JPH0259919B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a formwork apparatus for pouring concrete into a tunnel, and more particularly to a non-hinge telescopic type concrete formwork apparatus.

Conventional telescopic concrete formwork equipment has a short length, for example, 1.5 to 3 m in length,
A form formed in the cross-sectional shape of a tunnel is divided into several pieces in the axial direction, and the divided forms are configured to be openable and closable using a hinge mechanism, and this form is made into a unit form, and this unit form is used as a tunnel. A plurality of units are removably connected in the axial direction of the tunnel, a bogie is runnable through the tunnel, and the bogie is equipped with a form support means. Next, the operation will be explained. First, the form on the near side where the concrete has hardened is supported by the form support means of the truck, and the form is closed and demolded so that it can pass through the other forms in the set state. Next, the above-mentioned demolded foam is conveyed by a cart through other foams in a set state to the tip of the foam group where concrete has not yet been poured. Therefore, the demolded form is opened, restored, and connected to the aforementioned foam group. Thereafter, the above-described operations are repeated to sequentially convey and connect the foams on the near side to the tips of the foam group. There are two methods of pouring concrete: one method is to continuously pour concrete in parallel with the movement of the above-mentioned forms, and the other is to place concrete intermittently, alternating with the movement of the above-mentioned groups of forms.

However, the above-mentioned conventional concrete formwork apparatus has the following drawbacks because the form is divided into several pieces in the axial direction and is configured to be openable and closable using a hinge mechanism. That is, since a hinge mechanism is used, it is necessary to manufacture and process the hinge mechanism with high precision so that there is no wobbling, and the manufacturing process of this hinge mechanism is extremely difficult and troublesome. Also,
No matter how precisely the hinge mechanism is fabricated, there will be some errors or discrepancies in the finishing accuracy.
There is a problem with the hinge mechanism.

The present invention aims to provide a non-hinged telescopic concrete formwork device which overcomes the above-mentioned drawbacks.

The present invention is characterized in that side forms are detachably attached to both sides of a top form, and a hinge mechanism is not used.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the non-hinge telescopic tunnel concrete formwork apparatus of the present invention will be described below with reference to the accompanying drawings.

In this embodiment, the non-hinge telescopic concrete formwork apparatus of the present invention has a short length, for example, 3 m, and a form formed in the cross-sectional shape of a tunnel, that is, a portal shape, as the top form 1. Divide into 3 parts with side form 2. The above-described top form 1 constitutes the central part of the top of the gate-shaped form, and the side forms 2 constitute part of the top, corners, and sides of the gate-shaped form. The abutting surfaces 10 and 20 between the top form 1 and the side forms 2 are inclined outward from the outer periphery of the tunnel toward the center so that the top form 1 has a wedge-shaped shape that widens from the top side to the bottom side. Forms an inclined surface. As a result, the top form 1 in the set state can be pulled out from the side form 2,
Work such as inserting the demolded top form 1 between the side forms 2 is smoothly performed.
The top form 1 and the side forms 2 are removably assembled on the inclined surfaces 10 and 20 using bolts, nuts, etc. (not shown), and the top form 1 and the side forms 2 are made into one unit form. This single unit form is removably connected in the axial direction of the tunnel with bolts, nuts, etc. (not shown) in a tunnel in which concrete 3 has been previously cast at the bottom. A short base 4 and a receiving member 5 having the same length as the one-unit forms 1 and 2 are interposed between the lower end of the side form 2 connecting these 11 units and the bottom concrete 3. The base 4 is installed on the bottom concrete 3 so as to face an adjustment bolt 50 of a receiving member 5, which will be described later. The receiving member 5 is provided with an adjustment bolt 50 in the vertical direction (up and down direction) at its lower part, and the abutting surfaces 21 and 51 between the receiving member 5 and the side form 2 are
forms an inclined surface that slopes inward from the outer periphery of the tunnel. As a result, the work of removing the side form 2 in the set state from the receiving member 5 and assembling the side form 2 in the demolded state to the receiving member 5 can be easily performed. A rail 60 is laid on the bottom concrete 3 in the axial direction of the tunnel, and driving wheels 66 and driven wheels 65 of a bogie 6, which will be described later, are engaged with the rail 60 so as to be able to run. This truck 6 has two jacks 62 mounted on the upper surface of both front and rear ends of a lower chassis 61, an upper chassis 63 mounted on the four jacks 62, and support girders on the upper surface of both front and rear ends of the upper chassis 63. 64 is fixed. A driven wheel 65 and a driving wheel 66 are provided on the lower surface of both front and rear ends of the lower chassis 61, and a geared motor 67 is mounted on the upper surface of the rear end of the lower chassis 61, and the geared motor 67 and the driving wheel 66 are connected by a drive transmission means 68. By linking and operating the geared motor 67, the trolley 6 can be made to travel within the tunnel. The length of this truck 6 is slightly longer than the lengths of the unitary forms 1 and 2. Note that 69 in the figure is a take-up reel for the cap tire cord mounted on the truck 6.
The truck 6 is equipped with a top form support means 7 and a side form support means 8. The top form support means 7 fixes two hydraulic jacks 70 on the support girder 64 of the truck 6 so that the expansion and contraction direction of the hydraulic jacks 70 coincides with the vertical direction (vertical direction). A support piece 71 is fixed to the tip of a piston rod of a hydraulic jack 70. The side form support means 8 includes a first support member on the upper surface of both front and rear ends of the upper chassis 63 of the truck 6.
A support roller 81 is rotatably provided, and second support rollers 82 are rotatably provided before and after the support girder 64 of the truck 6, and each of the four first support rollers 8
Four slide arms 80 are engaged with the first and second support rollers 82 so as to be slidable in diagonal left and right directions, respectively. Both ends of four hydraulic jacks 83 are pivotally supported between the tips of the four slide arms 80 and the left and right sides of the support beams 64 of the truck 6, respectively. The upper ends of four dogleg-shaped support arms 84 are respectively fixed to the lower ends of the four slide arms 80, and one ends of four turnbuckles 85 are each pivoted to the lower ends of the four support arms 84. . In addition, 9 in the figure is a water stop plate.

The non-hinge telescopic concrete formwork apparatus of the present invention in this embodiment has the above-mentioned configuration, and its operation will be explained below.

First, the cart 6 is moved to the front forms 1 and 2 where the concrete has hardened. After the carriage 6 has been moved, the hydraulic jack 70 of the top form support means 7 is extended, and the support piece 71 and the top form 1 are connected with a pin. On the other hand, the hydraulic jack 83 of the side form support means 8 is extended, and the tip of the slide arm 80 and the upper part of the side form 2 are connected by a pin, and the other end of the turnbuckle 85 of the side form support means 8 is connected to the lower part of the side form 2. and are connected by a pin. Next, remove and connect bolts, nuts, etc. between the top form 1 and the side form 2, between the side form 2 and the receiving member 5, and between the unit forms 1 and 2 and other form groups. , release the assembly. At the same time, the adjustment bolt 50 of the receiving member 5
is rotated to lower the receiving member 5 and facilitate the disassembly of the side form 2. Then, the hydraulic jack 70 of the top form support means 7 is retracted to remove the set top form 1 from the side form 2, and then the hydraulic jack 83 of the side form support means 8 is retracted to remove the set side form 2. from the receiving member 5. Then, the demolded top form 1 and side form 2 are attached to the other top form 1 in the set state, as shown in FIG.
Then, it is disassembled to be one size smaller than the side form 2, and can pass through the other top form 1 and side form 2. Here, trolley 6
The top form 1 and side form 2, which were demolded by moving the
Then, it passes through the side form 2 and is conveyed to the tip of the form group where concrete has not yet been poured. At the same time, the receiving member 5 and the base 4 are conveyed by input or by the trolley 6 to the tip of the group of unconcrete forms in the same way as the forms 1 and 2 described above. Then, the base 4 is set on the existing bottom concrete 3, and the receiving member 5 is set on the base 4. Next, the hydraulic jack 83 of the side form support means 8 is extended to set the side form 2 on the receiving member 5, and the adjusting bolt 50 is adjusted here to raise the receiving member 5. Assemble the form 2 with bolts, nuts, etc. Then, extend the hydraulic jack 70 of the top form support means 7, insert the top form 1 between the set side forms 2, and assemble the top form 1 and side forms 2 with bolts, nuts, etc. wear. Forms 1 and 2 assembled in this way and other form groups are similarly connected by bolts, nuts, etc. Then, the hydraulic jacks 70 of the top form 1 and the top form support means 7
, remove the pins between the side form 2 and the hydraulic jacks 83 and turnbuckles 85 of the side form support means 8, and remove the hydraulic jacks 70, 8.
Reduce 3.

Thereafter, the above-described operations are repeated to sequentially convey and connect the foams on the near side to the tips of the foam group.

As described above, the non-hinged telescopic concrete formwork apparatus of the present invention is configured such that the top form 1 and the side forms 2 can be separated from each other without using a hinge mechanism, and therefore it is different from the conventional one. It is easier to manufacture and process than a hinge-telescopic concrete formwork device, and has the advantage that there is no risk of looseness due to the hinge mechanism. Further, in this embodiment, a jack 62 is interposed between the lower chassis 61 and the upper chassis 63 of the truck 6, a hydraulic jack 70 is used for the top form support means 7, and the same is used for the side form support means 8. A hydraulic jack 83 and a turnback 85 are used, and finally a bolt 50 for raising and lowering the receiving member 5 is provided, so that the top form 1
Also, the vertical and horizontal positions of the side form 2 can be finely adjusted.

Here, we will explain the fifth method of concrete pouring.
This will be explained with reference to the figure. First, concrete 3 is placed in advance at the bottom of the tunnel. Next, the 11 units of forms 1 and 2 of the non-hinge telescopic concrete form apparatus of the present invention are connected. Here, there are two methods for pouring concrete into the top and sides of the tunnel. First, the form 11 on the near side is used as an overlap, and the other forms 1 to 10 are used to pour concrete. Once the concrete has hardened,
The foam 11 is conveyed through the other foams 1 to 10 to the tips of the foam groups 1 to 10, and here the foam 11 and the foam 1 are connected. A method of transporting and connecting Form 1 and using Form 1 as an overlap. In this case, concrete placement is intermittent. Another method is to sequentially transport and connect the solidified concrete forms while pouring concrete. In this case, the concrete placement is continuous. The non-hinge telescopic concrete formwork apparatus of the present invention can be used in any method.

As is clear from the above embodiments, the non-hinge telescopic concrete formwork apparatus of the present invention does not use a hinge mechanism for attaching and detaching the top form and side form. It is easier to manufacture and process than a formwork device, and there is no risk of looseness due to the hinge mechanism. Further, since the top portion of the present invention is wedge-shaped, demolding is very easy.

It goes without saying that the non-hinge telescopic concrete formwork apparatus of the present invention is not limited to the above-described embodiments.

For example, although the tunnel cross section in this embodiment is rectangular, it may also be a horseshoe or circular tunnel cross section.

Also, in this example, the bottom concrete (invert concrete) 3 is poured first, but
You can hit it later.

Furthermore, instead of the base 4 and the receiving member 5,
A wooden base or the like may be used, or the side form 2 may be removed from the wooden base.

[Brief explanation of the drawing]

The attached drawings show one embodiment of the non-hinged telescopic concrete formwork apparatus of the present invention, and show the first embodiment of the present invention.
The figure is a front view of the set state, Fig. 2 is a front view of the demolded state, and Fig. 3 is a sectional view taken along the line - in Fig. 1.
FIGS. 4a and 4b are a partial front view of the side form and the receiving member in a set state and a partial front view of the disassembled state, and FIG. 5 is an explanatory view showing a concrete pouring method. 1...Top form, 2...Side form, 3...
Bottom concrete, 4...Base, 5...Receiving member, 5
0...Adjustment bolt, 6...Dolly, 7...Top form support means, 8...Side form support means.

Claims (1)

[Claims] 1. A form with a short length and a cross-sectional shape of a tunnel is divided into three into a top form and a side form, and the top form has a wedge shape at the abutting surface of the top form and side form. The inclined surface of the side form is removably attached to the inclined surface of the top form, and the top form and the side form are made into one unit form, and this one unit form is oriented in the axial direction of the tunnel. Multiple units can be connected detachably,
A bogie is runnably passed through the tunnel, the bogie is equipped with a top form support means and a side form support means, and the top form is supported on the top form support means so as to be movable up and down in the vertical direction; The side form is supported by the side form support means so as to be movable back and forth in an oblique direction, the top form and the side form are disassembled, and the top form is lowered while the side form is lowered diagonally downward. 1. A non-hinge telescopic concrete formwork device, characterized in that the top form and side forms are demolded and the insides of other set top forms and side forms can be transported on a cart.