JPH06264641A - Self-lifting concrete form - Google Patents

Abstract

PURPOSE:To construct a trapezoidal concrete structure from the lower most level by a simple structural means, by providing corner forms, rectangular plane forms, and a trapezoidal form obtained by removing a part of a plurality of parts and making the next rod form and then jointing the tops of both corner forms with a connection member. CONSTITUTION:This concrete form is composed of four corner forms 1, 2, connection members thereof 3, 4, two rectangular plane forms and two trapezoidal forms 10, and connection members thereof 20-22. After one rod of placing concrete has been completed, The coupling of the connection members 3, 4 is disconnected and the corner forms 1, 2 are raised. And then a framework is made by the connection members 3, 4 corresponding to the next rod and a part of the trapezoidal forms 10 is removed to form a shape corresponding to the next rod. Then the trapezoidal form 10 is lifted and assembled by receiving the reaction with the corner forms 1, 2 and the connection members 3, 4. In this way, a trapezoidal concrete structure can be constructed from the lowermost level and the construction period can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled formwork for constructing a box-shaped concrete structure having a trapezoidal side surface, such as a bridge pier or a chimney, which does not have high concrete pouring height.

[0002]

2. Description of the Related Art For such concrete structures,
Conventionally, a self-climbing form F in which a frame a, a rail c and a scaffold d are provided on a base a as shown in FIG. 24 is used, and as shown in FIG. Is lifted up and fixed by anchor bolts (not shown) embedded in the wall body e, and then, as shown in FIG.
Then, the reaction force was taken to raise the form b together with the base a and the concrete was poured.

That is, as shown in FIG. 27, a pair of self-climbing forms F are arranged on both sides of a triangular fixed leading formwork f having the same slope as the slope C of the pier (FIG. 10), and one rod is successively inserted. The form b is raised one by one, and concrete is poured (FIGS. 28 and 29).

[0004]

The conventional self-climbing foam, that is, the self-climbing formwork has a large structure, and since the reaction force is applied to the rail c to raise the formwork b, the construction is performed from the bottom. Can not be done and requires only a few climbs, which is inefficient and prolongs the construction period.

It is an object of the present invention to provide a self-elevating formwork having a relatively simple structure and capable of constructing a trapezoidal concrete structure from the bottom.

[0006]

According to the present invention, there is provided a box-shaped mold having one side surface of a trapezoid, the corner part mold, the rectangular plane part mold, and a plurality of parts. A trapezoidal part form which allows the shape of the next rod to be obtained by removing a part of the part, a connecting member for connecting the top part of the corner part formwork to form a frame, and the corner part formwork and the trapezoidal part formwork. And a connecting frame for framing.

[0007]

In the self-elevating formwork constructed as described above, when the casting of one rod is completed, the connection of the connecting material is released to raise the corner formwork, and the connecting material corresponding to the next rod is used. A part of the trapezoidal part frame is removed together with the connecting frame to form a shape corresponding to the next rod. Next, a reaction force is applied to the corner part formwork and the connecting material to suspend the trapezoidal part formwork to assemble a formwork corresponding to the next rod.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2 for explaining an embodiment of the present invention with reference to the drawings, a self-elevating form A of the present invention is
Corner parts formwork 1, 2 and two rectangular plane part formwork 5,
6 and two trapezoidal part molds 10, connecting members 3 and 4 for the corner part molds 1 and 2, and a plurality (three in the illustrated example) of both part molds 5, 6, 10 and 10. A scaffold D composed of connecting frames 20, 21, 22 and for assembling a reinforcing bar and a form shown in FIG.
Is provided.

The corner mold 1 is on the long side of the trapezoid,
The corner part formwork 2 is on the short side, and the top parts thereof are connected to each other by connecting members 3 and 4.

The rectangular flat surface form 5 is on the long side of the trapezoid, and the rectangular flat surface form 6 is on the short side.

A trapezoidal part formwork, generally designated by reference numeral 10, is a plurality of (four in the illustrated example) first formwork 1 divided in the lateral direction.
It is composed of a first mold frame 12, a second mold frame 12, a third mold frame 13 and a fourth mold frame 14. One side of the first formwork 11 is formed to have the same slope as that of the concrete structure shown in FIG. 10, that is, the slope side C of the pier B. Moreover, the 2nd-4th formwork 12-
14 is the structure A in the fully assembled state shown in FIGS. 1 and 2.
Forming the trapezoidal part formwork 10 of the formwork A for placing the second rod B2 and removing the second formwork 12 shown in FIGS. 6 and 7, the formwork for placing the third rod B3 A second trapezoidal form 10a of A1 is formed, and the second and third forms 1 shown in FIGS. 8 and 9 are formed.
In the state where 2 and 13 are removed, the trapezoidal part form 10b of the form A2 for placing the fourth rod B4 is formed.

Of the three connecting frames 20 to 22, the lowermost connecting frame 20 will be described with reference to FIGS. 3 to 5. The connecting frame 20 includes an inner cylinder 23 made of four L-shaped rectangular cylinders.
The rectangular shape into which these inner cylinders 23 are inserted is defined by the short outer cylinder 24 on the flat surface molds 5 and 6 side and the long outer cylinder 2 on the trapezoidal mold 10 side.
It consists of 6.

The inner cylinder 23 and the short outer cylinder 24 are the inner cylinder 2
3, a wedge-shaped hole 23a formed in the third outer cylinder 24, through holes 24a and 24b formed in the short outer cylinder 24, and a wedge 2 engaging with both.
5 extends from the state shown in FIG. 4 to the state shown in FIG. That is, the long outer cylinders 26, 26 are expanded to the outside and the form 1
It is designed to stretch 0 and 10.

The long outer cylinder 26 is composed of connecting portions 27, 28 into which the inner cylinder 23 is inserted, and three joint portions 29, 30, 31 flange-connected to both. The connecting frames 21 and 22 have substantially the same structure as the connecting frame 20. Although not shown, the long outer cylinder 26 is also connected to the inner cylinder 23 by the wedge 25.

The first, third, and fourth molds 11, 13, and 14 having the above-described structure and having the second mold 12 removed are connected to the connecting portion 2.
7 and the joint part 29 are removed from the connection frames 20a to 22a to form a form A1 (FIGS. 6 and 7) for the third rod B3, and the third form 13 is removed first, Fourth formwork 1
Connection frames 20b to 2 in which the joint portions 30 and 31 are removed from the connection frames 1 and 14
The frame A2 for the fourth rod B4 (FIGS. 8 and 9) is obtained by connecting with the 2b.

Next, a mode of construction will be described with reference to FIGS.

FIG. 10 shows a pier B constructed with the formwork of the present invention. That is, the bridge pier B is composed of a first rod B1 which is a base and second to fourth rods B2 to B4 which are sequentially placed on the first rod B1.

First, the mold A is placed on the first rod B1 and the second rod B2 is placed (FIG. 11).

Next, the chain block 40 provided on the scaffold D lifts the corner form 2 to the driving position of the second rod B2, and the first rod B is formed by a foam tie (not shown).
It is fixed to the upper part of 1 (Fig. 12).

Next, similarly, the corner part form 1 is suspended (FIG. 13), and the top parts of both corner part forms 1 and 2 are connected by connecting members 3a and 4 to form a frame (FIG. 14).

Then, the second formwork 12 of the trapezoidal form 10 is removed to form the trapezoidal form 10a (FIG. 15), which is connected by the connecting frames 20a to 22a, and then the chain block provided on the connecting member 3. Lift by 41, hammer in the wedge 25, eliminate backlash, and form A3 for the third rod (Fig. 17)
Are assembled and fixed to the second rod B2 with a foam tie.

Then, the third rod B3 is driven (see FIG. 1).
7).

Next, the form ties are removed, the corner formwork 1 and 2 are suspended (FIG. 18), the connecting frame is connected by the connecting material 3b, and the third formwork is removed (FIG. 19).

Next, after forming the trapezoidal part form 10b and connecting it with the connecting frames 20b to 22b (FIG. 20), hoisting, driving in the wedge 25, and eliminating the backlash, the form A2 for the fourth rod is assembled, Form tie with third rod B3
Then, the fourth rod B4 is fixed and fixed (FIG. 21).

Then, the form tie is removed and the form A2 is hung on the first rod B1 (FIG. 22), dismantled and removed to complete the construction of the pier B (FIG. 23).

[0026]

Since the present invention is constructed as described above, the trapezoidal concrete structure can be constructed from the lowermost portion, and the construction period can be shortened.

Further, it can be provided at a low cost with a relatively simple structure.

[Brief description of drawings]

FIG. 1 is a top view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a perspective view showing a connecting frame.

FIG. 4 is a side cross-sectional view of an essential part showing a state before driving the wedge in FIG.

5 is a side cross-sectional view of a main part showing a state where the wedge of FIG. 3 is driven in.

FIG. 6 is a top view showing a mold for a third rod.

FIG. 7 is a side view of FIG.

FIG. 8 is a top view showing a mold for a fourth rod.

9 is a side view of FIG.

FIG. 10 is a side sectional view showing a pier built with the formwork of the present invention.

FIG. 11 is a side sectional view showing when the second rod is driven.

FIG. 12 is a side cross-sectional view showing a case where one corner part form is lifted.

FIG. 13 is a side cross-sectional view showing the other corner part frame being lifted.

FIG. 14 is a side cross-sectional view showing the corner part form during assembly.

FIG. 15 is a side sectional view showing a state where a trapezoidal part form is partially removed.

FIG. 16 is a side cross-sectional view showing the assembling of a mold for a third rod.

FIG. 17 is a side cross-sectional view showing when a third rod is driven.

FIG. 18 is a side cross-sectional view showing the corner portion of the formwork being lifted.

FIG. 19 is a side cross-sectional view showing the corner part frame assembly and the trapezoidal part frame part removal.

FIG. 20 is a side sectional view showing a state where a trapezoidal form is assembled.

FIG. 21 is a side sectional view showing the time of assembling and placing the fourth rod form.

FIG. 22 is a side sectional view showing a case where the formwork is hung.

FIG. 23 is a side cross-sectional view showing when the formwork is dismantled and removed.

FIG. 24 is a side view showing one state of construction using a self-climbing form.

FIG. 25 is a side view showing a state in which the rail is lifted up by separating the formwork from the wall body.

FIG. 26 is a side view showing a state where the formwork is raised to the next position.

FIG. 27 is a side view showing a state of construction of a bridge pier using a self-climbing form.

FIG. 28 is a side view showing a state where the formwork is raised.

FIG. 29 is a side view showing a state in which the mold is further raised.

[Explanation of symbols]

 A, A1, A2 ... Self-raising mold B ... Pier B1 ... First rod B2 ... Second rod B3 ... Third rod B4 ... Fourth rod C ... Slope D ... Scaffold F ... Self-climbing form a ... Base b ... Formwork c ... Rail d ... Scaffolding e ... Wall body f ... Preceding formwork 1 2 ... Corner part formwork 3, 3a, 3b, 4 ... Connection material 5, 6 ... Rectangular flat surface part formwork 10, 10a, 10b ... Trapezoidal part formwork 11 ... 1st Formwork 12 ... Second formwork 13 ... Third formwork 14 ... Fourth formwork 20, 21, 22 ... Connection frame 23 ... Inner cylinder 23a ... Wedge-shaped hole 24 ... Short outer cylinder 24a, 24b ... Through hole 25 ... Wedge 26 ... Long outer cylinder 27, 28 ... Connection part 29-31 ... Joint part

Claims (1)

[Claims] 1. A box-shaped mold having a trapezoidal shape on one side, which is composed of a corner part mold, a rectangular plane part mold, and a plurality of parts. A trapezoidal form having a shape, a connecting member for connecting the tops of the corner forms to form a frame, and a connecting frame for connecting the corner form and the trapezoid form to form a frame are provided. Self-propelled formwork characterized by that.