FI97905C - Injection hose for sealing structures and corresponding joints - Google Patents

Description

97905

Injection hose for sealing structures and similar joints Injection hose for sealing structures and corresponding joints 5

The invention relates to an injection hose for sealing structures and corresponding seams, which injection hose is intended to be permanently mounted on the object to be sealed and through which the injection medium for sealing the inter-seam joint is traced for feeding substantially the entire length of the injection hose.

One problem in construction has been how to reliably seal the joint between the base plate of the structure and the wall or wall elements. There have been many attempts to solve this problem in the past. One solution for obtaining a tight seam 15 has been to use a separate, so-called a watertight seal made of either plastic or sheet metal. However, even if such a seal is used to hold the seam, this solution does not seal the seam over the entire thickness of the structure. The tightness of the joints has also been improved in the past by having the joint partially drilled open and then 20 polyurethane has been injected into the joint.

As the above-mentioned solutions have not sufficiently met the requirements for construction, some time ago a new method was developed to solve the problem, which utilizes the so-called an injection hose which is left in the seam during construction and through which the sealant required for the seam is injected. Such solutions have been presented e.g. in Finnish patent applications Nos. 910698, 914141, 923345 and 923163 and in German application publication No. 4340845.

FI application 923163 discloses a multi-piece injection hose, which first comprises a body in which a plurality of outlets for injection fluid are formed. Sealing pieces are arranged on top of these outlets and the entire structure is surrounded by a filter cloth or the like. In the solution according to this publication 2 97905, the outlet openings of the injection liquid open from the internal overpressure of the hose and correspondingly close from the internal negative pressure. The operation of the hose can therefore be considered quite good, but the disadvantage of the solution is that due to its structure, the hose in question is quite expensive.

FI application 914141 describes an injection hose comprising an inner layer and a surrounding outer coating layer in which through-openings for the injection liquid are formed.

FI application 923345 discloses an injection hose comprising a base body of a hose with a helical diffuse profile in which outlets for an injection liquid are formed. The base frame is surrounded by a protective film.

FI application 910698 describes an injection method in which a solid-walled injection pipe left in a casting is used for injection, into which injection material is fed and the internal pressure of the injection pipe is raised above the release pressure of the pipe, whereby the injection material enters the casting.

DE-A-4340845 discloses an injection hose in the form of a profile, which comprises an opening formed in the profile through which the injection liquid can be discharged during injection into the casting. The profile is further provided with a closure member which closes the opening in question when the injection is not carried out, preventing the hose from clogging. The disadvantage of these last two solutions is that since the hose remains inside the casting during the casting stage, it basically becomes tightly surrounded by the concrete. 25 In this case, for example, in the solution according to FI application 910698, the tripping of the pipe is not at all certain, because the pipe cannot expand despite the internal pressure. In principle, this is also the case in DE 4340845, because in the casting stage the closure member in the profile is tightly pressed against the opening in the profile, whereby the injection fluid from the profile to the seam would require a substantial deformation of the profile structure.

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In addition, an injection hose is known which comprises a torn plastic hose or a steel spiral acting as the body of the injection hose and surrounded by a filter cloth. The filter cloth prevents concrete from clogging the hose, but allows injection fluid to pass through to seal the joint.

FI Patent No. 94157 discloses an injection hose with a three-layer structure, comprising a helical hose forming an inner layer, e.g. a plastic or rubber hose, an intermediate layer arranged on the inner layer and forming a sealing layer, and a top layer 10 consisting of a web-like fabric and holding the structure together. From a functional point of view, this solution is very good, but one of the weaknesses in terms of manufacturability is that the hose in question consists of three separate and interconnected parts.

It is an object of the present invention to provide a novel and improved injection hose for sealing joints in structures. In order to achieve the object of the invention, the injection hose according to the invention is mainly characterized in that the injection hose consists of a uniform profile comprising an inner tube simultaneously connected .

The invention brings advantages over prior art solutions, and among these advantages can be mentioned e.g. following. The injection hose according to the invention is made in one piece from a profile, thanks to which modern and automated manufacturing techniques can be used in the manufacture. The structure of the hose is therefore very simple and, as a result, the manufacturing cost of the hose is low. Due to its construction, the hose according to the invention is furthermore very reliable in that it does not have similar disadvantages as e.g. Due to its design, the hose can be used several times for post-sealing if such a need arises. Other advantages and features of the invention will become apparent from the following detailed description of the invention.

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In the following, the invention will be explained by way of example with reference to Figures 5 of the accompanying drawing.

Figure 1 shows a schematic sectional view of the arrangement of the injection hose in the structures.

Figure 2 shows a more detailed cross-sectional view of an injection hose 10 according to the invention.

Figure 3 schematically shows the arrangement of the movement joint tape between the two components.

Fig. 4 schematically shows a sectional view of a movement joint strip in which an injection hose structure according to the invention is integrated.

Figure 4A shows a variation of the structure of Figure 4.

Referring to the figures of the drawing and as already apparent from the previous description, an injection hose according to the invention is used to seal the joints of structures so that, for example when erecting a structure after casting a base plate, an injection hose according to the invention is placed on the base plate where the wall is intended to be cast or to be fitted and then the wall is cast or the wall element is installed in such a way that the injection hose remains permanently in the joint between the base plate and the wall / wall element.

This is illustrated in particular by means of Fig. 1, in which the injection hose 10 is arranged in the seam between the base plate 1 and the wall to be cast 2 or the wall element, respectively. In addition to horizontal seams, the injection hose 10 30 according to the invention can also be used for sealing vertical seams.

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Figure 2 is a schematic sectional view of the structure of the injection hose 10 according to the invention. According to Fig. 2, the injection hose 10 consists of a uniform profile made of, for example, plastic, such as PVC or thermoplastic, rubber or some other suitable material. The injection hose 10 comprises 5 inner tubes 11, to which a main layer integrally connected by a base 12 consists of hetero-inlets 13, 14, which, as shown in Figure 2, overlap in such a way that the top layer forms an outer tube protecting the inner tube 11. An essentially important feature of the injection hose 10 according to the invention is that an empty cavity 15,16 is left between the inner tube 11 and the "outer tube", i.e. the hetulates 13,14. The significance of this cavity 10 15,16 is apparent from the following description.

The sealing of the joint is performed by feeding a sealing agent for sealing the joint, such as injection resin, microcement or the like, into the inner tube 11 of the injection hose 10 until the inner tube 11 is filled with the injection material along its entire length. The injection hose 10 is then closed at one end and the injection medium is fed to the injection hose 10 at such a pressure that the inner tube 11 breaks. The inner tube 11 may be weakened so that rupture already occurs at a relatively low injection pressure. When the inner tube 11 breaks, the grout can unobstructedly discharge into the empty cavity 20 15,16 between the inner tube 11 and the hetulates 13, 14, and the concrete shell formed on the injection hose 10 does not form any obstacle to unloading. The casting pressure of the concrete never completely closes the cavity 15,16, but due to the higher casting pressure, the holes 13,14 merely overlap. Thus, when the inner tube 11 is broken by the injection pressure, the injection medium is allowed to discharge into the cavity 15,16. The injection agent is further discharged from the cavity 15,16 between the gap opening between the hetulates 13,14 and further into the seal to be sealed.

The cavity space 15,16 delimited by the holes 13,14 thus acts as a discharge channel for the injection medium in the longitudinal direction of the injection hose 10, whereby the injection medium can fill the hollow 15,16 along the entire length of the injection hose 10, regardless of the breaking point of the inner tube 11. As a result, further, even if concrete can penetrate into the cavity 15,16 delimited by the hetulates 13,14 6 97905, which would form a blockage in the cavity 15,16, the inner tube 11 may burst on either side of the blocked area, allowing the grout to continue to discharge and go to seal. to.

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If the seal to be sealed has large slits or openings through which the grouting material passes too easily, the grouting hose 10 can be emptied by suction. When the injection hose 10 is emptied by suction, i.e. under reduced pressure, the holes 13,14 overlap and seal against each other, thus preventing the injectable substance already injected into the structures from returning to the hose 10. Emptying the injection hose 10 is important because the injecting material does not harden inside the injection hose 10. Once the grout that has already entered the structures has hardened, the sealing operations can be repeated as already described above.

The injection hose 10 according to the invention is suitable for use with all known injection agents. Thus, all known injection resins can be injected with the injection hose 10 according to the invention. It can also be used for the injection of microcement and further for the injection of coarser cement.

Figures 3-4A show embodiments of the invention for utilizing the invention in connection with a movement joint tape. Figure 3 shows completely diagrammatically the arrangement of the movement-leveling strip 20 between the two structural elements 3,4. The installation of the movement joint strip 20 is generally quite a laborious and difficult task for concrete structures. Because of this, it is also prone to errors. Most often, installation and concreting errors are at the base of the 25 movement joint strips. The reasons for this are e.g. the fact that the casting is difficult to perform, the fitting of the movement joint tape is difficult due to the reinforcement, etc. Therefore, in many cases, the movement joint tape has to be ensured by injecting an injection agent at the root of the movement joint tape. Until now, conventional separate injection hoses have been used for this purpose.

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In the present invention, the securing of the movement joint strip is solved in such a way that the structure of the injection hose according to the invention is integrated in the movement joint strip 20 itself and this is schematically illustrated by means of Figures 4 and 4A. In the solution of Fig. 4%, the inner tube 21 of the injection hose is formed with a movement joint strip 20 of a uniform material and the inner tube 21 is further protected by a uniform material to form and surround the inner tube 21. The operation of the ice system is exactly similar to that described in Fig. 2. In Fig. 4A, the solution of Fig. 4 has been modified so that a separate tube 25 is used as the inner tube, which is arranged in a manner similar to Fig. 4 to be protected by the hetulas 22. Thus, in the solution 10 according to the invention, the injection hose structure is always in a position relative to the movement seam strip 20 from which the injection medium can easily penetrate the critical area.

The invention has been described above by way of example with reference to the figures of the accompanying drawing. However, the invention is not limited to the example shown in the figures, but the various embodiments of the invention may vary within the scope of the inventive idea defined in the appended claims.

Claims (7)

An injection tube for sealing structures and corresponding joints, which injection tube (10) is intended to be mounted to the object to be sealed to remain there and wherein the injection agent intended to seal the object to be sealed, such as a joint between structures, is arranged to be measured via the injection tube (10) substantially over the entire length of the injection tube (10), characterized in that the injection tube (10) consists of a uniform profile comprising an inner tube (11) to which a wrapper of flaps (13, 14) of the same material in such a way that the flaps (13, 14) partially overlap by forming an outer tube which protects the inner tube (11), leaving an empty heel space (15). , 16) between the inner tube (11) and the flaps (13,14). Injection hose according to claim 1, characterized in that the inner tube 15 (11) is arranged to tear through the action of the injection pressure, thereby allowing the injection substance to flow out to the cavity (15,16), from where the injection substance is further arranged to be transferred. the place between the tabs (13,14) of the object to be sealed. Injection tube according to claim 1 or 2, characterized in that the heel space (15,16) which is limited by the flaps (13,14) forms an outflow channel for the injection substance, through which the injection agent will eat in the longitudinal direction of the injection tube (10) substantially over the entire length of the injection tube (10). Injection hose according to any of claims 1-3, characterized in that the wall of the inner tube (11) is provided with attenuations to reduce the required fragmentation piece. 5. Injection hose according to any of claims 1-4, characterized in that the injection hose (10) can be emptied by means of a negative pressure in such a way that the flaps (13, 14) are arranged to repress in a sealed manner against each other 97905 by the action of the vacuum to prevent concrete from entering the injection tube (10). Injection hose according to any of the preceding claims, characterized in that the injection hose (10) is formed in a single part with the sealing band (20) and is of the same material as the relevant sealing band (20). Injection hose according to claim 6, characterized in that several injection hose structures are integrated in the movement joint band (20) of the same material as the movement joint belt.