KR900005971B1 - Moulds for producing concrete-tubular - Google Patents

Abstract

The mould for casting pipes of crooked part comprises an inner crooked mould part having horseshoe shape, an outer crooked mould part having horseshoe shape, a bottom portion having the axis of rotation and an upper mould part. The mould is prepared by the stages of setting up an inner crooked mould on the bottom portion, installing an outer part, covering the upper portion of the mould except for pouring part, lifting and fixing the mould on the axis until the upper portion is in level, pouring concrete, curing and demoulding.

Description

Formwork for manufacturing curved concrete tubes

1 is a front view of a curved concrete tube.

2 is a front view showing a partial cross-section of the formwork of the concrete curved tube as an exemplary view according to the present invention.

3 is a plan view showing a form partial cross section of the embodiment according to the present invention.

4 is a plan view of the formwork of the embodiment according to the present invention.

5 is a side view of the formwork of the embodiment according to the present invention.

6 is a partial vertical cross-sectional view of FIG.

7 is a schematic vertical sectional view of a formwork suitable for the implementation of the bow-shaped curved concrete tube according to the invention.

8 is a vertical cross-sectional view of a concrete tube curved in a horseshoe shape.

9 is a schematic perspective view of the curved formwork of the concrete tube having a cross section shown in FIG.

10 and 11 are cross-sectional views of the partition board coupled to the formwork shown in FIG.

12 is a front view of a concrete curved tube manufactured according to the formwork shown in FIG.

FIG. 13 is a partial sectional view showing a deformation of the formwork shown in FIG.

14 and 15 are perspective views of the split formwork of the concrete curved tube.

16, 17, and 18 are cross-sectional views of concrete curved tubes of various types.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork for producing concrete curved pipes laid in curves in sewers, underpasses, in particular horseshoe type precast concrete products having arched portions.

Conventionally, this kind of concrete curved pipe is manufactured by being composed of an internal formwork that forms the cavity and an external formwork that forms an outer shape, since it has a cavity inside and is bent at an angle. In order to facilitate the assembly of the formwork and the separation of the formwork from the product, such formwork parts are divided into appropriate components and assembled using bolts or the like. However, the simple division of formwork parts does not facilitate assembly and disassembly of formwork. In fact, this type of conventional formwork is particularly difficult to dismantle the inner formwork.

It is an object of the present invention to provide a formwork which facilitates the manufacture of curved concrete tubes in which the pipe parts are connected to each other at a desired angle θ while being easy to assemble, dismantle and position the formwork.

Still another object of the present invention is to provide a formwork having a simple structure and easily manufacturing concrete pipes of various curved shapes.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 show an embodiment of the form according to the invention. The formwork is composed of another inclined tubular body (B) similar to the inclined cast concrete tubular body (A) having a horseshoe-shaped cross section consisting of an arched portion (α), a side portion (β), and a bottom portion (γ). As shown in the figure is to be used for the manufacture of the curved concrete tube connected to form an angle (θ) to each other. Such concrete curved tubular bodies are manufactured according to tubular axes L _A and L _B extending vertically.

As shown in FIGS. 2 to 4, the formwork is composed of an inner formwork 2 having a horseshoe-shaped cross section for forming an internal cavity of a curved tube and an outer formwork 3 having a horseshoe-shaped cross section for forming an external structure. It is.

In more detail, the inner formwork 2 consists of an upper inner formwork part 2A and a lower inner formwork part 2B, which are connected to each other.

As shown in FIG. 2, the inner formwork 2 and the outer formwork 3 have their lower ends fixed to the support 40. The supporting portion 4 has one end connected to the horizontal support 41 so that the axis L _A of the upper inclined tube _A is vertical and the axis L _B of the lower inclined tube B is vertical. The pivoting motion is performed by the angle θ between these vertical second positions. The first position is determined by the brace 42, and the second position is determined by removing the brace 42 and placing the support 40 on the support 41.

The cross-sections of the inner formwork 2 and the outer formwork 3 will be described in detail with reference to FIGS. 3 and 4 as follows. Each of the inner formwork portions 2A and 2B is connected to one inner formwork member 5 for the arch portion α, and both ends of the inner formwork member 5 can pivot, respectively, and the side portion β And a pair of L-shaped inner side formwork members 6 and 6 extending over the bottom surface portion γ and forming an approximately L-shape and end portions of the inner side formwork members 6 and 6, respectively. It consists of a separable inner formwork member 7.

Guide rails 42 having inclined engagement surfaces 42a are attached to both ends of the separable inner formwork member 7 formed in an inwardly wedge shape.

A guide rail 43 having an inclined coupling surface 43a for engaging with the inclined coupling surface 42a is attached to the ends of the inner side formwork members 6 and 6.

The outer formwork 3 has two outer formwork members 10 and 10 covering the arch portion α and the side portion β and the outer formwork member 10 to cover the bottom portion γ. 10) is composed of an outer auxiliary die member 11 to close between.

As can be seen in FIGS. 2 and 6, a space S is placed on the supporting portion 40 with a wooden member 13 for forming a coupling end around the concrete tube hole. The inner formwork members (5) (6) (7) and the outer formwork members (10) (11) for the lower inclined tube (B) are the nuts (14) and the outer formwork fixed to the lower part of the inner formwork (2). They are assembled by assembling with each other using bolts 15 extending through the space S from the bottom of (3).

Another wooden member 16 for forming a coupling groove around the other hole of the concrete tube is fixed to the upper end of the outer formwork members 10, 11. As can be seen in FIGS. 2 and 3, the upper part of the formwork is easily connected and secured by using the connecting devices 17 that are easily adjustable in width. Each of the connecting devices 17 is attached to the upper end of the inner formwork members (5), (6) and (7) so that one end of the connecting device (17) can be rotated vertically and the other end (18) has a nut (18). (19) and the binding portion 20 which is fixed to the upper portion of the outer formwork members 10, 11 can be fixed to the nut 18.

Assembly of the formwork starts from the state shown by the dashed line in FIG. With the removable inner formwork member 7 removed, the inner formwork portion 2B for the lower inclined pipe B is inwardly positioned on the support 40. Then open the inner formwork part 2B outward, lift off the detachable inner formwork member 7 and engage it with the end of the inner side formwork member 6, 6 using a bolt or tapered pin. Connect. The reinforcing bars (not shown) are then reinforced and the prefabricated inner formwork part 2A for producing the upper inclined pipe body is connected to the inner formwork part 2B for producing the lower inclined pipe body.

The outer main formwork members 10 and 10 and the outer auxiliary formwork 11 are then assembled to each other to connect the outer formwork 3 to the inner formwork portion 2A for the upper inclined tube A. After the assembly is completed by the above-described method, the support 4 is rotated by an angle θ, and the tube shaft L _A is positioned vertically.

The concrete is poured into the formwork and the spices are intact. When dismantling the formwork from the concrete product, the outer formwork 3 is separated from the inner formwork part 2A for the upper inclined pipe body A and separated from the concrete product. Then, the detachable inner formwork member 7 of the inner formwork portion 2A is separated, and the inner side formwork members 6 and 6 are pivoted inward. Then, the inner formwork 2A is lifted off the concrete product and separated.

Then, the concrete product remaining in the inner formwork part 2B for the lower inclined pipe body is pivoted along with the inner formwork part 2B by an angle θ and placed at the position shown by the dashed line in FIG. In this state, the concrete product can be lifted off from the inner formwork 2B.

Curved concrete tubes having different cross-sectional shapes can be produced using formwork parts tailored to the cross-sectional shape of the desired product according to the formwork of this embodiment.

7 to 15 show another embodiment of the formwork according to the present invention for producing curved concrete tube C curved at a constant bending angle. In this formwork, the inner formwork 2 and the outer formwork 3 are curved at a constant curve. The opening ends 52 and 53 formed between the dies 2 and 3 are formed by closing the diaphragms 50 and 51, and the diaphragm 54 extends to an arbitrary position by opening the curved portion. A curved concrete tube body having a desired angle can be formed.

As shown in FIG. 8, an embodiment suitable for producing a curved tube C having a horseshoe-shaped cross section consisting of one arch-shaped portion α, a side portion β and a bottom portion γ will be described. As follows.

As can be seen from FIG. 9, the curved concrete tube C is formed in a reverse arch state. In more detail, the outer formwork 3 is formed to cover the arch-shaped portion α and the side portion β. The upper part of the outer formwork 3 is left uncovered.

The inner formwork (2) is connected to both ends of one inner formwork member (5) and the inner formwork member (5) for the arch-shaped portion (α) and the bottom portion (γ) through the side portion (β) And a detachable inner formwork member (7) joined between an end of the pair of side formwork members (6) (6) and the inner side formwork members (6) (6) extending in a substantially L shape. Consists of.

By this structure, the formwork can be easily separated by separating the removable inner formwork member 7 and then turning the pair of inner side formwork members 6 and 6 inwards.

The diaphragms 50 and 51 have a shape corresponding to the horizontal open portion formed between the inner formwork 2 and the outer formwork 3. The wooden members 54 and 55 for forming the coupling end portion 52 and the coupling recess portion 53 around the hole of the curved tube C are attached to the inner surfaces of the diaphragms 50 and 51.

Preferably, the inner formwork 2 has the same length as the length of the curved tube C to be produced.

In the manufacture of the curved concrete tube (C), the steel cage (Cage) is installed in the outer formwork (3), the inner formwork (2) and the diaphragm (50) (51) is installed, and then the concrete is poured into the formwork.

The disassembly of the formwork can be easily separated by removing the inner formwork 2 and then lifting the curved tube C.

As shown in FIG. 12, since the curved tube C is curved at a constant curved angle, the PC bar can be easily inserted using a cover 56 having a curved angle that matches the curved angle of the curved tube C. FIG. can do.

As shown in FIG. 13, the height of the curved tube C is added to the inner side formwork members 6 and 6 with a linang plate 58, and a similar plate 59 to the upper end of the outer formwork 3 is provided. Can be adjusted as desired.

As shown in FIGS. 14 and 15 degrees, when the curved group (C) has a horizontal split shape, the half-pipe is manufactured by using half formwork separately, and one side forms the inner formwork part 2a and the outer formwork part. (3a), and the other half consists of the inner formwork part 2b and the outer formwork part 3b. If the concrete tube has a symmetrical cross section with respect to the horizontal plane, it is not necessary to branch both halves of the formwork. That is, in such a case, the half tube can be continuously manufactured by using the half die formed by one half inner die part and one half outer die part.

The above embodiment has been specifically described for an ordinary tube having a horseshoe-shaped cross section. However, to those skilled in the art, this embodiment is equally applicable to other various cross-sectional curved tubes having a horseshoe-shaped inner cavity (see FIG. 16) or forming a rectangular inner cavity (FIG. 17) or a circular inner cavity (FIG. 18). It can be seen that.

As is apparent from the above description, the present invention provides the following advantages.

(I) In the manufacture of curved concrete tubes in which the tubes are connected to each other at an angle θ, the formwork is arranged to manufacture the tubes by placing the axes of the tubes approximately perpendicular to each other, and the inner formwork is provided with a portion for the upper inclined body and the lower inclined body. Divided into parts. At this time, the formwork can be fixed to the position where the axis of the upper inclined tube vertical and the position of the axis of the lower inclined tube vertical.

Therefore, the separation of the formwork from the product is very easy because of the simple structure.

(II) In the manufacture of the curved tube body, the inner and outer formwork portions are curved to a constant curvature, and the opening between these inner and outer formwork portions can be closed at any position using a diaphragm. Therefore, curved concrete pipes connected at various angles can be manufactured with a relatively simple device.

Claims (13)

It consists of one inner shaft formwork part (2) and one outer formwork part (3), and the upper inclined pipe (A) and the lower inclined pipe (B) to be used in the manufacture of a curved concrete tube in which the inclined angle θ is connected to each other In the formwork, the inner formwork part 2 is composed of inner formwork parts for the upper and lower inclined pipe bodies, and the inner formwork and outer formwork parts are pivoted by an inclination angle θ so that the axis of the upper inclined pipework is vertical. Formed to form a curved concrete tube, characterized in that to be fixed to a position to form a vertical position and the axis of the lower inclined tube. The method according to claim 1, wherein the support 40 is attached to the lower end of the inner formwork part 2 and the outer formwork part 3 is curved, characterized in that connected to one end of one support (41) Formwork for the production of shaped concrete pipes. The formwork for producing concrete tubes according to claim 1, wherein the curved concrete tube has a roughly horseshoe-shaped cross section comprising an arched portion α. 4. The inner formwork part (2) for the upper and lower inclined tubes is according to claim 3 at one end of the inner formwork member (5) and the inner formwork member (5) for the arched part (α). A pair of substantially L-shaped inner side formwork members (6) (6) and the inner side formwork member (6) pivoted so as to extend beyond the side portion (β) to the bottom portion (γ) and pivot. Formwork for producing concrete tubular body consisting of one separate inner formwork member (7) coupled between the ends of the (6). Arched inner formwork and arched outer formwork curved to a constant curvature Dishes 50 and 51 for closing both opening ends of the space between the inner and outer formwork in an arbitrary position by opening the curved portion. Formwork for the production of curved concrete tubes consisting of. 6. The formwork for manufacturing a concrete tube according to claim 5, wherein the curved concrete pipe has an arch-shaped portion (α) and has a substantially horseshoe-shaped cross section. 7. The formwork for manufacturing a concrete tubular body according to claim 6, wherein the concrete tubular body is disposed so that the arch portion (α) faces downward. The inner formwork part (2) is pivotally connected to one inner formwork member (5) for the arch-shaped portion (α) and to both ends of the inner formwork member (5), respectively, and a side part. A pair of substantially L-shaped inner side form members 6 and 6 and ends of the inner side form members 6 and 6, which extend past (β) to the bottom portion γ and are capable of turning. Formwork for the production of concrete pipes consisting of a separate inner formwork member (7) that is to be coupled between. 8. The inner formwork part (2) is pivotally connected to both ends of one inner formwork member (5) for the arch-shaped part (α), and the bottom part (besides the side part (beta)). a pair of approximately L-shaped inner side formwork members (6) (6) that is capable of pivoting to extend γ) and an end of the inner side formwork members (6) (6). Formwork for the production of concrete pipes consisting of a separate inner formwork member (7). 6. The formwork for manufacturing a concrete pipe according to claim 5, wherein the curved concrete pipe has a quadrilateral cross section. 6. The formwork for manufacturing a concrete tube according to claim 5, wherein the curved concrete tube has a circular cross section. 12. Formwork for producing a concrete tubular body according to any one of claims 5, 6, 7, 8, 9, 10 and 11, wherein each inner and outer formwork portion is divided into two halves based on a horizontal plane. Concrete according to any one of claims 5, 6, 7, 8, 9, 10 and 11, wherein the extension plate is further attached to each of the inner and outer formwork to adjust the height of the curved concrete tube. Formwork for tube production.

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