FI117722B - Method and apparatus for producing reinforced joints in a concrete structure - Google Patents

Description

117722

METHOD AND EQUIPMENT FOR THE CONSTRUCTION OF A CONCRETE WORK Seam

The present invention relates to a method and apparatus for making a reinforced work seam of a concrete structure 5 according to the preambles of claims 1 and 5.

Locally cast reinforced concrete structures are divided into workable moldable assemblies. In horizontal seams of vertical structures, such as columns, the reinforcement is allowed to freely rise above the top of the mold, whereupon it is extended by 10 slats to the upper casting part. In vertical seams, such as walls, reinforcement must be introduced through the mold edge. Previously, holes were made in the formwork board for the extension lengths of the brush rods so that the reinforcement would work on both sides of the work joint. The protruding brush bars with sharp cutting points make it difficult to work on the work joint, and removing the perforated mold 15 and cleaning the joint after hardening of the concrete is laborious. Numerous solutions to these problems have been invented over the years, based on box-like structures, with the inside dimensions of the brush rods mounted, and from which the anchor loop protrudes.

Examples of such solutions are DE3223200A1 and FI73491.

The present invention seeks to solve the relatively long extension dimensions placed inside the box and the easy removal of the box after the concrete casts have cured. Also known are solutions in which a disposable, ** 'mounting box is left as part of the final work seam, with various designs »·: y the box part is intended to anchor the work seam to the concrete. One such * ·: · * 25 solution is disclosed in EP322751A1.

In the above inventions, the reinforcing bars have been bent out of the groove formed by the box after dismantling the mold. However, at 90 ° to 2 ***, the bent bar does not straighten completely, whereupon the bar is first straightened under tensile load, causing a crack in the work joint.

: 30 Efforts have been made to solve this problem by developing tools such as. ···. FI94074, or by designing a box section so that the bending point of the reinforcing bar is provided with a recess which is not filled by concrete during the casting step, e.g. EP539845A1.

The concrete elements are joined together by vertical seams. ** ·; 35 principles. The vertical joint is made with grooves that carry shear forces as "· * stakes" and the structure is held together by horizontal reinforcement through the stakes. However, the aim is to keep the working joint between the concrete elements 2 117722 as small as possible, thus speeding up the joint casting. Because of their length, straight, extendable reinforcing bars are not suitable for use in the joints of concrete elements, and due to their stiffness, short bars cannot be properly adjusted. A solution 5 has been developed for this, in which the reinforcement bar is replaced by a wire loop. EP534475A1 discloses a solution in which a piece of wire is made into a loop by a compression sleeve. The compression sleeve member is cast in concrete and the loop member is bent inside the mounting structure. After casting, the assembly cover is removed. The cable loop has an elastic structure and straightens itself. EP 914531 discloses a solution of a wire loop in which the box-like casing structure is provided with gripping loops. This prevents the housing structure from being removed from the work seam.

In the solutions presented, the enclosure structure is disposable, which results in waste of material and increased waste handling. In an effort to conserve raw materials, the housing structure is made of as thin a material as possible. This poses a risk for permanent casing structures that the thin casing structure will be damaged during processing, small dents and wall deformation cannot be repaired at the construction site, and air bags will be left inside the concrete casting during the joining process, which will reduce the load carrying capacity of the joint. Also, in removable enclosure structures, the work joint must not leave pieces of casing that endanger the reinforcement loops. , the success of the joint casting.

DE 1684254 and EP 0534475 disclose a rigid casing structure with a cover, which can be used as a mounting part for the next 25 wire loops.

The reinforcement loops protruding from the work joints vary in length • ·: / ·: depending on the joint structure and the type of casting used. For example, if three walls are joined by a work joint in one place, more casting space is required and therefore reinforcement loops are made longer than usual. For this purpose. ; \ 30 are today stocked with weld joints of various lengths. ···. loop exit dimensions. The use of different types increases the need for transportation and binds capital to storage.

The solution of the invention eliminates the above problems.

The casing structure of the work joint reinforcement is made of a sturdy raw material that · · ·. 35 withstands continuous processing. The enclosure structure can be removed so that on site: ·] *. the concrete structure is the stake structure. The disassembled casing structure will be reassembled * · by placing a cable loop of the required length inside the casing. Typical loop exit dimensions can be marked on the structure to facilitate job 3 117722.

In castings where numerous joint castings are made, the raw material savings are significant and waste treatment is completely avoided. Quantities to be handled during transportation and storage remain small in both size and quantity.

The features of the solution according to the invention are described in detail in the appended claims.

The invention will now be described in more detail by way of example with reference to the accompanying drawings, in which Fig. 1 shows a solution according to the invention at the assembly stage, viewed from the short side of the housing structure.

Fig. 2 shows a solution according to the invention from above, without the roof of the housing when the wire loop is mounted in the housing

Figure 3 is a side view of the roof of a housing structure according to the invention

Fig. 4 shows a housing structure according to the invention, with a pre-installed wire loop, seen from the long side in a section with the side wall removed

Fig. 5 shows a system according to the invention mounted in a mold 20, seen from the short side of the housing structure in a section with the short end side removed. , Fig. 6 shows a ready-made work joint for casting when the mounting parts • »· have been removed from the mold at the stake after curing the concrete casting • 0 • '* in a visible cross-section 25 and having a wire loop 3 threaded through a hole 2 in the bottom of the housing formed by pressing the ends of the wire piece into the sleeve 4. The end wall of the housing shows a hole 10 used to lock the roof panel 6 of the housing. The mounting box is used. 30 reinforced concrete structure for the production of a reinforced work joint, in which the concrete surface is formed by a dowel-shaped submersion 13 (Fig. 6), using a wire loop 3 extending from the surface of the structure, the other end of which is anchored. The wire loop 3 is fitted inside the mounting box 1, and after casting, the wire loop 3 straightens perpendicular to the stake submersion 13 m. ···. 35 with respect to the bottom surface 14 by removing the roof plate 6 which, together with the housing 1, forms a sealed structure sealed from concrete • · • ·, 4 117722

In Figure 2, the wire loop is bent inside the housing structure 1. The top view shows the hole 2 for insertion of the wire loop 3 and the elevation piece 9 on which the wire loop is bent. The figure also shows the gauges 5 used for the different lengths of wire loop outlet dimensions.

Figure 3 shows a steel roof plate 6 of the housing, which includes a sealing projection 7 and a locking pin 8 of the mounting hole 2.

Fig. 4 shows a wire loop 3 mounted on the housing 1 in the housing in a cross sectional view with the side wall removed. Below the folding point of the wire loop 1 10 is an elevation piece 9 which ensures that the folding point of the wire loop 1 in the finished structure remains outside the concrete casting and that the loop is properly aligned when the housing 1 is removed.

Figure 5 shows a system according to the invention pre-installed in a mold. In the figure, the mounting housing 1 is attached to the wood-shaped side panels 12 of the casting mold 15 by a nail 11 pierced through a hole 17 in the base plate 16 of the housing 1. For nailing, the housing structure is provided with a hole of suitable size. In steel-shaped molds, the nailing is replaced by a magnetic fastener.

In Figure 6, the side mold plates 12 of the casting mold have been removed, the casing roof plate 6 20 removed, the wire loop 3 rectified inside the casing 1 and the casing 1 removed by squeezing the wire loop 1 together to fit through the hole 2 in the bottom.

• · · [; *** Start the work joint by taking the necessary cable lengths and mounting boxes • ·: 1. The wire loop 3 is pressed together and 25 threaded into the mounting box 1 through the hole 2 in the bottom of the box and * folded to the required length inside the box 1 using gauges 5. The roof 6 of the housing is locked into the mounting housing 1 by inserting the ceiling locking pin 8 '/ [I into the hole 10 in the end wall and pressing the sealing piece 7 of the bottom hole 2.

. ···. In wood molds, the mounting boxes are fixed to the edge 12 of the mold by nails 11, * · * · [in steel molds, the nailing is replaced, for example, by magnetic fastening.

After the concrete cast has hardened, the mold plates 12 are removed while the nails are released. The roof 6 of the housing is pulled off the mounting housing 1,. 35 The cable loop 3 is removed from the housing and pressed together so that the mounting box otel »« 1 can be removed. The mounting box 1 with roofs 6 is re-used for use, where a new cable loop is threaded into the mounting box. s: 117722 and threaded into mounting housing 1 through hole 2 in bottom of housing and folding length of new wire loop into housing 1 using gauges 5. Housing roof 6 is locked into mounting housing 1 by inserting roof locking pin 8 into hole 10 in end wall

For reuse, the casing structure of the work joint reinforcement is made rigid from a sturdy raw material that is resistant to continuous processing. The mounting housing has a slightly tapered, flat side / end wall 15 towards the base 16 to facilitate removal of the housing.

10 At the construction site, the concrete elements are installed so that the cable loops 3 of the adjacent elements overlap. Anchoring can be ensured by inserting a reinforcing bar in the space between the loops 3. The other half of the work joint is molded and the joint is cast with concrete, after curing the cast is removed and the work joint is ready to be loaded.

It will be apparent to one skilled in the art that various embodiments of the invention are not limited to the example above, but may vary within the scope of the following claims. Thus, the enclosure can be made without a ceiling by sealing the box directly against the mold surface. The hole can be sealed, for example, with a seam band. In addition, it is not necessary to make a hole in the bottom of the housing 20, but only grooves for the Loop, and the roof of the housing may form a side wall.

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Claims (9)

6 117722 Ϊ, I 1, _,: '·'! ι A method for manufacturing a reinforced concrete seam of a concrete structure, the method comprising forming a substantially dowel-like recess (13) in the concrete surface, using a cable loop (3) projecting from the surface of the structure, anchoring the other end (3) is disposed, and after casting, the wire loop (3) is rectified substantially perpendicular to the bottom surface (14) of the stud-like recess (13) by removing the cover structure (6) of the casing structure forming a sealed structure sealed from the concrete in the method, the same casing structure (1) is repeatedly operable as a mounting part of the wire loop (3) such that the casing structure (1) is detachable from the concrete structure, and that the other wire loop is adaptable to the casing structure (1) inserting the required length of the second wire loop into the housing-like structure (1), wherein the housing-like structure (1) has a rigid cover structure (6) that is lockable and detachable to the open, box-like housing structure (1); · * · * Refilling with wire rope loop (3), '** characterized in that the cover structure (6) by means of the protruding part (7) therein seals the bottom hole (2) during the casting of concrete. Method according to Claim 1, characterized in that the wire loop (3) is pressed together and threaded into the housing-like structure (1) through an opening (2) therein and folded into the housing (1) of the required length. . . ·. 30 Method according to Claim 1, characterized in that the required length i i * is folded inside the housing-like structure (1) using gauges (5) or similar measuring means arranged thereon. Method according to Claim 1, characterized in that the roof of the box-like structure is of rigid material and is locked. 35 into the mounting box (1) by inserting the roof locking pin (8) into the hole (10) in the end wall and pressing the sealing piece (7) into the bottom hole (2). • · • ι 7 117722 Apparatus for producing a reinforced work seam of concrete structures, which device is disposed in a substantially stud-like embedment (13) of the concrete surface, comprising a cable loop (3) projecting from the surface of the concrete structure anchored at its other end; 1) into which the wire loop (3) is threadable and from which, after casting, the wire loop (3) extends substantially perpendicular to the bottom surface (14) of the dowel recess (13) by removing the cover structure (6) of the casing structure. forming a sealed structure sealed from concrete, the casing structure (1) being rigid, the casing structure being removable from the concrete structure and being repeatedly used as a mounting part of the wire loop (3) having a cover structure (6) of the same material as the casing structure (1) 6) is lockable and detachable in an open box-shaped box-like structure (1) allowing re-use of the device with a second cable loop (3), characterized in that the cover structure (6) seals the bottom opening (2) by concrete. Apparatus according to claim 5, wherein the housing-like structure (1) has an opening (2) through which the wire loop (3) can be threaded into the structure (1), characterized in that the bottom of the structure (1) has an elevation (9). . from which the wire loop (3) can be bent inside the structure (1). • · »* 1 · 1 Device according to Claim 5, characterized in that the casing-like structure (1) is provided with measuring lines (5) or the like for mounting the wire loop (3) in different outlet dimensions. "2: Device according to Claim 5, characterized in that the side / end walls (15) of the housing-like structure (1) are substantially smooth and slightly tapered towards the bottom to facilitate its removal. , 30 A device according to claim 5, characterized in that: • φ 1. ···. the side wall of the housing-like structure (1) has a hole (10), whereby the cover structure (6) * · * '1 can be locked to the housing-like structure (1) by inserting a pin (8) in the cover structure ) and by fitting the * "1 · 'projection (7) into the opening (2). • · · 2 · 1 •« 8 117722