JP2775215B2 - Method and apparatus for placing concrete in concrete structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for continuously placing concrete on a concrete structure, such as an upstream or downstream surface of a dam, using a concrete placing form.

[0002]

2. Description of the Related Art Conventionally, as a method of placing concrete on a concrete structure such as a dam, as shown in FIG. 7, a concrete casting formwork is movably installed on the upper surface of the concrete structure. It is raised by a crane as appropriate, and the raised concrete casting formwork is fixed to the working surface of the concrete structure by an operator, and after the concrete is cast, the worker again releases the fixing of the concrete casting formwork, It is known that concrete is poured over the entire surface of a concrete structure by raising a concrete casting formwork with a crane and repeating this operation.

[0003] In this work, after the concrete is cast, the worker releases the fixing of the concrete casting formwork,
While staying on this concrete casting formwork,
This concrete casting form was raised by a crane, and the concrete casting form was fixed to the next working surface.

In the drawings, reference numeral 60 denotes a concrete casting form, 62 denotes a concrete structure, 64 denotes an upper surface, 66
Denotes a crane, 68 denotes an execution surface, and 70 denotes a worker.

[0005]

Conventionally, as described above,
Each concrete casting form is lifted by a crane,
Move it, fix it by a worker, and after casting concrete,
Since the fixing was released again by the worker and each concrete casting form was lifted and moved by a crane, the work required a long time, and there was a problem in the safety of the worker.

SUMMARY OF THE INVENTION In view of the above drawbacks, an object of the present invention is to provide a method and an apparatus for placing concrete in a concrete structure capable of shortening the working time and improving the safety of workers. Things.

[0007]

According to the method of the present invention, a plurality of frames each having a plurality of frames arranged in parallel in the vertical and horizontal directions are arranged side by side, and the upper edges thereof are connected. A large number of dedicated formwork is placed on the concrete casting surface of the concrete structure, and one of
It has a hoisting mechanism for raising and lowering this dedicated formwork, and raises the concrete casting upper surface of the concrete structure by a movable formwork lifting device, and connects one dedicated formwork to the other connected dedicated formwork. By mounting elevating means which is in a floating state when the form is lifted and individually ascending, each dedicated form can be moved up and down, and the form elevating device is moved by the moving device for the form elevating device. After the concrete form is fixed to the concrete casting surface, the concrete is cast in the form as appropriate, the concrete is cured and hardened, the form is removed, and the form is raised and lowered again. Moving the form lifting device through the apparatus and the moving device for the form lifting device,
By raising one dedicated formwork connected via the form raising / lowering device and individually raising the other dedicated formwork via the lifting / lowering means, concrete is sequentially cast on the concrete placing surface of the concrete structure. The apparatus according to the present invention is characterized in that a plurality of molds each having a plurality of frame bodies arranged in parallel in the vertical direction and the horizontal direction are arranged in parallel, and the upper edge thereof is formed. only type frame connected so composed is arranged a number, a dedicated formwork while continuously connected, the other
Elevating means which is in a floating state when the dedicated form is lifted is provided, a form elevating apparatus installed outside is appropriately connected to the other connected dedicated form, and a moving means is provided in the form elevating apparatus. It is characterized by the fact that

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for placing concrete in a concrete structure according to the present invention will be described with reference to FIGS.

A plurality of molds 14 each having a plurality of frame bodies 12 arranged in parallel in the vertical direction and the horizontal direction are arranged in parallel, and a large number of exclusive molds 16 having their upper edges connected are arranged. Have been. In this embodiment, the upper edges of the formwork 14 are connected by a connection frame 18, and the dedicated formwork 16 is provided with a scaffold 52 for workers.

An elevating means 20 is provided on one of the connected exclusive forms 16a. In this embodiment, the lifting means 2
Reference numeral 0 denotes a winch, and the end of the winch is connected to both sides (one side is omitted in FIG. 1) via a pulley 22.
6b, which is fixed to the lower end of the dedicated formwork 16a provided with the lifting / lowering means 20,
6b can be raised using the fulcrum as a fulcrum. When the dedicated molds 16b on both sides are raised, the elevating means 20 is in a floating state (a state where the load is zero), and the exclusive molds 1 on both sides are moved.
6b is not hindered. When the lifting / lowering means 20 is set in the floating state, the exclusive form 16a provided with the lifting / lowering means 20 is attached to the concrete structure 4a.
2 is fixed to the concrete placing surface 46, so that the dedicated formwork 16a does not drop.

A form lifting device 24 installed outside is appropriately connected to the other dedicated form 16b (both sides) connected thereto. In the present embodiment, the form lifting device 24 includes a winch serving as a hoisting mechanism 30 inside a base 28 provided with casters 26 at a lower portion. Through the casters 26, the form lifting device 24 can freely move on the concrete casting upper surface 44 of the concrete structure 42. The reason that the form lifting device 24 is appropriately connected to the dedicated form 16b is that the dedicated form 16b on the same concrete placing surface 46 of the concrete structure 42 can be sequentially raised. This is because concrete placement is carried out by installing one by one on the same concrete placement upper surface 44 or by moving it from the other concrete placement upper surface 44 and using one form lifting device 24 together.

[0012] The connected two exclusive formwork 16a, 16b are respectively connected by a safety rope 54 in order to improve safety.

There is provided a moving device 32 for the form lifting apparatus for moving the form lifting apparatus 24 to another concrete casting upper surface 44 of the concrete structure 42 which is slightly away. In this embodiment, the moving device 3 for the form lifting device
2, a drive pulley 36 is engaged with a main cable 34 stretched above a concrete structure 42 and wound around the drive pulley 36, as shown in FIG. The upper member 38 is mounted via a hoisting cable 40.

A concrete casting method for a concrete structure according to the present invention will be described with reference to FIGS. 1 to 6 with regard to block casting in a dam (concrete casting of the upstream and downstream surfaces of the dam in an uneven shape, see FIG. 6). Will be explained.

First, one of the connected dedicated forms 16b of a number of dedicated forms 16 arranged side by side is moved up and down on a formwork movably installed on a concrete casting upper surface 44 of a concrete structure (dam) 42. It is raised to a suitable position by the device 24 (see FIG. 2).

Next, the worker descends on the special form 16b along the special form 16b, and fixes the lower part of the special form 16b to the anchor bolt 48 previously mounted on the working surface 46 via the sea bolt 50. .

Next, the worker climbs on the exclusive form 16 along the exclusive form 16b, and puts the upper part of the exclusive form 16b on the working surface 4.
Sea bolt 5 to anchor bolt 48 previously mounted on
Fixed through 0.

Next, concrete is poured into the fixed dedicated formwork 16b and cured and hardened.

Next, after the concrete is hardened, the operator again loosens the upper and lower sea bolts 50 at the upper and lower portions of the dedicated formwork 16b to release the fixing of the dedicated formwork 16b (demolding work), and prepares for the next movement. The dedicated formwork 16b for this movement may be raised continuously and the next concrete casting may be performed. However, in this description, since the block is cast, the removal work is performed by moving the dedicated formwork 16b. Perform only when

The dedicated form 16a is connected to the dedicated form 16a by the elevating means 20 provided on the dedicated form 16a.
When raising a, it raises to an appropriate position by driving the lifting / lowering means 20. At this time, since the tip of the winch, which is the lifting / lowering means 20, is fixed to the exclusive formwork 16b on both sides that are connected to each other, the dedicated formwork 16a is wound by winding the winch around the fixed end of the exclusive formwork 16a as a fulcrum. To rise.

The steps of fixing, releasing, and concrete placing of the raised dedicated formwork 16a are the same as those in the case of the formwork elevating device 24, and the description thereof will be omitted.

Further, when the position of each dedicated form 16 is moved in the horizontal direction (left-right direction in FIG. 1), one dedicated form 16b connected to a number of dedicated forms 16 arranged side by side It is moved by the lifting device 24.

At this time, another concrete casting surface 46
When moving the dedicated formwork 16b, the formwork elevating device 24
Is moved to another concrete placing upper surface 44 by a cable crane, which is another moving device 32 for the form lifting device, and then moved by the form lifting device 24.

On the other hand, the other dedicated formwork 16a connected to the many dedicated formwork 16 arranged in parallel is
Is raised to an appropriate position by the lifting means 20 attached to the device (see FIG. 1).

Fixation and release of the raised exclusive formwork 16a;
The concrete placing process is the same as that of the form lifting device 24, and therefore the description is omitted.

The dedicated formwork 16a provided with the elevating means 20 according to the present invention cannot be located at both ends of the dedicated formwork 16 arranged in parallel. It is necessary to locate a dedicated formwork 16b connected to the form lifting device 24 installed at 44.

The dedicated formwork 16 is provided with a dedicated formwork 16b connected to a formwork lifting device 24 on both sides and a dedicated formwork 16a provided with a lifting means 20 at the center. By raising and lowering and moving as one set, the work efficiency can be improved.

Although the present embodiment is directed to a method of placing a block in a dam, it can also be used in placing concrete for protecting a mountain slope (slope), and it is obvious that the method can be used in other fields. That is.

[0029]

According to the method for placing concrete on a concrete structure according to the present invention, a dedicated formwork for placing concrete is provided by an elevating and lowering device installed on the concrete casting upper surface of the concrete structure . And the other dedicated formwork built into the dedicated formwork itself goes into a floating state when it rises.
That lifting means, each dedicated mold can be separately elevated by, without increasing while riding-only frame worker, it is possible to improve work safety.

In addition, the form raising and lowering device installed on the concrete casting upper surface of the concrete structure can be easily moved by the moving means of the present apparatus itself, and the form raising and lowering device can be easily moved. The work moving device can be easily moved to another concrete placing execution upper surface, so that work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a use state of a concrete placing device for a concrete structure according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of the form lifting device according to the present invention.

FIG. 4 is a side view of the same.

FIG. 5 is a plan view of the same.

FIG. 6 is a front view of the moving device for the form lifting device.

FIG. 7 is a perspective view showing a use state of a conventional example.

[Explanation of symbols]

 Reference Signs List 12 frame body 14 formwork 16 dedicated formwork 20 elevating means 24 formwork elevating device 32 moving device for formwork elevating device 42 concrete structure 44 concrete casting execution upper surface 46 concrete casting execution surface

Continuation of the front page (72) Inventor Koji Iwata 144, 14 Article, Masamasa-machi, Motosu-gun, Gifu Prefecture Gifu Kogyo Co., Ltd. (56) References JP-A-2-108760 (JP, A) JP-A-63-27669 (JP, A) JP-A-62-211461 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 11/22

Claims (2)

(57) [Claims] 1. A dedicated formwork in which a plurality of formwork (14) each having a plurality of frame bodies (12) arranged in parallel in a vertical direction and a horizontal direction are arranged in parallel and their upper edges are connected. A large number of (16) are arranged on the concrete casting execution surface (46) of the concrete structure (42), and one of the dedicated formwork (16b) connected to the concrete form (16b) is raised and lowered. A concrete structure (42) having a hoisting mechanism (30) and a concrete casting surface (44)
It is raised by the movable mold lifting device (24), and the other dedicated mold articulating (16a), one of the dedicated formwork
Elevating means (20) which is idle when rising (16b )
The dedicated formwork (16) can be moved up and down by mounting and individually raised, and the formwork lifting device (24) can be moved by the moving device (32) for the formwork lifting device.
After fixing the special formwork (16) to the concrete casting surface (46), concrete is appropriately cast into the special formwork (16), and the concrete is cured and hardened. The mold is removed, and the form lifting device (24) is moved again via the form lifting device (24) and the moving device (32) for the form lifting device, and is connected via the form lifting device (24). Raise one exclusive formwork (16b),
And the other dedicated formwork (16) via the lifting / lowering means (20).
A concrete placing method for a concrete structure, characterized by sequentially placing concrete on the concrete placing surface (46) of the concrete structure (42) by individually raising a). 2. A dedicated mold formed by arranging a plurality of form frames (14) in which a plurality of frame bodies (12) are arranged in parallel in a vertical direction and a horizontal direction, respectively, and connecting upper edges thereof. A large number of frames (16) are provided, and one of the connected dedicated forms (16a) is allowed to play when the other dedicated form (16b) rises.
An elevating means (20) that is in a moving state is provided, and a form elevating device (24) installed outside is appropriately connected to the other dedicated formwork (16b) connected thereto, and the form elevating device (24)
A concrete placing device for a concrete structure, characterized in that a moving means is provided.