A post-cast strip construction steel bar connecting structure

Abstract

The utility model belongs to the field of construction engineering construction technology, especially be related to a reinforcing steel bar connecting structure of post-pouring zone construction, and post-pouring zone is set between first concrete section and second concrete section, it includes: first reinforcing steel bar subassembly, including a plurality of first reinforcing steel bars, and first reinforcing steel bar is buried in first concrete section and end portion is located in the inside of post-pouring zone, second reinforcing steel bar subassembly, including a plurality of second reinforcing steel bars, and second reinforcing steel bar is buried in second concrete section and end portion is located in the inside of post-pouring zone, first reinforcing steel bar and second reinforcing steel bar are correspondingly set respectively, connector is used for in the inside of post-pouring zone with first reinforcing steel bar and second reinforcing steel bar are detachably connected. This structure can realize the quick construction of assembly, greatly improve the work efficiency, realize the high-quality connection of standardization, and the quality is controllable and uniform, optimize the operation interface, guarantee the forming quality, built-in adjustable function, adapt to the change of the scene.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and in particular relates to a steel reinforcement connection structure for post-pouring strip construction. Background Technology

[0002] In cast-in-place monolithic reinforced concrete ultra-long structures, temporary expansion joints—post-cast strips—are typically installed during construction to overcome the adverse effects of temperature changes and concrete shrinkage. These post-cast strips temporarily divide the structure into several sections. After the previously poured concrete has fully shrunk and deformed (usually requiring 1-2 months), they are then sealed with micro-expansion concrete, making the structure a continuous whole.

[0003] Based on the discussion of crack problems in the structural design of building engineering and the relevant specifications, the traditional treatment of the reinforcement at the post-cast strip is: the reinforcement of the post-cast strip of the basement floor slab, exterior walls and floor slab should be broken and lapped or welded in two stages.

[0004] This traditional approach has the following technical drawbacks: 1. Low construction efficiency: Each broken steel bar needs to be welded or tied and spliced ​​on-site in the narrow space of the post-pouring strip, resulting in low work efficiency and long construction period.

[0005] 2. Unstable connection quality: Welding quality is greatly affected by the welder's skill level and weather conditions, and defects such as incomplete welding and slag inclusion are prone to occur; lap joints require a long lap length (usually 35-50 times the diameter of the steel bar), which wastes materials and is prone to voids during concrete pouring.

[0006] 3. Difficulty in formwork erection and easy leakage of grout: A large number of broken steel bar ends protrude into the gaps of the post-cast strip, which seriously hinders the installation and sealing of the side formwork, resulting in concrete leakage and affecting the molding quality.

[0007] 4. Inability to adjust compensation: Traditional methods cannot adjust the length of steel bar connections, making it difficult to compensate for minor length changes caused by construction and installation errors or concrete shrinkage. Utility Model Content

[0008] In view of the technical problems existing in the background art, this utility model provides a steel bar connection structure for post-pouring strip construction.

[0009] To achieve the above objectives, the technical solution provided by this utility model is as follows: A steel reinforcement connection structure for post-cast strip construction, wherein the post-cast strip is located between a first concrete section and a second concrete section, comprising: The first reinforcing steel assembly includes a plurality of first reinforcing steel bars, which are embedded in the first concrete section and have their ends located inside the post-cast strip. The second reinforcing steel assembly includes several second reinforcing steel bars, which are embedded in the second concrete section and have their ends located inside the post-cast strip; the first and second reinforcing steel bars are respectively provided; A connector for detachably connecting the first reinforcing bar and the second reinforcing bar inside the post-cast strip.

[0010] Optionally, the connector is a connecting sleeve fitted onto the connection end of the first and second reinforcing bars, which connects the first and second reinforcing bars by radial compression.

[0011] Optionally, the first and second reinforcing bars are provided in two layers along the height direction.

[0012] Optionally, several third reinforcing bars are vertically arranged on several first and second reinforcing bars to form an upper and lower reinforcing mesh, and the upper and lower reinforcing meshes located in the first and second concrete sections are connected by several fourth reinforcing bars.

[0013] Optionally, the upper and lower reinforcing meshes located within the post-cast strip are connected by several connector positioning components.

[0014] Optionally, the connector positioning assembly includes a fifth steel bar and a sixth steel bar with the same structure. The fifth steel bar and the sixth steel bar are configured in a U-shape. The fifth steel bar has a first support bar perpendicular to it on both sides, and the sixth steel bar has a second support bar perpendicular to it on both sides. The fifth and sixth reinforcing bars are spaced at a fixed distance. The first supporting bar on one side is connected to the first mounting rod, and the first mounting rod is connected to the bottom side of the inverted sixth reinforcing bar. The second supporting bar on one side is connected to the second mounting rod, and the second mounting rod is connected to the top side of the upright fifth reinforcing bar, thereby forming a reinforcing bar support frame. The first mounting rod and the second mounting rod are staggered in the top view, and several connecting sleeves are evenly distributed on the first mounting rod and the second mounting rod.

[0015] Optionally, the first mounting rod and the first support bar are supported on the upper side of the lower steel mesh, and the upper steel mesh is supported on the upper side of the second mounting rod and the second support bar.

[0016] Optionally, after the connecting sleeve is fitted onto the first and second reinforcing bars, the two sides of the connecting sleeve are respectively limited by the third reinforcing bars.

[0017] Optionally, the bottom side of the post-cast strip is provided with a water pressure-resistant pad layer, a concrete panel layer, several waterproof layers, a concrete panel layer and a subfloor layer in sequence.

[0018] Optionally, the first concrete section, the second concrete section, and the post-cast strip are isolated by a post-cast strip sealing template. Each side of the sealing template has two layers, and a water-stop steel plate is set between the upper and lower layers of the sealing template. The connector positioning component is set between the water-stop steel plates on both sides.

[0019] This utility model has the following advantages and beneficial effects: 1. Enables rapid prefabricated construction, greatly improving work efficiency. The traditional on-site rebar welding / tying work during post-cast strip pouring is transformed into an assembly operation of "alignment and pre-installation" in the early stage and extrusion and fixing connection in the later stage. Core connection components (such as connecting sleeves) are prefabricated in the factory, and only simple tools (such as hydraulic pliers) are needed on site to complete the connection of individual rebars in a short time, significantly shortening the critical construction period.

[0020] 2. Achieve standardized, high-quality connections with controllable and uniform quality. The connection strength is guaranteed by precision-manufactured mechanical components (connecting sleeves), completely eliminating human factors and environmental influences. Performance exceeds the specifications for welded or lap joints.

[0021] 3. Optimize the user interface to ensure molding quality. The pre-embedded design allows for the laying of reinforcing bars at the interface of the post-cast strip after the concrete is poured first. The connecting sleeves are also pre-assembled at the joints of the reinforcing bars, with no messy exposed reinforcing bar ends. This provides a clean and orderly working surface for the installation and sealing of the side formwork of the post-cast strip, effectively preventing grout leakage and ensuring the density and appearance quality of the post-cast strip concrete.

[0022] 4. Built-in adjustable function to adapt to changes in the field. The innovative design of the connecting sleeve gives it adjustability. After the pre-poured concrete is poured, the reinforcing bars at the interface of the post-poured strip are pre-connected through the connecting sleeve, which can effectively compensate for the slight gaps caused by the shrinkage of the pre-poured concrete. Attached Figure Description

[0023] Figure 1 This is one of the structural diagrams of the pre-cast concrete and the post-cast strip in this utility model; Figure 2 This is the second structural diagram of the pre-cast concrete and post-cast strip in this utility model; Figure 3 for Figure 2 A magnified view of a portion of point a. Figure 4 for Figure 2 Front view; Figure 5 This is a structural diagram showing the arrangement of reinforcing bars before the pouring of pre-cast concrete and post-cast strip in this utility model. Figure 6 for Figure 5 A magnified view of a section at point b in the middle; Figure 7 for Figure 5 Front view; Figure 8 This is a partially enlarged view of the steel bar joint at the post-cast strip location in this utility model; Figure 9 for Figure 8 Front view; Figure 10 This is a structural diagram of the reinforcing bars, connectors, and connector positioning components at the post-cast strip location in this utility model; Figure 11 This is a connection structure diagram of the connector and connector positioning assembly in this utility model; Figure 12 for Figure 11 Front view; Figure 13 for Figure 11 Left view.

[0024] Reference numerals: A-First concrete section, B-Second concrete section, C-Post-pouring strip, D-Base layer, E-Water pressure resistant cushion layer, F-Concrete panel layer, G-Waterproof layer, 1-Reinforcing mesh, 1a-Upper reinforcing mesh, 1b-Lower reinforcing mesh, 1c-Fourth reinforcing bar, 11-First reinforcing bar, 12-Second reinforcing bar, 13-Third reinforcing bar, 2-Connector positioning assembly, 21-Fifth reinforcing bar, 211-First support bar, 212-First mounting rod, 22-Sixth reinforcing bar, 221-Second support bar, 222-Second mounting rod, 3-Connecting sleeve, 4-Sealing template, 5-Waterstop steel plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] Example like Figures 1 to 13As shown, a steel reinforcement connection structure for post-cast strip construction is provided. The post-cast strip C is set between the first concrete section A and the second concrete section B. The post-cast strip C temporarily divides the structure into several sections. After the first concrete section A and the second concrete section B, which were poured first, have fully shrunk and deformed, they are then sealed with micro-expansion concrete to form the post-cast strip C, making the structure a continuous whole.

[0028] like Figures 1 to 13 As shown, a steel reinforcement connection structure for post-cast strip construction includes: The first steel reinforcement assembly includes a plurality of first steel bars 11, which are embedded in the first concrete section A and have their ends located inside the post-cast strip C. The second reinforcing steel assembly includes several second reinforcing steel bars 12, which are embedded in the second concrete section B and have their ends located inside the post-cast strip C; the first reinforcing steel bar 11 and the second reinforcing steel bar 12 are respectively provided.

[0029] like Figure 5 As shown, this utility model is equivalent to pre-burying a steel mesh 1 in the entire foundation in one go. Figure 8 As shown, the first reinforcing bar 11 and the second reinforcing bar 12 on the left and right sides are joined at position C of the post-cast strip. The first reinforcing bar 11 and the second reinforcing bar 12 have a gap and do not contact each other.

[0030] A connector is used to detachably connect the first reinforcing bar 11 and the second reinforcing bar 12 inside the post-cast strip C. For example... Figure 6 and Figure 7 As shown, in a preferred embodiment of this utility model, the connector is a connecting sleeve 3 sleeved at the connection end of the first reinforcing bar 11 and the second reinforcing bar 12, and the first reinforcing bar 11 and the second reinforcing bar 12 are connected by subsequent radial extrusion.

[0031] This design is equivalent to installing the steel mesh 1 all at once in the early stage, and making the first steel bar 11 and the second steel bar 12 butt together at position C of the post-cast strip with a gap (such as...). Figure 5 and Figure 8 As shown). Figure 6 As shown, after the steel mesh 1 is installed, a connecting sleeve 3 is pre-installed at the joint position of the first steel bar 11 and the second steel bar 12 to achieve a pre-connection. In other words, the connecting sleeve 3 is installed when the first steel bar 11 and the second steel bar 12 are installed to connect them. However, at this time, the connecting sleeve 3 can slide on the first steel bar 11 and the second steel bar 12, which is a movable connection.

[0032] like Figure 2 As shown, the first concrete section A and the second concrete section B are then poured.

[0033] like Figure 1As shown, after the first concrete section A and the second concrete section B have fully shrunk and deformed, the connecting sleeve 3 is squeezed by cold extrusion to completely fix the first steel bar 11 and the second steel bar 12 through the connecting sleeve 3. Then, micro-expansion concrete is poured to seal the post-pouring strip C to form the post-pouring strip C.

[0034] This invention enables rapid prefabrication: transforming the traditional on-site steel bar welding / tying work during post-pouring strip C pouring into an assembly process of pre-alignment and pre-installation followed by compression and fixing. Core connecting components (such as connecting sleeves 3) are prefabricated in the factory, and only simple tools (such as hydraulic pliers) are needed on-site to complete the connection of individual steel bars in a short time, significantly shortening the critical construction period.

[0035] This invention achieves standardized, high-quality connections: the connection strength is guaranteed by precision-manufactured mechanical components (connecting sleeve 3), completely eliminating human factors and environmental influences. Its performance exceeds the specifications for welded or lap joints.

[0036] This utility model optimizes the working interface and ensures molding quality: it adopts a pre-embedded design, and after the concrete is poured first, the reinforcing bars are already laid at the interface of the post-pouring strip C, and the connecting sleeve 3 is also pre-assembled at the joint position of the reinforcing bars. There are no messy reinforcing bar ends exposed, which provides a clean and neat working surface for the installation and sealing of the side formwork of the post-pouring strip C, effectively preventing grout leakage and ensuring the density and appearance quality of the concrete in the post-pouring strip C.

[0037] This utility model has a built-in adjustable function: after the concrete is poured first, the steel bars at the interface of the post-pouring strip C are pre-connected through the connecting sleeve 3, which can effectively compensate for the slight gaps caused by the shrinkage of the first concrete. After the first concrete section A and the second concrete section B have fully shrunk and deformed, the connecting sleeve 3 is squeezed by cold extrusion, and the first steel bar 11 and the second steel bar 12 are completely fixedly connected through the connecting sleeve 3.

[0038] In this invention, two layers of first reinforcing bars 11 and second reinforcing bars 12 are provided along the height direction. Furthermore, the joint points of the first reinforcing bars 11 and second reinforcing bars 12 in the upper and lower layers are staggered.

[0039] like Figure 7 and Figure 9As shown, in this utility model, several first reinforcing bars 11 and second reinforcing bars 12 are vertically arranged with several third reinforcing bars 13 to form an upper reinforcing mesh 1a and a lower reinforcing mesh 1b. The first reinforcing bars 11 and third reinforcing bars 13 are arranged in a grid pattern, and the second reinforcing bars 12 and third reinforcing bars 13 are also arranged in a grid pattern. The upper reinforcing mesh 1a and the lower reinforcing mesh 1b located in the first concrete section A and the second concrete section B are connected by several fourth reinforcing bars 1c to achieve connection and support between the upper reinforcing mesh 1a and the lower reinforcing mesh 1b.

[0040] like Figures 1 to 13 As shown, in this utility model, the upper layer steel mesh 1a and the lower layer steel mesh 1b located in the post-pouring strip C are connected by a number of connector positioning components 2. The connector positioning components 2 are used to position and install the connectors, and at the same time realize the connection and support between the upper layer steel mesh 1a and the lower layer steel mesh 1b in the post-pouring strip C.

[0041] like Figures 1 to 13 As shown, the connector positioning assembly 2 includes a fifth reinforcing bar 21 and a sixth reinforcing bar 22 with identical structures. The fifth reinforcing bar 21 and the sixth reinforcing bar 22 are arranged along the axial direction of the first reinforcing bar 11. The fifth reinforcing bar 21 and the sixth reinforcing bar 22 are U-shaped. The fifth reinforcing bar 21 has a first supporting rib 211 perpendicular to it on both sides. The sixth reinforcing bar 22 has a second supporting rib 221 perpendicular to it on both sides. The first supporting rib 211 and the second supporting rib 221 are arranged along the axial direction of the third reinforcing bar 13.

[0042] like Figures 10-13 As shown, the fifth reinforcing bar 21 and the sixth reinforcing bar 22 are spaced at a fixed distance and are arranged in opposite directions. The first supporting bar 211 on one side is connected to the first mounting rod 212, and the first mounting rod 212 is connected to the bottom side of the inverted sixth reinforcing bar 22. The second supporting bar 221 on one side is connected to the second mounting rod 222, and the second mounting rod 222 is connected to the top side of the upright fifth reinforcing bar 21, thus forming a reinforcing bar support frame.

[0043] like Figures 10-13 As shown, the first mounting rod 212 and the second mounting rod 222 are staggered in the top view. Several connecting sleeves 3 are evenly distributed on the first mounting rod 212 and the second mounting rod 222 to realize the prefabrication and assembly of the connector positioning assembly 2 and the connecting sleeves 3.

[0044] like Figures 6 to 13As shown, the first mounting rod 212 and the first support rib 211 are supported on the upper side of the lower steel mesh 1b. The connecting sleeve 3 on the bottom side connects the first steel bar 11 and the second steel bar 12 on the bottom side. The upper steel mesh 1a is supported on the upper side of the second mounting rod 222 and the second support rib 221. The connecting sleeve 3 on the upper side connects the first steel bar 11 and the second steel bar 12 on the upper side. This forms a stable support and pre-connection for the steel bars in the post-cast strip C. The upper and lower connecting sleeves 3 are staggered to facilitate later connection using hydraulic clamps or other methods.

[0045] like Figure 6 As shown, after the connecting sleeve 3 is fitted onto the first reinforcing bar 11 and the second reinforcing bar 12, the two sides of the connecting sleeve 3 are respectively limited by the third reinforcing bar 13. This design achieves approximate positioning of the connecting sleeve 3. When the entire connector positioning assembly 2 and the connecting sleeve 3 are installed between the upper reinforcing mesh 1a and the lower reinforcing mesh 1b, the connecting sleeve 3 connects the first reinforcing bar 11 and the second reinforcing bar 12 on the upper and lower sides. Then, the first concrete section A and the second concrete section B are poured. When the first concrete section A and the second concrete section B are fully contracted and deformed, the reinforcing mesh 1 on both sides adaptively contracts, and then moves slightly within the connecting sleeve 3 for adaptive adjustment. This frame support positioning function can quickly position and assemble, achieve pre-connection, and facilitate quick and easy rebar connection before pouring the post-pouring strip C, further improving construction quality and efficiency.

[0046] In this utility model, a conical foundation pit is pre-excavated on the bottom side of the post-cast strip C, and a water pressure resistant pad layer E, a concrete panel layer F, several waterproof layers G, a concrete panel layer F and a base layer D are sequentially arranged on the bottom side of the post-cast strip C.

[0047] In this invention, the first concrete section A, the second concrete section B, and the post-cast strip C are separated by a sealing template 4 for the post-cast strip C. The sealing template 4 is a rectangular steel plate with multiple layers of steel mesh 1 with gradually decreasing diameters inside. It acts as a template during the pouring of the first concrete section A, the second concrete section B, and the post-cast strip C, and does not need to be removed after pouring. Each side of the sealing template 4 has two layers, and a water-stop steel plate 5 is set between the upper and lower layers of the sealing template 4. The connector positioning component 2 is set between the water-stop steel plates 5 on both sides.

[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A reinforcing steel connection structure for post-cast strip construction, wherein the post-cast strip is located between a first concrete section and a second concrete section, characterized in that, include: The first reinforcing steel assembly includes a plurality of first reinforcing steel bars, which are embedded in the first concrete section and have their ends located inside the post-cast strip. The second reinforcing steel assembly includes several second reinforcing steel bars, which are embedded in the second concrete section and have their ends located inside the post-cast strip; the first and second reinforcing steel bars are respectively provided; A connector for detachably connecting the first reinforcing bar and the second reinforcing bar inside the post-cast strip.

2. The steel reinforcement connection structure for post-cast strip construction according to claim 1, characterized in that: The connector is a connecting sleeve fitted onto the connection end of the first and second reinforcing bars, which connects the first and second reinforcing bars by radial compression.

3. The steel reinforcement connection structure for post-cast strip construction according to claim 2, characterized in that: The first and second reinforcing bars are provided in two layers along the height direction.

4. The steel reinforcement connection structure for post-cast strip construction according to claim 3, characterized in that: Several first and second reinforcing bars are vertically provided with several third reinforcing bars to form an upper and lower reinforcing mesh. The upper and lower reinforcing meshes located in the first and second concrete sections are connected by several fourth reinforcing bars.

5. The steel reinforcement connection structure for post-cast strip construction according to claim 4, characterized in that: The upper and lower reinforcing meshes located within the post-cast strip are connected by several connector positioning components.

6. The steel reinforcement connection structure for post-cast strip construction according to claim 5, characterized in that: The connector positioning assembly includes a fifth steel bar and a sixth steel bar with the same structure. The fifth steel bar and the sixth steel bar are configured in a U-shape. The fifth steel bar has a first support bar perpendicular to it on both sides, and the sixth steel bar has a second support bar perpendicular to it on both sides. The fifth and sixth reinforcing bars are spaced at a fixed distance. The first supporting bar on one side is connected to the first mounting rod, and the first mounting rod is connected to the bottom side of the inverted sixth reinforcing bar. The second supporting bar on one side is connected to the second mounting rod, and the second mounting rod is connected to the top side of the upright fifth reinforcing bar, thereby forming a reinforcing bar support frame. The first mounting rod and the second mounting rod are staggered in the top view, and several connecting sleeves are evenly distributed on the first mounting rod and the second mounting rod.

7. The steel reinforcement connection structure for post-cast strip construction according to claim 6, characterized in that: The first mounting rod and the first support bar are supported on the upper side of the lower steel mesh, and the upper steel mesh is supported on the upper side of the second mounting rod and the second support bar.

8. The steel reinforcement connection structure for post-cast strip construction according to claim 7, characterized in that: After the connecting sleeve is fitted onto the first and second reinforcing bars, the two sides of the connecting sleeve are respectively limited by the third reinforcing bars.

9. The steel reinforcement connection structure for post-cast strip construction according to claim 7, characterized in that: The bottom side of the post-cast strip is sequentially provided with a water pressure-resistant pad layer, a concrete panel layer, several waterproof layers, a concrete panel layer, and a subfloor.

10. The steel reinforcement connection structure for post-cast strip construction according to claim 9, characterized in that: The first concrete section, the second concrete section and the post-cast strip are isolated by the post-cast strip sealing template. Each side of the sealing template has two layers, and a water-stop steel plate is set between the upper and lower sealing templates. The connector positioning component is set between the water-stop steel plates on both sides.

Images