Formwork-free leaking stoppage structure for large gap between prestressed concrete steel pipe truss laminated slabs
By using trapezoidal plugging rubber strips and tape combined with expansion foam glue between prestressed concrete steel pipe truss laminated plates, the problem of difficulty in sealing gaps is solved, and effective sealing of concrete and improving the quality of structure is achieved.
Patent Information
- Application Number
- CN202420286070.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-06
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-02-06
AI Technical Summary
In prefabricated structures, the gaps between the superimposed concrete steel pipe truss plates are difficult to effectively seal, resulting in concrete leakage and structural quality degradation, affecting the finished product quality and service life of the final floor slab.
A single-line arrangement of prestressed concrete steel pipe truss laminated plate, the gap width is less than 10mm and expanded foam glue is used, and the width is greater than or equal to 10mm and is connected by trapezoidal plug rubber strips and tape, combined with EVA sponge tape and anti-aging and corrosion-resistant medium hardness ladder The rubber strips are plugged in and the vertical pressure generated after concrete pouring increases friction to block the gap.
It effectively avoids concrete leakage, ensures the protection of structural steel bars, improves the finished product quality and service life of the floor slabs, and ensures firm sealing of gaps between the slabs.
Smart Images
Figure CN222332985U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of floor slab construction, in particular to a large gap formwork-free leakage plugging structure between prestressed concrete steel pipe truss superimposed plates. Background Art
[0002] In the production process of prefabricated structures (i.e. prestressed concrete steel tube truss composite slabs), the whole span of the floor slab is often divided into multiple prestressed concrete steel tube truss composite slabs for processing and manufacturing. During the hoisting operation, if the prestressed concrete steel tube truss composite slabs are arranged closely in sequence, a through seam will be formed along the edge of the beam after the last prestressed concrete steel tube truss composite slab is cast; if the prestressed concrete steel tube truss composite slabs are not arranged closely, there will inevitably be a wider gap among the multiple seams between the multiple prestressed concrete steel tube truss composite slabs. In this case, it is difficult to ensure that the concrete does not leak by injecting ordinary foam glue, and it may even cause leakage of concrete aggregates and form cavities. At the same time, the protective effect of concrete on structural steel bars (especially at the junction of beams and slabs) is also affected, affecting the quality and service life of the final floor slab structure.
[0003] In order to better control the quality of prefabricated engineering structures, it is necessary to deal with such quality defects, so an innovation was made to invent a formwork-free plugging structure for large gaps between prestressed concrete steel tube truss composite plates. Utility Model Content
[0004] In order to better control the structural quality of prestressed concrete steel tube truss composite slab projects and avoid the formation of through-holes and internal cavities between the composite slabs, which would affect the quality and service life of the final floor structure, the utility model provides a formwork-free plugging structure for large gaps between prestressed concrete steel tube truss composite slabs.
[0005] The technical scheme of the large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates of the utility model is as follows:
[0006] A large gap between prestressed concrete steel tube truss composite plates without formwork plugging structure, comprising a plurality of prestressed concrete steel tube truss composite plates, wherein the plurality of prestressed concrete steel tube truss composite plates are arranged in a straight line, and there are gaps between adjacent prestressed concrete steel tube truss composite plates, and the gaps between adjacent prestressed concrete steel tube truss composite plates with a gap width less than 10 mm are sealed with expanded foam, and the gaps between adjacent prestressed concrete steel tube truss composite plates with a gap width greater than or equal to 10 mm are sealed with trapezoidal plugging rubber strips, and the trapezoidal plugging rubber strips are connected to adjacent prestressed concrete steel tube truss composite plates on both sides. The prestressed concrete steel tube truss composite plates are connected by tape, and the side of the prestressed concrete steel tube truss composite plates has a convex surface, which includes an upper inclined surface and a lower inclined surface. The upper inclined surface is arranged above the lower inclined surface, and the connecting part between the upper inclined surface and the lower inclined surface is close to the bottom of the prestressed concrete steel tube truss composite plates. The tape is laid on the upper inclined surface, and the trapezoidal plugging rubber strip is arranged between adjacent prestressed concrete steel tube truss composite plates in a manner of larger upper and smaller lower. Concrete is poured between adjacent prestressed concrete steel tube truss composite plates to form a floor slab.
[0007] Furthermore, in the above-mentioned large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates, the tape is laid on the lower part of the upper slope to ensure that the composite plate steel bars are in full contact with the cast-in-place concrete and are cast as one piece.
[0008] Furthermore, in the above-mentioned large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates, the tape is EVA sponge tape.
[0009] Furthermore, in the above-mentioned large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates, truss steel bars are provided on the prestressed concrete steel tube truss composite plates, and the truss steel bars are in a regular zigzag shape with sharp corners on both sides. The sharp corner of the truss steel bars on one side is prefabricated inside the prestressed concrete steel tube truss composite plate, and the sharp corner of the truss steel bars on the other side is located outside the prestressed concrete steel tube truss composite plate, and the corresponding sharp corners of adjacent truss steel bars located outside the prestressed concrete steel tube truss composite plate are connected by welded steel pipes.
[0010] Furthermore, in the above-mentioned large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates, the precast beam includes a rectangular steel bar frame and a bottom concrete block, the lower part of the rectangular steel bar frame is pre-cast in the bottom concrete block, and the horizontal steel bars of the prestressed concrete steel tube truss composite plate located on the outside extend into the corresponding rectangular steel bar frame of the precast beam by at least 10 mm.
[0011] The utility model provides a large gap between prestressed concrete steel tube truss composite plates without formwork plugging structure, comprising a plurality of prestressed concrete steel tube truss composite plates, wherein the plurality of prestressed concrete steel tube truss composite plates are arranged in a straight line, and there are gaps between adjacent prestressed concrete steel tube truss composite plates, and the gaps are sealed with expanding foam glue between adjacent prestressed concrete steel tube truss composite plates with a gap width less than 10 mm, and the gaps are sealed with trapezoidal leak-proof rubber strips between adjacent prestressed concrete steel tube truss composite plates with a gap width greater than or equal to 10 mm, and the trapezoidal leak-proof rubber strips are connected to the two Adjacent prestressed concrete steel tube truss composite plates are connected by tape, and the side surface of the prestressed concrete steel tube truss composite plate has a convex surface, which includes an upper inclined surface and a lower inclined surface. The upper inclined surface is arranged above the lower inclined surface, and the connecting part between the upper inclined surface and the lower inclined surface is close to the bottom of the prestressed concrete steel tube truss composite plate. The tape is laid on the upper inclined surface, and the trapezoidal sealing rubber strip is arranged between adjacent prestressed concrete steel tube truss composite plates in a manner of larger upper and smaller lower. Concrete is poured between adjacent prestressed concrete steel tube truss composite plates to form a floor slab. It is mainly composed of anti-aging and corrosion-resistant medium-hardness trapezoidal leak-proof rubber strips and tapes; the rubber strips and the joint surfaces of the precast panels are supplemented with adhesive tapes on both sides. The vertical downward pressure after concrete pouring is converted into a perpendicular pressure between the rubber strips and the overlapping panels to increase the friction between the two, and firmly plug the large gaps between the panels, thereby avoiding the situation where the gaps between adjacent prestressed concrete steel tube truss overlapping panels are wide. It is difficult to ensure that the concrete does not leak when injected with ordinary foam glue, and it may even cause leakage of concrete aggregate and form cavities. At the same time, the protective effect of concrete on structural steel bars is also affected, affecting the quality and service life of the final floor structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The utility model is a structural schematic diagram of a large gap formwork-free leakage plugging structure between prestressed concrete steel tube truss composite plates.
[0013] Figure 2 yes Figure 1 Enlarged view of part A.
[0014] Figure 3 It is a schematic diagram of the assembly of precast beams and prestressed concrete steel tube truss composite slabs on both sides.
[0015] In the figure: 1-prestressed concrete steel tube truss composite plate, 2-trapezoidal leak-proof rubber strip, 3-adhesive tape, 4-upper slope, 5-lower slope, 6-truss steel bar, 7-rectangular steel bar frame, 8-bottom concrete block, 9-beam side form, 10-cast-in-place beam and slab concrete, 11-horizontal steel bar, 12-steel pipe, 13-cast-in-place part of floor slab. DETAILED DESCRIPTION
[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the utility model will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.
[0017] Embodiment 1:
[0018] refer to Figures 1 to 3 The technical solution of a large gap-free formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates in this embodiment is as follows:
[0019] A large gap between prestressed concrete steel tube truss composite plates without formwork plugging structure, comprising a plurality of prestressed concrete steel tube truss composite plates 1, wherein the plurality of prestressed concrete steel tube truss composite plates 1 are arranged in a straight line, and there are gaps between adjacent prestressed concrete steel tube truss composite plates 1, and expansion foam (not shown) is used to plug the gaps between adjacent prestressed concrete steel tube truss composite plates 1 with a gap width less than 10 mm, and trapezoidal plugging rubber strips 2 are used to seal the gaps between adjacent prestressed concrete steel tube truss composite plates 1 with a gap width greater than or equal to 10 mm, and the trapezoidal plugging rubber strips 2 are connected to the adjacent prestressed concrete steel tube truss composite plates on both sides. The prestressed concrete steel tube truss composite plates 1 are connected by a tape 3, and the side of the prestressed concrete steel tube truss composite plates 1 has an outward convex surface, and the outward convex surface includes an upper inclined surface 4 and a lower inclined surface 5, and the upper inclined surface 4 is arranged above the lower inclined surface 5, and the connecting part between the upper inclined surface 4 and the lower inclined surface 5 is close to the bottom of the prestressed concrete steel tube truss composite plates 1, and the tape 3 is laid on the upper inclined surface 4, and the trapezoidal plugging rubber strip 2 is arranged between adjacent prestressed concrete steel tube truss composite plates 1 in a manner of larger at the top and smaller at the bottom, and concrete is poured between adjacent prestressed concrete steel tube truss composite plates 1 to form a floor slab.
[0020] The present invention provides a large gap formwork-free plugging structure between prestressed concrete steel tube truss composite plates, which adopts a trapezoidal plugging rubber strip 2 and an adhesive tape 3; the trapezoidal plugging rubber strip 2 is connected to the adjacent prestressed concrete steel tube truss composite plates 1 on both sides by the adhesive tape 3, and the side surface (i.e., the butt surface) of the prestressed concrete steel tube truss composite plate 1 has a convex surface, and the convex surface includes an upper inclined surface 4 and a lower inclined surface 5, and the upper inclined surface 4 is arranged above the lower inclined surface 5, and the connection portion between the upper inclined surface 4 and the lower inclined surface 5 is close to the bottom of the prestressed concrete steel tube truss composite plate 1, and the adhesive tape 3 is laid on the upper inclined surface 4, and the trapezoidal plugging rubber strip 2 is arranged on the adjacent prestressed concrete steel tube truss in a manner of being larger at the top and smaller at the bottom. When concrete is poured between adjacent prestressed concrete steel tube truss composite plates 1 to form a floor slab, the adjacent prestressed concrete steel tube truss composite plates 1 rely on the vertical downward pressure after the concrete pouring to convert the rubber strips and the vertical pressure between the composite plates to increase the friction between the two, and firmly block the large gaps between the adjacent prestressed concrete steel tube truss composite plates 1, thereby avoiding the situation where when the gaps between the adjacent prestressed concrete steel tube truss composite plates 1 are wide, it is difficult to ensure that the concrete does not leak when injected with ordinary foam glue, and even concrete aggregate may leak and form cavities, thereby affecting the protective effect of concrete on structural steel bars (especially at the junction of beams and slabs), and affecting the quality and service life of the final floor structure product.
[0021] As a preferred embodiment, in the above-mentioned large gap formwork-free plugging structure between prestressed concrete steel tube truss composite plates, the trapezoidal plugging rubber strip 2 is an aging-resistant and corrosion-resistant medium-hardness trapezoidal plugging rubber strip.
[0022] As a preferred embodiment, in the above-mentioned prestressed concrete steel tube truss composite plate large gap formwork-free plugging structure, the tape 3 is laid on the lower part of the upper inclined surface 4 to ensure that the composite plate steel bars are in full contact with the cast-in-place concrete and cast as one piece.
[0023] As a preferred embodiment, in the above-mentioned large gap formwork-free plugging structure between prestressed concrete steel tube truss composite plates, a truss steel bar 6 is provided on the prestressed concrete steel tube truss composite plate 1, and the truss steel bar 6 is in a regular zigzag shape with sharp corners on both sides. The sharp corner on one side of the truss steel bar 6 is prefabricated inside the prestressed concrete steel tube truss composite plate 1, and the sharp corner on the other side of the truss steel bar 6 is located outside the prestressed concrete steel tube truss composite plate 1, and the corresponding sharp corners of adjacent truss steel bars 6 located outside the prestressed concrete steel tube truss composite plate 1 are connected by a welded steel pipe 12, so that the overall strength of the floor slab formed by casting multiple prestressed concrete steel tube truss composite plates 1 can be made higher.
[0024] As a preferred embodiment, in the above-mentioned prestressed concrete steel tube truss composite plate large gap free formwork plugging structure, the tape 3 is EVA sponge tape. EVA refers to ethylene-vinyl acetate copolymer, and its full English name is ethylene-vinyl acetate copolymer. EVA sponge tape 3 has the advantages of good electrical conductivity, buffering, shock resistance, heat insulation, moisture resistance, chemical corrosion resistance, non-toxicity, and non-water absorption.
[0025] As a preferred embodiment, in the above-mentioned large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates, the precast beam includes a rectangular steel frame 7 and a bottom concrete block 8, the lower part of the rectangular steel frame 7 is pre-cast in the bottom concrete block 8, and the horizontal steel bars 11 of the prestressed concrete steel tube truss composite plate 1 located on the outside extend into the corresponding rectangular steel frame 7 of the precast beam by at least 10 mm.
[0026] The utility model discloses a construction method for a large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates, comprising the following steps:
[0027] The first step is to build the composite beam-slab support system according to the special plan and pass the acceptance. The top of the frame erection pole of the composite beam-slab support system adopts a top support, and the square steel keel is installed inside the top support as a supporting beam to ensure the overall stability of the frame.
[0028] In the second step, the prefabricated beam (i.e. the prefabricated part of the beam) is hoisted into place and the beam side formwork 9 is installed.
[0029] In the third step, the prestressed concrete steel tube truss composite plate 1 is hoisted into place, the composite plate steel bars on both sides extend into the beam, and the plate body is tightly placed on the precast beam side formwork 9 to ensure that it penetrates 10mm into the precast beam. That is, when hoisting the precast composite plate, ensure that the beam side composite plate is placed on the beam side formwork 9 and penetrates 10mm into the precast beam. The middle plates are hoisted in turn, and the spacing between the plates is controlled within 10mm. The beam side plate on the other side also needs to be placed on the beam side formwork 9 and penetrate 10mm into the beam. When hoisting the prestressed composite plate components, the 12-point hoisting method is adopted, and the hoisting points are evenly distributed to prevent the loss of prestressing due to excessive span.
[0030] The fourth step is to seal the gaps between the boards that are not larger than 10 mm with expanded foam glue, and to affix thickened and widened EVA sponge tape 3 on both sides of the gaps between the boards that are larger than or equal to 10 mm. The tape 3 is affixed close to the bottom to ensure that the steel bars of the prestressed concrete steel tube truss composite slab are in full contact with the cast-in-place concrete, and are cast as one, thus forming the cast-in-place part 13 of the floor slab.
[0031] The fifth step is to place a medium-hardness trapezoidal leak-proof rubber strip 2 with good anti-aging and anti-corrosion properties in the gap between the plates that is greater than or equal to 10 mm, and press it to make it firmly bonded with the tape 3.
[0032] The sixth step is to tie the steel bars, fully vibrate the cast-in-place beam and slab concrete 10 times, and maintain thermal insulation and moisture retention. It is prohibited to remove the formwork before the structure reaches the design strength.
[0033] The utility model provides a formwork-free plugging structure for large gaps between prestressed concrete steel tube truss composite plates. It is based on the fact that large gaps between prefabricated composite plates are easily formed during hoisting and arrangement, which leads to leakage, or that through-slits are easily formed between beams and plates after pouring. After the composite plates are hoisted, this plugging device is placed before the reinforcement is tied to prevent quality problems caused by leakage during pouring. The device has the advantages of simple operation, safety and reliability.
[0034] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation to the scope of the utility model. Any changes and modifications made by ordinary technicians in this field based on the above disclosure shall fall within the scope of protection of the claims.
Claims
1. A large gap between prestressed concrete steel tube truss composite plates without formwork plugging structure, characterized in that: The invention comprises a plurality of prestressed concrete steel tube truss composite plates, wherein the plurality of prestressed concrete steel tube truss composite plates are arranged in a straight line, and there are gaps between adjacent prestressed concrete steel tube truss composite plates, and the gaps between adjacent prestressed concrete steel tube truss composite plates with a gap width less than 10 mm are sealed with expanding foam, and the gaps between adjacent prestressed concrete steel tube truss composite plates with a gap width greater than or equal to 10 mm are sealed with trapezoidal leak-proof rubber strips, and the trapezoidal leak-proof rubber strips are connected to the adjacent prestressed concrete steel tube truss composite plates on both sides by adhesive tape, and the side surfaces of the prestressed concrete steel tube truss composite plates have an outer convex surface The convex surface includes an upper inclined surface and a lower inclined surface, the upper inclined surface is arranged above the lower inclined surface, the connecting portion between the upper inclined surface and the lower inclined surface is close to the bottom of the prestressed concrete steel tube truss composite plate, the tape is laid on the upper inclined surface, the trapezoidal leak-proof rubber strip is arranged between adjacent prestressed concrete steel tube truss composite plates in a manner of larger upper portion and smaller lower portion, a precast beam is arranged on the outer side of the prestressed concrete steel tube truss composite plate located on the outer side, the prestressed concrete steel tube truss composite plate located on the outer side is connected to the precast beam by pouring concrete, and concrete is poured between adjacent prestressed concrete steel tube truss composite plates to form a floor slab.
2. The large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates as claimed in claim 1, characterized in that: The prestressed concrete steel tube truss composite plate is provided with truss steel bars, which are in a regular zigzag shape and have sharp corners on both sides. The sharp corner on one side of the truss steel bars is prefabricated inside the prestressed concrete steel tube truss composite plate, and the sharp corner on the other side of the truss steel bars is located outside the prestressed concrete steel tube truss composite plate. The corresponding sharp corners of adjacent truss steel bars located outside the prestressed concrete steel tube truss composite plate are connected by welding steel pipes.
3. The large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates as claimed in claim 1, characterized in that: The precast beam comprises a rectangular steel frame and a bottom concrete block, the lower part of the rectangular steel frame is precast in the bottom concrete block, and the horizontal steel bars of the prestressed concrete steel tube truss composite plate located on the outside extend into the corresponding rectangular steel frame of the precast beam by at least 10 mm.
4. The large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates according to claim 1, characterized in that: The adhesive tape is laid on the lower part of the upper inclined surface.
5. The large gap formwork-free leak-proof structure between prestressed concrete steel tube truss composite plates as claimed in claim 1, characterized in that: The adhesive tape is an EVA sponge tape.