Waterproofing spline for concrete structures

Abstract

Waterproofing spline for concrete structures is designed as profiled strip made of elastic material and includes a deformation zone and sealing zones. Deformation zone is located in the middle of profiled strip and is designed as shell with closed cavity, and sealing zones are located symmetrically on opposite sides relative to deformation zone and feature transverse ribs, wherein sealing zones are designed as ridges that taper along their length from the deformation zone, each of which contains open cavity for securing profiled strip to reinforcing bars of concrete structure, and transverse ribs are located at the ends of ridges and are equipped with fastening elements.

Description

Waterproofing dowel for concrete structures belongs to the sealing products technological and expansion joints in concrete structures, mainly for formwork dowels, which used for internal laying when arranging foundations, walls, slabs floors, buried objects, as well as in the manufacture and installation of these structures of various appointment. When manufacturing and installing structures made of monolithic reinforced concrete, for example, foundations slabs and underground walls, technological joints are formed, which is caused by interruptions during concreting horizontally and vertically oriented structures. Such seams, especially if they are located below ground level, require internal waterproofing using waterproofing dowels in the form of a membrane barrier or partition. In recent years, the largest Profiled partitions made of polymeric materials have become widespread, which have a higher durability and technological qualities when installing concrete structures compared to dowels membrane barrier. Known waterproofing dowel for concrete structures (international application No. WO2007006743A1, MPK E04B 1 / 68, publication date 18.01.2007), which is made in the form of a profiled strip of elastic material and contains a sealing zone consisting of a flat web with transverse ribs and fixing elements located on one side of the flat sheet at a certain distance from each other one. The transverse ribs and fixing elements can be arranged in sections or continuously along the flat web. The transverse ribs are T-shaped and are designed for reliable and tight fixation of the profiled strip to the surface of the concrete structure being erected. Fixing The elements are made of a smaller height and are located between the ribs with the formation of open spaces between them. cavities for fastening flexible drainage pipes. When manufacturing concrete structures, sections profiled profile are connected to each other using the specified pipes and laid flat surface onto the formwork or hardened concrete layer so that its central part was on the line of rupture between the concrete blocks. After that, a layer of concrete is poured. In this case, the ribs and fixing elements with drainage pipes are embedded in the adjacent layer of concrete. structures, and the flat sheet forms waterproofing between them. The disadvantage of the known waterproofing dowel is its low technological and operational reliability, which due to: - displacement from the design position and / or deformation of the flat web as a result of force the impact of concrete flow during pouring due to the lack of fixtures for rigid fastening profiled strip relative to formwork or reinforcement; - damage to the flat sheet as a result of displacement or temperature deformations adjacent concrete layers during operation due to the lack of a compensating deformation zone in profiled strip construction. Known waterproofing dowel for concrete structures (patent no. FR2220637A1, IPC: E02B3 16 / 16, E04B 1 / 68, E04B 1 / 684, publication date 04.10.1974), which is made in the form of a profiled strip made of elastic material and contains a deformation zone and a sealing zone. The deformation zone is located in the middle part of the profiled strip and is made in the form of a shell with a closed cavity. Zones seals are located symmetrically on opposite sides relative to the deformation zone and are made in in the form of strips with transverse ribs. The shell is reinforced with a longitudinal vertical rib, placed on the side of the ribs on the strips. When manufacturing concrete structures, the section of the profiled The strips are first connected to each other using elastic drainage tubes that are inserted into end parts of the closed cavity and fixed with quick-release adhesive or by surface bonding melting of the sleeve material under the influence of heat. After that, the strips with transverse locking ribs are fastened to each other using staples that are installed at opposite ends of the strips. The staples, in turn, are fixed to the reinforcement bars of the concrete structure. During concreting of the first masonry, one strip is placed inside the formwork, and the second is bent at 90° relative to the inner surface of the formwork. After the first concrete block has hardened and the formwork has been removed, the second strip released by lifting it into the continuation of the first strip embedded in the concrete block, after which it is concreted the second block of the concrete structure. During the pouring of the concrete, the fixing ribs are embedded in the adjacent layers of the concrete structure, and the strips form a waterproofing between them. The specified waterproofing the key has higher operational reliability due to the presence of a deformation zone, which compensates for temperature deformations of the layers of the concrete structure, as well as by fixing position on the reinforcement of the building structure. The disadvantages of the known waterproofing dowel are: - low manufacturability during installation due to the need for additional operations for connection sections together using drainage tubes and brackets; - low operational reliability of waterproofing due to the high probability of rupture profiled tape in the transition areas from the rigid deformation zone, reinforced with longitudinal vertical rib and internal drainage tubes, to flat thin sealing zones in as a result of temperature and other deformation effects in technological seams; - limited scope of use due to the need to connect drainage tubes using glue, which does not allow for installation of a waterproofing keyway when sub-zero ambient temperatures. The utility model is based on the task of improving the manufacturability of the waterproofing wedge. during installation and operational reliability of waterproofing of concrete structures due to its other constructive implementation. The technical result of the implementation of the task is to reduce the complexity of installation waterproofing dowel due to the possibility of its attachment directly to the reinforcement bars and increasing the operational reliability of waterproofing of concrete structures by implementing zones sealing and their connection points with the deformation zone. This ensures the expansion of the area the use of a waterproofing dowel due to its use in various climatic conditions, including including at low temperatures. The task is solved by the fact that in a waterproofing wedge for concrete structures, which made in the form of a profiled strip of elastic material and contains a deformation zone and a zone sealing, with the deformation zone located in the middle part of the profiled strip and is made in the form of a shell with a closed cavity, and the sealing zones are located symmetrically with opposite sides relative to the deformation zone and are made with transverse ribs, according to the useful model, the sealing zones are made in the form of ridges that narrow along their length from the zone deformations, each of which contains an open cavity for fastening the profiled strip to the bars reinforcement of the concrete structure, and the transverse ribs are located at the ends of the ridges and are made of fixing elements. In this case, it is advisable to use rubber or polymeric materials as the elastic material. elastic properties. The set of essential distinguishing features of the claimed waterproofing dowel for concrete structures allows to ensure the technical result. In particular, the implementation of sealing zones in the form of profiled ridges, which taper along their length from the deformation zone, allow for smooth transition between the deformation and sealing zones, and thereby ensure increased strength of the key profile to force effects resulting from displacement or temperature deformations of the layers concrete during operation, to eliminate deformation of sealing zones as a result of the force effect of the flow concrete during pouring and ensure the formation of open cavities in the body of the sealing zone. Execution in in the sealing zones of open cavities allows for reliable fastening of the key profile directly on the reinforcement bars without the use of additional technical means, which is significantly reduces the complexity of its installation during concrete work. The execution of transverse ribs from fixing elements and their location at the ends of the profiled ridges allows to ensure reliable fastening in adjacent layers of concrete and, accordingly, high reliability of waterproofing of concrete structures. In addition, fastening the waterproofing dowel directly to the reinforcement bars allows installation work to be carried out at sub-zero ambient temperatures. The design of a waterproofing dowel for concrete structures is explained drawings, where Fig. 1 shows a general view of the waterproofing key; Fig. 2 shows a transverse cross-section of a waterproofing key; Fig. 3 - diagram of the installation of a waterproofing key in a concrete structures (example 1); Fig. 4 shows a diagram of the installation of a waterproofing key in a concrete structure with using wire twists (example 2). The waterproofing wedge for concrete structures is made in the form of a profiled strip of elastic material, which contains a deformation zone 1 located in the middle part of the profile strip, and two sealing zones 2 and 3, located on its opposite sides (Fig. 1, 2). Deformation zone 1 is made with a closed cavity 4, and the sealing zones 2 and 3 are made in the form of profiled ridges that taper along their length from deformation zone 1. At the ends of profiled ridges transverse ribs 5 and 6 with fixing elements and vertical rib 7 are made. In the considered In the example, the transverse ribs 5 and 6 are made wedge-shaped and are arranged mirror-imagely relative to each other. one on opposite sides of the ridge, and a vertical rib 7, which is made with a spherical thickening at the top. In each of the sealing zones 2 and 3, open cavities 8 and 9 are made for fastening on reinforcement bars. The waterproofing wedge is made of an elastic material, such as rubber or polymers. materials with elastic qualities. Dimensions of the waterproofing wedge and the distance between the transverse the axes of open cavities 8 and 9 are chosen taking into account the design dimensions of concrete structures, operating conditions and the distance between the axes of the reinforcement bars. For typical building structures, it is advisable to use waterproofing dowels with a height of from 12 to 70 cm and more. The diameter of the open cavities 8 and 9 in the body of the sealing zones 2 and 3 can be from 5.0 to 35 mm. The waterproofing key is manufactured using known methods for rubber products and elastic polymeric materials, for example by extrusion, roll forming or pressing. The use of a waterproofing dowel is carried out as follows. Example 1. Installation of the waterproofing key is carried out after preparation of the formwork with reinforcement for pouring concrete. The waterproofing wedge is installed horizontally at the junction oriented monolithic reinforced concrete structure 10 and vertically oriented monolithic reinforced concrete structure 11 symmetrically relative to the axes of the concreting expansion and contraction joint 12 (Fig. 3). Fixing the waterproofing dowel in this area is carried out by installing bars reinforcement 13 and 14 into open cavities 8 and 9. If necessary, at the construction site, butt welding of assembled profile sections together with a heated tool. Technological The welding process consists of heating (melting) the surfaces to be welded to a viscous state. polymer when they are in direct contact with a heated tool and then connected under After installing the waterproofing key, concreting of structures 10 and 11 is carried out with forming a technological seam 12 of concreting. Example 2. Installation of the waterproofing dowel is carried out similarly to example 1 above. However, after fixing the waterproofing key by inserting reinforcement bars 13 and 14 into the open cavities 8 and 9 are additionally secured with twists of soft carbon wire 15. For this, the walls Open cavities 8 and 9 are pierced with pieces of wire 15 and their ends are twisted (Fig. 4). Additional Fixing with wire 15 is advisable to use, for example, when performing concrete work in the winter period, when as a result of sub-zero temperatures the elasticity of the profiled strip This additional fixing is also advisable, for example, in case of size discrepancies open cavities 8 and 9 of the diameters of the reinforcement bars 13 and 14. The use of the proposed waterproofing dowel ensures high technological reliability. waterproofing of the technological seam 12 of concreting, which is achieved by: - the shape of the profile cross-section is made of elastic material, which allows it to be securely fix on the reinforcement bars and simultaneously waterproof the technological seam in the process pouring two layers of concrete structure; - simple connection of the profile to the reinforcement bars before pouring concrete; - high structural rigidity of the strip made of elastic material, which ensures the preservation design position of the key both during concrete pouring and during operation under temperature and other deformations of concrete structures. Thus, the proposed waterproofing wedge is simple in design, technologically advanced in installation and reliable in operation. Test results in real operating conditions confirmed a significant increase in the reliability of waterproofing technological joints in construction structures and significantly increase their service life between repairs.

Claims

1. Waterproofing wedge for concrete structures, made in the form of a profiled strips of elastic material and contains a deformation zone and a sealing zone, while the zone deformation is located in the middle part of the profiled strip and is made in the form of shells with a closed cavity, and the sealing zones are located symmetrically with opposite sides relative to the deformation zone and are made with transverse ribs, which differs in that the sealing zones are made in the form of ridges that narrow along their length from the deformation zone, each of which contains an open cavity for fastening profiled strips on the reinforcing bars of the concrete structure, and the transverse ribs located at the ends of the ridges and equipped with fixing elements.

2. Waterproofing wedge according to claim 1, characterized in that as an elastic material rubber or polymer materials with elastic properties are used.

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