Height-adjustable prefabricated box girder outer mold
By designing the height-adjustable prefabricated box girder outer form and utilizing the detachable web and flange plate structures, the problem of cumbersome and high-cost outer form configuration in the existing technology is solved, and efficient prefabrication and cost saving of box girder of different sizes are achieved.
Patent Information
- Application Number
- CN202420802534.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-17
AI Technical Summary
Due to the fixed structure of the existing prefabricated box girder, multiple external molds need to be configured during construction of box girders of different spans, which is high cost and time-consuming, reducing the efficiency of box girder prefabrication.
Design a height-adjustable prefabricated box girder outer form, which uses a detachable web and flange plate structure, uses the first and second reinforcements to improve the force-bearing capacity, and adjusts the length of the web and the size and angle of the flange plate. Adapt to the prefabrication of box beams of different sizes.
It achieves efficient prefabrication of box beams of different sizes, reduces prefabrication costs, improves construction efficiency, and the outer mold can be reused.
Smart Images
Figure CN222371896U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of box beams, in particular to an outer mold of a prefabricated box beam with adjustable height. Background Art
[0002] Municipal highway projects involve the construction of prefabricated box girders. Common prefabricated box girders are 20m, 30m, 35m, etc. When a project has 2-3 prefabricated box girders with different spans, due to the different spans of the box girders, the cross-sectional dimensions of the box girders are different. According to the design of the box girder force, the larger the span, the higher the cross-sectional dimensions of the box girder, and the greater the height value h. Usually, the project department needs to configure the corresponding box girder outer mold according to different beam types, which is costly, troublesome and time-consuming, reducing the efficiency of box girder prefabrication. Utility Model Content
[0003] In view of this, the utility model provides a height-adjustable prefabricated box girder outer mold, which solves the technical problem that the structure of the prior art causes low box girder prefabrication efficiency.
[0004] A height-adjustable prefabricated box girder outer mold comprises a bottom plate, web plates are arranged on both sides of the bottom plate in an inclined manner, and a flange plate is arranged at one end of each web plate, wherein:
[0005] The web is formed by splicing a plurality of first steel plates connected in a detachable manner, and a first reinforcement member is provided on the first steel plate, and the reinforcement member is used to improve the force bearing capacity of the first steel plate;
[0006] The flange plate is composed of a plurality of second steel plates rotatably connected to each other. A second reinforcement is arranged on the back of the first steel plate. The second reinforcement is used to improve the force-bearing capacity of the second steel plate. The length of the web plate and / or the size and angle of the flange plate are adjusted to adapt to the prefabrication of box girders of different sizes.
[0007] Preferably or optionally, the beam bottom width, web inclination angle and arc chamfer of the connection between the bottom plate and the web of prefabricated box girders with different spans are the same.
[0008] Preferably or optionally, it further comprises a fixing frame of a detachable structure, and each of the second steel plates is detachably connected to the fixing frame via a first connecting rod;
[0009] Each of the second reinforcement members is detachably connected to the fixing frame via a second connecting rod.
[0010] Preferably or optionally, the first reinforcement member comprises an I-shaped steel, and the I-shaped steel is arranged on a side surface of the first steel plate parallel to its center line.
[0011] Preferably or optionally, the first reinforcement member includes a first primary flute and a first main flute, wherein:
[0012] The first primary ridges are continuously arranged on the back side of the first steel plate adjacent to each side edge, and the first main ridges are fixedly connected to the first primary ridges.
[0013] Preferably or optionally, the second reinforcement member comprises a secondary rib and a second main rib, the height of the second main rib is the same as the height of the first main rib, wherein:
[0014] The secondary ribs are continuously arranged on the back side of the second steel plate adjacent to each side edge, and the second main ribs are fixedly connected to the secondary ribs.
[0015] Preferably or optionally, the fixing frame is composed of a plurality of split blocks, the split blocks are arranged in the shape of a right-angled trapezoid, and the inclination angle of the inclined surface is the same as the inclination angle of the web;
[0016] The disassembled blocks are connected in a detachable manner.
[0017] Beneficial Effects
[0018] The web is composed of multiple second steel plates, which can be detachably adapted to box girders corresponding to webs of different sizes, and the second steel plates are directly rotatably connected. After the first steel plates are disassembled, the relative angles of the second steel plates can be adjusted to achieve prefabrication of box girders of different sizes, which is efficient and reduces prefabrication costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0020] Figure 1 is a schematic diagram of the prefabricated outer mold A;
[0021] Figure 2 is a schematic diagram of the prefabricated outer mold B;
[0022] Figure 3 is a schematic structural diagram of the first steel plate;
[0023] Figure 4 It is a schematic diagram of the structure of the dismantling block, where:
[0024] 1. Bottom plate; 2. Web plate; 3. Flange plate; 4. Fixed frame; 21. First steel plate; 22. First connecting rod; 23. I-shaped steel; 24. First rib; 25. First main rib; 31. Second steel plate; 41. Dismantling block; 42. Second connecting rod; 43. Support rod. DETAILED DESCRIPTION
[0025] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
[0026] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.
[0027] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.
[0028] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The drawings only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.
[0029] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will appreciate that aspects may be practiced without these specific details.
[0030] See also Figures 1 to 4The height-adjustable prefabricated box girder outer mold comprises a bottom plate 1, webs 2 are arranged on both sides of the bottom plate 1 in an inclined manner, and a flange plate 3 is arranged at one end of each web plate 2, wherein the web plate 2 is spliced by a plurality of first steel plates 21 connected in a detachable manner, and a first reinforcement is arranged on the first steel plate 21, and the reinforcement is used to improve the force-bearing capacity of the first steel plate 21; the flange plate 3 is composed of a plurality of second steel plates 31 rotatably connected to each other, and a second reinforcement is arranged on the back of the first steel plate 21, and the second reinforcement is used to improve the force-bearing capacity of the second steel plate 31, and the prefabrication of box girders of different sizes can be adapted by adjusting the length of the web plate 2 and / or the size and angle of the flange plate 3.
[0031] The preferred application scope of this structure is: the bottom width of prefabricated box girders of different spans, the inclination angle of the web 2 and the arc chamfer connecting the bottom plate 1 and the web 2 are the same; overall, the adjustment angle between the first steel plate 21 and the second steel plate 31 remains unchanged; the structure can be quickly disassembled by hoisting equipment to complete the prefabrication of box girders of different sizes.
[0032] As a specific embodiment provided in this case, a fixing frame 4 with a detachable structure is also included, each first steel plate 21 is detachably connected to the fixing frame 4 through a first connecting rod 22, and each second reinforcement is detachably connected to the fixing frame 4 through a second connecting rod 42. When the size of the web 2 and the flange plate 3 changes, the height of the fixing frame 4 is adjusted accordingly. The fixing frame 4 mainly starts the supporting function. Preferably, both sides of one side of the fixing frame 4 are in contact connection with the back of the web 2.
[0033] As a specific implementation method provided in this case, Figure 3 As shown, the first reinforcement member includes an I-shaped steel 23, which is arranged on the side of the first steel plate 21 parallel to its center line, and also includes a first rib 24 and a first main rib 25, wherein the first rib 24 is continuously arranged at the positions adjacent to each side edge on the back of the first steel plate 21, and the first main rib 25 is fixedly connected to the first rib 24, and the I-shaped steel 23 may not be arranged at the docking position, so as to facilitate the installation of the first steel plate;
[0034] The second reinforcement member includes a secondary rib and a second main rib (the structure is the same as the reinforcement of the first steel plate, not shown in the figure), the height of the second main rib is the same as the height of the first main rib 25, wherein the back side of the second steel plate 31 is continuously provided with secondary ribs near each side position, and the second main ribs are fixedly connected to the secondary ribs.
[0035] Further, such as Figure 4As shown, the fixing frame 4 is composed of a plurality of disassembly blocks 41, and the disassembly blocks 41 are arranged in the shape of a right-angled trapezoid, such as a trapezoidal block of a variable cross-section structure, to ensure that the angle of the overall inclined slope is the same as that of the web 2. The inclined surface of the disassembly block 41 is contact-connected with the back of the first steel plate 21 to share the force of the first steel plate 21 during the prefabricated box girder. The disassembly blocks 41 are connected in a detachable manner. Generally, the detachable manner in the construction field mostly refers to a detachable connection through a flange, such as the matching manner of an extension section and a bolt. Each first steel plate is connected to the corresponding disassembly block through a first connecting rod. Generally, a plurality of obliquely placed reinforcement rods can be arranged in the disassembly block 41 to improve the stability of the disassembly block 41.
[0036] As a specific embodiment provided in this case, the first steel plate 21 is arranged between the first height and the second height of the web 2, the position of the first height of the plate is higher than the position of the second height (preferably, the middle position), and the position of the first height is lower than the height position of the top surface of the first web 2 and the position of the second height is higher than the height of the bottom surface of the first web 2, and / or, the first steel plate 21 between the first height and the top surface of the web 2 is an integrated structure, and the first steel plate 21 between the second height and the bottom surface of the web 2 is an integrated structure. This structure is widely used in practice. Common prefabricated box girders are 20m, 30m, 35m and 40mm, etc. The overall size of the first steel plate 21 is set in units of 2.5mm or 5m. When in use, the web 2 and the flange plate 3 are hoisted by hoisting equipment, and the first steel plate 21 and the demolition block 41 between the first height and the second height are disassembled.
[0037] As a specific implementation scheme provided in this case, a support rod 43 is provided in the horizontal direction at the disassembly block 41 adjacent to the second steel plate 31, and the support rod 43 is fixed. One end of the second connecting rod 42 is detachably mounted on the support rod 43, and the second connecting rod 42 is a rod with adjustable height or length, and a telescopic rod or a height-adjustable rod in the prior art can be used.
[0038] The second steel plates 31 are hinged to each other, and the first steel plate 21 and the second steel plate 31 at the butt joint position between the web plate 2 and the flange plate 3 are hinged to each other.
[0039] In general, the box girder web 2 and flange plate 3 are designed to be detachable to meet the needs of box girder outer formwork with different beam heights, and the joints between the web 2 and flange plate 3 are hinged to meet the needs of different box girder flange cross-sectional sizes, thereby achieving the reuse of outer formwork, saving construction costs and creating benefits.
[0040] During prefabrication, the box girder with the largest span is prefabricated first. For example, the box girder with a span of 35m of the outer form A is manufactured first, and then the outer form B with a span of 30m is manufactured. The prefabrication is completed by removing one or two first steel plates 21 between the first height and the second height, the corresponding blocks 41, and adjusting the relative angles between the second steel plates 31 and at the joints (adjusting the height of the second connecting rod). Finally, when manufacturing the box girder with a span of 25m, the one or two first steel plates 21 between the first height and the second height and the corresponding blocks 41 are removed again, and the angle of the second steel plate 31 is adjusted. The prefabrication can be completed by pouring according to traditional construction technology.
[0041] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Claims
1. A height-adjustable prefabricated box girder outer formwork, characterized in that: It includes a bottom plate, and web plates are arranged on both sides of the bottom plate in an inclined manner, and a flange plate is arranged at one end of each web plate, wherein The web is formed by splicing a plurality of first steel plates connected in a detachable manner, and a first reinforcement member is provided on the first steel plate, and the reinforcement member is used to improve the force bearing capacity of the first steel plate; The flange plate is composed of a plurality of second steel plates rotatably connected to each other. A second reinforcement is arranged on the back of the first steel plate. The second reinforcement is used to improve the force-bearing capacity of the second steel plate. The length of the web plate and / or the size and angle of the flange plate are adjusted to adapt to the prefabrication of box girders of different sizes.
2. The height-adjustable prefabricated box girder outer formwork according to claim 1 is characterized in that: The bottom width, web inclination angle and arc chamfer of the connection between the bottom plate and the web of precast box girders with different spans are the same.
3. The height-adjustable prefabricated box girder outer formwork according to claim 1 is characterized in that: It also includes a fixing frame with a detachable structure, and each of the first steel plates is detachably connected to the fixing frame via a first connecting rod; Each of the second reinforcement members is detachably connected to the fixing frame via a second connecting rod.
4. The height-adjustable prefabricated box girder outer formwork according to claim 3 is characterized in that: The first reinforcement member includes an I-shaped steel, and the I-shaped steel is arranged on a side surface of the first steel plate parallel to the center line thereof.
5. The height-adjustable prefabricated box girder outer formwork according to claim 3 is characterized in that: The first reinforcement member includes a first primary flute and a first main flute, wherein: The first primary ridges are continuously arranged on the back side of the first steel plate adjacent to each side edge, and the first main ridges are fixedly connected to the first primary ridges.
6. The height-adjustable prefabricated box girder outer formwork according to claim 5, characterized in that: The second reinforcing member includes a secondary rib and a second main rib, the height of the second main rib is the same as the height of the first main rib, wherein: The secondary ribs are continuously arranged on the back side of the second steel plate adjacent to each side edge, and the second main ribs are fixedly connected to the secondary ribs.
7. The height-adjustable prefabricated box girder outer formwork according to claim 6, characterized in that: The fixing frame is composed of a plurality of split blocks, the split blocks are arranged in the shape of a right-angled trapezoid, and the inclination angle of the inclined surface is the same as the inclination angle of the web; The disassembled blocks are connected to each other in a detachable manner, and the second steel plate is connected to the top disassembled block in a detachable manner via a second connecting rod.
8. The height-adjustable prefabricated box girder outer formwork according to claim 7, characterized in that: The second connecting rod is a rod adjustable in height or length.
9. The height-adjustable prefabricated box girder outer formwork according to claim 8, characterized in that: The first steel plate is arranged between a first height and a second height of the web, the position of the first height of the plate is higher than the position of the second height, the position of the first height is lower than the height position of the top surface of the first web and the position of the second height is higher than the height of the bottom surface of the first web, and / or, the first steel plate between the first height and the top surface of the web is an integrated structure, and the first steel plate between the second height and the bottom surface of the web is an integrated structure.
10. The height-adjustable prefabricated box girder outer formwork according to claim 9, characterized in that: A support rod is provided in the horizontal direction on the demolition block adjacent to the second steel plate, and one end of the second connecting rod is detachably mounted on the support rod; The second steel plates are hinged to each other, and the first steel plate and the second steel plate at the butt joint position between the web plate and the flange plate are hinged to each other.