JPS6319331A - Tremie tube separator - Google Patents

Abstract

PURPOSE:To raise the efficiency and safety of operations with lesser manual operation by placing concrete stably by providing a hopper setter, a liftup device with paired holding units, and a tremie tube disassembler. CONSTITUTION:In pulling up and separating a tremie tube 12 screwed with many hollow cylinders 10, a hopper 14 is turned upwards by a hopper setter and removed from an upper stage cylinder 10. Holding by a holding unit 26 is released, and the tremie tube 12 is held by a movable holding unit 36 and raised only by a given stroke by a liftup device 16. The turning arm 40b of the tremie tube separator 40 is turned about 180 deg., a hand 40i is inserted into the cylinder 10 to hold the cylinder 10, and the cylinder 10 is turned to release the couplement with the lower stage cylinder 10. The holding of the holding unit 36 is released, and the arm 40b is rotationally moved to a housing case 42 house the cylinder 10.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a device for handling tremie pipes for concrete placement, and in particular to a device for handling tremie pipes for concrete placement, and in particular, a method for screwing and connecting a large number of tremie pipes to place concrete at great depths underground. The present invention relates to a tremie interpipe device suitable for installation.

(Prior Art and Problems) Conventionally, for example, when constructing a continuous wall made of concrete underground, concrete is placed by inserting a hollow cylindrical tremie pipe into a cut vertical groove. A tremie tube is a hollow cylindrical body, usually several meters long, which is screwed together at both ends and connected in a multi-tiered manner to create a desired shape.

On the other hand, when pouring concrete into a vertical groove, the tip of the tremie pipe should be maintained so that it does not separate from the poured concrete surface, and the tremie pipe should be pulled up as the concrete surface rises. The upper part of the tremini pipe that protrudes above the ground must be separated and dismantled in order.

Otherwise, the upper end of the tremie pipe will protrude high above the ground, making it difficult to pour concrete into the tremie pipe.

In this case, the following problems occur particularly when concrete is placed deep underground, for example, 100 meters underground.

That is, in conventional construction, concrete is poured while the tremie pipe is gradually lifted by a large crane, and the separation and dismantling of the tremie pipe is performed manually.

As a result, the tip of the tremie pipe separates from the surface of the poured concrete, causing the poured concrete and leat to separate, creating a weak point in the structure, or because the work is done manually, it is time consuming and inefficient, resulting in rough, hollow, The work was dangerous due to the heavy weight of the cylinder, and there were also safety issues.

In addition, concrete pouring into the tremie pipe is usually carried out by attaching a funnel-shaped hopper to the top end of the tremie pipe, which must be removed and reinstalled when the tremie pipe is to be separated or dismantled. Since the attachment/detachment work was done manually, it was also inefficient in this respect.

This invention was made in view of the above-mentioned problems, and its purpose is to enable concrete to be placed in a stable manner, and to greatly eliminate the need for manual separation and dismantling. It is an object of the present invention to provide a tremie interpipe device that increases work efficiency and safety.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an apparatus for pulling out and disassembling a tremie tube formed of a large number of hollow cylinders screwed together in multiple stages. A hopper refilling device that holds a hopper for concrete pouring at its upper end and attaches and detaches it; and a pair of clamping units spaced apart in the vertical direction that clamps and releases the upper end of the solid and sequentially pulls it out. a lift-up device having a Nl1i2. one of the clamping units of the lift-up device is provided with a retractable rotary hand that enters the upper solid body while clamping the next cylinder body of the tremie tube and rotates it to release the screwing. It is characterized by comprising a horizontally rotatable tremie tube disassembly device.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show an embodiment of the tremie interpipe device according to the present invention.

The tremie tube device shown in the same figure has a male thread around one end of a hollow cylindrical body 10, an enlarged head 11 at the other end, and a female thread carved on the inner surface, which are sequentially screwed and connected to form a multistage A funnel-shaped hopper 14 is fitted to the upper end of the tremie pipe 12, and after pouring concrete through the hopper 14, it is pulled upward by the rift 1 to the lifting device 16. The tremie tube 12 protruding above the ground is sequentially disassembled and stored starting from the upper end.

In the initial state, the tremie pipe 12 is inserted into a vertical groove 20 excavated underground while being filled with muddy water 18, and is moved by a lift-up device]6 so that its tip is vertically (vertical) (slightly spaced from the bottom surface of η20). Retained.

The lift-up device 16 is fixed and movable 26.3.
A tremie tube 12 is disposed in the center on a trench 22 installed at opposite positions of the vertical groove 20, and a base 24 is installed to surround the trench 22. installed.

The base 24 has a rectangular shape that is slightly shorter than the length between the trenches 22, and a fixed clamping unit 26 is installed on the opposing inner surface of the trench 24 side, and the unit 26 is connected to a pair of clamping hardware 26a provided facing each other. , 25a and this money vlJ
It is composed of cylinders 26b, 26b that bring the cylinders 26a, 26a closer to or apart from each other in the horizontal direction, and a semicircular recess is cut out at the tip of the hardware 268.26a to drive the cylinders 26b, 26b. Then, the metal fittings 26a, 26a come close to clamp the portion of the tremie tube 12 that protrudes above the ground, and the clamping is released by retraction of the cylinders 26b, 26b.

Furthermore, on one piece of the base 24 that crosses the vertical groove 20, a pair of guide columns 28, 28 are erected at a predetermined interval,
A gate-shaped frame 34 is installed, which is guided by a plurality of guide rollers 30.3t) and moves up and down by the expansion and contraction of the jack 32.

An extension part 34a toward the other side of the base 24 is integrally formed at the lower end of the gate-shaped frame 34, and a movable clamping unit 36
is provided.

The movable clamping unit 36 has substantially the same configuration as the fixed clamping unit 26, and includes a pair of clamping hardware 36a, 36.
a and a pair of cylinders 36b, 36b, arranged coaxially with the fixed clamping unit 26, and the above-mentioned jack 32
At the bottom dead center, the tremie tube 12 is clamped and released above the fixed clamping unit 26.

Furthermore, a hopper refilling device 38 is installed on the extension portion 34a of the gate-shaped frame 34.

The hopper refilling device 38 includes a plate 38a that moves up and down together with the frame 32 and is erected on the extension 32a, and a hopper moving cylinder 38c that is swingably attached to the side of the plate 38a with a bin 38b. The tip of the telescopic plunger 38d of the cylinder 38c and the stay 38c protruding from the edge of the hopper 14 are connected to the bin 38.
f, and the bottle 38f is loosely fitted into an arcuately curved slit 38g formed above the plate 38a.

With this configuration, when the plunger 38CI of the moving cylinder 38c is extended, the cylinder 380 rotates to the dotted line position in FIG. While rotating upward as shown by the line and separating from the tremie tube 12,
Retracting the plunger 38d performs the opposite operation, allowing the hopper 14 to fit into the upper end of the tremie tube 12.

On the other hand, a tremie tube disassembly device 40 is installed on one side of the base 24 on which the fixed clamping unit 26 is attached.

The disassembly device 40 has a column 4Qa erected on a base 24 and a rectangular rotating arm 40b fitted at the upper end of the column 40a, and the rotating arm 40b is horizontally driven by a hydraulic motor 40d connected by a gear 40C. rotate.

A cylinder guide 40e is fixed to the tip of the rotating arm 401), and inside the guide 40e are a telescopic tremie tube lifting cylinder 4Of and a cylinder 4O.
A cylindrical body 40g supported by a telescopic plunger f is installed inside, a hand 401 whose diameter is expanded and contracted by a catch cylinder 40h is attached to the tip of the cylindrical body 40g, and the hand 40i is connected to a hydraulic motor 40 connected by a gear 40j.
It is designed to be rotated by k.

Further, the rotating arm 40 of the tremie tube disassembly device 40
A storage case 42 is installed at a position b rotated approximately 180 degrees from the upper position of the tremie tube 12 to receive the disassembled cylinder 10 and store it vertically.

The storage case 42 has a main body 42 that combines frames into a frame shape.
a, and a pair of guides 42b defining a meandering passage on the upper surface, and the cylindrical body 10 is stored with its enlarged head protruding above the guides 42b, and the outer surface of the cylindrical body 10 and the guide 42b are A roller may be interposed between them, and a slope may be provided on the guide to rotate the roller so that the received cylinders 10 are automatically sent rearward one after another.

Further, while the cylinder body 10 is moving along the guide 42b, a cleaning device 4 having a nozzle that injects high-pressure jet water is provided.
2c may be provided to wash off the dirt adhering to the cylindrical body 10.

Next, the operation of the handling device having the above structure will be explained.

First, in the initial state, that is, during concrete pouring, the fixed and movable clamping units 26 and 36 of the lift-up device 16 clamp the upper end of the uppermost cylindrical body 10 of the tremie pipe 12, and the hopper 14 tremie tube 1
2, and the hand 401 of the disassembly device 40 is set on the storage case 42 side. In this case, concrete can be directly supplied to the hopper 14 by a concrete mixer truck without any problem, since the opposite side where the decomposition device fff40 is provided is located.

When a predetermined amount of concrete has been poured, first, the cylinder 26b of the fixed clamping unit 26 is driven to release the clamping, the jack 32 of the lift-up device 16 is started, and the movable clamping unit 36 moves the tremie pipe 12. While holding the cylinder, a predetermined stroke, for example, a stroke corresponding to the length of the cylindrical body 10, is set.

Then, while the fixed clamping unit 26 clamps the lower cylindrical body, the cylinder 38c of the hopper refilling device 38 is driven to rotate the hopper 14 upward and separate it from the upper cylindrical body 10.

After that, the rotating arm 40b of the disassembly device 40 is rotated about 180
The hand 401 is moved horizontally to enter the upper cylindrical body 10, the diameter is expanded by the catch cylinder 40h to hold the cylindrical body 10, the grip of the movable clamping unit 36 is released, and the hydraulic motor 4'Ok is used to The upper cylindrical body 1o is rotated via the hand 40i to release the threaded connection with the lower cylindrical body 10.

Next, after being raised by the lifting cylinder 4Of, the rotating arm 40b is rotated 180 degrees, and the upper cylinder 1
0 is placed on the storage case 42, the holding by the hand 401 is released, and the upper cylinder body 10 is received in the storage case.

Here, when the hand 40i holds the upper cylindrical body 10 during the above-mentioned operation, the movable clamping unit 36 descends due to the retraction of the jack 32, clamps the lower cylindrical body 10 again, and holds the hopper 10.
4 is set on the solid body 10 by the refilling device, concrete placement is restarted, and the above-described operation is repeated thereafter.

Now, in the tremie interpipe apparatus having the above-mentioned configuration, during concrete pouring, a pair of clamping units 26.
The tremie tube 12 is firmly held between the grooves 36 and the tremie tube 12 is pulled out and separated by the vertical groove 2.
If the setting is made such that concrete corresponding to the length of the cylindrical body 10 is placed inside the tremie tube 10, construction can be performed without the tip of the tremie pipe 12 separating from the surface of the concrete to be placed. Also,
Pulling out and separating the tremie tube 12 and attaching and detaching the hopper 14 can be done by remote control, which improves safety and work efficiency, and can be done almost automatically by installing simple sensors at appropriate locations, eliminating manual work. It can significantly reduce the
Particularly, when concrete is poured to a great depth by screwing together a large number of cylindrical bodies, even greater effects can be obtained.

Furthermore, since the disassembled cylinders are neatly stored in the storage case 42, the working environment is not only improved, but they can also be moved together with the case in the stored state, and the cleaning device 42a
If installed, it is also possible to wash away the soil and sand that has adhered to it.

Furthermore, all the devices of the above-mentioned embodiments are installed on the ground, occupy a relatively small area, and have two vertical grooves.
It can operate without any problem even if the reinforcing bar part is installed near the upper end in the interior.

In the above-mentioned inter-tremie tube device, it is also possible to insert the tremie tube 12 of desired quality into the vertical groove 20 by sequentially connecting the cylinders 10 by performing the above-described operation in reverse.

Although it is desirable to install the storage case 40, depending on the work conditions, it may not be necessary to install the storage case 40, and the separated and dismantled cylindrical body 1
0 may be stacked on the ground.

(Effects of the Invention) As described above in detail with reference to the embodiments, the tremie pipe-to-pipe device according to the present invention enables stable concrete placement and significantly reduces manual work. However, it has various excellent effects such as improved work efficiency and safety.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the tremie interpipe device according to the present invention, in which FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a side view. 1o... Cylinder body 12... Tremy tube 14... Hopper 16... Lift up device 18... Mud Water 2 o...
...I? Groove 22...Trench 24
...... R stand 26 ... Fixed clamping unit 28 ... Guide column 30 ... Guide roller 32 ... Jacket 34 ...
... Gate-shaped frame 36 ... Movable clamping unit 38 ... Hopper refilling device 40 ... Tremy tube disassembly device 42 ... Storage case Patent applicant Tokyo Electric Power Company, Inc.
Igarashi Industries Co., Ltd.
Osamu Obayashi Co., Ltd.
Patent Attorney - Kensuke Shiro 232 illustration

Claims (3)

[Claims] (1) In a device that pulls out and disassembles a tremie pipe formed of a number of hollow cylinders screwed together in multiple stages, the hopper is replaced by holding a hopper for concrete pouring at the upper end of the tremie pipe and attaching/detaching it. a lift-up device having a pair of clamping units spaced apart in the vertical direction for clamping and releasing the vicinity of the upper end of the cylindrical body and sequentially pulling it out;
a telescopic rotary hand that detaches the hopper, and one of the clamping units of the lift-up device enters the upper cylinder body while holding the next cylinder body of the tremie tube, rotates it, and releases the screwing; A tremie tube disassembly device comprising a horizontally rotatable tremie tube disassembly device. (2) The tremie pipe handling device according to claim 1, wherein the hopper refilling device rotates vertically to attach and detach the hopper. (3) The clamping unit clamps and releases the above-ground projecting portion of the cylindrical body, and is configured such that one lower side is fixed and the other upper side is movable up and down. The tremie tube handling device according to any one of Item 1, Item 2, and Item 3.