A novel protective structure for precast slabs with post-pouring strips

Abstract

This invention provides a novel protective structure for precast slabs with post-cast strips, comprising multiple annular steel rings for fixing. Within each annular steel ring are multiple main frames connected to it. The upper main frame is connected to an upper annular hook, and the lower main frame is connected to a lower annular hook. The multiple main frames and annular steel rings form a stable steel structure, providing tensile strength for the protective structure. Concrete blocks are poured around the outer areas of the main frames and annular steel rings to protect them, thus providing a solid protective structure. The lower hooks contact the steel structure of the precast slab. This invention can be applied to the construction of post-cast strips in concrete structures. It is convenient to construct, simple to operate, economical and efficient, effectively utilizing on-site steel reinforcement and concrete while protecting the post-cast strip area. It improves the construction speed of the work surface and reduces interference between different professional trades, thereby improving the overall construction efficiency and quality of the post-cast strip area.

Description

Technical Field

[0001] This utility model relates to the field of building protection, specifically to a novel protective structure for precast slabs with post-cast strips. Background Technology

[0002] The statements herein provide only background information related to this utility model and do not necessarily constitute prior art. With the increasing maturity of concrete structure construction technology, the quality requirements for concrete construction are also becoming increasingly stringent, especially for commercial housing, important public buildings, or projects striving for excellence. These projects place higher demands on the quality of concrete structure construction. Post-cast strips are temporary strip-shaped joints left during the construction of cast-in-place reinforced concrete structures to absorb settlement and shrinkage deformation. After certain conditions are met, they are then filled with concrete to make the structure a continuous whole. Their main functions include: resolving settlement differences: in high-rise buildings and podiums, and at the connection between new and old buildings, post-cast strips release settlement differences, preventing structural damage due to uneven settlement; reducing temperature shrinkage cracks: in ultra-long structures, post-cast strips can release temperature stress and concrete shrinkage stress, preventing structural cracking. Protecting the reinforcing steel in the post-pouring strip is a crucial step in construction. Therefore, after the reinforcing steel is tied and before concrete pouring, it is necessary to protect the reinforcing steel and waterstop structures in the post-pouring strip area to prevent damage during subsequent construction processes. This ensures the quality of the concrete construction in the post-pouring strip area and effectively improves the overall construction quality. Since the post-pouring strip is usually poured late, the reinforcing steel is exposed for a long time, making it prone to rust and corrosion, affecting the bond strength with the concrete, structural durability, and construction interference. During construction, debris easily accumulates in the post-pouring strip; if not cleaned promptly, this will affect the quality of subsequent construction.

[0003] Existing protective measures typically involve the use of water-stop steel plates, but their construction is complex and prone to causing steel bar deformation and twisting due to collisions, as well as the risk of prolonged exposure and injury to construction workers. Utility Model Content

[0004] The main purpose of this utility model is to provide a protective structure for the precast slab with post-pouring strip.

[0005] To achieve the above objectives, a novel protective structure for precast slabs with post-cast strips includes multiple annular steel rings for fixing. Multiple main frames connected to the annular steel rings are arranged within the rings. The upper main frame is connected to an upper annular hook, and the lower main frame is connected to a lower annular hook. The multiple main frames and annular steel rings form a stable steel structure, providing tensile strength for the protective structure. Concrete blocks are poured into the outer areas of the main frames and annular steel rings to protect the main frames and annular steel rings, thus creating a solid protective structure. The lower hooks contact the steel structure of the precast slab.

[0006] The solidified components are then joined together to form a large protective layer.

[0007] Furthermore, connecting blocks are integrally formed on both sides of the concrete block, with the connecting blocks on both sides located at two opposite corners.

[0008] Furthermore, lightweight blocks are filled between the two main frames, and these lightweight blocks are placed inside the concrete blocks to reduce the weight of the entire device.

[0009] Furthermore, the angle between the lower hook and the main frame is 20 to 60 degrees.

[0010] Furthermore, a connecting unit is also connected to the lower hook, which is used to limit the lateral displacement of the concrete block on the precast slab.

[0011] Furthermore, the connecting unit includes a guide ring that can be slidably fitted onto the lower hook. A limiting box is welded to one side of the guide ring. An execution hole for accommodating threaded steel is provided at the bottom of the limiting box. A volume box is also connected inside the execution hole. Multiple elastic components are connected inside the volume box. A movable plate is fixedly connected to the other end of the elastic components. The movable plate is slidably fitted inside the volume box. The movable plate is sealed to the inner wall of the volume box. Multiple contact rods that penetrate the limiting box and extend into the execution hole are also fixedly connected to the bottom of the movable plate. A sleeve is connected to one side of the volume box. A clamping plate is connected to the movable end of the sleeve. The center of the circle of the clamping plate is not at the same point as the center of the execution hole. When the clamping plate moves, it eccentrically clamps the threaded steel.

[0012] Furthermore, a rubber sheet is fixedly connected to the inner wall of the clamping plate, and the rubber sheet is provided with a threaded groove that matches the thread of the rebar.

[0013] Furthermore, multiple balls are rolled and embedded inside the guide ring, and a contact ball is rolled and embedded at the top of the contact rod.

[0014] The beneficial effects of this utility model are reflected in:

[0015] This invention can be applied to the construction of post-cast strips in concrete structures. It is convenient to construct, simple to operate, economical and efficient. It can effectively utilize on-site steel bars and concrete, while protecting the post-cast strip area. It improves the construction speed of the working surface and reduces interference between different professional trades, thereby improving the overall construction efficiency and quality of the post-cast strip area. It can also adapt to the protection of post-cast strips at different positions and angles, ensuring the implementation of protective work. Attached Figure Description

[0016] In the attached diagram:

[0017] Figure 1 This is a three-dimensional structural view of the present invention.

[0018] Figure 2 This is a partial three-dimensional structural diagram of Example 1;

[0019] Figure 3 This is a three-dimensional structural diagram of the steel structure in Example 1;

[0020] Figure 4 This is a partial front view of the cut-out in Embodiment 1;

[0021] Figure 5 This is a partial front view of the cut-out in Example 2;

[0022] Figure 6 This is a three-dimensional structural diagram of the steel structure in Example 3;

[0023] Figure 7 This is a partial front view of the cut-out in Example 4;

[0024] Figure 8 This is a partial front view of the three-dimensional structure of the connecting unit diagram;

[0025] Figure 9 This is a partial side view of the three-dimensional structure of the connecting unit diagram.

[0026] Explanation of reference numerals in the attached figures:

[0027] 01. Concrete block; 02. Upper hook; 04. Lower hook; 05. Connecting block; 06. Main frame; 07. Ring steel; 11. Lightweight block; 20. Connecting unit; 21. Guide ring; 22. Limiting box; 23. Volume box; 24. Moving plate; 25. Sleeve; 26. Clamping plate; 27. Rubber sheet; 28. Contact rod; 29. ​​Actuation hole; 30. Elastic component. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the utility model without creative effort are within the scope of protection of the utility model.

[0029] Example 1: See Figures 1 to 4 ;

[0030] This utility model discloses a novel protective structure for precast slabs with post-cast strips, comprising multiple annular steel bars 07 for fixing. Multiple main frames 06 are connected to the annular steel bars 07 within their rings. The annular structure of the annular steel bars 07 cooperates with the main frames 06, and steel wires are used to bind the annular steel bars 07 to the main frames 06. The multiple main frames 06 and annular steel bars 07 form a stable steel structure. The upper main frame 06 is connected to an annular upper hook 02, and the lower main frame 06 is connected to an annular lower hook 04. The upper hook 02 and lower hook 04 have the same shape and structure, so there is no distinction between the upper and lower parts. The vertical angle of the lower hook 04 relative to the main frame 06 is 20-60 degrees. When the lower hook 04 is at the bottom, it contacts the steel structure of the precast slab. The device deforms and snaps into the steel structure of the precast slab, limiting vertical displacement and connecting the device to the steel structure within the post-cast strip of the precast slab. The top hook 02 can be used to subsequently attach other hoisting devices, which restricts the movement of the device and provides tensile strength for the protective structure. Concrete blocks 01 are poured on the outer areas of the main frame 06 and the ring steel 07. The concrete blocks 01 are used to protect the main frame 06 and the ring steel 07, while providing a solid protective structure. The concrete blocks 01 are solid concrete blocks made from leftover concrete on site (the internal structure is shown in the attached figure, which has been hollowed out), achieving reasonable and effective use of concrete. The bottom hook 04 contacts the steel structure of the precast slab. Multiple concrete blocks 01, after curing, are spliced ​​together to form a large area of ​​protection.

[0031] In one embodiment, connecting blocks 05 are integrally formed on both sides of the concrete block 01. The connecting blocks 05 on both sides are located at two opposite corners. The two connecting blocks 05 at the opposite corners allow the longitudinally arranged concrete blocks 01 to be connected in sequence, so that the precast slab is stably protected.

[0032] Example 2: Figures 1-5 As shown, the difference between this embodiment and Embodiment 1 lies in the different filling material inside the concrete block 01;

[0033] In this embodiment, lightweight blocks 11 are filled between the two sets of main frames 06. The lightweight blocks 11 are set inside the concrete blocks 01 to reduce the weight of the entire device. By filling the main frames 06 and other locations with lightweight blocks 11, the overall weight of the device can be reduced, achieving lightweight production, facilitating manual assembly and disassembly, and without compromising the protective effect.

[0034] Example 3: Figures 1-3 and Figure 6As shown, the difference between this embodiment and Embodiment 1 is that the angle of the lower hook 04 is different; in this embodiment, the angle of the lower hook 04 relative to the main frame 06 is 20~60 degrees. By setting the lower hook 04 at an angle, it is convenient for the lower hook 04 to be inserted into the steel structure of the precast slab, which can adapt to a certain tilt angle error.

[0035] Example 4: Figure 1-3 and Figures 7-9 As shown, the difference between this embodiment and Embodiment 1 lies in the connection method between the lower hook 04 and the steel structure;

[0036] In this embodiment, a connecting unit 20 is also connected to the lower hook 04. The connecting unit 20 is used to limit the lateral displacement of the concrete block 01 on the precast slab. Through the connecting unit 20, the lower hook 04 can contact the threaded steel on the lateral precast slab, limiting the movement of the device on the vertical precast slab, and can adapt to protection on a certain slope.

[0037] In the four embodiments, the connecting unit 20 includes a guide ring 21 that can be slidably fitted onto the lower hook 04. The guide ring 21 is fitted onto the lower hook 04 before the lower hook 04 and the main frame 06 are installed, thus completing the installation. A limiting box 22 is welded to one side of the guide ring 21. The bottom of the limiting box 22 is provided with an execution hole 29 for accommodating the threaded steel. The guide ring 21 can move along the trajectory of the lower hook 04 under the action of external force, further driving the movement of the limiting box 22. The space of the execution hole 29 is similar in size to the diameter of the threaded steel. A volume box 23 is also connected inside the execution hole 29. Multiple elastic components 30 are connected inside the volume box 23. The other end of the elastic component 30 is fixedly connected to a moving plate 24. The moving plate 24 is slidably fitted into the volume box 23 and moves... Plate 24 is sealed to the inner wall of volume box 23. Multiple contact rods 28 are fixedly connected to the bottom of the movable plate 24, penetrating the limiting box 22 and extending into the execution hole 29. After the threaded steel contacts the contact rods 28, it squeezes the contact rods 28 to move towards the volume box 23, thereby squeezing the movable plate 24 to move inward, so that the space on one side of the volume box 23 is reduced, and the liquid in the volume box 23 can flow. A sleeve 25 is connected to one side of the volume box 23. The movable end of the sleeve 25 is connected to a clamping plate 26. The clamping plate 26 is semi-circular and its center is not at the same point as the execution hole 29. The liquid in the volume box 23 is squeezed into the sleeve 25, so that the movable end of the sleeve 25 drives the clamping plate 26 to move. When the clamping plate 26 moves, it eccentrically clamps the threaded steel.

[0038] In the four embodiments, a rubber sheet 27 is also fixedly connected to the inner wall of the clamping plate 26. The rubber sheet 27 is provided with a threaded groove that matches the thread of the threaded steel bar. The rubber sheet 27 can flexibly contact the threaded steel bar, while adapting to a certain error and increasing friction to ensure the stability of clamping.

[0039] In the four embodiments, a plurality of balls are rolled and embedded in the guide ring 21, and a contact ball is rolled and embedded at the top of the contact rod 28. The balls and contact balls can reduce friction during contact and ensure the movement of each device.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

[0041] It should be noted that if the utility model embodiment involves directional indicators (such as up and down), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0042] Furthermore, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, if the utility model embodiments involve descriptions of "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the utility model.

Claims

1. A novel protective structure for precast slabs with post-cast strips, characterized in that, It includes multiple ring steels (07) for fixing, and multiple main frames (06) connected to the ring steels (07) are arranged inside the ring. The main frames (06) are divided into upper and lower layers. The upper main frame (06) is connected to the ring upper hook (02), and the lower main frame (06) is connected to the ring lower hook (04). The multiple main frames (06) and ring steels (07) form a stable steel structure, providing tensile strength for the protective structure. The outer areas of the main frames (06) and ring steels (07) are filled with concrete blocks (01). The concrete blocks (01) are used to protect the main frames (06) and ring steels (07) and at the same time obtain a solid protective structure. The lower hook (04) is in contact with the steel structure of the precast slab. Among them, multiple solidified concrete blocks (01) are spliced ​​together to form a large-area protective layer.

2. The novel protective structure for post-cast strip precast slabs according to claim 1, characterized in that, Both sides of the concrete block (01) are integrally formed with connecting blocks (05), and the connecting blocks (05) on both sides are set at two opposite corners. The connecting blocks (05) are used for splicing between two concrete blocks (01).

3. The novel protective structure for post-cast strip precast slabs according to claim 1, characterized in that, The space between the two sets of main frames (06) is filled with lightweight blocks (11), which are placed inside the concrete blocks (01) to reduce the weight of the entire device.

4. The novel protective structure for post-cast strip precast slabs according to claim 1, characterized in that, The vertical angle between the lower hook (04) and the main frame (06) is 20 to 60 degrees.

5. The novel protective structure for post-cast strip precast slabs according to claim 1, characterized in that, The lower hook (04) is also connected to a connecting unit (20), which is used to limit the lateral displacement of the concrete block (01) on the precast slab.

6. The novel protective structure for post-cast strip precast slabs according to claim 5, characterized in that, The connecting unit (20) includes a guide ring (21) that can be slidably fitted onto the lower hook (04). A limiting box (22) is welded to one side of the guide ring (21). The bottom of the limiting box (22) is provided with an execution hole (29) for accommodating threaded steel. A volume box (23) is also connected inside the execution hole (29). Multiple elastic components are connected inside the volume box (23). A movable plate (24) is fixedly connected to the other end of the elastic components. The movable plate (24) is slidably fitted into the volume box (23). The plate (24) is sealed to the inner wall of the volume box (23). The bottom of the movable plate (24) is also fixedly connected to a plurality of contact rods (28) that penetrate the volume box (23) and extend into the execution hole (29). The side of the volume box (23) away from the contact rods (28) is connected to a sleeve (25). The movable end of the sleeve (25) is connected to a clamping plate (26). The clamping plate (26) is semi-circular in shape and is not at the same point as the center of the execution hole (29). When the clamping plate (26) moves, it eccentrically clamps the threaded steel.

7. A novel protective structure for post-cast strip precast slabs according to claim 6, characterized in that, The inner wall of the clamping plate (26) is also fixedly connected to a rubber sheet (27), and the rubber sheet (27) is provided with a thread groove that matches the thread of the rebar.

8. A novel protective structure for post-cast strip precast slabs according to claim 6, characterized in that, Multiple balls are rolled and embedded in the guide ring (21), and a contact ball is rolled and embedded at the top of the contact rod (28).

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