Splicing seam connecting structure of precast concrete member

Abstract

The invention discloses an abutted seam connecting structure of precast concrete members, which comprises the precast concrete members spliced with each other and connecting steel bars penetrating through the precast concrete members and extending into abutted seams, and abutted seam connecting pieces are pre-embedded at the splicing ends of the precast concrete members. After the abutted seam connecting pieces and the connecting steel bars of the adjacent prefabricated concrete members are in butt joint, concrete wet joints are cast in place, and the abutted seam connecting pieces serve as formworks of the cast-in-place concrete wet joints and are permanently embedded in the concrete members to play a role in protecting the connecting steel bars after pouring is completed; the abutted seam connecting piece is arranged in the range of the wet joint for connecting the prefabricated concrete members, and the abutted seam connecting piece serving as a protective layer of post-pouring wet joint concrete is permanently retained in the structural member, so that the effect of enhancing abutted seam connecting and anchoring is achieved, all supports and templates related to the post-pouring wet joint concrete are saved, the cost is saved, and the construction efficiency is improved. Construction waste can be reduced to the maximum extent, and environmental protection and reduction of carbon emission are facilitated.

Description

Technical Field

[0001] The invention relates to a concrete assembly structure, in particular to a joint connection structure of a prefabricated concrete component. Background Art

[0002] Prefabricated integral concrete structure is a prefabricated concrete structure that is connected by precast concrete components in a reliable way and forms an integral whole with post-cast concrete and cement-based grouting materials on site. Precast concrete components are divided into horizontal components and vertical components. Vertical components are columns and shear walls; horizontal components are beams and floor slabs. Since precast concrete components generally adopt the connection method of post-cast concrete wet joints, that is, a post-cast concrete belt is left between adjacent precast concrete components, and the steel bars extending toward each other from the precast concrete components are overlapped in this range or anchored around the cast-in-place concrete components in this area. Therefore, for horizontal components, this connection method must set up scaffolding and set up corresponding bottom formwork; for vertical components, this connection method must set up vertical side formwork on both sides of the components. In the above two cases, the formwork method of post-cast concrete wet joints will increase the amount of work, increase the project cost, prolong the construction period, and generate a large amount of construction waste, which is not conducive to environmental protection and reducing carbon emissions. In particular, for horizontal components with large lower floor heights and vertical components around the building, the above problems are particularly prominent.

[0003] Therefore, it is necessary to solve the problems of large engineering workload, long construction period, high engineering cost and environmental protection brought about by the traditional precast concrete component connection method. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a joint connection structure of precast concrete components to solve the problems of large engineering workload, long construction period, high engineering cost and environmental protection caused by the traditional precast concrete component connection method.

[0005] The joint connection structure of the precast concrete component of the present invention comprises precast concrete components spliced ​​to each other and connecting steel bars that penetrate the precast concrete components and extend into the joints, wherein joint connectors are pre-buried at the joint ends of the precast concrete components, and the joint connectors of adjacent precast concrete components and the connecting steel bars are respectively butted against each other to form a cast-in-place concrete wet joint, and the joint connectors serve as a template for the cast-in-place concrete wet joint, and are permanently buried in the concrete component after the casting is completed to protect the connecting steel bars;

[0006] Furthermore, the joint connector has an L-shaped cross-section structure adapted to the corners of the precast concrete component, one side of the L-shaped structure is located in the precast concrete component, and the other side extends to the joint;

[0007] Furthermore, the joint connector is located on one side or both sides of the joint end of the precast concrete component;

[0008] Further, when the precast concrete component is a horizontal precast component, the joint connector is arranged at the bottom surface of the splicing end of the precast concrete component and is arranged flush with the bottom edge of the precast concrete component, and the joint connector can be used as a bottom template for the wet joint of the cast-in-place concrete;

[0009] Furthermore, when the precast concrete component is a vertical precast component, the joint connector is located on both sides of the splicing end of the precast concrete component and is arranged flush with both sides of the precast concrete component. The joint connector can be used as a side formwork for the wet joint of the cast-in-place concrete.

[0010] Furthermore, when the precast concrete component is a vertical precast component, the two joint connectors located at the joint end of the precast concrete component can be butted against each other in the precast concrete component to form an integral structure with a U-shaped cross section;

[0011] Furthermore, the corners of the seam connector are rounded;

[0012] Furthermore, a through hole for connecting the steel bars to pass through is provided on the joint connector located in the precast concrete component;

[0013] Furthermore, the through holes are arranged to gradually become smaller from close to the precast concrete component to the joint;

[0014] Furthermore, the joint connector is made of cement material.

[0015] The beneficial effects of the present invention are as follows: the joint connection structure of the precast concrete components of the present invention, by arranging joint connectors within the wet joint range of the precast concrete components, and the joint connectors are permanently retained in the structural components as a protective layer of the post-cast wet joint concrete, which not only plays a role in strengthening the anchoring of the joint connection, but also saves all supports and formwork related to the post-cast wet joint concrete, which not only saves costs and shortens the construction period, but also can minimize construction waste, which is beneficial to environmental protection and reduces carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 , Figure 2 Schematic diagrams of different structures of the seam connector of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the joint connectors and connecting steel bars of precast concrete components with different thicknesses;

[0019] Figure 4 Structural schematic diagram for horizontal prefabricated components;

[0020] Figure 5It is a structural schematic diagram of vertical prefabricated components;

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the joint connection structure of the precast concrete component of the present invention. DETAILED DESCRIPTION

[0022] The joint connection structure of the precast concrete components of this embodiment includes precast concrete components 4 that are spliced ​​together and connecting steel bars 2 that are set through the precast concrete components 4 and extend into the joints. A joint connector 1 is pre-buried at the joint end of the precast concrete components 4. The joint connectors 1 of adjacent precast concrete components 4 and the connecting steel bars 2 are respectively butted to form a cast-in-place concrete wet joint 3. The joint connector 1 serves as a template for the cast-in-place concrete wet joint 3 and is permanently buried in the concrete component after casting to protect the connecting steel bars 2. The precast concrete components 4 all have connecting steel bars 2. When the joints are spliced, the protruding ends of the connecting steel bars 2 are located in the joints between adjacent precast concrete components 4 and overlap each other. The joint connectors 1 are butted to each other, and then the cast-in-place concrete wet joint 3 is anchored. At this time, the joint connector 1 can be used as a template for cast-in-place concrete, and is integrally formed with the concrete and permanently retained in the concrete structure as a protective layer for the connecting steel bars 2. The connecting steel bars 2 can be U-shaped steel bars. That is to say, the joint connector 1 of the present invention can be used as a template for cast-in-place concrete, and later as an internal reinforcement of the joint structure to play multiple roles in enhancing anchoring and protecting the connecting steel bars 2. During the construction process, there is no need to set up additional templates or build scaffolding, which not only saves costs and shortens construction period, but also minimizes construction waste, which is beneficial to environmental protection and reduces carbon emissions.

[0023] In this embodiment, the joint connector 1 has an L-shaped cross-section structure adapted to the corners of the precast concrete component 4, one side of the L-shaped structure is located in the precast concrete component 4, and the other side extends to the joint; the joint connector 1 is a slat-like structure with an L-shaped cross-section, forming a frame structure at the connection end of the precast concrete component 4. The structure of the joint connector 1 is as follows Figure 1 As shown. One side of the L-shaped structure is located in the precast concrete component 4, and the other side is located at the joint for one-to-one splicing with the L-shaped structure of another precast concrete component 4. After the connecting steel bars 2 of two adjacent precast concrete components 4 are butted and the joint connectors 1 are butted, concrete is poured on site for anchoring.

[0024] In this embodiment, the joint connector 1 is located on one or both sides of the splicing end of the precast concrete component 4; when the precast concrete component 4 is a horizontal precast component 402, the joint connector 1 is located on the bottom surface of the splicing end of the precast concrete component 4 and is flush with the bottom edge of the precast concrete component 4. The joint connector 1 can be used as the bottom template of the cast-in-place concrete wet joint 3; the horizontal precast component 402 only needs to set the joint connector 1 at the bottom of the splicing end, one side of the L-shaped structure is flush with the bottom, and the other side is located in the joint connector 1. In order to ensure the stability of the connection end, the other side of the L-shaped structure is completely located in the joint connector 1 and is flush with the end face of the precast concrete component 4. At this time, the joint connector 1 can be used as the bottom template of the cast-in-place concrete to ensure that the precast component concrete is tightly combined with the angle frame. The connecting steel bars 2 of the horizontal precast component 402 are located at the bottom.

[0025] When the precast concrete component 4 is a vertical precast component 401, the joint connector 1 is located on both sides of the splicing end of the precast concrete component 4 and is set flush with the two side edges of the precast concrete component 4. The joint connector 1 can be used as a side template for the cast-in-place concrete wet joint 3; the joint of the vertical precast component 401 needs to be provided with templates on both sides of the vertical direction when casting concrete in situ, so the joint connector 1 is set on both sides of the thickness of the splicing end of the precast concrete component 4, which not only plays the role of template (at least part of the height of the side template) when casting concrete in situ, but also plays the role of joint structural reinforcement, ensuring that the precast component concrete is tightly combined with the joint connector 1. Connecting steel bars 2 are set on both sides of the vertical precast component 401, and the anchored joint connector 1 plays the role of a protective layer for the connecting steel bars 2 on each side.

[0026] In this embodiment, when the precast concrete component 4 is a vertical precast component 401, the two joint connectors 1 located at the joint end of the precast concrete component 4 can be connected to each other in the precast concrete component 4 to form an integral structure with a U-shaped cross section; the joint connectors 1 of the vertical precast component 401 are arranged on both sides of the thickness of the component joint end. Figure 3 (a); When the thickness of the vertical prefabricated component 401 is small, the joint connectors 1 on both sides of the thickness can be combined into a U-shaped frame, Figure 3 (b) The connecting steel bar 2 itself can be a U-shaped steel bar, or the ends of the connecting steel bar 2 can overlap each other to form a U shape, that is, the connecting steel bars 2 overlap each other at the joint to form a rectangular shape (such as Figure 5 ). When pouring the precast component concrete, it is used as its end formwork (at least part of the height end formwork) to ensure that the precast component concrete is tightly combined with the frame of the joint connector 1 or the U-shaped frame.

[0027] In this embodiment, the corners of the joint connector 1 are rounded to ensure that the wet joint concrete slurry penetrates the thickness range of the connector.

[0028] In this embodiment, a through hole 5 for connecting the steel bar 2 to pass through is opened on the joint connector 1 located in the precast concrete component 4; the through hole 5 is gradually reduced from the precast concrete component 4 to the joint; the connecting steel bar 2 in the wet joint range is allowed to pass through the through hole 5, and the diameter of the through hole 5 of the connecting steel bar 2 on the joint connector 1 changes with the depth. The hole diameter is larger on the side close to the concrete of the precast component, and the hole diameter is the largest after entering the joint connector 1 to a certain depth, and finally shrinks to the smallest on the outside (such as Figure 6 When pouring the precast concrete, cement slurry enters the through hole 5, and after solidification, the connecting frame and the connecting steel bar 2 are integrated, meeting the requirement of fixing the frame as a template during construction. Preferably, a round hole is used, and a variable diameter structure with enhanced mechanical bite is used within the thickness range. When pouring the precast concrete, the cement slurry entering the hole can firmly fix the joint connector 1.

[0029] In this embodiment, the joint connector 1 is made of cement material; it is made of high-performance cement material (including suitable fiber material), and its strength and durability are much higher than post-cast wet joint concrete.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A joint connection structure of a precast concrete component, characterized in that: It includes precast concrete components spliced ​​to each other and connecting steel bars that penetrate the precast concrete components and extend into the joints. Joint connectors are pre-embedded at the splicing ends of the precast concrete components. The joint connectors of adjacent precast concrete components and the connecting steel bars are butt-jointed to form cast-in-place concrete wet joints. The joint connectors serve as templates for cast-in-place concrete wet joints and are permanently embedded in the concrete components after pouring to protect the connecting steel bars.

2. The joint connection structure of precast concrete components according to claim 1 is characterized in that: The joint connector has an L-shaped cross-section structure adapted to the corners of the precast concrete component. One side of the L-shaped structure is located in the precast concrete component, and the other side extends to the joint for connection.

3. The joint connection structure of precast concrete components according to claim 2, characterized in that: The joint connector is located on one side or both sides of the joint end of the precast concrete component.

4. The joint connection structure of precast concrete components according to claim 3 is characterized in that: When the precast concrete component is a horizontal precast component, the joint connector is located at the bottom surface of the splicing end of the precast concrete component and is flush with the bottom edge of the precast concrete component. The joint connector can be used as a bottom template for the cast-in-place concrete wet joint.

5. The joint connection structure of precast concrete components according to claim 3, characterized in that: When the precast concrete component is a vertical precast component, the joint connector is located on both sides of the splicing end of the precast concrete component and is arranged flush with both side edges of the precast concrete component. The joint connector can be used as a side formwork for the cast-in-place concrete wet joint.

6. The joint connection structure of precast concrete components according to claim 5, characterized in that: When the precast concrete component is a vertical precast component, two joint connectors located at the joint ends of the precast concrete component can be butted against each other in the precast concrete component to form an integral structure with a U-shaped cross section.

7. The joint connection structure of precast concrete components according to claim 2, characterized in that: The corners of the seam connector are rounded.

8. The joint connection structure of precast concrete components according to claim 1, characterized in that: A through hole for connecting steel bars to pass through is provided on the joint connector located in the precast concrete component.

9. The joint connection structure of precast concrete components according to claim 8, characterized in that: The through holes are arranged to gradually become smaller from close to the precast concrete component to the joint.

10. The joint connection structure of precast concrete components according to claim 1, characterized in that: The joint connector is made of cement material.

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