Construction structure of post-pouring belt joint

Abstract

The utility model provides a kind of construction structure of post-cast strip joint, it is related to the technical field of post-cast strip construction;Including close-up net, formwork, batten, floor slab bar, support frame, reinforcing bar and concrete slab;Support frame is set in the lower of formwork, for supporting formwork;Floor slab bar and reinforcing bar are all embedded in the inside of concrete slab;By setting close-up net in the two sides of post-cast strip area, and it is fixedly connected with floor slab bar and reinforcing bar, on the one hand, it can effectively block the leakage of concrete pouring on both sides, avoid the loose layer formed by slurry loss, prevent the loose layer from becoming the channel that is easy to seep water, so as to reduce the risk of leakage;On the other hand, the rough interface formed can make new and old concrete tightly engage, reduce interface gap, so that the concrete of post-cast strip area of post-casting is connected dense with concrete slab, so as to reduce the risk of hollowing.

Description

Technical Field

[0001] This utility model relates to the technical field of post-pouring strip construction, and in particular to a construction structure for post-pouring strip joints. Background Technology

[0002] Post-pouring strips are a commonly used construction technique in building engineering. Modern building engineering uses this technique to solve problems caused by temperature changes, concrete shrinkage, and uneven settlement in concrete structures. Essentially, it involves leaving temporary construction joints at corresponding locations in the foundation slab, walls, beams, and other structures, temporarily dividing the structure into several parts. Through time delay and spatial separation, the stress generated inside the concrete due to temperature changes and shrinkage is released, and then the concrete in the construction joint is poured to connect the structure into a whole.

[0003] Currently, the post-cast strips used in engineering projects have vertical joints between the old and new concrete. The post-cast strip itself is a concrete strip with the same thickness as the structural member and a width of 800mm-1000mm. The use of post-cast strips weakens the overall integrity of the structure to some extent. Therefore, the reinforcement in this area is relatively dense, and the concrete at the inside corner of the joint is almost impossible to vibrate. It relies entirely on the fluidity of the concrete itself to fill this area. As a result, there are frequent cases of rotten roots, hollow areas, and leaks at the joints between the old and new concrete. Therefore, it is necessary to provide a construction structure for post-cast strip joints to solve the above-mentioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a construction structure for post-pouring strip joints.

[0005] This utility model provides a construction structure for a post-pouring strip joint, including a sealing mesh, formwork, wooden strips, floor slab reinforcement, support frame, reinforcing steel bars, and concrete slab; The support frame is located below the template and is used to support the template; The floor slab reinforcement bars and reinforcing bars are all embedded inside the concrete slab; The closing mesh is set in the post-pouring strip area, which is the construction space reserved between concrete slabs and is located between the concrete slabs on both sides of the post-pouring strip. The wooden strips are embedded at the connection between the concrete slab and the formwork on both sides of the post-cast strip.

[0006] Preferably, it also includes a high-strength mortar layer, which fills the groove formed on the concrete slab after the wooden strips are removed.

[0007] Preferably, the outer surface of the wooden strip is coated with a release agent.

[0008] Preferably, the retaining mesh is fixedly connected to the floor slab reinforcement and reinforcing bars, and the fixed connection method is wire binding.

[0009] Preferably, the reinforcing steel bar is composed of multiple steel bars, which are arranged in a crisscross pattern.

[0010] Compared with related technologies, the construction structure of the post-pouring strip joint provided by this utility model has the following beneficial effects: 1. By setting up retaining mesh on both sides of the post-pouring strip area and fixing it to the floor slab reinforcement and reinforcing bars, it can effectively block the leakage of grout during concrete pouring on both sides, avoid the formation of a loose layer due to grout loss, and prevent the loose layer from becoming a channel for easy water seepage, thereby reducing the risk of leakage. On the other hand, the rough interface it forms can make the new and old concrete tightly bonded, reduce interface gaps, and thus make the concrete in the post-pouring strip area of ​​the post-pouring strip area tightly connected to the concrete slab, thereby reducing the risk of hollowing.

[0011] 2. The wooden strips pre-embedded at the connection between the concrete slab and the formwork, with the release agent applied to their outer surface, ensure smooth removal later. The grooves formed after removal are filled with high-strength sand to form a high-strength mortar layer, which solves the problem of root rot caused by the inability to vibrate the inside corners of the joints in traditional construction, reduces quality risks, and extends the service life of the structure.

[0012] 3. By setting reinforcing bars and embedding them together with the floor slab reinforcement inside the concrete slab, the structural strength of the post-cast strip area can be improved, the crack resistance of this part can be enhanced, thereby reducing the risk of cracking and indirectly helping to improve the anti-leakage ability.

[0013] 4. Apply release agent to the outer surface of the wooden strips in advance to prevent them from sticking to the concrete slab. This will reduce the need for forceful removal of the wooden strips and minimize damage to the concrete structure. Attached Figure Description

[0014] Fig. 1 A schematic diagram of the construction structure of the post-cast strip joint provided by this utility model when no concrete has been poured; Fig. 2 This is a schematic diagram of the overall structure of the concrete slab after molding in this utility model; Fig. 3 This is a schematic diagram of the post-pouring strip area in this utility model after casting and the removal of the template.

[0015] The following are labeled in the diagram: 1. Expansion mesh; 2. Template; 3. Timber strips; 4. Slab reinforcement; 5. Support frame; 6. Reinforcing steel bars; 7. Concrete slab; 8. High-strength mortar layer. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Example 1 Please refer to the following: Figs. 1-3 A construction structure for a post-cast strip joint includes a sealing mesh 1, a formwork 2, wooden strips 3, floor slab reinforcement 4, a support frame 5, reinforcing bars 6, and a concrete slab 7; the support frame 5 is located below the formwork 2 to support the formwork 2; the floor slab reinforcement 4 and the reinforcing bars 6 are both embedded inside the concrete slab 7; the sealing mesh 1 is located in the post-cast strip area, which is the construction space reserved between the concrete slabs 7, and is located between the concrete slabs 7 on both sides of the post-cast strip.

[0018] In the above, the support frame 5, as the core support component of the formwork 2, can provide stable vertical support for the formwork 2, preventing the formwork 2 from deforming or collapsing due to the lateral pressure of the concrete and its own weight during concrete pouring. This ensures that the thickness, flatness, and other dimensions of the concrete slab 7 after molding meet the design requirements. The floor slab reinforcement 4 is embedded inside the concrete slab 7, which can effectively improve the tensile strength and shear strength of the concrete slab 7, bear the vertical and horizontal loads generated during the use of the concrete slab 7, and ensure the foundation bearing capacity of the concrete slab 7. The closing mesh 1 is located in the post-pouring strip area between the two concrete slabs 7. When pouring the two concrete slabs 7, it can not only prevent the concrete slurry from seeping into the post-pouring strip area, preventing the defects of insufficient density such as honeycomb and pitting at the edge of the concrete slab 7 caused by slurry leakage, but also form a rough natural bonding surface on the surface where the concrete slab 7 contacts the post-pouring strip, creating interlocking conditions for the subsequent connection between the post-pouring strip concrete and the concrete slab 7, and fundamentally reducing the risk of gaps between the old and new concrete.

[0019] Furthermore, it also includes a high-strength mortar layer 8, which fills the groove formed on the concrete slab 7 after the removal of the wooden strips 3. The wooden strips 3 have a height of 20mm and a width of 30mm.

[0020] In the above, the high-strength mortar layer 8 is cast using high-strength mortar. High-strength mortar has good fluidity and density, and can fully fill the tiny gaps in the groove when filling, further improving the anti-leakage ability of the joint area and solving the quality pain points of rotten roots and hollowness in the internal corners of the joints in traditional construction.

[0021] Furthermore, a release agent is applied to the outer surface of the wood strip 3.

[0022] In the above, the release agent applied to the outer surface of the wooden strip 3 is a special concrete release agent, which can form a release film between the wooden strip 3 and the concrete slab 7, greatly reducing the adhesion between the two. On the one hand, it can ensure that after the concrete slab 7 has reached the design strength, when the wooden strip 3 is removed, there will be no problems such as damage, chipping, or exposed reinforcement at the edge of the groove of the concrete slab 7 due to adhesion, thus ensuring that the groove shape is regular and the concrete edge is intact. On the other hand, the smooth removal of the wooden strip 3 can reduce the vibration damage to the concrete slab 7 caused by violent removal and avoid the generation of micro-cracks in the concrete due to vibration.

[0023] Furthermore, the closing mesh 1 is fixedly connected to the floor slab reinforcement 4 and the reinforcing steel bar 6, and the fixed connection method is to tie it with iron wire.

[0024] In the above, the closing mesh 1 is fixed to the floor slab reinforcement 4 and the reinforcing steel bar 6 by binding with iron wire. This connection method has the advantages of simple operation, low cost and strong firmness.

[0025] Example 2 For further details, please refer to [link / reference]. Figs. 1-3 Based on Embodiment 1, the top of the support frame 5 abuts against the bottom of the template 2, and the template 2 is supported by the support frame 5.

[0026] In the above, after the concrete slab 7 and the post-cast strip concrete have been formed and reached the designed demolding strength, the support frame 5 and the formwork 2 can be removed in sequence.

[0027] Furthermore, the reinforcing steel bar 6 is composed of multiple steel bars arranged in a crisscross pattern, and the multiple steel bars arranged in a crisscross pattern are fixedly connected by binding wire.

[0028] In the above, the reinforcing steel bar 6 is made of multiple steel bars arranged in a cross pattern and fixed by wire binding to form a mesh steel skeleton, which improves the overall structural strength and load-bearing capacity of the concrete slab 7 and the joint area of ​​the post-cast strip.

[0029] The working principle of the construction structure for the post-cast strip joint provided by this utility model is as follows: First, erect the support frame 5 and place it below the formwork 2. Support the formwork 2 through the top of the support frame 5. Embed the wooden strips 3 at the connection between the concrete slabs 7 and the formwork 2 on both sides of the post-pouring strip area. Apply release agent to the outer surface of the wooden strips 3 in advance to ensure temporary adhesion between the wooden strips 3 and the formwork 2 and the concrete to be poured. This also makes it easier to remove the wooden strips 3 later. The floor slab reinforcement 4 and the reinforcing steel 6 are embedded in the area to be poured according to the design requirements. After the concrete is poured, the concrete slab 7 is formed. The floor slab reinforcement 4 ensures the foundation bearing capacity of the concrete slab 7, and the reinforcing steel 6 further enhances the overall strength of the structure, avoiding the problem of overall weakening caused by dense reinforcement or structural separation in the post-pouring strip area. Install the sealing mesh 1 in the post-pouring strip area and fix the sealing mesh 1 to the floor slab reinforcement 4 and the reinforcing steel 6. The sealing mesh 1 can effectively block the leakage of grout during the pouring of concrete on both sides. At the same time, it can form a rough joint surface on the concrete surface, providing a good interface for the subsequent bonding of the post-pouring strip concrete and the concrete slab 7. Then pour the concrete on both sides to form the concrete slab 7. After the required closing time for the post-cast strip is reached, the concrete in the post-cast strip area is poured. After the concrete is formed and meets the removal conditions, the support frame 5, formwork 2 and wooden strips 3 are removed. After the wooden strips 3 are removed, a groove will be formed on the concrete slab 7. High-strength mortar will be used to fill the groove to form a high-strength mortar layer 8, thus completing the final forming of the post-cast strip joint.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A construction structure for a post-cast strip joint, characterized in that, Includes closing mesh (1), formwork (2), wooden strips (3), floor slab reinforcement (4), support frame (5), reinforcing steel bars (6) and concrete slab (7); The support frame (5) is located below the template (2) and is used to support the template (2). The floor slab reinforcement (4) and reinforcing steel (6) are both embedded inside the concrete slab (7); The closing mesh (1) is set in the post-pouring strip area, which is the construction space reserved between the concrete slabs (7) and located between the concrete slabs (7) on both sides of the post-pouring strip. The wooden strip (3) is embedded in the connection between the concrete slab (7) and the template (2) on both sides of the post-cast strip.

2. The construction structure of the post-cast strip joint according to claim 1, characterized in that, It also includes a high-strength mortar layer (8), which fills the groove formed on the concrete slab (7) after the removal of the wooden strips (3).

3. The construction structure of the post-cast strip joint according to claim 1, characterized in that, The outer surface of the wooden strip (3) is coated with a release agent.

4. The construction structure of a post-cast strip joint according to claim 1, characterized in that, The closing mesh (1) is fixedly connected to the floor slab reinforcement (4) and the reinforcing steel bars (6), and the fixed connection method is to tie it with iron wire.

5. The construction structure of a post-cast strip joint according to claim 1, characterized in that, The reinforcing steel bar (6) is composed of multiple steel bars, which are arranged in a cross pattern.

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