Post-cast strip steel bar protection structure

Abstract

The invention relates to a post-cast strip steel bar protection structure which comprises pre-cast structures arranged on the two sides of a post-cast strip and further comprises a steel bar and a protection sleeve. Wherein the steel bar is arranged in the post-cast strip, the steel bar extends in the width direction of the post-cast strip, and the two ends of the steel bar are pre-buried in pre-cast structures on the two sides of the post-cast strip; the protective sleeve is arranged on the steel bar in a sleeving mode, and the two ends of the protective sleeve are pre-embedded into a pre-pouring structure by a preset length. According to the post-cast strip steel bar protection structure provided by the invention, the protection sleeve sleeves the steel bar of the post-cast strip, and the two ends of the sleeve are pre-buried in the pre-cast structure, so that the reserved steel bar of the post-cast strip can be prevented from being exposed in the environment for a long time, and the steel bar is prevented from being corroded by water vapor and rainwater and being corroded by construction pollution. The post-cast strip steel bar protection structure is simple in structure, convenient to construct, low in manufacturing cost and remarkable in protection effect, and the engineering quality is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and more particularly to a post-cast strip steel bar protection structure. Background Art

[0002] In industrial and civil construction, post-cast joints are a key component in addressing structural settlement and shrinkage. Traditionally, these joints are exposed to the elements for extended periods, often leading to the following challenges: Exposed rebar is susceptible to erosion by moisture, rainwater, and construction pollution, leading to rust and impacting project quality and structural durability; Corroded rebar in post-cast joints requires manual derusting or replacement, increasing both the complexity and project timeline costs; and rusted rebar can lead to structural failure during inspection, reducing first-pass acceptance rates.

[0003] Existing protective measures (such as temporary coverings) are easily detached and cannot completely isolate corrosive media, resulting in limited effectiveness. Therefore, there is an urgent need for a simple, low-cost device that can achieve long-term and effective protection of post-cast steel bars to ensure structural quality and durability. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a post-cast steel bar protection structure, aiming to solve the problems existing in the prior art.

[0005] The present invention provides a post-cast strip steel bar protection structure, comprising a pre-cast structure arranged on both sides of the post-cast strip, which also includes steel bars and a protective sleeve; wherein, The steel bars are arranged in the post-cast strip, the steel bars are extended along the width direction of the post-cast strip, and both ends of the steel bars are pre-buried in the pre-cast structure on both sides of the post-cast strip; The protective sleeve is sleeved on the steel bar, and both ends of the protective sleeve are pre-embedded in the pre-cast structure with a preset length.

[0006] Preferably, the inner diameter of the protective sleeve is 1 mm to 5 mm larger than the diameter of the steel bar.

[0007] Preferably, the length of the protective sleeve is greater than the width of the post-cast strip by 60 mm to 100 mm.

[0008] Preferably, the protective sleeve is a PVC sleeve.

[0009] Preferably, the wall thickness of the PVC sleeve is 1 mm to 1.5 mm.

[0010] Preferably, a plurality of the steel bars are provided in the post-cast strip, and the plurality of the steel bars are distributed in two layers at intervals in an upper and lower manner, and the plurality of the steel bars in each layer are evenly distributed and arranged along the length direction of the post-cast strip.

[0011] Preferably, it further comprises a building waterproof layer, which is arranged on one side of the post-cast strip and the pre-cast structure.

[0012] Preferably, the building waterproof layer is a waterproof membrane.

[0013] Preferably, it also includes a waterstop steel plate, which is extended along the width direction of the post-cast strip, half of the waterstop steel plate in the width direction is embedded in the pre-cast structure, and the other half of the waterstop steel plate in the width direction is located in the post-cast strip.

[0014] Preferably, the waterstop steel plate is arranged in the middle position in the height direction of the post-cast strip.

[0015] The post-cast strip reinforcement protection structure provided by the present invention protects the steel bars in the post-cast strip by installing protective sleeves over them and pre-embedding the sleeves' ends in the pre-cast structure. This prevents the steel bars in the post-cast strip from being exposed to the environment for a long time, thus protecting them from corrosion caused by moisture, rainwater, and construction pollution. This post-cast strip reinforcement protection structure boasts a simple structure, convenient construction, low production cost, and significant protective effectiveness, significantly improving project quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0017] Figure 1 A schematic front view of a post-cast strip reinforcement protection structure according to an embodiment of the present invention is shown.

[0018] Figure 2 A schematic top view of a post-cast strip reinforcement protection structure according to an embodiment of the present invention is shown.

[0019] In the figure: 1. Steel bars; 2. Protective casing; 3. Waterstop steel plate; 4. Building waterproof layer. DETAILED DESCRIPTION

[0020] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, identical elements are represented by identical or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.

[0021] The present invention provides a post-cast steel bar protection structure, see Figure 1 and Figure 2The post-cast strip steel bar protection structure includes a pre-cast structure arranged on both sides of the post-cast strip, and also includes a steel bar 1 and a protective sleeve 2; wherein, the steel bar 1 is arranged in the post-cast strip, the steel bar 1 is extended along the width direction of the post-cast strip, and the two ends of the steel bar 1 are pre-buried in the pre-cast structure on both sides of the post-cast strip; the protective sleeve 2 is sleeved on the steel bar 1, and the two ends of the protective sleeve 2 are pre-buried in the pre-cast structure with a preset length.

[0022] Specifically, the protective sleeve 2 is placed over the steel bars 1 in the post-cast zone, effectively protecting them. It forms a protective barrier layer, preventing them from being exposed to moisture, rain, and construction pollution, which can lead to rust. Later, when pouring concrete for the post-cast zone, the protective sleeve 2 can be removed from the steel bars 1 to allow them to bond effectively with the poured concrete, improving structural strength.

[0023] The inner diameter of the protective sleeve 2 is 1mm~5mm larger than the diameter of the steel bar 1. That is, the inner diameter of the protective sleeve 2 is slightly larger than the diameter of the steel bar 1, which is convenient for the protective sleeve 2 to be installed on the steel bar 1, and does not cause a large gap between the protective sleeve 2 and the steel bar 1. The air retained between the protective sleeve 2 and the steel bar 1 is as small as possible to prevent the water vapor in the retained air from corroding the steel bar 1. In this embodiment, the inner diameter of the protective sleeve 2 is 2mm larger than the diameter of the steel bar 1. The length of the protective sleeve 2 is 60mm~100mm larger than the width of the post-cast strip. That is, the two ends of the protective sleeve 2 are respectively embedded in the pre-cast structure on both sides of the post-cast strip with a length of 30mm~50mm. The concrete of the pre-cast structure can seal the two ends of the protective sleeve 2, and will not allow water vapor, rainwater, etc. in the environment to enter the protective sleeve 2, thereby enabling the protective sleeve 2 to effectively protect the steel bar 1. The length of the end of the protective sleeve 2 embedded in the pre-cast structure should not be too long. Later, when pouring the post-cast strip concrete, the protective sleeve 2 needs to be completely removed to allow the steel bar 1 to effectively bond with the poured concrete. Pre-embedding the ends of the protective sleeve 2 in the pre-cast structure for 30mm to 50mm, respectively, ensures a reliable sealing of the ends of the protective sleeve 2 and facilitates the subsequent removal of the protective sleeve 2 embedded in the pre-cast structure. In this embodiment, the length of the protective sleeve 2 is greater than the width of the post-cast strip, which is 80mm. A length of 40mm is embedded in the pre-cast structure on both sides of the post-cast strip, respectively, at each end of the protective sleeve 2.

[0024] Preferably, the protective sleeve 2 is a PVC sleeve. Using a PVC sleeve as the protective sleeve 2 has the following advantages: the PVC sleeve has strong chemical stability, the PVC material is resistant to acid, alkali and salt corrosion, and its end is not corroded or damaged even if it is pre-buried in the alkaline cast-in-place structural concrete for a long time; the PVC sleeve is cheap, and using a PVC sleeve as the protective sleeve 2 that is sleeved on the steel bar 1 to protect the steel bar has a relatively obvious cost advantage and can reduce construction costs; the PVC sleeve is easy to chisel out, and when the post-cast strip is poured in the later stage, the PVC sleeve can be easily cut or chiseled out using a sharp tool. In order to facilitate the destructive chiseling of the PVC sleeve in the later stage, the wall thickness of the PVC sleeve should not be too large. Preferably, the wall thickness of the PVC sleeve is 1mm~1.5mm. In this embodiment, the wall thickness of the PVC sleeve is 1mm.

[0025] In this post-cast strip reinforcement protection structure, a plurality of the reinforcement bars 1 are provided in the post-cast strip, and the plurality of reinforcement bars 1 are spaced apart in two layers, with the plurality of reinforcement bars 1 in each layer being evenly spaced apart along the length of the post-cast strip. By providing the plurality of reinforcement bars 1 in the post-cast strip and dividing them into two layers, before the post-cast strip concrete is poured later, the plurality of reinforcement bars 1 reserved in the post-cast strip can serve as the main reinforcement of the reinforcement bar 1 skeleton. Transverse stirrups are tied to the plurality of reinforcement bars 1 reserved in the post-cast strip to form a reinforcement bar 1 cage skeleton structure, thereby improving the structural strength of the post-cast strip after casting.

[0026] Furthermore, the post-cast strip reinforcement protection structure further includes a building waterproof layer 4, which is arranged on one side of the post-cast strip and the pre-cast structure. By arranging the building waterproof layer 4 on one side of the post-cast strip and the pre-cast structure, a continuous and reliable anti-seepage barrier can be constructed to prevent leaking water from corroding the reinforcement 1. In this embodiment, the building waterproof layer 4 is a waterproof coil. In specific implementation, the waterproof coil is laid on the water-facing surface of the post-cast strip and the pre-cast structure, such as Figure 1 It is the post-cast strip of the basement floor. The waterproof membrane is set on the lower side of the post-cast strip and the pre-cast structure. The waterproof membrane directly resists underground water seepage and prevents erosion of the reserved steel bars 1 of the post-cast strip.

[0027] Furthermore, the post-cast strip reinforcement protection structure also includes a water-stop steel plate 3, which is extended along the width direction of the post-cast strip, and half of the water-stop steel plate 3 in the width direction is embedded in the pre-cast structure, and the other half of the water-stop steel plate 3 in the width direction is located in the post-cast strip. In this embodiment, the water-stop steel plate 3 is arranged in the middle position in the height direction of the post-cast strip. By arranging the water-stop steel plate 3 between the post-cast strip and the pre-cast structure, a rigid physical water barrier can be constructed, which solves the leakage risk at the joint between the post-cast strip and the pre-cast structure by extending the seepage path and blocking the capillary channel. In this embodiment, the water-stop steel plate 3 adopts a 3mm thick water-stop steel plate. In specific implementation, the opening groove of the water-stop steel plate 3 must face the water-facing surface, such as Figure 1 It is a post-cast strip of the basement floor, and the opening groove of the water-stop steel plate 3 is set downward.

[0028] In the post-cast zone steel bar protection structure, the protective sleeve 2 is directly sleeved on the steel bar 1 to prevent the corrosion of the steel bar by water vapor and rainwater in the environment to the greatest extent. Then, by setting the building waterproof layer 4 and the water-supporting steel plate 3, a multiple anti-seepage and water-blocking barrier is constructed to block the penetration of pressure water and capillary water, further improving the protection of the post-cast zone steel bar and slowing down the corrosion of the steel bar.

[0029] In summary, the post-cast strip reinforcement protection structure provided by the present invention, by installing a protective sleeve over the reinforcement in the post-cast strip and pre-embedding both ends of the sleeve in the pre-cast structure, can protect the reinforcement reserved in the post-cast strip from long-term exposure to the environment, thereby preventing the reinforcement from erosion by moisture, rainwater, and construction pollution that can lead to rust. This post-cast strip reinforcement protection structure has a simple structure, convenient construction, low production cost, and significant protective effect, greatly improving project quality.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0031] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A post-cast steel bar protection structure, comprising pre-cast structures arranged on both sides of the post-cast steel bar, characterized in that: Also includes steel bars and protective casing; among which, The steel bars are arranged in the post-cast strip, the steel bars are extended along the width direction of the post-cast strip, and both ends of the steel bars are pre-buried in the pre-cast structure on both sides of the post-cast strip; The protective sleeve is sleeved on the steel bar, and both ends of the protective sleeve are pre-embedded in the pre-cast structure with a preset length.

2. The post-cast steel bar protection structure according to claim 1, characterized in that: The inner diameter of the protective sleeve is 1 mm to 5 mm larger than the diameter of the steel bar.

3. The post-cast steel bar protection structure according to claim 1, characterized in that: The length of the protective sleeve is greater than the width of the post-cast strip by 60 mm to 100 mm.

4. The post-cast steel bar protection structure according to claim 1, characterized in that: The protective sleeve is a PVC sleeve.

5. The post-cast steel bar protection structure according to claim 4, characterized in that: The wall thickness of the PVC sleeve is 1 mm to 1.5 mm.

6. The post-cast steel bar protection structure according to claim 1, characterized in that: A plurality of the steel bars are arranged in the post-cast strip, and the plurality of the steel bars are divided into two layers and spaced apart from each other. The plurality of the steel bars in each layer are evenly spaced and arranged along the length direction of the post-cast strip.

7. The post-cast steel bar protection structure according to claim 1, characterized in that: It also includes a building waterproof layer, which is arranged on one side of the post-cast strip and the pre-cast structure.

8. The post-cast steel bar protection structure according to claim 7, characterized in that: The building waterproof layer is a waterproof roll.

9. The post-cast steel bar protection structure according to claim 1, characterized in that: It also includes a waterstop steel plate, which is extended along the width direction of the post-cast strip. Half of the waterstop steel plate in the width direction is embedded in the pre-cast structure, and the other half of the waterstop steel plate in the width direction is located in the post-cast strip.

10. The post-cast steel bar protection structure according to claim 9, characterized in that: The water-stop steel plate is arranged in the middle position in the height direction of the post-cast strip.

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