JPH0324663Y2 - - Google Patents

Description

[Detailed explanation of the invention] Industrial application field This invention is used in the field of constructing cast-in-place concrete piles to mix a retardant into the excess concrete at the head of the pile and process it without hardening the excess concrete. This article relates to a pile head reinforcement concrete processing machine.

PRIOR ART The quality and strength of the pile cap of a cast-in-place concrete pile deteriorates because the concrete separates and disperses when washed with water, or because slime and the like are mixed in.

Conventionally, therefore, it has been common practice to make a considerable amount of extra concrete and scoop out the excess concrete after the ground has been closed.

Recently, research has been conducted on a method of mixing a retardant into the extra concrete at the pile head to statically and easily remove the extra concrete after excavating the ground without hardening or in a state that is not very hard. is being attempted.

Problems that the invention aims to solve Conventionally, heavy equipment such as a rock drill was required to scoop out the excess concrete part of the pile cap, and the scooping work required a great deal of effort and time. , it was that much more expensive. In addition, there is a problem in that heavy noise, vibration, and dust are generated during the raking operation, which significantly deteriorates the working environment.

To implement a method in which a retardant is mixed into the excess concrete at the pile head and the excess concrete is not hardened, the retardant is added immediately and uniformly to the entire area of the excess concrete after the concrete has been poured to a specified level. must be mixed in the same way. It must also be mixed in without being deterred by the presence of cage reinforcing bars for piles, so if a rotating blade is used, high-speed rotation of about 100 to 150 ypm is required, for example. Furthermore, the pile heads of cast-in-place concrete piles are usually at a depth of several meters to more than 10 meters underground, so for example, a long stirring rod driven by an above-ground rotary machine is inserted to give the stirring blades the aforementioned high-speed rotation. If you try to do so, the stirring rod will shake violently, causing the blades to hit the reinforcing steel bars, making it unusable. For the above reasons, at present, mixing of retardants,
A serious problem is that no effective means or equipment for processing excess concrete, known as stirring, has been found.

Therefore, the purpose of this invention is to create a top-driven pile that can quickly, reliably, easily, and inexpensively process excess concrete by mixing retardant and stirring, which can utilize many of the existing machines and equipment. The purpose of the present invention is to provide a head overfill concrete processing machine.

Means for Solving the Problems As a means for solving the above problems, the pile head reinforcement concrete processing machine for cast-in-place piles according to this invention is as shown in the drawings, and as shown in the construction guide 2. A stirring rod 3 of a required length, whose upper end is connected to a rotary drive device 1 that can be raised and lowered along the rod, and is suspended and supported; and a stirring blade 4 provided at the lower end of the stirring rod 3.
and a retardant injection nozzle 5; a rod holder 6 through which the stirring rod 3 is rotatably passed; and means 7 for raising and lowering the rotary drive device 1.

The rod holder 6 is supported so as to be movable up and down by a slider 8 that moves up and down along a setting guide 2 provided at the upper end of the rod holder 6, and a fixed guide (steady rest) 9 provided near the bottom end of the setting guide 2.

Further, a pulley 10 is attached to the upper end of the rod holder 6, and this pulley 10 is suspended by a wire 11 that is fixed at one end to the erection guide 2 and at the other end to the rotary drive device 1 or a part that moves up and down integrally with it. , so that the rod hold 6 is held suspended.

In addition, the rod holder 6 is located at a position approximately half of the stirring rod 6 which is at the upper limit position.
It was provided with a length approximately equal to the lower half of the stirring rod 6.

Operation When the rotary drive device 1 is raised and lowered by the winch 7 serving as a lifting means, the stirring rod 3 moves up and down along the piling guide 2 while being suspended by the rotary drive device 1 and handled by the rod holder 6. Therefore,
If the construction guide 2 is configured as a leader of a roller-type earth auger, for example, the concrete processing machine will have high maneuverability.

Moreover, as the stirring rod 3 moves up and down as described above, the rod holder 6 suspended from the wire 11 via the pulley 10 moves up and down by 1/2 stroke of the stirring rod 3.

Therefore, when the stirring rod 3 is at the upper limit position, if the rod holder 6 is positioned approximately in the lower half of the stirring rod 3 and is about 1/2 the length of the stirring rod 3, the stirring blade can be When stirring rod 3 is lowered until rod 4 reaches the excess concrete,
Concomitantly, the rod holder 6 also descends by 1/2 stroke.

Therefore, the stirring rod 3 is always rotatably supported by the rod holder 6 at the lower part near the stirring blade 4, and the stirring rod 3 is hardly shaken. Required for mixing retardant in concrete. Even if the stirring blade 4 rotates at a high speed of about 100 to 500 rpm, as long as the stirring blade 4 is positioned approximately in the middle hole of the cast-in-place pile 13, there is no problem that the stirring blade 4 will hit or become entangled with the cage-shaped pile reinforcing bar 24. does not occur.

Embodiment Next, a preferred embodiment of this invention shown in FIG. 1 will be described.

1 in the figure is a rotary drive device such as an auger machine, which uses a hydraulic motor etc. as a power source,
It rotates at a high speed of ~150 rpm. This rotary drive device 1 has a construction guide 2 which is a leader of an earth auger vertically supported by a crawler 12, and is attached to the construction guide 2 via a slider 1a so as to be freely raised and lowered. The height of the construction guide 2 is approximately 10 m because the position of the pile head concrete 14 of the cast-in-place concrete pile 13 is usually at a depth equivalent to one basement floor (approximately 8 m).

However, as the installation guide 2, any suitable material other than the earth auger leader may be used.

In the figure, reference numeral 3 denotes a stirring rod whose upper end is connected to the rotating shaft of the rotary drive device 1 and suspended. A stirring blade 4 and a retarder injection nozzle 5 are provided at the lower end of the stirring rod 3. The stirring rod 3 has a length of approximately 9 m so that it can sufficiently reach the depth of the pile head reinforcement concrete 14 mentioned above.

The retarder injection nozzle 5 is connected to the hollow stirring rod 3 and the swivel joint 15 of the rotary drive device 1.
An injection pump unit (not shown) connected to the swivel hose 16 through and mounted on the crawler 12
is connected to. However, the retarder injection nozzle 5 may be inserted from the ground as an injection pipe separate from the stirring rod 3 and stirring blade 4.

In the figure, reference numeral 6 denotes a rod holder through which the stirring rod 3 is supported by allowing it to rotate and move up and down. This rod holder 6 has a slider 8 at its upper end that moves up and down along the setting guide 2. Also,
The lower part of the rod holder 6 is supported by a fixed guide 9 provided at the lower end of the erection guide 2 through a sleeve 9a so as to be able to move up and down. This rod holder 6 is positioned at approximately the lower half of the stirring rod 3 when the stirring rod 3 is at the upper limit position as shown in Fig. 1, and is approximately 1/2 as long as the stirring rod 3. It is set up as.

Reference numeral 7 in the figure indicates a winch as a lifting means installed on the back side of the erection guide 2. the wire 1
7 is connected to the rotary drive device 1 at point a via a guide sheave 18 provided at the top end of the construction guide 2;
This allows the rotary drive device 1 and, by extension, the stirring rod 3 to be moved up and down.

However, the elevating means is not limited to the winch 7 and wire 17 described above. For example, means such as a pinion rack mechanism or hydraulic cylinder drive may also be employed.

A pulley 10 is provided at the upper end of the rod holder 6. The pulley 10 and, by extension, the rod holder 6 are suspended by a wire 11 whose one end is fixed to a point c on the top of the construction guide 2 and the other end is fixed to a point b of the rotary drive device 1.

Therefore, when the winch 7 is operated and the stirring blade 4 is lowered until it reaches the extra concrete 14 in the pile hole 20, the pulley 1 is moved by the wire 11.
The rod holder 6 suspended through the rod holder 6 is also lowered by 1/2 stroke of the stirring rod 3, so that the lower portion of the stirring rod 3 that has entered the pile hole 20 is necessarily supported by the rod holder 6.

Therefore, even if the stirring blade 4 is rotated at a high speed of 100 to 150 rpm, the stirring rod 3 is supported by the rod holder 6 to the deep part of the pile hole 20.
Performs stable rotational motion with almost no vibration.

Therefore, for example, if the diameter of the pile is φ800 and the diameter of the stirring blade 4'a is approximately φ600, and the stirring rod 3 is positioned at the center of the pile hole 20, the stirring blade 4a Troubles such as collisions with the cage-shaped pile reinforcing bars 21 can be prevented, and the additional concrete 14 can be treated accurately by injecting the retarder and stirring.

Effects of the invention As described above in detail along with the examples, the pile head excess concrete processing machine of this invention has the following features:
A long stirring rod 1 is suspended and supported by a rotary drive device 1 on the ground, and a retardant is quickly and reliably mixed into the concrete pile 14 regardless of the underground depth position of the pile head concrete 14. Can be processed.

Moreover, the stirring rod 3 is moved by the upper rotary drive device 1.
Since it has a simple configuration and is driven by
For example, it can be implemented relatively easily and inexpensively by modifying an existing earth auger or the like.

Of course, since the stirring blade 4 can be given a necessary and sufficient high speed rotation, the entire area of the pile head concrete 14 can be sufficiently stirred and the retardant can be mixed homogeneously and the retardant can be sufficiently effective. can be demonstrated.

Therefore, the extra concrete 14 is not hardened,
Or, it can be easily removed after excavating the ground in a state that is not very hard, and is much easier and cheaper than plowing.
What's more, it can be done in a short time and without degrading the work environment.

[Brief explanation of the drawing]

FIG. 1 is an elevational view showing the entire pile head reinforcement concrete processing machine according to this invention.

Claims (1)

[Claims for Utility Model Registration] [1] A stirring rod 3 of a required length, the upper end of which is connected and supported by a rotary drive device 1 that can be raised and lowered along a construction guide 2; and a lower end of the stirring rod 3. The rod holder 6 includes a stirring blade 4 and a retarder injection nozzle 5 provided at the top of the rod, a rod holder 6 through which the stirring rod 3 is rotatably passed, and means 7 for raising and lowering the rotary drive device 1. The rod holder 6 has an upper end portion thereof. The rod holder 6 is supported by a slider 8 that moves up and down along a building guide 2 and a fixed guide 9 that is provided near the lower end of the building guide 2. A pulley 10 is attached to the rod holder 6.
A cast-in-place pile characterized in that the pulley 10 is suspended by a wire 11 that is fixed at one end to a construction guide 2 and at the other end to a rotary drive device 1 or a part that is raised and lowered integrally with it. Pile head overfill concrete processing machine. [2] The rod holder 6 described in Claim 1 of the Utility Model Registration is located at approximately the lower half position when the stirring rod 3 is at the upper limit position, and has a length approximately equal to the lower half of the stirring rod 3. A pile head extra-filling concrete processing machine, characterized in that it is provided as a.