Continuous beam internal mold

Abstract

The utility model discloses a continuous beam internal mold which comprises an upper back frame and web back frames hinged to the two sides of the upper back frame, a top mold is installed on the top of the upper back frame, web molds are installed on the web back frames, and the upper back frame has the telescopic freedom degree in the transverse direction. An opening is formed in the middle of the top die, and a lap joint die or a top tooth block die is arranged on the opening. The top of the lap joint die is of a flat plate structure and used for being matched with the top die to form a vault without a top tooth block. The top of the top tooth block die is of a first forming face structure matched with a top tooth block and used for being matched with the top die to form a vault with the top tooth block. The two sides of the lap joint die are in lap joint with the top of the top die, and the bottom of the lap joint die is arranged on the upper back frame in a supporting mode. The hanging basket is applied to the field of hanging basket construction, the upper back frame is used for supporting the lap joint mold or the top tooth block mold, the design of a traditional tooth block position supporting system is omitted, wood molds do not need to be manufactured on site, and therefore the structural stability is enhanced, the forming effect is guaranteed, and meanwhile the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of hanging basket construction technology, specifically a continuous beam inner formwork. Background Technology

[0002] Continuous beam bridges, as an important component of modern transportation infrastructure, are widely used in highway, railway, and urban overpass projects due to their advantages such as strong structural integrity and large span capacity. In the construction of continuous beams, the cantilever casting technology using hanging formwork has become a core process for building long-span bridges. Its key lies in achieving high-precision control of the box girder's cross-sectional geometry through the coordinated operation of internal and external formwork systems.

[0003] The top, side, and corner molds of conventional continuous beam internal formwork are assembled from steel molds of different specifications, which basically achieves the standardization of conventional hanging basket internal formwork. However, for bridge segments with toothed blocks, conventional internal formwork cannot be used for casting. When casting segments with upper toothed blocks, the steel molds and back frames corresponding to the upper toothed block positions need to be removed, and wooden molds need to be fabricated and assembled on-site. Temporary supports are added before casting. When casting segments with lower toothed blocks, the steel molds corresponding to the lower toothed block positions need to be removed, and wooden molds need to be fabricated and assembled on-site before casting.

[0004] Implementing this construction method requires redesigning the toothed block formwork, which is not only time-consuming and increases labor costs, but also results in poor wood formwork molding, affecting the stability of the structure. When using conventional hanging basket top formwork and back frame construction, temporary supports need to be redesigned according to each type of top toothed block, increasing the complexity of on-site design and manufacturing costs, and greatly slowing down the construction efficiency of the inner formwork. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a continuous beam inner mold that effectively simplifies the support system by directly using the upper back frame to support the overlapping mold or the top toothed block mold, eliminating the need for the traditional toothed block support system design and the need to fabricate wooden molds on-site. This enhances structural stability, ensures molding effect, and improves construction efficiency.

[0006] To achieve the above objectives, this utility model provides a continuous beam inner mold, including an upper back frame and a web back frame hinged to both sides of the upper back frame. A top mold is installed on the top of the upper back frame, and a web mold is installed on the web back frame. The upper back frame has a degree of freedom to extend and retract in the lateral direction.

[0007] The top mold has an opening in the middle, and the opening is provided with an overlapping mold or a top toothed block mold.

[0008] The top of the overlapping mold is a flat plate structure, which is used to cooperate with the top mold to form an arch without top teeth;

[0009] The top of the top tooth block mold is a first forming surface structure adapted to the top tooth block, which is used to cooperate with the top mold to form an arch with the top tooth block;

[0010] When the overlapping mold is provided on the opening, the two sides of the overlapping mold overlap the top of the top mold, and the bottom of the overlapping mold is supported on the upper back frame.

[0011] When the opening is provided with the top tooth block mold, the top tooth block mold is fixedly connected to the top mold, and the bottom of the top tooth block mold is supported on the upper back frame.

[0012] In one embodiment, the continuous beam inner formwork further includes an assembly station located on one or both sides of the top of the upper back frame, or the assembly station located on the top of the web back frame, or the assembly station located at the hinge point between the upper back frame and the web back frame.

[0013] The assembly station is detachably equipped with an upper corner mold or an upper corner tooth block mold;

[0014] The top of the upper corner mold is an inclined planar structure, which is used to cooperate with the top mold and / or the web mold to chamfer the top of the dome without upper corner teeth;

[0015] The top of the upper corner tooth block mold is a second forming surface structure adapted to the upper corner tooth block, used to cooperate with the top mold and / or the web mold to chamfer the top of the dome with the upper corner tooth block.

[0016] In one embodiment, the overlapping mold includes a template and a support beam fixedly disposed at the bottom of the template;

[0017] The two sides of the template overlap the top mold and cover the opening, and the support beam passes through the opening and is supported on the upper back frame.

[0018] In one embodiment, the overlap length of the template on the top mold is adjustable to accommodate openings of different sizes.

[0019] In one embodiment, a first telescopic member is hinged between the upper back frame and the web back frame, which drives the web back frame to rotate around the hinge to complete the closing or demolding of the web mold.

[0020] In one embodiment, the upper back frame is provided with a second telescopic member for driving the upper back frame to extend and retract laterally, thereby completing the mold closing or demolding of the top mold in the lateral direction.

[0021] In one embodiment, the hinge point between the upper back frame and the web back frame is higher than the intersection of the web mold and the chamfer on the dome.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] 1. This utility model, by selectively overlapping the top formwork or the top toothed block formwork at the opening of the top formwork, can quickly achieve the forming of an arch with or without top toothed blocks without cutting the wooden formwork or modifying other templates. This makes it easier to switch between toothed block segments and standard segments without toothed blocks in the continuous beam inner formwork, without the need for frequent disassembly and installation of the upper back frame, reducing the need to handle heavy steel structures in high-altitude operations, saving time and labor costs, and improving construction safety.

[0024] 2. This utility model directly supports the overlapping mold or the top toothed block mold by using the upper back frame while overlapping the overlapping mold or the top toothed block mold on the top mold. This eliminates the need for the traditional support system at the toothed block and the need to make wooden molds on site, thereby enhancing structural stability, ensuring molding effect and improving construction efficiency.

[0025] 3. In the preferred embodiment of this utility model, the hinge point between the upper back frame and the web back frame is higher than the intersection of the web mold and the chamfer on the top of the arch. That is, by designing the top mold to be taller, the height of the top mold is higher than the top toothed block and the upper corner toothed block, which effectively avoids the interference area between the back frame and the toothed block. As a result, the same back frame system can be adapted to both toothed and toothless standard segments at the same time, eliminating the back frame support system under the toothed block, reducing complexity and manufacturing costs, and improving installation efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the continuous beam inner mold in the embodiment of this utility model under the standard segment without toothed blocks;

[0028] Figure 2 This is a schematic diagram of the demolding of the continuous beam inner mold under the standard segment without toothed blocks in an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the continuous beam inner mold in the embodiment of this utility model under the toothed block segment;

[0030] Figure 4 This is a schematic diagram of the demolding of the continuous beam inner mold under the toothed block segment in an embodiment of this utility model.

[0031] Reference numerals: 1. Upper back frame; 2. Web back frame; 3. Top mold; 301. Opening; 4. Web mold; 5. Overlap mold; 501. Template; 502. Support beam; 6. Top toothed block mold; 7. Upper corner mold; 8. Upper corner toothed block mold; 9. Upper corner toothed block; 10. First telescopic component; 11. Second telescopic component.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] like Figures 1 to 4 The diagram shows a continuous beam inner formwork disclosed in this embodiment, which mainly includes an upper back frame 1 and web back frames 2 hinged to both sides of the upper back frame 1. A top formwork 3 is detachably mounted on the top of the upper back frame 1 using bolts or other fasteners, and a web formwork 4 is detachably mounted on the outer side of the web back frame 2 using bolts or other fasteners. The upper back frame 1 has a degree of freedom for expansion and contraction in the lateral direction.

[0039] In this embodiment, the top mold 3 has an opening 301 at its center, and an overlapping mold 5 or a top toothed block mold 6 is provided on the opening 301. The top of the overlapping mold 5 is a flat plate structure, which is used to cooperate with the top mold 3 to form an arch without the top toothed block 7. The top of the top toothed block mold 6 is a first forming surface structure adapted to the top toothed block 7, which is used to cooperate with the top mold 3 to form an arch with the top toothed block 7.

[0040] In practical applications, the overlapping mold 5 and the top toothed block mold 6 on opening 301 are used selectively according to requirements. For example, when the inner mold of the continuous beam is forming a segment with toothed blocks, the top toothed block mold 6 is set on opening 301; when the inner mold of the continuous beam is forming a segment without toothed blocks, the overlapping mold 5 is set on opening 301. This allows for the rapid formation of arches with or without top toothed blocks without cutting the formwork or modifying other templates. This makes switching between segments with and without toothed blocks in the inner mold of the continuous beam more convenient, eliminating the need for frequent disassembly and installation of the upper back frame 1, reducing the need for handling heavy steel structures during high-altitude operations, saving time and labor costs, and improving construction safety.

[0041] refer to Figure 1 , Figure 2When an overlapping mold 5 is provided on the opening 301, the two sides of the overlapping mold 5 overlap the top of the top mold 3, and the bottom of the overlapping mold 5 is supported on the upper back frame 1. That is, the overlapping mold 5 is directly supported by the upper back frame 1, forming a triple force transmission path of top mold 3-overlapping mold 5-upper back frame 1, which significantly improves the local anti-deformation ability. More specifically, the overlapping mold 5 includes a template 501 and a support beam 502 fixed to the bottom of the template 501 by welding and / or bolt fixing. The two sides of the template 501 overlap the top mold 3 and cover the opening 301. The support beam 502 passes through the opening 301 and is supported on the upper back frame 1. The overlap length of the template 501 on the top formwork 3 can be flexibly adjusted in the width direction of the bridge cross section. That is, the width of the template 501 is set to be larger in the initial stage. When forming a segment with a narrow bridge cross section (i.e., a smaller width of the opening 301), the overlap length of the template 501 on the top formwork 3 is longer; when forming a segment with a wide bridge cross section (i.e., a larger width of the opening 301), the overlap length of the template 501 on the top formwork 3 is smaller. This allows the overlapping formwork 5 to adapt to dynamically changing bridge segments, realize the construction of multiple segment specifications with a single set of inner formwork, reduce the frequency of template modification, and reduce construction costs.

[0042] refer to Figure 3 , Figure 4 When the opening 301 is provided with a top tooth block mold 6, the top tooth block mold 6 is fixedly connected to the top mold 3 by bolts, and the bottom support of the top tooth block mold 6 is provided on the upper back frame 1, which omits the design of the traditional tooth block support system, effectively simplifies the support system, greatly reduces working time, enhances structural stability, and improves construction efficiency.

[0043] In the specific implementation process, the continuous beam inner mold also has an assembly station. The assembly station is located on one or both sides of the top of the upper back frame 1, or on the top of the web back frame 2, or at the hinge point between the upper back frame 1 and the web back frame 2. An upper corner mold 8 or an upper corner toothed block mold 9 is detachably installed on the assembly station. The top of the upper corner mold 8 is an inclined planar structure, used to cooperate with the top mold 3 and / or the web mold 4 to chamfer the arch without upper corner toothed blocks 10. The top of the upper corner toothed block mold 9 is a second forming surface structure adapted to the upper corner toothed blocks 10, used to cooperate with the top mold 3 and / or the web mold 4 to chamfer the arch with upper corner toothed blocks 10.

[0044] Similar to opening 301, the upper corner mold 8 and the upper corner tooth block mold 9 on the assembly station are also selectively used according to requirements. For example, when the inner mold of the continuous beam is forming a segment with upper corner tooth blocks 10, the upper corner tooth block mold 9 is set on the assembly station. When the inner mold of the continuous beam is forming a segment without upper corner tooth blocks 10, the upper corner mold 8 is set on the assembly station.

[0045] In a preferred embodiment, the hinge point between the upper back frame 1 and the web back frame 2 is higher than the intersection of the web mold 4 and the chamfer on the top of the arch. That is, by designing the top mold 3 to be higher, the height of the top mold 3 is higher than the top toothed block 7 and the upper corner toothed block 10, effectively avoiding the interference area between the back frame and the toothed block. This allows the same back frame system to be adapted to both toothed and toothless standard segments at the same time, eliminating the back frame support system under the toothed block, reducing complexity and manufacturing costs, and improving installation efficiency.

[0046] In the specific implementation process, a first telescopic member 11 is hinged between the upper back frame 1 and the web back frame 2. By controlling the first telescopic member 11, the web back frame 2 can be driven to rotate around the hinge, thus completing the closing or demolding of the web mold 4. Additionally, a second telescopic member 12 is provided on the upper back frame 1 to drive the upper back frame 1 to extend and retract laterally, completing the closing or demolding of the top mold 3 laterally. The first telescopic member 11 and the second telescopic member 12 can be selected from hydraulic cylinders, pneumatic cylinders, or electric push rods, etc.

[0047] When casting the standard segment of the continuous beam inner formwork in this embodiment, which includes the top-less toothed block 7 and the upper corner toothed block 10, the working process is as follows:

[0048] First, by controlling the movement of the first telescopic component 11 and the second telescopic component 12, the top mold 3 and the web mold 4 are moved to the preset position;

[0049] Then, after assembling the overlapping mold 5 and the upper corner mold 8 onto the opening 301 and the assembly station respectively, the standard segment of the toothless block is poured, that is... Figure 1 As shown;

[0050] After the pouring is completed, the first telescopic member 11 is used to drive the web back frame 2 to rotate around the hinge point, thereby rotating and demolding the web mold 4. Then, the second telescopic member 12 is used to achieve transverse demolding of the beam cross-section. Figure 2 As shown;

[0051] Finally, the inner mold is lowered as a whole and shaped to move to the next segment.

[0052] When casting the toothed block segment with the top toothed block 7 and the upper corner toothed block 10, the working process of the continuous beam inner formwork in this embodiment is as follows:

[0053] First, by controlling the movement of the first telescopic component 11 and the second telescopic component 12, the top mold 3 and the web mold 4 are moved to the preset position;

[0054] Then, after assembling the top tooth block mold 6 and the upper corner tooth block mold 9 onto the opening 301 and the assembly station respectively, the tooth block segments are poured, that is... Figure 3 As shown;

[0055] After the pouring is completed, the first telescopic member 11 is used to drive the web back frame 2 to rotate around the hinge point, thereby rotating and demolding the web mold 4. Then, the second telescopic member 12 is used to achieve transverse demolding of the beam cross-section. Figure 2 As shown;

[0056] Finally, the inner mold is lowered as a whole and shaped to move to the next segment.

[0057] The above description is only a preferred embodiment of the present utility model and does not limit the scope of protection of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A continuous beam inner formwork, comprising an upper back frame (1) and a web back frame (2) hinged to both sides of the upper back frame (1), wherein a top formwork (3) is installed on the top of the upper back frame (1), and a web formwork (4) is installed on the web back frame (2), and the upper back frame (1) has a degree of freedom of extension and retraction in the lateral direction. characterized in that The top mold (3) has an opening (301) at the middle position, and the opening (301) is provided with an overlapping mold (5) or a top toothed block mold (6); The top of the overlapping mold (5) is a flat plate structure, which is used to cooperate with the top mold (3) to form an arch without top toothed blocks (7); The top of the top tooth block mold (6) is a first forming surface structure that is adapted to the top tooth block (7) and is used to cooperate with the top mold (3) to form an arch with the top tooth block (7); When the overlapping mold (5) is provided on the opening (301), the two sides of the overlapping mold (5) overlap the top of the top mold (3), and the bottom of the overlapping mold (5) is supported on the upper back frame (1). When the top tooth block mold (6) is provided on the opening (301), the top tooth block mold (6) is fixedly connected to the top mold (3), and the bottom of the top tooth block mold (6) is supported on the upper back frame (1).

2. The continuous beam inner mold according to claim 1, characterized in that, It also includes an assembly station, which is located on one or both sides of the top of the upper back frame (1), or the assembly station is located on the top of the web back frame (2), or the assembly station is located at the hinge of the upper back frame (1) and the web back frame (2). The assembly station is detachably equipped with an upper corner mold (8) or an upper corner tooth block mold (9); The top of the upper corner mold (8) is an inclined planar structure, which is used to cooperate with the top mold (3) and / or the web mold (4) to chamfer the top of the arch without the upper corner tooth block (10); The top of the upper corner tooth block mold (9) is a second forming surface structure adapted to the upper corner tooth block (10), which is used to cooperate with the top mold (3) and / or the web mold (4) to chamfer the top of the dome with the upper corner tooth block (10).

3. The continuous beam inner mold according to claim 1 or 2, characterized in that, The overlapping mold (5) includes a template (501) and a support beam (502) fixed at the bottom of the template (501); The two sides of the template (501) overlap the top mold (3) and cover the opening (301), and the support beam (502) passes through the opening (301) and is supported on the upper back frame (1).

4. The continuous beam inner mold according to claim 3, characterized in that, The overlap length of the template (501) on the top mold (3) is adjustable to accommodate openings (301) of different sizes.

5. The continuous beam inner mold according to claim 1 or 2, characterized in that, A first telescopic member (11) is hinged between the upper back frame (1) and the web back frame (2) to drive the web back frame (2) to rotate around the hinge, thereby completing the closing or demolding of the web mold (4).

6. The continuous beam inner mold according to claim 1 or 2, characterized in that, The upper back frame (1) is provided with a second telescopic component (12) for driving the upper back frame (1) to extend and retract in the lateral direction, thereby completing the mold closing or demolding of the top mold (3) in the lateral direction.

7. The continuous beam inner mold according to claim 1 or 2, characterized in that, The hinge point between the upper back frame (1) and the web back frame (2) is higher than the intersection of the web mold (4) and the chamfer on the top of the arch.

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