LT4229B - Contraction joint rail - Google Patents

Abstract

Contraction joint rail for fitting in a wall (4) to be concreted and the use of such a rail which consists of a strip-like bar (1) with a device fitted to it forming an injection channel (2) extending over the length of the bar (1). The bar (1) may consist of a thin-walled plastic component, sheet zinc or the like. The device forming the injection channel (2) may be a foam strip (12) applied to the bar (1). The bar (1) may be fitted on both sides with a device forming an injection channel (2) and/or have perforations (5) permitting the penetration of a sealing material. The contraction joint rail of the invention is applied to an area of the wall (4) to be concreted and extends over the entire heigh of the wall (4), whereby after the wall (4) has been concreted, sealing material is sprayed into the injection channel (2) thus formed.

Description

The invention relates to the construction industry and describes a seam allowance.

As the elongated continuous wall is poured and dried, cracks appear in the concrete. Such a wall becomes permeable to water. Therefore, especially if the wall is frequently exposed to moisture, there are pre-made seams at certain points by inserting elements that reduce the cross-section of the wall. At the same time, these elements seal the seams so that the wall is impermeable to water.

Typically, sealing tubes are used to seal such seams. Such a tube consists of a tubular connection strip and a rigid tube.

The cross-section of the wall is reduced by installing a seam sealing tube in the center of the wall and at the same time installing triangular strips inside and out. In this way, cracks occurring when the concrete is compressed are localized and sealed with a joint strip.

In this process, the tubular joint strip is welded to the horizontal joint strip at the junction of the floor panel and the wall, resulting in a waterproof elastic layer.

This type of seam sealing tube has the disadvantage that it is not placed on the surface of the floor slab over which the wall is cast, otherwise water can penetrate the longitudinal direction of the seam.

There are known shrinkage seams made of appropriately formed plates with hollow chambers or continuous elements with several longitudinal chambers. These joints have swelling strips arranged in a longitudinal narrow side groove. The swelling strip is also installed and flush with the floor on the narrow side of the pool. It is designed to reliably seal the seam between the floor slab and the cast concrete wall. Swelling sealing strip located on the floor side of the sump, which is then joined to the longitudinal stripping sealing strip of the casting wall.

The hollow chambers used for this purpose are made of plastic material. Very thick swelling strips must be used to ensure reliable sealing, which in turn greatly increases the cost of shrinkage seams, or else the sealing effect will be very limited, especially at high localized water pressures. In addition, swelling sealing strips seal the seam only from the outside. Sealing the seam from the inside is only possible with a very expensive external injection method.

The sealing strips swell when exposed to water. The swelling agent is a hydrophilic mass contained in a carrier, usually chloroprene rubber. The carrier provides the swelling agent with stability and elasticity. Hydrophilic (water-absorbing) components absorb water molecules and thus increase their volume 1.5-4 times. This creates a pressure of up to 6.5 atm that fills the adjacent hollow cavities and prevents water from entering them. When using such swelling agents, it should be borne in mind that they do not expand abruptly, this process takes hours or days, and is limited in regions with significant changes in wet and dry periods. However, these agents have one distinct advantage which makes them very widespread: they reliably seal joints between different materials such as concrete and plastic, concrete and iron, and so on.

There are known sealing devices for sealing a seam between two concrete sections forming a channel through which a sealing agent can be injected into the seam.

The patent CH-PS 600 077 describes a tube consisting of a spring housing enclosed by a first tube made of woven material, which in turn is enclosed by an outer mesh porous tube. After the sealing device is installed and the second concrete section is poured, the sealing material is pressed into a tubular sealing device which seals the defective areas of the concrete slab. However, such a device is quite complex.

In order to better protect such porous pipes from clogging with concrete slurry, DE 8 335 231 UI proposes the use of a non-woven material between the spring body and the outer mesh tube, which is permeable to liquid but does not pass through fine concrete particles.

DE 8 608 396 discloses another sealing device in the form of an injection tube which, on the one hand, is easy to install and, on the other, reliably seals the seam in the longitudinal direction of the tubular body.

The construction of these tubular seals is complex and expensive. Furthermore, there is a risk that these tubular seals may be compressed during the casting of the concrete wall and it will be impossible to inject the sealant.

EP 0 418 699 A1 discloses a sealing device having an open profile cross-section with free longitudinal ribs in the lateral regions, which is mounted on a concrete surface such that a channel for sealing material is formed between the profile and the concrete surface. The sealant, which is injected into the duct between the free longitudinal ribs and the concrete surface, penetrates into the defective areas of the concrete surface.

Another sealing device described in the same invention has a housing consisting of a foam or foam strip having cells of rectangular cross-section. Mounted on a concrete surface, the body of the device forms a conduit for sealing material that penetrates the seam through the cells.

Although a sealing device has many advantages over conventional pipes, it is not intended for sealing seam seams, since the open single-sided profile must be installed on the concrete surface of the finished floor slab to form the injection channel. Meanwhile, the joint sealing device is covered with concrete on both sides, so such an open one-sided profile could be filled with concrete.

From the patent DE 9 320 134 UI there is a known injection seam allowance. This seam allowance is formed on both sides by an extruded profiled rod with at least one continuous longitudinal channel at its center. A cutout is made along this passage, which is an outlet which is closed by a sealing strip. This strip acts as a valve, i.e. it opens during injection of the liquid and discharges it from the injection duct.

Compared to a conventional non-injection seam seam, the procedure for injecting a sealing member into this seam seam is significantly less expensive. However, installing an injection duct sealed with a special shape sealing strip is very expensive. The cost of installing such a buffer is further increased by the fact that such injection channels must be made on both sides.

A simpler version of the seam joint with seals on both sides is described in DE 4 140 010 Al. An injection channel is made on one side of this seam and on the opposite side a swelling strip is attached. The injection channel and swell strip thus installed are on opposite sides of the mouthpiece.

DE 9 315 974 discloses a syringe having an injection tube. The injection tube is arranged approximately in the middle of the continuous wall of the seam, in the clearance between the seam wall and the sealing wall.

All of the above joints seal the seam seams quite reliably, especially if injection ducts are provided on both sides. If the seam allowance of the seam is simplified, the cost of installing it is reduced, but the reliability of the seam is reduced.

There are many inexpensive, simple construction joints, but they all have only one injection channel per side, so they seal only one side of the seam. Therefore, a simple construction, inexpensive seam allowance is required, which reliably seals the seam with an injection-sealing agent.

The object of the present invention is to provide a simple, inexpensive, prefabricated concrete wall installation device for sealing shrinkage seams.

This purpose is accomplished by an inexpensive and simple construction of the sealant, which is preloaded at the point of the seam and which seals it into a sealing material injected into the injection channel made along the entire length of the crossbar.

The transverse contact area of the seam allowance with the injection channel is perforated so that the sealing agent can penetrate the opposite sides of the concrete wall even when the seam allowance has only one injection channel. This seals the seam easily but reliably.

Two injection channels may be provided on opposite sides of the perforated area. Their cross-sections are then reduced as the two injection channels communicate with one another through openings in the cross-section of the outlet and complement each other in functional terms.

The invention is further described with reference to the drawings in which:

Fig. 1 shows a first embodiment of a savings device;

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1;

Figure 3 illustrates a second embodiment of a savings device;

Fig. 4 is a cross-sectional view taken along line B-B of Fig. 3;

Fig. 5 shows a bar with a swelling strip;

Fig. 6 is a cross-sectional view of the seam shown in Fig. 5;

Fig. 7 shows a barrel with a hollow injection channel;

Figure 8 is a cross-sectional view of the bar shown in Figure 7;

Fig. 9 shows a channel for injection of sealing material;

Fig. 10 is a confluence with an injection tube;

Fig. 11 is a cross-sectional view of the seam shown in Fig. 10; and

Figure 12 is a cross-sectional view of yet another confluence.

The seam allowance according to the present invention consists of a strip cross member 1 and an injection channel forming element arranged along the entire length of the cross section cross member 1 6.

The cross-member 1 of the assembly is made of a thin-walled metal sheet. It has two longitudinal edges la, upper and lower transverse ribs lb and two bounded surfaces lc.

The device forming the injection channel (2) may be a conventional injection tube or may consist of a hollow device mounted on a surface lc. The foam strip 12 is used to form the injection channel 2.

The width of the crossbar 1 is slightly smaller than the thickness of the molding wall, so that it is concreted into the wall one or more centimeters from the outer surface of the wall. The cross-section can also be reduced by installing triangular ribbons on the outside of the wall. The length of the crossbar 1 must be approximately the height of the wall, the crossbar 1 is placed before the wall is concreted on the floor panel part 3 and its top is aligned with the top of the wall to be concreted.

The foam web 12 has a rectangular cross-section and is shaped such that the foam web 12 is not compressed by the concrete surrounding it and is permeable to the injection-sealing material. The size of the cross-section of the foam strip 12 must be appropriate to the size of the space to be sealed. If the cross-section of the injection channel is too large, it is difficult to create a sufficiently high pressure to inject the sealant.

The foam web material 12 is a porous, extremely rigid plastic material.

Apertures 5 are provided in the area of contact area 1 with the foam web 12 so that injection sealing material can penetrate to the other side of area 1.

The foam strips 12 may be provided on either side of the seam bar 1 or on both sides of the bar lc. In this case, the injection channels 2 are formed on both sides of the rail 1. Although the two foam strips 12 do not contact each other, the injection pressure of the openings 5 in the transverse 1 creates a compensation pressure during injection of the sealing material. Therefore, the cross-sectional surface or thickness of the foam web 12 may also be smaller, since the local functional limitation of the foam web 12 in a parallel-directed channel may be offset on the other side of the web.

Ideally, the foam strips 12 are provided through the center lc of the transverse surface 1 of the seam.

Thus, both water passages are sealed along both transverse surfaces lc of the mouthpiece by providing openings 5 and one foam strip 12 forming the injection channel 2, or by installing two foam strips 12.

The injection channels 2 may also be provided at one of the lateral longitudinal ribs la of the seam cross member 1. In this case, the injection channel 2 is located near the wall surface. Therefore, there is a risk that injected sealing material may penetrate the outside of the wall and that the seam will not be properly sealed in the event of pressure drop.

The cross-member 1 of the assembly is a thin-walled element which may be made of plastic or metal. The foam strip 12 is glued to the crossbar 1 of the seam.

The crossbar 1 is either a plate-shaped member (Figs. 1 and 2) or it may be a profiled member (Figs. 3 and 4) having a slot for a foam strip 12. The profiled crossbar 1 is stiffer and protects the foam strip 12 from the concrete. the effect of wall pressure on the wall 4, since the lateral surfaces 8 and the surface 9 of the foam strip 12, which is parallel to the seam, are covered by a transverse sheet of metal 1. The area of the transverse 1 enclosing the foam strip 12 may have openings 5 made in one or all three walls.

During the installation of the seam allowance, it is inserted into the area covered by the concrete wall. The seam allowance of the seam is rested on the concrete slab on which the wall is rested and concreted, whereby the transverse 1 of the seam is vertical to the lateral surfaces of the concreted wall 4. Once the concrete wall has been cast, the sealing material is injected into the sealing channel 12 of the foam strips and completely fills the seam formed during the casting. If the top of the injection passage 2 is covered by another section 11, the sealing material is injected through an externally drilled passage 10 (FIG. 9). If the top of the foam strip 12 is open, the sealing material may be injected by pressing through a top injection tube inserted.

δ

As shown in Figures 5 and 6, not only the transverse joint 1 and the foam web 12, but also the swelling web 6, may have a shrink seam web. The swelling web 6 may be provided on one or both sides of the web 1 or at the longitudinal lateral edge over the entire length of the crossbar 1. If the swelling strip 6 reliably seals the seam 7, the sealant is not even sprayed. However, if the seam is not sealed, the sealant is injected at any time through the drilled channel 10 into the duct 2 and the seam sealed. The use of swelling strips is not risky as the seam can be restored at any time. This allows the use of ultra-thin swelling strips, which usually reliably seal the seam. This reduces the cost of swelling strips, which are significantly more expensive than foam strips, and their use in combination with foam strips provides good economic effect and reliably seals the seam.

The above-described embodiments of both a single foam strip 12 and a foam strip in relation to the swelling strips 6 or openings 5 may be compatible with other variations of the injection channel 2 formation.

Figures 7 and 8 show another embodiment of the seam allowance. The cross-member 1 of the seam allowance has a hollow injection channel 2 which is enclosed by walls 16, 17, 18 and 19. The sealing material penetrates through the openings 5. The hollow injection channel 2 may be filled with either a foam strip 12 or openings 5 which may be prevented from being blocked by a cast concrete wool, foam material or the like which is permeable to the sealing material. The openings 5 can also be made on the lateral surfaces of the injection channel 2, their installation and size depending on the type of sealing material and the concrete used. Because the openings 5 are made on both sides of the seam crossbar 1, the seam is sealed.

Instead of the foam tape, a conventional injection tube may be used to form the injection channel. If the conventional injection pipe has a circular cross-section, then two such injection pipes are provided on either side of the cross-member or the openings 5 are made elongated. Such openings facilitate the passage of sealing material.

Figures 10 and 11 show that the injection tube 13 consists of a tubular portion 14 and a ribbed base 15 which is secured to the crossbar 1 of the seam and covers the openings 5. The base 15 has openings for sealing material. This is new compared to known injection pipes, where the base 15 is only a locking member. Such an arrangement ensures that, when injected into the injection pipe 13, the sealing material penetrates through the pipe 13 into the concrete and through the strip base 15 made of the same material as the pipe portion 14 and through openings 5 to the opposite side of the seal all defective areas.

Fig. 12 is a cross-sectional view of another embodiment of a seam allowance.

The transverse 1 of this seam allowance is a symmetrical element with respect to the transverse central axis 20. The device for forming the injection duct is located in the center of the seam crossbar 1. It consists of three areas: a central hollow channel 2a and two areas 2b with foam strips 12. The hollow channel 2a has a rectangular cross-section and is bounded by two side walls 21 and roof and floor walls 22, 23. The side walls 21 are spaced apart , this distance corresponds to the thickness of the transverse sheet 1 of the cross-section. The roof and floor walls 22, 23 extend further on both sides of the side walls 21, all three forming open grooves for the foam strips. The openings 5 are made in both side walls 21 so that the hollow channel 2a contacts the foam strips 12. The openings 5 can be arranged in the side walls 21 in a certain sequence, so that only one opening 5 is made in the cross-section shown in FIG. .

The cross member 1 of the seam has stiffening edges 24 which reinforce the seam seam. These stiffeners are perpendicular to the faces 1c of the joint 1 and extend over the entire length of the cross member 1.

Rigidity edges are also an obstacle in the waterway through the seam seam, so they not only provide rigidity to the crossbar 1, but also improve the tightness of the seam.

Claims (20)

DEFINITION OF INVENTION A shrink joint seam set in a cast concrete wall for sealing a seam between two sections of a wall, comprising a strip transverse (1) with an injection channel (2) extending over the entire length of the transverse transverse part (1). 1) in the area of contact with the injection channel (2), openings (5) are provided for penetrating the injected sealing material through the cross-member (1) of the seam. 2. The mouthpiece according to claim 1, characterized in that on both sides of the mouthpiece (1) the element forming the injection channel (2) is arranged along the entire length of the mouthpiece (1). 3. The mouthpiece according to claim 1 or 2, characterized in that the mouthpiece bar (1) is made of a thin-walled plastic material. 4. A compound according to claim 1 or 2, characterized in that the cross section (1) of the compound is made of galvanized sheet metal. 5. The mouthpiece according to one of claims 1 to 4, characterized in that it has a swelling strip (6) arranged in the mouthpiece (1) parallel to the element forming a single injection channel (2). 6. The caliper according to claim 5, characterized in that the swelling strip (6) is arranged at the lateral longitudinal edge of the caliper transom (1). 7. The pad according to claim 5 or 6, characterized in that the swelling strip (6) is arranged adjacent to the element forming a single injection channel (2). 8. The swab according to one or more of Claims 1 to 5, characterized in that the swelling strip (6) is arranged on both sides of the swab (1). 9. The assembly according to one or more of Claims 1 to 8, characterized in that the element forming one injection channel (2) and the assembly (1) and / or the swelling strip (6) and the assembly (1) are bonded. Composition according to one or more of Claims 1 to 9, characterized in that the element forming the injection channel (2) is a porous foam strip (12) made of a rigid material. 11. The seam according to claim 10, characterized in that the surface of the seam cross member (1) has a profile socket for the foam strip (12). 12. The seam according to claim 11, characterized in that the foam strip (12) is surrounded on three longitudinal sides by a profile socket of the seam transverse (1). 13. A joint according to one or more of claims 1 to 9, characterized in that the element forming the injection channel (2) is a continuous hollow channel (2a) formed in the cross section (1) of the joint. 14. The patch according to claim 13, characterized in that the hollow channel (2a) is laterally covered by a respective foam strip (12), whereby the hollow channel (2a) contacts the foam strip (12). 15. An assembly according to one or more of claims 1 to 9, characterized in that the element forming the injection channel (2) is an injection tube (13). 16. The seam according to claims 1 and 15, characterized in that the injection tube (13) comprises a tubular part (14) and a ribbed base (15) covering the openings (5) of the seam cross-member (1). 17. A joint according to one or more of claims 1 to 15, characterized in that the cross member (1) of the joint is made of a thin-walled rigid material. 18. The mouthpiece according to one or more of claims 1 to 17, characterized in that the element forming the injection channel (2) is arranged transversely to the center of the mouth (1). 19. A joint according to one or more of Claims 1 to 18, characterized in that it is embedded in a cast concrete wall along the entire height of the wall and the sealing material is injected into the formed injection channel (2). 20. The savings according to claim 19, characterized in that the injection channel is drilled externally to inject the sealing material.