Prestressed hollow beam slab inner tire membrane

Abstract

The utility model discloses an inner tire film of a prestressed hollow beam plate, and relates to the technical field of prestressed hollow beam plates. The prestressed hollow beam plate inner tire mold comprises a long-strip-shaped foam core mold, a plurality of reinforcing pieces are arranged on the outer surface of the foam core mold in the circumferential direction of the foam core mold, each reinforcing piece is of a bendable long-strip-shaped structure and extends from one end of the foam core mold to the other end of the foam core mold in the length direction of the foam core mold, and the reinforcing pieces are connected with the foam core mold through connecting pieces. The reinforcing pieces are arranged on the outer surface of the foam core mold, the reinforcing pieces and the foam core mold are connected together through the connecting pieces, so that the reinforcing pieces and the foam core mold form a whole, and the reinforcing pieces can provide additional support and constraint when the foam core mold is bent due to the bendable long-strip-shaped structures of the reinforcing pieces; the foam core mold is prevented from being broken or deformed in the bending process, so that the foam core mold can better bear various stresses and deformations possibly occurring in the construction process.

Description

Technical Field

[0001] This application relates to the field of prestressed hollow beam slab construction technology, specifically to an inner membrane for prestressed hollow beam slabs. Background Technology

[0002] Prestressed hollow core slabs are precast concrete components that enhance their load-bearing capacity and durability by applying prestress before or after concrete pouring. These components typically have a hollow structure to reduce their self-weight while maintaining high strength and stiffness. Due to their superior mechanical properties and ease of construction, prestressed hollow core slabs are widely used in highway bridge construction.

[0003] Traditional prestressed hollow beam slab construction methods typically use air capsules, thin-walled steel pipes, corrugated metal pipes, high-density polyethylene plastic pipes, and plastic corrugated pipes as inner membranes. Because these inner membranes are expensive, they need to be removed from the beam slab after concrete pouring for reuse, requiring secondary construction of the end concrete, increasing the complexity and cost of the construction process.

[0004] Patent application CN113276257A discloses a method for integral casting precast hollow beam slabs using a foam core mold as an inner mold. The foam core mold has the advantages of being lightweight and low-cost, and it does not need to be removed after casting, eliminating the need for secondary casting at the beam ends, thus achieving integral casting of the hollow beam slab in one step. However, due to the low strength and brittleness of the foam core mold material, it is generally used in straight sections of hollow beam slabs. When used in hollow beam slabs with small radius curves, it is prone to bending fracture, thus limiting its application in such sections. Utility Model Content

[0005] The purpose of this application is to provide an inner mold for prestressed hollow beam slabs, which solves the problem of easy bending and breakage of foam core molds when used in hollow beam slabs with small radius curves.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] A prestressed hollow beam slab inner membrane includes a long strip-shaped foam core mold. Several reinforcing plates are provided on the outer surface of the foam core mold along its circumference. The reinforcing plates are bendable long strip structures and extend from one end of the foam core mold to the other end along the length direction of the foam core mold. Several reinforcing plates are connected to the foam core mold together by connectors.

[0008] Furthermore, the outer surface of the foam core mold is provided with a plurality of positioning grooves, and the reinforcing piece corresponds one-to-one with the positioning groove, and the reinforcing piece is disposed in the positioning groove corresponding to it.

[0009] Furthermore, the surface of the reinforcing sheet exposed outside the positioning groove is flush with the outer surface of the foam core mold.

[0010] Furthermore, the reinforcing sheet includes bamboo strips.

[0011] Furthermore, the connector includes metal wires that bind and connect a plurality of the reinforcing sheets to the foam core mold.

[0012] Furthermore, the metal wire includes stainless steel wire.

[0013] Furthermore, the cross-sectional shape of the foam core mold is circular or rectangular.

[0014] Furthermore, the foam core mold is provided with a fixing member, which is used to connect with the steel reinforcement skeleton inside the prestressed hollow beam slab.

[0015] Furthermore, the fastener includes a ring-shaped fixing steel bar, and the foam core mold and its reinforcing sheet are inserted into the fixing steel bar.

[0016] Furthermore, the fastener also includes a supporting steel bar connected to the fixed steel bar.

[0017] The beneficial effects of this application are:

[0018] The prestressed hollow beam slab inner membrane provided in this application embodiment has several reinforcing plates set on the outer surface of the foam core mold and connected to the foam core mold with connectors, so that the reinforcing plates and the foam core mold form an integral whole. The reinforcing plates can significantly improve the compressive strength and bending stiffness of the foam core mold. The bendable strip structure of the reinforcing plates can provide additional support and restraint when the foam core mold is bent, preventing the foam core mold from breaking or deforming during bending. This allows it to better withstand various stresses and deformations that may occur during construction. It can be used not only in straight hollow beam slabs but also in hollow beam slabs with small radius curves. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the inner membrane structure of the prestressed hollow beam slab provided in the embodiments of this application;

[0021] Figure 2yes Figure 1 A sectional view along line AA.

[0022] Figure 3 This is another structural schematic diagram of the inner membrane of the prestressed hollow beam slab provided in the embodiments of this application;

[0023] Figure 4 yes Figure 3 A cross-sectional view along line BB.

[0024] Figure label:

[0025] 10-Foam core mold;

[0026] 101 - Positioning groove;

[0027] 11-Reinforcing sheet;

[0028] 12-Connector;

[0029] 13-Factors;

[0030] 131 - Fixed reinforcing bars;

[0031] 132 - Supporting reinforcement. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0033] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] See Figure 1 , Figure 2 , Figure 3 , Figure 4 This application provides a prestressed hollow beam slab inner membrane, including a long strip-shaped foam core mold 10. Several reinforcing pieces 11 are provided on the outer surface of the foam core mold 10 along its circumference. The reinforcing pieces 11 are bendable long strip structures and extend from one end of the foam core mold 10 to the other end along the length direction of the foam core mold 10. Several reinforcing pieces 11 are connected to the foam core mold 10 by connectors 12.

[0036] The reinforcing plate 11 is connected to the foam core mold 10 by the connector 12, forming a whole between the reinforcing plate 11 and the foam core mold 10, thus enhancing the stability of the overall structure. The use of the connector can effectively prevent the reinforcing plate 11 from falling off or shifting during use, ensuring that the reinforcing plate 11 is always tightly connected to the foam core mold 10, playing its due role, and improving the reliability and stability of the entire inner tube film.

[0037] By setting several reinforcing plates 11 on the outer surface of the foam core mold 10, not only can the compressive strength and flexural stiffness of the foam core mold 10 be significantly improved, but the impact and wear experienced by the foam core mold 10 during use can also be effectively dispersed and absorbed, enhancing the durability of the foam core mold 10. The bendable elongated structure of the reinforcing plates 11 allows them to provide additional support and restraint when the foam core mold 10 is bent, preventing the foam core mold 10 from breaking or deforming during bending, thereby improving the overall strength and toughness of the foam core mold 10 and enabling it to better withstand various stresses and deformations that may occur during construction.

[0038] Due to the supporting and restraining effect of the reinforcing plate 11, the foam core mold 10 is more stable and reliable during construction, reducing construction interruptions and rework caused by deformation or damage to the foam core mold 10. At the same time, the reinforcing plate 11 extends from one end to the other along the length of the foam core mold 10, making the overall performance of the foam core mold 10 more uniform and consistent, which helps improve the construction quality and precision of the prestressed hollow beam slab, ensuring its structural stability and safety.

[0039] Therefore, the prestressed hollow beam slab inner membrane provided in this application embodiment is not only suitable for straight sections of prestressed hollow beam slabs, but also well adaptable to the construction requirements of small-radius curved sections. The bendable characteristics of the reinforcing plate 11 allow the foam core mold 10 to be bent, meeting the construction requirements of small-radius curved sections, expanding its application range, enabling it to play a good role in various construction environments, and improving the flexibility and adaptability of construction. This application uses the foam core mold 10 as the inner membrane, eliminating the need to remove the foam core mold 10 after concrete pouring, thus eliminating the need for secondary pouring at the beam ends, achieving one-time integral pouring of the hollow beam slab, reducing procedures, and improving construction efficiency.

[0040] In some embodiments, see Figure 2 , Figure 4 The outer surface of the foam core mold 10 is provided with several positioning grooves 101, and the reinforcing piece 11 corresponds to the positioning groove 101 one by one. The reinforcing piece 11 is located in the positioning groove 101 corresponding to it.

[0041] For example, the outer surface of the foam core mold 10 is provided with 8 positioning grooves 101, and 8 reinforcing pieces 11 are respectively disposed in the 8 positioning grooves 101.

[0042] By setting positioning grooves 101 on the outer surface of the foam core mold 10 and making the reinforcing pieces 11 correspond one-to-one with the positioning grooves 101, the accurate positioning of the reinforcing pieces 11 on the foam core mold 10 can be ensured, making it less likely for the reinforcing pieces 11 to shift or misalign during installation.

[0043] The reinforcing plate 11 is embedded in the positioning groove 101, forming a whole with the foam core mold 10, which also enhances the integrity of the entire inner tube membrane. This structure makes the connection between the reinforcing plate 11 and the foam core mold 10 tighter and stronger, better able to withstand various stresses and deformations that may occur during construction, and improve the load-bearing capacity and durability of the entire inner tube membrane.

[0044] In some embodiments, see Figure 2 , Figure 4 The surface of the reinforcing sheet 11 exposed outside the positioning groove 101 is flush with the outer surface of the foam core mold 10.

[0045] Correspondingly, the flush surface design makes the connection between the reinforcing plate 11 and the foam core mold 10 tighter and the surface flatter, reducing gaps and unevenness that may occur during construction. This helps maintain the flatness of the concrete surface during concrete pouring and avoids problems such as uneven concrete thickness caused by uneven surface, thereby improving the construction quality of prestressed hollow beam slabs.

[0046] In some embodiments, the reinforcing sheet 11 comprises bamboo strips. Bamboo strips possess high tensile and compressive strength, with its tensile strength approaching that of Q235 steel. This high strength characteristic allows bamboo strips, when used as the reinforcing sheet 11, to significantly improve the load-bearing capacity and deformation resistance of the foam core mold 10, making it more stable and reliable during construction.

[0047] Bamboo is a fast-growing, renewable resource with a density only 1 / 10 that of steel and 1 / 3 that of concrete. Using bamboo strips as reinforcing sheets 11 not only reduces the weight of the inner membrane but also lowers construction difficulty and cost. Furthermore, bamboo strips are easy to process and mold, and can be cut into different sizes and shapes as needed, facilitating installation and operation by construction personnel. Of course, in other embodiments, the reinforcing sheet 11 may also include other wood or plastic sheets, etc., without specific limitations.

[0048] In some embodiments, see Figure 1 , Figure 2 , Figure 3 , Figure 4 The connector 12 includes metal wires that bind and connect a plurality of reinforcing pieces 11 to the foam core mold 10. For example, the metal wires may include iron wire and stainless steel wire. In use, multiple metal wires can be used to bind and connect the plurality of reinforcing pieces 11 to the foam core mold 10, with the multiple metal wires spaced apart along the length of the foam core mold 10.

[0049] The metal wire has good flexibility and adaptability, and can adapt to reinforcing sheets 11 and foam core molds 10 of different shapes and sizes. The winding and binding of the metal wire can effectively fix the reinforcing sheet 11 and the foam core mold 10 together, ensuring that the reinforcing sheet 11 will not shift or fall off during construction, thereby improving the stability of the entire inner tube film.

[0050] The binding of the metal wire is convenient and requires no complicated tools or equipment, allowing for quick connection of the reinforcing plate 11 to the foam core mold 10, thus shortening construction time and reducing labor intensity. If fine adjustments to the position of the reinforcing plate 11 are needed, this can be achieved simply by loosening and rebinding the metal wire. This adjustability makes construction more flexible and better adaptable to different construction environments and requirements.

[0051] Of course, in other embodiments, the connector 12 may also include a clamp or other connecting structure, as long as it can connect the reinforcing plate 11 to the foam core mold 10. No specific limitation is made here.

[0052] The cross-sectional shape of the foam core mold 10 should be determined according to the cross-sectional shape of the cavity of the prestressed hollow beam slab. For example, the cross-sectional shape of the foam core mold 10 is circular or rectangular. For instance, when the cross-sectional shape of the cavity of the prestressed hollow beam slab is circular, the cross-sectional shape of the foam core mold 10 is also circular.

[0053] In some embodiments, see Figure 3 , Figure 4 The foam core mold 10 is provided with a fixing member 13, which is used to connect with the steel reinforcement skeleton in the prestressed hollow beam slab.

[0054] Correspondingly, by using the fastener 13 to connect the foam core mold 10 to the steel reinforcement frame, the entire inner membrane can be positioned, effectively preventing the inner membrane from shifting during concrete pouring and vibration, and reducing structural defects caused by the inner membrane shifting.

[0055] For example, the fastener 13 includes a ring-shaped fixing steel bar 131, and the foam core mold 10 and its reinforcing sheet 11 are inserted into the fixing steel bar 131. For example, there are multiple fixing steel bars 131, which are spaced apart along the length direction of the foam core mold 10.

[0056] The annular structure of the fixing steel bar 131 can also tightly connect the reinforcing plate 11 and the foam core mold 10 together, while providing additional support for the reinforcing plate 11 and the foam core mold 10, so that the inner membrane can better withstand various stresses and loads that may occur during construction. During construction, the fixing steel bar 131 is welded to the steel skeleton in the prestressed hollow beam slab to position the entire inner membrane.

[0057] For example, the fastener 13 also includes a supporting reinforcing bar 132 connected to the fixed reinforcing bar 131. For instance, one end of the supporting reinforcing bar 132 is welded to the fixed reinforcing bar 131, and the other end of the supporting reinforcing bar 132 is welded to the reinforcing bar skeleton in the prestressed hollow beam slab. Multiple supporting reinforcing bars 132 may be included, and these multiple supporting reinforcing bars 132 are arranged circumferentially along the fixed reinforcing bar 131.

[0058] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A prestressed hollow beam slab inner membrane, characterized in that, The system includes a long strip-shaped foam core mold (10), on the outer surface of the foam core mold (10) a plurality of reinforcing pieces (11) are provided along its circumference. The reinforcing pieces (11) are bendable long strip structures and extend from one end of the foam core mold (10) to the other end along the length direction of the foam core mold (10). The plurality of reinforcing pieces (11) are connected to the foam core mold (10) by connectors (12).

2. The inner membrane of the prestressed hollow beam slab according to claim 1, characterized in that, The outer surface of the foam core mold (10) is provided with a plurality of positioning grooves (101), and the reinforcing piece (11) corresponds one-to-one with the positioning groove (101). The reinforcing piece (11) is located in the positioning groove (101) corresponding to it.

3. The inner membrane of the prestressed hollow beam slab according to claim 2, characterized in that, The surface of the reinforcing sheet (11) exposed outside the positioning groove (101) is flush with the outer surface of the foam core mold (10).

4. The inner membrane of the prestressed hollow beam slab according to claim 2, characterized in that, The reinforcing sheet (11) includes bamboo strips.

5. The inner membrane of the prestressed hollow beam slab according to claim 1, characterized in that, The connector (12) includes a metal wire that binds a plurality of the reinforcing sheets (11) to the foam core mold (10).

6. The inner membrane of the prestressed hollow beam slab according to claim 5, characterized in that, The metal wire includes stainless steel wire.

7. The inner membrane of the prestressed hollow beam slab according to claim 1, characterized in that, The cross-sectional shape of the foam core mold (10) is circular or rectangular.

8. The inner membrane of the prestressed hollow beam slab according to claim 1, characterized in that, The foam core mold (10) is provided with a fixing member (13), which is used to connect with the steel reinforcement skeleton in the prestressed hollow beam slab.

9. The inner membrane of the prestressed hollow beam slab according to claim 8, characterized in that, The fastener (13) includes a ring-shaped fixing steel bar (131), and the foam core mold (10) and the reinforcing plate (11) thereon pass through the fixing steel bar (131).

10. The inner membrane of the prestressed hollow beam slab according to claim 9, characterized in that, The fastener (13) also includes a supporting steel bar (132) connected to the fixing steel bar (131).

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