Side formwork supporting device and side formwork supporting system of prefabricated box girder

Abstract

The utility model relates to a side formwork device of a prefabricated box girder and a side formwork supporting system. The supporting device comprises a top plate and an adjustable supporting piece. The adjustable supporting piece comprises at least two telescopic rods which are arranged in the vertical direction; one end of the telescopic rod is connected with the top plate; a first hinge lug and a second hinge lug are arranged on one side of the supporting plate, the second hinge lug is movably installed on the supporting plate in the direction from the second hinge lug to the first hinge lug, the first hinge lug and the second hinge lug are hinged to the other ends of the two telescopic rods respectively, a clamping groove is formed in the other side of the supporting plate, and the clamping groove is clamped to a reinforcing rib on the outer side face of the side mold; the reinforcing rib comprises a first surface far away from the side mold, and the first surface extends in the height direction of the side mold along with the inclination angle of the side mold; the clamping groove comprises a first bottom face, and the first bottom face and the first surface are the same in inclination angle and abut against each other. The device can adapt to side molds with different inclination angles, and is simple to operate, convenient to use and high in overall stability.

Description

Technical Field

[0001] The present application relates to the technical field of precast box girders, and particularly to a side form support device and a side form support system for precast box girders. Background Art

[0002] With the continuous development of China's economy and society, local governments have increased their investment in infrastructure, and bridge construction has thus achieved substantial development. In order to improve the construction efficiency of bridges, box girders precast in independent sites are increasingly widely used. During the precast process of adjacent box girders, a support device needs to be set outside the side form to support the side form.

[0003] For example, the utility model with the publication number CN211053992U discloses a side form for precast box girders, which uses a strengthening frame to support the side form. On the one hand, the strengthening frame is an integral structure with a high degree of customization, making it difficult to adapt to side forms with different inclination angles and having a large volume, so it is difficult to be reused. On the other hand, in the overall support system of the side form, a support frame fixed on a sliding rod bears the force transmitted by the strengthening frame. The bearing capacity of this support frame is limited, and its structural stability is poor, posing a risk of overturning. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a side form support device and a side form support system for precast box girders, and their specific technical solutions are as follows.

[0005] A side form support device for precast box girders includes: a top plate and an adjustable support member; the adjustable support member includes:

[0006] At least two telescopic rods arranged in the vertical direction; one end of each telescopic rod is connected to the top plate;

[0007] A support plate, on one side of which there are a first hinge ear and a second hinge ear. The second hinge ear is movably installed on the support plate along the direction from the second hinge ear to the first hinge ear. The first hinge ear and the second hinge ear are respectively hinged to the other ends of the two telescopic rods. On the other side, there is a card slot, and the card slot is clamped on a reinforcing rib on the outer side surface of the side form; the reinforcing rib includes a first surface away from the side form, and the first surface extends along the height direction of the side form following the inclination angle of the side form; the card slot includes a first bottom surface, and the first bottom surface has the same inclination angle as the first surface and abuts against it.

[0008] Further, the telescopic rod includes a first threaded rod, a second threaded rod and a sleeve; the first threaded rod is connected to the sleeve, the second threaded rod is connected to the sleeve, and the thread rotation directions of the first threaded rod and the second threaded rod are opposite, so that when the sleeve rotates, the first threaded rod and the second threaded rod move in opposite directions.

[0009] Further, the sleeve includes a cylinder body, a first nut and a second nut; both ends of the cylinder body are welded to the first nut and the second nut respectively; the first nut is connected to the first threaded rod, and the second nut is connected to the second threaded rod.

[0010] Further, the cylinder body is provided with a through hole penetrating in the radial direction.

[0011] Further, a slider is provided on the second hinge ear, and a chute extending in the direction from the first hinge ear to the second hinge ear is provided on the support plate, and the slider is slidably mounted in the chute.

[0012] Further, the top plate is welded to the first threaded rod.

[0013] Further, a threaded section is provided at the end of the first threaded rod, and the diameter of the threaded section is smaller than that of the first threaded rod to form a stepped portion; an installation hole is provided on the top plate, and the threaded section is inserted into the installation hole so that the stepped portion abuts against the top plate.

[0014] Further, the installation hole includes an enlarged head section, and the enlarged head section is located on the side of the top plate away from the first threaded rod; the threaded section extends into the enlarged head section and is connected to a connecting nut.

[0015] Further, it includes multiple groups of adjustable support members, and the multiple groups of adjustable support members are connected to the same top plate and are arranged along the height direction or the length direction of the side form.

[0016] A side form support system for a precast box girder includes:

[0017] A pedestal for bearing the bottom plate of the precast box girder;

[0018] A concrete foundation, with concrete foundations provided on both sides of the pedestal respectively, and the concrete foundation is higher than the top of the pedestal;

[0019] The side form supporting device as described in any one of the above, and multiple side form supporting devices are arranged along the height direction or the length direction of the side form; the telescopic rod is arranged in the horizontal direction from the side form to the concrete foundation, and the top plate abuts against the concrete foundation.

[0020] Beneficial effects: For the side form supporting device of a precast box girder provided by the present utility model, by adjusting the angle of the support plate, the first bottom surface of the card slot abuts against the reinforcing rib, which can adapt to side forms with different inclination angles. The card slot is engaged with the reinforcing rib on the side form, without the need for installation, and the operation is simple; and the supporting device is designed with a modular structure, with a small single volume and light weight, which is convenient for transfer and use in different construction scenarios or sites.

[0021] A side formwork support system for precast box girders provided by the present utility model has a top plate abutted against a concrete foundation to support the side formwork, eliminating the need for additional connection construction, reducing the construction difficulty, thus improving the construction efficiency. Moreover, the concrete foundation has a stronger bearing capacity, and the overall stability of the side formwork support system is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a side view schematic diagram of the cooperation between the jacking device and the reinforcing rib in Embodiment 1;

[0024] Figure 2 It is a structural schematic diagram of the support plate;

[0025] Figure 3 It is a top view schematic diagram of the jacking device in Embodiment 2;

[0026] Figure 4 For Figure 3 the cross-sectional view along A-A in

[0027] Figure 5 It is a side view schematic diagram of the support system in Embodiment 3.

[0028] Description of the reference numerals in the drawings: 1, top plate; 2, telescopic rod; 3, support plate; 4, reinforcing rib;

[0029] 11, mounting hole; 12, enlarged head section; 13, connecting nut;

[0030] 21, first threaded rod; 22, second threaded rod; 23, first nut; 24, cylinder; 25, second nut; 26, locking bolt; 27, threaded section; 28, step portion;

[0031] 31, first hinge ear; 32, second hinge ear; 33, card slot; 34, chute;

[0032] 100, pedestal; 200, concrete foundation; 300, side formwork jacking device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present application.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0036] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0039] Embodiment 1

[0040] Referring to Figure 1 As shown, this embodiment provides a side formwork supporting device for precast box girders, including a top plate 1 and adjustable supports. The adjustable supports include two telescopic rods 2 and a support plate 3. The two telescopic rods 2 are arranged in the vertical direction, which is the height direction of the side formwork. One end of each telescopic rod 2 is connected to the top plate 1, and the other end is hinged to the support plate 3, and the two telescopic rods 2 are simultaneously hinged to a support plate 3. By adjusting the different lengths of the two telescopic rods 2, the inclination of the support plate 3 can be adjusted to adapt to side formworks with different inclinations.

[0041] In this embodiment, the telescopic rod 2 and the top plate 1 can be connected by welding. In other embodiments, the telescopic rod 2 and the top plate 1 can also be connected by other means, such as bolt connection.

[0042] Specifically, referring to Figure 2 As shown, one side of the support plate 3 is connected with a first hinge ear 31 and a second hinge ear 32. The first hinge ear 31 is welded to the support plate 3, and the second hinge ear 32 is movably installed on the support plate 3 along the direction from the second hinge ear 32 to the first hinge ear 31. A clamping groove 33 is provided on the other side of the support plate 3. The clamping groove 33 is formed by welding two steel plates to the support plate 3. A reinforcing rib 4 is provided on the outer side surface of the side formwork. The reinforcing rib 4 includes a first surface away from the side formwork. The first surface extends in the height direction of the side formwork following the inclination angle of the side formwork, that is, the first surface has the same inclination angle as the inclination angle of the side formwork. It should be noted that in other embodiments, there may also be a slight difference in the inclination angle between the reinforcing rib 4 and the side formwork, and the reinforcing rib 4 can also be a segmented structure. The clamping groove 33 includes a first bottom surface. The first bottom surface has the same inclination angle as the first surface. The clamping groove 33 is clamped on the reinforcing rib 4, and the lengths of the two telescopic rods 2 are adjusted. The second hinge ear 32 then moves in the sliding groove 34, thereby adjusting the angle of the support plate 3 to make the first bottom surface of the clamping groove 33 fit the first surface. Thus, the supporting device can adapt to different angles of the side formwork and support the side formwork.

[0043] A side form support device 300 for precast box girders provided in this embodiment can adapt to side forms with different inclination angles by adjusting the angle of the support plate 3 so that the first bottom surface of the card slot 33 abuts against the reinforcing rib 4. The card slot 33 is engaged with the reinforcing rib 4 on the side form, eliminating the need for installation and featuring simple operation. Moreover, the support device is designed with a modular structure, having a small single-unit volume and light weight, making it convenient to be transferred and used in different construction scenarios or sites.

[0044] Specifically, the telescopic rod 2 includes a first threaded rod 21, a second threaded rod 22 and a sleeve. The first threaded rod 21 is connected to the sleeve, and the second threaded rod 22 is connected to the sleeve. Specifically, the sleeve includes a cylinder body 24, a first nut 23 and a second nut 25 welded to both ends of the cylinder body 24. Both ends of the cylinder body 24 are welded to the first nut 23 and the second nut 25 respectively. The first nut 23 is connected to the first threaded rod 21, and the second nut 25 is connected to the second threaded rod 22. The first threaded rod 21 and the second threaded rod 22 have opposite helix directions, so that when the sleeve is rotated, the moving directions of the first threaded rod 21 and the second threaded rod 22 are opposite.

[0045] Specifically, when installing the support device, it is necessary to rotate the sleeve to move the threaded rod to provide a certain pre-tightening force for the side plate. To facilitate the rotation of the sleeve, a through hole is provided in the sleeve along the radial direction. By inserting a pin into the through hole, it is convenient for construction workers to turn the sleeve.

[0046] Specifically, continue to refer to Figure 2 As shown, a slider is provided on the second hinge ear 32, and a chute 34 extending in the direction from the first hinge ear 31 to the second hinge ear 32 is provided on the support plate 3. The slider is slidably installed in the chute 34, and the end face of the slider is spherical. When the telescopic rod 2 expands and contracts to change the inclination of the support plate 3, the slider moves in the chute 34 accordingly, changing the position of the second hinge ear 32 to keep the two telescopic rods 2 parallel.

[0047] The telescopic rod 2 is connected to the first hinge ear 31 or the second hinge ear 32 through a locking bolt 26 and a locking nut. During the installation of the support device, when adjusting the distance between the first threaded rod 21 and the second threaded rod 22 to change the inclination angle of the support plate 3, first loosen the locking bolt 26 so that the support plate 3 can rotate relative to the second threaded rod 22. After the angle adjustment is completed, tighten the locking bolt 26 to fix the angle of the support plate 3 and ensure the stability of the support plate 3.

[0048] Embodiment 2

[0049] Refer to Figure 3As shown in the figure, this embodiment also provides a prefabricated adjacent side formwork support device, which includes a top plate 1 and a plurality of adjustable supports. The structure of the adjustable support is the same as that in Embodiment 1. The difference is that in this embodiment, multiple groups of adjustable supports are arranged along the height direction or the length direction of the side formwork. In Figure 3 Although only two adjustable supports arranged along the length direction of the side formwork are listed, those skilled in the art can also understand the way of multiple adjustable supports arranged along the height direction or the length direction of the side formwork in combination with Figure 3 the figure. By connecting multiple adjustable supports to the same top plate 1, the multiple adjustable supports form an integral body, increasing the support range of a single support device and further improving the reliability of the support.

[0050] Specifically, in this embodiment, the connection between the first threaded rod 21 and the top plate 1 is detachable, facilitating the disassembly of the top plate 1 and the multiple adjustable supports for reuse.

[0051] Specifically, referring to Figure 4 the figure, a threaded section 27 is further provided at the end of the first threaded rod 21. The diameter of the threaded section 27 is smaller than that of the first threaded rod 21 to form a stepped portion 28. A corresponding mounting hole 11 is provided on the top plate 1. The threaded section 27 is inserted into the mounting hole 11 so that the stepped portion 28 abuts against the top plate 1. And the mounting hole 11 further includes an enlarged head section 12, enabling the threaded section 27 to be connected to the connecting nut 13 after extending into the blind hole, thereby connecting the first threaded rod 21 to the top plate 1. And by controlling the length of the threaded section 27, the end of the threaded section 27 does not protrude out of the blind hole.

[0052] Embodiment 3

[0053] Referring to Figure 5 the figure, this embodiment provides a side formwork support system for precast box girders, which includes a pedestal 100, a concrete foundation 200, and a side formwork support device 300 as described in Embodiment 1 or Embodiment 2. The pedestal 100 is used to carry adjacent precast bottom plates. Two groups of concrete foundations 200 are respectively arranged on both sides of the pedestal 100, and the concrete foundation 200 is higher than the top of the pedestal 100. Multiple side formwork support devices 300 are arranged along the height direction or the length direction of the side formwork; the telescopic rod 2 is arranged in the horizontal direction from the side formwork to the concrete foundation 200, and the top plate 1 abuts against the concrete foundation 200. Thus, the support for the side formwork is realized.

[0054] Construction process: First, adjust the lengths of the first telescopic rod 2 and the second telescopic rod 2 respectively, so that the inclination of the first bottom surface on the support plate 3 is approximately the same as the inclination of the first surface on the reinforcing rib 4, and the length of the side formwork support device 300 is slightly less than the distance from the concrete foundation 200 to the side formwork. Then engage the card slot 33 with the reinforcing rib 4, and adjust the length of the telescopic rod 2 again until the top plate 1 abuts against the concrete foundation 200, the first bottom surface fits with the first surface, and continue to rotate the sleeve to apply a certain pre-tightening force.

[0055] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0056] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A side formwork support device for a prefabricated box beam, characterized in that: include: top plate and adjustable supports; The adjustable support member comprises: At least two telescopic rods are arranged in a vertical direction; one end of each telescopic rod is connected to the top plate; A support plate, one side of which is provided with a first hinge ear and a second hinge ear, the second hinge ear is movably installed on the support plate along the direction from the second hinge ear to the first hinge ear, the first hinge ear and the second hinge ear are respectively hinged to the other ends of the two telescopic rods, and the other side is provided with a slot, the slot is clamped on the reinforcing rib on the outer side of the side mold; the reinforcing rib includes a first surface away from the side mold, the first surface extends in the height direction of the side mold following the inclination angle of the side mold; the slot includes a first bottom surface, the first bottom surface and the first surface have the same inclination angle and are against each other.

2. The side formwork support device for a prefabricated box beam according to claim 1, characterized in that: The telescopic rod includes a first threaded rod, a second threaded rod and a sleeve; the first threaded rod is connected to the sleeve, the second threaded rod is connected to the sleeve, and the threads of the first threaded rod and the second threaded rod are opposite in direction, so that the first threaded rod and the second threaded rod move in opposite directions when the sleeve rotates.

3. The side formwork support device for a prefabricated box beam according to claim 2, characterized in that: The sleeve comprises a barrel, a first nut and a second nut; two ends of the barrel are respectively welded to the first nut and the second nut; the first nut is connected to the first threaded rod, and the second nut is connected to the second threaded rod.

4. The side formwork support device for a prefabricated box beam according to claim 3, characterized in that: The cylinder is provided with a through hole penetrating in the radial direction.

5. The side formwork support device for a prefabricated box beam according to claim 1, characterized in that: The second hinge ear is provided with a sliding block, the support plate is provided with a sliding groove extending from the first hinge ear to the second hinge ear, and the sliding block is slidably installed in the sliding groove.

6. The side formwork support device for a prefabricated box beam according to claim 2, characterized in that: The top plate is welded to the first threaded rod.

7. The side formwork support device for a prefabricated box beam according to claim 2, characterized in that: A threaded section is provided at the end of the first threaded rod, and the diameter of the threaded section is smaller than the diameter of the first threaded rod to form a step portion; a mounting hole is provided on the top plate, and the threaded section is inserted into the mounting hole so that the step portion abuts against the top plate.

8. The side formwork support device for a prefabricated box beam according to claim 7, characterized in that: The mounting hole comprises an enlarged head section, which is located on a side of the top plate away from the first threaded rod; the threaded section extends into the enlarged head section and is connected to the connecting nut.

9. The side formwork support device for a prefabricated box beam according to claim 7, characterized in that: It comprises a plurality of groups of adjustable support members, which are connected to the same top plate and are arranged along the height direction or the length direction of the side mold.

10. A side formwork support system for a prefabricated box girder, characterized in that: include: A pedestal, used to support the bottom plate of the precast box girder; Concrete foundation, with concrete foundations provided on both sides of the pedestal, and the concrete foundations are higher than the top of the pedestal; According to the side form supporting device as described in any one of claims 1 to 9, multiple side form supporting devices are arranged along the height direction or the length direction of the side form; the telescopic rod is arranged in the horizontal direction from the side form to the concrete foundation, and the top plate is against the concrete foundation.

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