (not shown) housed in the lower fixed frame 12, and two drive motors (the number is not particularly limited) 54 mounted on the reducer,
The speed reducer and a drive motor 54 are linked, and the upper end of the rotary tube 50 is rotatably attached to the speed reducer.

The non-rotating casing 5 includes a fixed part 50 having a hopper 7, a short rotating force transmitting pipe 51 provided at the lower end of the fixed part 50, and a rotating body 52 provided at the lower end of the short rotating force transmitting pipe 51. Become. The rotary tube 50 is passed through the fixed part 50 and connected to the rotational force transmitting short tube 51. This rotating tube 50
The rotational force transmission short pipe 51 is configured to fully transmit the rotational force of the rotational drive s5 to the rotating body 52 of the rotating outer casing 5, and to supply the sand put into the hopper 7 to the rotating body 52. Said. ,5. . T□. □１１１１□□□１
196, sand discharge port 53 provided spirally in the left direction (counterclockwise direction) when viewed from 1, and at the lower opening of the rotating body 52.
The opening/closing shoe 54'i closes when the outer rotating casing 5 penetrates to prevent dirt from entering the outer rotating casing 5.
The non-rotating casing 5 is open and open when pulled out and is attached so as to be openable and closable by a hinge mechanism (not shown) so as not to interfere with sand pile construction.

The inner diameter of the elevating inner casing 8 is the same as that of the guide column 14.
It has a cylindrical shape whose outer diameter is slightly larger than the outer diameter of the rotating tube 50 and slightly smaller than the inner diameter of the rotary tube 50. The upper end of the inner elevating casing 8 is fixed to the lower surface of the lower elevating frame 22, the tip of the guide column 14 is inserted into the inner elevating casing 8, and the inner elevating casing 8 is inserted into the rotating tube 30 and the outer rotating casing 5. The vibrator 6 is attached to the tip of the elevating inner casing 8.

As shown in FIGS. 4 and 5, the vibrator 6 includes a head 60 fixed to the lower end of the elevating inner casing 8, and a cylinder 62 whose upper flange is fixed to the flange of the head 60 with bolts 61 or the like. It consists of a piston 65 slidably housed in the cylinder 62, and a hammer 65 fixed to the lower end of the piston 65 with a bolt 64. The cylinder 62 is provided with two air supply passages 621 in the axial direction of the cylinder 62 that communicate with the air supply passage 601 of the head 60, and the cylinder 62 is provided with two air discharge ports 622 that communicate with the air supply passage 601 of the head 60.
A total of eight air holes 660 are provided in the piston 65, two at four locations below the piston 65, and an air passage hole 660 is provided between the outer circumferential side of the piston 65 and the inner circumferential side of the cylinder 62. A first air chamber 66 communicating with the air supply path 621 is provided, and a second air chamber 67 communicating with the air insertion port 650 is provided within the piston 63. The lower end of the air feed vibro 8 passed through the inner casing 5 is connected to the supply port 600 of the head 60, and an air hose (not shown) etc. from a compressor (not shown) is connected to the upper end of the air feed vibro 8. When air is supplied through the air supply vibro 8, the hammer 65 moves up and down. Yes, I, Air Feed Vibro 8
When air is supplied through the supply port 600. It is press-fitted into the second air chamber 67 through the feed passages 601, 621 and the insertion hole 660 to push down the piston 63, and the hammer 65 descends accordingly. The piston 65 descends, the first air chamber 66 and the WJ2 air chamber 67 are closed, and the insertion port 650 is closed.
When the second air chamber 67 and the discharge port 622 communicate with each other through the insertion hole 650 . Ejection slot 62
The air is discharged to the outside through the air supply port 600.2 and is continuously supplied via the air supply vibro 8. It is press-fitted into the first air 66 through the supply paths 601 and 621 to push up the piston 65, and the hammer 65 rises accordingly. Thereafter, the above-described action is repeated to move the hammer 65 up and down independently of the up-and-down movement of the air spring 4 and the up-and-down inner casing 8.

The sand pile building apparatus of the present invention in this embodiment has the above-mentioned configuration, and the sand pile building operation will now be described with reference to FIG. 6.

(a) First, the sand pile construction device of the present invention is suspended from a leader via a wire rope, a hanger, a sheave, etc. (not shown in the drawing), and is positioned at a predetermined position on the soft ground G to be improved. Next, the drive motor 54 is driven to rotate the non-rotating casing 5 in the direction of the arrow (to the left when viewed from above), and the excavating action of the cutting blade 31 of the rotating non-rotating casing 5 causes the non-rotating casing 5 to rise and fall. Penetrate the inner casing 8 etc. into the ground G to the required depth. At this time, since the rotating outer casing 5 and the elevating inner casing 8't--the ground G are penetrated by the rotation of the excavating blade 51, the inner and outer casings are removed more quickly than when the casings are purchased using a vibro (exciter). Penetration is possible, and it is possible to perform penetration without noise and with almost no movement, and there is no need for a shock absorber or the like. Furthermore, since the opening/closing shoe 54 is closed when the inner and outer casings penetrate, there is no risk of dirt entering the outer rotating outer casing 5.

(b) After penetrating the rotating outer casing 5 and the elevating inner casing 8 to the required depth by the operation in (a) above, the drive motor 54 is stopped and the hopper 7 is moved.

Sand is thrown between the rotating outer casing 5 and the elevating inner casing 8.

(Cλ(d)) Then, the crane and the air spring 4 are operated alternately to move the inner elevating casing 8 up and down to compact the sand inside the outer rotating casing 5. That is, the air in the air spring 4 is removed and the inner elevating casing 8 is tamped. 8 by a crane, then stop lifting by the crane, let it out on a wire rope W2, and inject air into the air spring 4 to raise and lower the inner lifting casing 8, so that the ground G around the outer rotating casing 5 is While being protected from being stirred, the elevating inner casing 8 is lowered to the ground via the elevating frame 2, and the elevating inner casing 8 protects the rotating outer casing 5.
While the sand inside is compacted, the sand at the tip of the outer rotating casing 5 is pushed out from the discharge port 53. Roughly speaking, when all the air is supplied to the vibrator 6 through the air feeding vibro 8, the hammer 65 moves up and down independently of the vertical movement of the elevating inner casing 8, and is pushed out and tamped by the elevating inner casing 8. Compact the sand further.

Then, depending on the amount of sand extruded from the lifting inner casing 8,
The drive motor 54 is driven to reversely rotate the excavation blade 51 to gradually pull out the rotating outer casing 5 and the elevating inner casing 8.

At this time, if the stroke length of the vertical movement of the inner elevating casing 8 is large, the amount of sand extruded from the elevating inner casing 8 will be large, and therefore the sand will come out well and the sand pile can be built efficiently and quickly.

Furthermore, in the present invention, when the elevating inner casing 8 is lowered, the air spring 4 operates to forcibly push down the elevating inner casing 8, so that the pressing blade of the elevating inner casing 8 is extremely strong compared to when it is simply due to its own weight. It's large. That is, the elevating inner casing 8 is pushed down with a large force. Therefore, tamping and extrusion of sand is good.

As described above, according to the present invention, there is no need to pull out the non-rotating casing 5 and completely remove it, so that work efficiency can be significantly improved.

Although omitted in the above embodiment, the elevating inner casing 8
If a jet nozzle is provided in the rotary outer casing 5, sand will be removed from the rotating outer casing 5 by injecting air from this jet nozzle.
In combination with the extrusion and tamping of the elevating inner casing 8 and the tamping of the vibrator 6, a stronger sand pile can be quickly constructed.

In addition, since the opening/closing shoe 54 is open when the sand pile is being built, there is no risk of interfering with the sand pile build-up.

Furthermore, since the guide column 14 was passed through the through holes 421 and 412 of the intermediate plate 42 and the lower end plate 41 of the air spring 4,
It is possible to prevent the air spring 4 from swinging laterally when expanding and contracting.

Furthermore, an air spring is used as a means for lifting the elevating frame.

Since a crane was used instead of an air jack, hydraulic jack, hydraulic cylinder, etc., fixed mount 1 and elevating mount 2 were used.
There is no need to provide means for lifting the lifting platform between the two. Correspondingly, the stroke length of the air spring 4 as a means for pressing down the elevating frame, that is, the vertical stroke length of the elevating inner casing 8 becomes longer, and the structure becomes simpler.

(e) Repeat the operations in (d) above to create strong sand piles in the soft ground G.

As is clear from the above embodiments, the sand pile construction device of the present invention is capable of compacting and discharging the sand in the rotating outer casing by raising and lowering the inner casing via the lifting frame using the pulling means and the pushing means. Since the non-rotating casing is pulled up while being lifted, sand removal is good and there is no need to stop pulling up the non-rotating casing, which improves work efficiency. In addition, since a starter is not used, there is no need for a shock absorber, and there are fewer problems with noise and vibration. In general, when the lifting inner casing is lowered, the push-down means is activated to forcibly lower the lifting inner casing, so that the sand comes out faster and better, and therefore the work efficiency is improved.

Note that, as a matter of course, the sand pile construction apparatus of the present invention is not limited to the above-mentioned embodiments.

[Brief explanation of drawings]

1 to 6 show the entire first embodiment of the sand pile construction device according to the present invention, and FIG. 1 is a partial fracture pressure surface view. 1. 2.
Figure 6 is a cross-sectional view and a plan view of the air spring,
The figure is a vertical cross-sectional view of the air hammer, FIG. 5(a). (b) is an explanatory diagram of the operating state of the air hammer, and Fig. 6 (a)
. (b), (c), (d), and (e) are construction explanatory drawings. DESCRIPTION OF SYMBOLS 1... Fixed frame, 2... Lifting frame, 3... Rotation drive unit, 51... Excavation blade, 4... Air spring, 5...
Outside rotating casing, 6...vibrator-17...
Hopper, 8... Casing inside the lift. Patent applicant Naka Kurimoto Masashi Tomikurimoto Agent Patent attorney Tadashi Akimoto Figure 3 In 10 10 64 Figure 5

Claims (1)

[Scope of Claims] 1. A fixed pedestal, an elevating pedestal mounted on the fixed pedestal so as to be able to rise and fall, an elevating pedestal pulling means linked to the elevating pedestal, and an intervening device between the elevating pedestal and the fixed pedestal. a hollow rotating outer casing whose upper end is rotatably attached to the rotary drive part and a digging blade is provided at the lower end; A sand pile building device comprising: an elevating inner casing whose lower portion is inserted into the outer rotating casing; and a sand input supply port provided in the outer rotating casing. 2. The sand pile construction device according to claim 1, wherein the elevating and lowering platform pulling means is a crane. (v) The sand pile construction apparatus according to claim 1, 1), wherein the elevating and lowering frame pressing means is a long stroke air spring. 4. The sand pile construction device according to claim 11, the second tomb or the third claim, wherein the elevating inner casing has a vibrator at the lower end.