Stress structure for keeping passage of central separation strip of closed bridge

Abstract

The utility model discloses a stress structure for keeping the passage of a median strip of a closed bridge, which solves the problem that the median strip cannot be closed conveniently and quickly in the prior art, and has the beneficial effects of convenience in construction and no restriction of field conditions. Comprising a supporting beam arranged in a gap between a first bridge body and a second bridge body, the length direction of the supporting beam is arranged in the length direction of the first bridge body, the two ends of the supporting beam in the length direction are supported, and the upper surface of the supporting beam is flush with the upper surfaces of hollow slabs on the end sides of the first bridge body and the second bridge body; connection steel bars and / or steel bar meshes are laid above the end side hollow slabs of the first bridge body and the second bridge body and above the supporting beams, concrete layers are poured above the end side hollow slabs of the first bridge body and the second bridge body and above the supporting beams, and the concrete layers cover the connection steel bars and / or the steel bar meshes.

Description

Technical Field

[0001] The utility model relates to the field of highway construction, in particular to a force-bearing structure for ensuring the passage of a central dividing strip of a closed bridge. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] As the requirements for safe construction and operation of highway reconstruction and expansion projects continue to increase, some highway reconstruction and expansion projects use one-way main line traffic during construction. The half width of the traffic direction is determined by the local road network conditions, and the half width with priority construction is determined by the previous demolition and requisition work. When there is a conflict between the two, the traffic of the interchange ramp needs to cross the existing central divider, and increase the setting of the existing highway central divider diversion port in the interchange area. Since there are certain gaps in the central divider of existing highway bridges, separated interchanges, passages and other structures, the setting range of the central divider diversion port in the interchange area is greatly affected by the spacing of the structures, and it is inevitable to close the gaps in the central divider of some structures.

[0004] The inventors have found that the common practices for closing the gap in the central dividing strip of a bridge to ensure traffic flow in the current highway reconstruction and expansion projects are:

[0005] ① Close the gap in the central median by setting up cast-in-place superstructures such as scaffolding and formwork; this method of closure requires a long construction time in the central median, and the impact period on the current traffic is correspondingly extended.

[0006] ② Prefabricated upper structure to close the gap in the central dividing strip; this closing method requires prefabrication of the upper slab beams in the prefabrication yard in advance, and then transportation to the structure that needs to be closed for erection. This method is greatly affected by the prefabrication yard and needs to be implemented after the construction of the prefabrication yard is completed; in addition, because the prefabricated slab beams also need to be transported to the site, the overall situation is also greatly restricted by the transportation channel of the slab beams. Construction cannot be carried out until the slab beams are prefabricated and in place.

[0007] The above-mentioned problems lead to many problems in the current central median gap closure plan, slow construction speed, long construction period, and great impact on on-site traffic, especially in the early stage of the project, affected by the prefabrication site and traffic maintenance, and there are certain difficulties in construction. Utility Model Content

[0008] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a force-bearing structure for ensuring the passage of the central dividing strip of a closed bridge, so as to conveniently and quickly achieve the purpose of closing the gap in the central dividing strip.

[0009] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0010] A load-bearing structure for ensuring the passage of a central dividing strip of a closed bridge, comprising a support beam arranged in a gap between a first bridge body and a second bridge body, wherein the length direction of the support beam is arranged along the length direction of the first bridge body, and both ends of the support beam in the length direction are supported, and the upper surface of the support beam is flush with the upper surface of the hollow slabs on the end sides of the first bridge body and the second bridge body, connecting steel bars and / or steel meshes are laid above the hollow slabs on the end sides of the first bridge body and the second bridge body and above the support beam, and a concrete layer is cast above the hollow slabs on the end sides of the first bridge body and the second bridge body and above the support beam, and the concrete layer covers the connecting steel bars and / or steel meshes.

[0011] In the highway construction structure as described above, support beams are erected below the gaps between the bridge bodies on both sides of the expressway, reducing the impact of construction on the bridge bodies on the road. The support beams facilitate the construction of cast-in-place concrete layers on site, ensuring the structural strength of the cast-in-place concrete layers and reliable connection with the bridge bodies on both sides. The site is supported by support beams, with only some processes being carried out on the bridge deck, making construction convenient as a whole and shortening the construction period. The construction of connecting steel bars and / or steel meshes can be carried out between the bridge bodies on both sides. Since the overall construction period is shortened, the impact on highway traffic is shorter.

[0012] As described above, a load-bearing structure for ensuring the passage of the central dividing strip of a closed bridge, the supporting beams include a plurality of I-shaped steel beams, which are arranged in contact with each other between two adjacent I-shaped steel beams along the width direction of the first bridge body. Thus, the existing I-shaped steel beams are spliced ​​in the gap between the bridge bodies on both sides, which is equivalent to supporting the bottom of the subsequent cast-in-place concrete layer, facilitating the pouring of the concrete layer and ensuring the structural strength of the concrete layer.

[0013] In the load-bearing structure for maintaining the central dividing strip of a closed bridge as described above, the height of the support beam is 50-65 cm to ensure stable support for a cast-in-place concrete layer of a set length and width, such as 3 m.

[0014] As described above, a load-bearing structure for maintaining the central dividing strip of a closed bridge is provided with two layers of connecting steel bars to further enhance the structural strength of the cast-in-place concrete layer. The first layer of connecting steel bars is located above the hollow slabs on the end sides of the first bridge body and the second bridge body and the upper surface of the supporting beam, and the second layer of connecting steel bars is arranged higher than the first layer of connecting steel bars.

[0015] As described above, in a load-bearing structure for maintaining the central dividing strip of a closed bridge, the steel mesh is provided with two layers, one layer of the steel mesh is located above the first layer of connecting steel bars, and the other layer of the steel mesh is located below the second layer of connecting steel bars.

[0016] As described above, in a load-bearing structure for maintaining the central dividing strip of a closed bridge, a plurality of connecting steel bars are provided in each layer, and each connecting steel bar is arranged along the longitudinal direction of the first bridge body or the second bridge body.

[0017] As described above, a load-bearing structure for ensuring the passage of the central dividing strip of a closed bridge, wherein the two ends of the support beam in the length direction are supported by abutment caps respectively, and the two ends of the support beam in the length direction are supported by the abutment caps to ensure that the support beam is stably supported;

[0018] As described above, a load-bearing structure for ensuring the passage of the central dividing strip of a closed bridge, the abutment cap is used to support the cap beam corresponding to the first bridge body or the second bridge body, and the end side of the cap beam is usually arranged beyond the first bridge body or the second bridge body, and the supporting beam is supported by the end side of the cap beam.

[0019] As described above, a load-bearing structure for ensuring the passage of the central dividing strip of a closed bridge also includes a cement pouring truck, whose pipeline crosses the first bridge body or the second bridge body, and pours concrete above the hollow slabs on the end sides of the first bridge body and the second bridge body and above the support beam to form the concrete layer.

[0020] In the load-bearing structure for maintaining the central dividing strip of a closed bridge as described above, the concrete layer has a set thickness, and the upper surface of the concrete layer is flush with the upper surface of the asphalt layer of the existing passage.

[0021] The beneficial effects of the above utility model are as follows:

[0022] 1) The utility model sets up support beams below the gaps between the bridge bodies on both sides of the expressway, thereby reducing the impact of construction on the bridge bodies on the road. The support beams facilitate the construction of cast-in-place concrete layers on site, thereby ensuring the structural strength of the cast-in-place concrete layers and reliable connection with the bridge bodies on both sides. The support beams are used on site for support, and there is no need to wait for the manufacture of precast panels. Only some processes are carried out on the bridge deck, which facilitates the overall construction and shortens the construction period. The construction of connecting steel bars and / or steel meshes can be carried out between the bridge bodies on both sides. Since the overall construction period is shortened, the impact on highway traffic is shorter.

[0023] 2) The support beam in the utility model includes a plurality of I-shaped steel beams. The I-shaped steel beams have high structural strength and are convenient to erect and obtain materials. They have little impact on the construction progress. Moreover, the I-shaped steel beams are spliced ​​in the gap between the bridge bodies on both sides, which is equivalent to supporting the bottom of the subsequent cast-in-place concrete layer, which is beneficial to the pouring of the concrete layer and ensures the structural strength of the concrete layer.

[0024] 3) In the utility model, the support beam is supported by the abutment cap. The stable structure of the abutment cap is conducive to the support of the support beam. Moreover, the abutment cap is a structure for supporting the bridge body. There is no need to build scaffolding and other structures on site, which is convenient for construction and fast and reliable support of the support beam.

[0025] 4) The utility model is provided with a cement pouring vehicle, and the pipeline of the cement pouring vehicle is relatively long, and the pipeline can cross the first bridge body or the second bridge body to pour concrete above the hollow slabs at the end sides of the first bridge body and the second bridge body and above the support beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0027] Figure 1 It is a schematic diagram of the bridge bodies on both sides in the prior art.

[0028] Figure 2 It is a cross-sectional schematic diagram of the setting of a support beam in a load-bearing structure for ensuring the passage of a central dividing strip of a closed bridge according to one or more embodiments of the utility model.

[0029] Figure 3 It is a schematic diagram of a concrete layer cast on the surface of a supporting beam in a load-bearing structure for maintaining the passage of a central dividing strip of a closed bridge according to one or more embodiments of the utility model.

[0030] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0031] Among them: 1. Column, 2. Base, 3. First bridge body, 4. Second bridge body, 5. Support beam, 51. I-beam steel beam, 6. Connecting steel bars, 7. Steel mesh, 8. Concrete layer, 9. Hollow slab. DETAILED DESCRIPTION

[0032] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or their combinations;

[0034] As introduced in the background technology, the existing technology has the problem of long construction time for the central dividing strip. In order to solve the above technical problem, the utility model proposes a force-bearing structure for ensuring the passage of the central dividing strip of a closed bridge.

[0035] In a typical implementation of the present invention, reference is made to Figure 2 As shown, a load-bearing structure for ensuring the passage of the central dividing strip of a closed bridge includes a support beam 5 arranged in the gap between the first bridge body 3 and the second bridge body 4, the length direction of the support beam 5 is arranged along the length direction of the first bridge body 3, both ends of the support beam 5 in the length direction are supported, the upper surface of the support beam 5 is flush with the upper surface of the hollow slabs 9 on the end sides of the first bridge body 3 and the second bridge body, connecting steel bars and / or steel meshes are laid above the hollow slabs on the end sides of the first bridge body 3 and the second bridge body 4 and above the support beam, and a concrete layer is cast above the hollow slabs on the end sides of the first bridge body and the second bridge body and above the support beam, and the concrete layer covers the connecting steel bars and / or steel meshes.

[0036] Among them, it needs to be explained that reference Figure 1 As shown, columns 1 are provided on one side of the first bridge body 3 and the second bridge body 4 close to the gap therebetween, the columns 1 support railings, and a base 2 is provided at the bottom of the columns 1. After removing the base 2 and the columns 1, a portion of the upper surface of the hollow slabs 9 on the end sides of the first bridge body 3 and the second bridge body 4 is exposed, and then the construction of the central dividing zone of the bridge is carried out, so that the subsequently poured concrete layer 8 can connect the gap between the bridge bodies on both sides and the bridge bodies on both sides to ensure the strength after closure.

[0037] In this embodiment, the support beam 5 includes a plurality of I-shaped steel beams 51, which are arranged in contact with each other along the width direction of the first bridge body 3. This provides better support for the bottom of the poured concrete layer 8. The existing I-shaped steel beams are spliced ​​in the gap between the bridge bodies on both sides, which is equivalent to supporting the bottom of the subsequent cast-in-place concrete layer, facilitating the pouring of the concrete layer and ensuring the structural strength of the concrete layer.

[0038] It is easy to understand that the height of the support beam 5 is 50-65 cm to ensure stable support for a cast-in-place concrete layer of a set length and width, such as 3 m.

[0039] In order to further enhance the structural strength of the cast-in-place concrete layer, two layers of connecting steel bars 6 are provided. The first layer of connecting steel bars is located above the upper surface of the hollow slabs and support beams at the ends of the first bridge body and the second bridge body, and the second layer of connecting steel bars is arranged higher than the first layer of connecting steel bars.

[0040] It can be understood that a plurality of connecting steel bars 6 are provided in each layer, and a distance is set between two adjacent connecting steel bars in each layer, and each connecting steel bar is arranged along the longitudinal direction (length direction) of the first bridge body or the second bridge body.

[0041] Regarding the steel mesh, the steel mesh 7 is provided with two layers, one layer of steel mesh is located above the first layer of connecting steel bars and contacts the first layer of connecting steel bars, and the other layer of steel mesh is located below the second layer of connecting steel bars and contacts the second layer of connecting steel bars.

[0042] It should be noted that in order to realize the erection of the support beam, the two ends of the support beam 5 in the length direction are supported by the abutment caps respectively, and the two ends of the support beam in the length direction are supported by the columns to ensure that the support beam is stably supported.

[0043] It needs to be explained that the abutment cap is used to support the corresponding cap beam under the first bridge body or the second bridge body. The end side of the cap beam is usually arranged beyond the first bridge body or the second bridge body, and the end of the supporting beam is supported by the end side of the cap beam.

[0044] Among them, the cap beam refers to the crossbeam set on the top of the frame pile pier to support, distribute and transfer the load of the superstructure.

[0045] In addition, the highway construction structure also includes a cement pouring vehicle. The cement pouring vehicle adopts a cement pouring vehicle in the prior art. The cement pouring vehicle can travel under the bridge body, and the cement pouring vehicle has a long pipeline. The pipeline of the cement pouring vehicle spans the first bridge body or the second bridge body, and pours concrete above the hollow slabs at the ends of the first bridge body and the second bridge body and above the support beam to form a concrete layer 8 with a set height. Figure 3 As shown, the concrete layer 8 covers the hollow slabs 9 at the ends of the first bridge body 3 and the second bridge body 4, so the width of the concrete layer 8 is greater than the width between the bridge bodies on both sides, and the height of the concrete layer 8 is the same as the existing channel cast-in-place integrated layer and asphalt layer.

[0046] It needs to be explained that the highway construction structure provided in this embodiment is applicable to bridge bodies with the same height on both sides of the central dividing strip to be connected by bridge bodies on both sides.

[0047] The highway construction structure provided in this embodiment is to erect support beams below the gaps between the bridge bodies on both sides of the highway, thereby reducing the impact of construction on the bridge bodies on the road. The support beams facilitate the construction of cast-in-place concrete layers on site, thereby ensuring the structural strength of the cast-in-place concrete layers and reliable connection with the bridge bodies on both sides. The support beams are used on site for support, with only some processes being carried out on the bridge deck, which facilitates overall construction and shortens the construction period. The construction of connecting steel bars and / or steel meshes can be carried out between the bridge bodies on both sides, and since the overall construction period is shortened, the impact on highway traffic is shorter. After the road maintenance is completed, the support beams and the cast-in-place concrete layers are uniformly dismantled.

[0048] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A force-bearing structure for maintaining the central dividing strip of a closed bridge, characterized in that: It includes a supporting beam arranged in the gap between the first bridge body and the second bridge body, the length direction of the supporting beam is arranged along the length direction of the first bridge body, both ends of the supporting beam in the length direction are supported, the upper surface of the supporting beam is flush with the upper surface of the hollow slabs on the end sides of the first bridge body and the second bridge body, connecting steel bars and / or steel meshes are laid above the hollow slabs on the end sides of the first bridge body and the second bridge body and above the supporting beam, and a concrete layer is cast above the hollow slabs on the end sides of the first bridge body and the second bridge body and above the supporting beam, and the concrete layer covers the connecting steel bars and / or steel meshes.

2. A force-bearing structure for maintaining the central dividing strip of a closed bridge according to claim 1, characterized in that: The support beams include a plurality of I-shaped steel beams, which are arranged in contact with each other between two adjacent I-shaped steel beams along the width direction of the first bridge body.

3. The force-bearing structure for maintaining the central dividing strip of a closed bridge according to claim 1, characterized in that: The height of the support beam is 50-65 cm.

4. The force-bearing structure for maintaining the central dividing strip of a closed bridge according to claim 1, characterized in that: The connecting steel bars are provided with two layers, the first layer of connecting steel bars is located above the hollow slabs at the ends of the first bridge body and the second bridge body and the upper surface of the supporting beam, and the second layer of connecting steel bars is provided higher than the first layer of connecting steel bars.

5. The force-bearing structure for maintaining the central dividing strip of a closed bridge according to claim 4, characterized in that: The steel mesh is provided with two layers, one layer of the steel mesh is located above the first layer of connecting steel bars, and the other layer of the steel mesh is located below the second layer of connecting steel bars.

6. The force-bearing structure for maintaining the central dividing strip of a closed bridge according to claim 4, characterized in that: There are multiple connecting steel bars in each layer, and each connecting steel bar is arranged along the longitudinal direction of the first bridge body or the second bridge body.

7. The force-bearing structure for maintaining the central dividing strip of a closed bridge according to claim 1, characterized in that: Both ends of the support beam in the length direction are supported by abutment caps respectively.

8. The force-bearing structure for maintaining the central dividing strip of a closed bridge according to claim 7, characterized in that: The abutment cap is used to support the cap beam corresponding to the first bridge body or the second bridge body.

9. The force-bearing structure for maintaining the central dividing strip of a closed bridge according to claim 1, characterized in that: It also includes a cement pouring vehicle, the pipeline of which spans over the first bridge body or the second bridge body, and pours concrete above the hollow slabs on the end sides of the first bridge body and the second bridge body and above the support beam to form the concrete layer.

10. The force-bearing structure for maintaining the central dividing strip of a closed bridge according to claim 1, characterized in that: The concrete layer has a set thickness, and the upper surface of the concrete layer is flush with the upper surface of the existing channel asphalt layer.

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