Temporary fixing and hoisting device for small box girder bridge deck continuous structure test piece

Abstract

The utility model discloses a temporary fixing and hoisting device for a small box girder bridge deck continuous structure test piece. The temporary fixing and hoisting device comprises a cross brace, a plurality of side cross rods and a plurality of side inclined rods, the two ends of the cross brace are erected on the embedded anchor bars extending out of the opposite faces of the two main beam end models correspondingly and abut against the two main beam end models correspondingly. A plurality of side cross rods are arranged on the two sides of the cross brace in parallel and are fixed to the two side faces flush with the two main beam end models respectively; all the side cross rods positioned on each side of the two main beam end models are provided with side inclined rods; the distance between the upper end of each side portion inclined rod and the corresponding main beam end model is larger than the distance between the lower end of each side portion inclined rod and the corresponding main beam end model. In all the side cross rods on each side of the two main beam end models, the part, between the upper end of each corresponding side inclined rod and the corresponding main beam end model, of the side cross rod located on the uppermost portion serves as a hoisting point position. The device can provide a hoisting point position for the test piece and effectively restrain the deformation of the test piece at the same time.

Description

Technical Field

[0001] This utility model relates to the field of continuous structure test technology for small box girder bridge decks, and in particular to a temporary fixing and hoisting device for test specimens of continuous structure for small box girder bridge decks. Background Technology

[0002] Continuous joints in small box girder structures are a widely used structural feature, but they are also prone to failure. Common failure modes include:

[0003] (1) Cracks: including transverse cracks and longitudinal cracks, mostly caused by concrete shrinkage, temperature changes, vehicle loads, etc.

[0004] (2) Damage to sealant: Sealing materials such as rubber strips become aged, fall off, or break, losing their sealing and cushioning functions;

[0005] (3) Misalignment: Uneven settlement or displacement occurs between adjacent small box girders, forming misalignment, which affects driving comfort and safety.

[0006] To gain a deeper understanding of its mechanical properties and failure mechanisms, provide accurate data for design, optimize structural design, assess the applicability of different materials and constructions, and improve the durability and reliability of continuous joints, researchers need to conduct extensive experimental studies on continuous joints in small box girders.

[0007] Commonly used test structures include using thin-plate local full-scale tests to simulate the continuous connection between the beam ends and the bridge deck of a small box girder. During hoisting and transportation, such test models are prone to excessive deformation and damage to the continuous structure due to the very fragile continuous structure of the bridge deck.

[0008] Therefore, ensuring the structural reliability of the small box girder bridge deck continuous structure test specimen during transportation has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0009] In view of the above-mentioned deficiencies of the prior art, the present invention provides a temporary fixing and hoisting device for the test specimen of continuous structure of small box girder bridge deck, the purpose of which is to ensure the structural reliability of the test specimen of continuous structure of small box girder bridge deck during transportation.

[0010] To achieve the above objectives, this utility model discloses a temporary fixing and hoisting device for a continuous structural test piece of a small box girder bridge deck, used for fixing and hoisting the test piece; the test piece includes two main beam end models, each with a cantilever arm on one side facing each other.

[0011] The temporary fixing and hoisting device includes horizontal bracing, several side horizontal bars, and side diagonal bars;

[0012] The cross brace is set between the two main beam end models, below the cantilever arm of the main beam, with both ends supported on the pre-embedded steel bars extending from the opposite side of the two main beam end models, and respectively supporting the side of the corresponding main beam end model facing the other main beam end model.

[0013] Several of the side crossbars are arranged parallel to each other on both sides of the cross brace and fixed to the two sides of the two main beam end models, respectively.

[0014] All the side crossbars located on each side of the two main beam end models are provided with a side diagonal bar located between the two main beam end models and close to each main beam end model;

[0015] Each of the aforementioned side diagonal braces is fixedly connected to all the aforementioned side cross braces on the corresponding side, and the distance between the upper end and the corresponding main beam end model is greater than the distance between the lower end and the corresponding main beam end model;

[0016] In all the side crossbars on each side of the two main beam end models, the portion of the uppermost side crossbar between the upper end of each corresponding side diagonal bar and the corresponding main beam end model is used as the hoisting point.

[0017] Preferably, the cross brace is a steel structure, a precast concrete component, or a precast reinforced concrete component; the diameter of each of the embedded reinforcing bars is φ20.

[0018] Preferably, each side of the two main beam end models is provided with two or more side crossbars.

[0019] Preferably, the number of the side crossbars located on both sides of the two main beam end models is the same, and they correspond one-to-one along the height direction;

[0020] Each pair of side crossbars located at the same height on both sides of the two main beam end models are fixed by several anchor bars that penetrate the two main beam end models and external threads and nuts set at both ends of the corresponding anchor bars.

[0021] More preferably, each of the side crossbars is made of steel profiles, and each profile has a slotted hole at the position for inserting the corresponding anchor bar.

[0022] More preferably, each of the main beam end models is provided with a pre-embedded PVC pipe at the location of each anchor bar.

[0023] More preferably, the end of each side diagonal brace closest to the corresponding main beam end model is in close contact with the corresponding main beam end model, and forms a triangular connection structure with the corresponding main beam end model and all the side diagonal braces on the same side.

[0024] Preferably, expanding foam is provided between the two main beam cantilever arms.

[0025] Preferably, a continuous structural layer in the shape of a plate is provided on the top of the two main beam end models that are flush with each other, and reinforced concrete slabs are provided at both ends of the continuous structural layer.

[0026] The beneficial effects of this utility model are:

[0027] This invention can provide hoisting points for test specimens, effectively constrain the deformation of test specimens, prevent the bridge deck from failing prematurely due to unbalanced forces during hoisting, and the device can be easily reused, reducing the cost of temporary measures for batch test specimens.

[0028] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0029] Figure 1 This diagram shows a structural schematic of one embodiment of the present invention with only a cross brace.

[0030] Figure 2 This utility model is shown Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.

[0031] Figure 3 This utility model is shown Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0032] Figure 4 This diagram shows a structural schematic of an embodiment of the present invention, which includes a cross brace, a side crossbar, and a side diagonal bar.

[0033] Figure 5 This utility model is shown Figure 4 Schematic diagram of the cross-sectional structure along the CC direction. Detailed Implementation

[0034] Example

[0035] like Figures 1 to 5 As shown, a temporary fixing and hoisting device for the continuous structural test specimen of the small box girder bridge deck is used to fix and hoist the test specimen; the test specimen includes two main beam end models 4 with main beam cantilever arms 41 on one side facing each other.

[0036] The temporary fixing and hoisting device includes a horizontal brace 1, several side horizontal bars 2 and side diagonal bars 3;

[0037] The cross brace 1 is set between the two main beam end models 4, below the main beam cantilever 41, with both ends supported on the pre-embedded steel bars 42 extending from the opposite side of the two main beam end models 4, respectively, and supporting the side of the corresponding main beam end model 4 facing the other main beam end model 4.

[0038] Several side crossbars 2 are arranged parallel to each other on both sides of the cross brace 1 and fixed to the two sides of the two main beam end models 4, respectively.

[0039] All side crossbars 2 located on each side of the two main beam end models 4, and a side diagonal bar 3 located between the two main beam end models 4 and close to each main beam end model 4.

[0040] Each side diagonal brace 3 is fixedly connected to all the side horizontal braces 2 on the corresponding side, and the distance between the upper end and the corresponding main beam end model 4 is greater than the distance between the lower end and the corresponding main beam end model 4.

[0041] In all the side crossbars 2 on each side of the two main beam end models 4, the portion of the uppermost side crossbar 2 between the upper end of each corresponding side diagonal bar 3 and the corresponding main beam end model 4 is used as the hoisting point 5.

[0042] The present invention includes a cross brace 1, which can reduce the deformation of the main beam end, withstand pressure, reduce the continuous tension on the bridge deck, prevent the test piece from arching upwards during hoisting, and eliminate the hidden danger that the main beam end near the lower edge will deform inwards.

[0043] Meanwhile, the addition of side crossbars 2 and side diagonal braces 3 further integrates the two main beam end models 4 into a single unit, improving the rigidity and deformation resistance of the components during transportation.

[0044] Although the cross brace 1 is simply placed on the pre-embedded steel bar 42, it will not fall out during the hoisting process because it is constrained by the side cross bar 2 and the side diagonal bar 3 on both sides. It can play a role in bearing the force and is easy to dismantle and reuse.

[0045] In some embodiments, the cross brace 1 is a steel structure, a precast concrete component, or a precast reinforced concrete component; the diameter of each embedded steel bar 42 is φ20.

[0046] In some embodiments, each side of the two main beam end models 4 is provided with two or more side crossbars 2.

[0047] In some embodiments, the number of side crossbars 2 located on both sides of the two main beam end model 4 is the same, and they correspond one-to-one along the height direction;

[0048] Each pair of side crossbars 2 located at the same height on both sides of the two main beam end models 4 are fixed by several anchor bars that penetrate the two main beam end models 4 and external threads and nuts 22 set at both ends of the corresponding anchor bars.

[0049] In practical applications, the side crossbar 2 is fixed to the main beam end model 4 by external thread and nut 22, which also facilitates disassembly and reuse.

[0050] In some embodiments, each side crossbar 2 is made of steel profile, and the crossbar is provided with a waist-shaped hole at the position for passing through the corresponding anchor bar.

[0051] In some embodiments, each main beam end model 4 has a pre-embedded PVC pipe 43 at the location of each anchor bar.

[0052] In some embodiments, the end of each side diagonal bar 3 closest to the corresponding main beam end model 4 is in close contact with the corresponding main beam end model 4, forming a triangular connection structure with the corresponding main beam end model 4 and all side diagonal bars 3 on the same side.

[0053] In some embodiments, expanding foam 6 is provided between the two main beam cantilever arms 41.

[0054] In some embodiments, a continuous structural layer 7 in the shape of a plate is provided on the top of the two main beam end models 4, which are flush with each other, and reinforced concrete slabs 8 are provided at both ends of the continuous structural layer 7.

[0055] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A temporary fixing and hoisting device for small box girder bridge deck continuous structure test piece, used for fixing and hoisting test piece; the test piece comprises two main girder end models (4) with main girder cantilever arms (41) on one side of each other; characterized in that, the temporary fixing and hoisting device comprises a cross brace (1), a plurality of side horizontal rods (2) and side inclined rods (3); the cross brace (1) is arranged between the two main girder end models (4), below the main girder cantilever arms (41), and is erected on the pre-embedded steel bars (42) extending from one side of each of the two main girder end models (4), and abuts against the side of the main girder end model (4) on the corresponding side towards the other main girder end model (4); a plurality of side horizontal rods (2) are arranged in parallel on both sides of the cross brace (1) and are fixed with the two sides of the two main girder end models (4) flush; all the side horizontal rods (2) on each side of the two main girder end models (4) are provided with a side inclined rod (3) at a position between the two main girder end models (4) and close to each main girder end model (4); each side inclined rod (3) is fixedly connected with all the side horizontal rods (2) on the corresponding side, and the distance between the upper end and the corresponding main girder end model (4) is greater than the distance between the lower end and the corresponding main girder end model (4); in all the side horizontal rods (2) on each side of the two main girder end models (4), the part between the uppermost side horizontal rod (2) and the upper end of the corresponding side inclined rod (3) and the corresponding main girder end model (4) is used as a hoisting point (5).

2. The temporary fixing and hoisting device for the continuous construction test piece of the small box girder bridge deck according to claim 1, characterized in that, The cross brace (1) is a steel structure, a concrete prefabricated part, or a reinforced concrete prefabricated part; the diameter of each pre-embedded steel bar (42) is φ20.

3. The temporary fixing and hoisting device for the continuous construction test piece of the small box girder bridge deck according to claim 1, characterized in that, Each side of the two main girder end models (4) is provided with two or more side horizontal rods (2).

4. The temporary fixing and hoisting device for the continuous construction test piece of the small box girder bridge deck according to claim 1 or 3, characterized in that, The number of side horizontal rods (2) on both sides of the two main girder end models (4) is the same and corresponds to each other in the height direction; each pair of side horizontal rods (2) at the same height on both sides of the two main girder end models (4) is fixed by a plurality of anchor bars penetrating the two main girder end models (4) and external threads and nuts (22) arranged at both ends of the anchor bars.

5. The temporary fixing and hoisting device for the continuous construction test piece of the small box girder bridge deck according to claim 4, characterized in that, Each side horizontal rod (2) is made of a profile steel bar, and the position for penetrating the corresponding anchor bar is provided with a waist-shaped hole.

6. The temporary fixing and hoisting device for the continuous construction test piece of the small box girder bridge deck according to claim 4, characterized in that, Each main girder end model (4) is provided with a pre-embedded PVC pipe (43) at the position of each anchor bar.

7. The temporary fixing and hoisting device for the continuous construction test piece of the small box girder bridge deck according to claim 4, characterized in that, The end of each side inclined rod (3) closest to the corresponding main girder end model (4) is in close contact with the corresponding main girder end model (4), and the corresponding main girder end model (4) and all the side inclined rods (3) on the same side form a triangular connection structure.

8. The temporary fixing and hoisting device for the continuous construction test piece of the small box girder bridge deck according to claim 1, characterized in that, Foaming glue (6) is arranged between the two main girder cantilever arms (41).

9. The temporary fixing and hoisting device for the continuous construction test piece of the small box girder bridge deck according to claim 1, characterized in that, The upper surface of the two beam end models (4) is provided with a plate-shaped continuous construction layer (7), and a reinforced concrete plate (8) is arranged at both ends of the continuous construction layer (7).

Images