Post-cast strip replacing device

Abstract

The utility model provides a kind of post-pouring band support replacement device, it is related to post-pouring band construction technical field, the front and back two sides of frame beam and located the left and right sides of post-pouring band are symmetrically provided with box type steel structure transfer beam, the box type steel structure transfer beam is installed on frame beam by anchoring plate, and two box type steel structure transfer beams of same side are connected by profiled steel beam.The utility model can realize the equal strength or super strength temporary connection of post-pouring band closed front structure, reduce structural deformation, and through reasonable structure design, make support replacement device can be recycled, solve the structural feature caused by post-pouring band setting unreasonable and the post-pouring band closed front structure deformation problem.

Description

Technical Field

[0001] This utility model relates to the field of post-pouring strip construction technology, specifically a post-pouring strip support replacement device. Background Technology

[0002] During the construction of concrete structures, due to their long length, cracks can occur due to temperature changes and variations in concrete stress. Therefore, expansion joints are often installed during concrete structure construction. Under appropriate conditions, micro-expansion concrete is used to pour the concrete in these expansion joints to compensate for structural stress changes. However, the placement of expansion joints has specific requirements, such as not allowing them to pass through air-raid shelter doors or entrances, not allowing them to pass through stair treads, ensuring that expansion joints on different floors are within the same bay, placing them in areas of lower stress in beams and slabs, and limiting the spacing between them. Expansion joints are often supported by scaffolding or temporary concrete structural columns or steel columns.

[0003] Based on the above, post-cast strips are sometimes placed in unsuitable locations. Taking a project in Suqian as an example, this project is a reinforced concrete frame structure, over 160 meters long with a maximum span of 17 meters, containing an atrium-like activity space, and lacking expansion joints, making it an ultra-long structure. According to the design characteristics of the above-ground structure and foundation, the post-cast strip was placed within the atrium's side span, resulting in a single row of beams and columns plus cantilevered beams on one side of the strip. According to conventional construction methods, the cantilevered structures on both sides of the post-cast strip are only temporarily supported by formwork supports. However, in a single-row beam-column + cantilevered beam structure, the structural center of gravity of the cantilevered beams exerts a horizontal force on the columns, while the single row of columns results in a lack of constraint on the other side. As the number of floors increases, the load on the cantilevered structure continuously increases, and the horizontal force on the structural columns becomes increasingly significant. Before the post-cast strip is closed, structural deformation and displacement are highly likely. Although supporting scaffolding can prevent structural deformation to some extent, the deformation of the scaffolding itself must also be considered, and the deformation of the supporting scaffolding will further accumulate with the increase in load and number of floors.

[0004] In conclusion, minimizing structural deformation before the closure of the pouring strip after construction is of paramount importance. Utility Model Content

[0005] In view of the above-mentioned prior art, this utility model proposes a post-cast strip replacement support device to achieve equal or super-strong temporary connection of the structure before the post-cast strip is closed, reduce structural deformation, and through reasonable structural design, the replacement support device can be reused, thus solving the problem of structural deformation before the post-cast strip is closed due to unreasonable setting of the post-cast strip caused by structural characteristics.

[0006] This utility model provides a post-cast strip support replacement device, in which box-type steel structure transfer beams are symmetrically arranged on both the front and rear sides of the frame beam and on both the left and right sides of the post-cast strip. The box-type steel structure transfer beams are installed on the frame beam through anchor plates, and two box-type steel structure transfer beams on the same side are connected by steel beams.

[0007] Preferably, the anchor plate is installed on the frame beam by a plurality of through bolts.

[0008] Preferably, the box-type steel structure transfer beam is fixedly connected to the box-type steel structure transfer beam by several connecting steel plates and hexagonal bolts.

[0009] Preferably, the top of the steel beam is provided with several lifting rings.

[0010] Preferably, the box-type steel structure transfer beam is installed at 1 / 2 of the height of the frame beam, and the distance from the post-cast strip is not less than 1 / 2 of the height of the frame beam.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. The post-cast strip replacement support device provided by this utility model can realize equal or super-strong replacement support of the structure before the post-cast strip is closed, effectively reducing the deformation of the structure during construction and ensuring the stability and safety of the structure.

[0013] 2. This utility model eliminates the need for a support frame at the post-pouring strip by using equal or super-strong connections, thus solving the problem of difficult construction of support frames at the post-pouring strip in some special locations, such as the post-pouring strip support frame in ultra-high cantilever areas. At the same time, it avoids the impact of deformation of the support frame itself on structural deformation.

[0014] 3. The support replacement device of this utility model adopts a reusable design, which can be reused, reducing construction costs and improving resource utilization.

[0015] 4. The replacement support device of this utility model can be constructed using two methods: pre-embedded and post-installed. It can be flexibly selected according to different construction conditions and structural characteristics, thus enhancing the applicability of the method.

[0016] 5. Compared with traditional scaffolding support methods, the support replacement device of this utility model has high rigidity and small deformation, which can better control structural deformation. It is also convenient to install and dismantle, thus improving construction efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the post-pouring strip replacement support device in an embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram of the box-type steel structure transfer beam in an embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the steel beam in an embodiment of this utility model.

[0020] In the diagram, 1 is the frame beam; 2 is the post-cast strip; 3 is the box-type steel structure transfer beam; 4 is the anchor plate; 5 is the through bolt; 6 is the steel beam; 7 is the connecting steel plate; 8 is the hex bolt; and 9 is the lifting ring. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Example: Figure 1-3 The diagram shows a post-cast strip support replacement device. Box-type steel structure transfer beams 3 are symmetrically arranged on both the front and rear sides of the frame beam 1 and on both the left and right sides of the post-cast strip 2. The box-type steel structure transfer beams 3 are installed at 1 / 2 of the height of the frame beam 1, and the distance from the post-cast strip 2 is not less than 1 / 2 of the height of the frame beam 1. The box-type steel structure transfer beams 3 are welded to the anchor plate 4, and the anchor plate 4 is installed on the frame beam 1 by multiple through bolts 5.

[0023] Furthermore, the two box-shaped steel structure transfer beams 3 on the same side are connected by steel beams 6. The box-shaped steel structure transfer beams 3 are fixedly connected to the box-shaped steel structure transfer beams 6 by several connecting steel plates 7 and several hexagonal bolts 8. Two lifting rings 9 are provided on the top of the steel beams 6.

[0024] The post-cast strip support replacement device can be constructed using either pre-embedded or post-installed methods.

[0025] The pre-embedded type includes the following steps:

[0026] (1) Erection of post-cast strip support frame and steel structure frame: Steel structure frame is erected on both sides of frame beam 1 using reinforced concrete formwork support scaffolding, and the components of the post-cast strip support replacement device are placed on it.

[0027] (2) Installation of box-type steel transfer beams: After the reinforcement of frame beam 1 is tied, the box-type steel transfer beams 3 on both sides of frame beam 1 are pre-embedded in the reinforcement cage by through bolts 5. The box-type steel transfer beams 3 are stably connected to the through bolts 5 by anchor plates 4, and plastic sleeves are put on the through bolts 5. At this time, pay attention to the self-weight of the box-type steel transfer beams 3 to ensure that they are effectively supported.

[0028] (3) Install the steel beam: The steel beam 6 is securely connected to the box-type steel structure conversion beam 3 by connecting steel plate 7 and large hexagonal bolts 8. Since the post-cast strip replacement device has a large self-weight and the frame beam 1 is often connected to the structural slab, two lifting rings 9 are pre-embedded on the top of the steel beam 6 to facilitate the later disassembly of the post-cast strip replacement device.

[0029] (4) Install the formwork for frame beam 1.

[0030] (5) Pour concrete for frame beam 1.

[0031] The afterloading method includes the following steps:

[0032] (1) Embedded threaded sleeve: During the process of binding the reinforcing bars of frame beam 1, embedded threaded sleeves are pre-embedded inside frame beam 1 according to the design position.

[0033] (2) Install the formwork for frame beam 1.

[0034] (3) Pour concrete for frame beam 1.

[0035] (4) Erection of post-cast strip support frame and steel structure frame: Steel structure frame is erected on both sides of frame beam 1 using reinforced concrete formwork support scaffolding, and the components of the post-cast strip replacement support device are placed on it.

[0036] (5) Install the box-type steel structure transfer beam: After the concrete strength of the frame beam 1 meets the requirements, install the box-type steel structure transfer beam 3 through the screw sleeve, anchor plate 4 and through bolt 5.

[0037] (6) Install steel beams: The steel beams 6 and the box-type steel structure conversion beams 3 are securely connected by connecting steel plates 7 and large hexagonal bolts 8. Two lifting rings 9 are pre-embedded on the top of the steel beams 6 to facilitate the later disassembly of the post-cast strip replacement support device.

[0038] After the post-pouring strip is poured and the concrete strength reaches the design value, a working frame is erected. Using the pre-embedded lifting rings 9 and dismantling equipment, the post-pouring strip replacement support device is removed, cleaned, and used for the next construction section.

[0039] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent solutions made using the contents of this utility model specification, whether directly or indirectly applied to other related technical fields, are also within the patent protection scope of this utility model.

Claims

1. A post-cast strip support replacement device, characterized in that, Box-type steel structure transfer beams are symmetrically arranged on both the front and rear sides of the frame beam and on both the left and right sides of the post-cast strip. The box-type steel structure transfer beams are installed on the frame beam through anchor plates, and two box-type steel structure transfer beams on the same side are connected by steel beams.

2. The post-cast strip replacement device as described in claim 1, characterized in that, The anchor plate is installed on the frame beam by multiple through bolts.

3. The post-cast strip support replacement device as described in claim 1 or 2, characterized in that, The box-type steel structure transfer beam is fixedly connected to the box-type steel structure transfer beam by several connecting steel plates and hexagonal bolts.

4. The post-cast strip support replacement device as described in claim 1 or 2, characterized in that, The top of the steel beam is equipped with several lifting rings.

5. The post-cast strip support replacement device as described in claim 1 or 2, characterized in that, The box-type steel structure transfer beam is installed at 1 / 2 of the height of the frame beam, and the distance from the post-cast strip is not less than 1 / 2 of the height of the frame beam.

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