Tooth groove type dry connection structure for horizontal joint of shear wall

Abstract

The utility model relates to a shear wall horizontal joint tooth groove type dry connection structure which comprises a lower-layer shear wall piece and an upper-layer shear wall piece, joint tooth grooves are formed in the bottom of the lower-layer shear wall piece and the bottom of the upper-layer shear wall piece, and a plurality of joint tooth blocks are installed on the top of the lower-layer shear wall piece and the top of the upper-layer shear wall piece. The top of each joint tooth block is provided with a clamping groove, each clamping groove is clamped with a protrusion formed between every two adjacent joint tooth grooves, and a continuous grouting assembly is arranged in each joint tooth block. Through concave-convex clamping of the joint tooth grooves, the joint tooth blocks can be clamped with the two tooth grooves at the same time, the limiting effect is enhanced, and the risks of sliding and dislocation of the tooth blocks are effectively reduced; and meanwhile, by means of the characteristic that slurry fills the cavity and enters the first grouting cavity in the joint tooth block during grouting, the joint tooth block is further limited and fixed, sliding dislocation of the joint tooth block is avoided through double guarantee, and the structural stability and reliability are improved.

Description

A dry connection structure for horizontal joints of shear walls using toothed grooves Technical Field

[0001] This utility model relates to the field of shear walls, specifically a toothed groove type dry connection structure for horizontal joints of shear walls. Background Technology

[0002] Precast assembled shear wall structure refers to a structure in which various components, including precast shear walls, precast beams, and precast floor slabs, are produced in a standardized manner in a factory, and then the precast components are connected on the construction site by bolting, welding, or post-cast concrete.

[0003] According to publicly available patent CN107152104B, a prefabricated cavity shear wall horizontal joint toothed groove wet connection structure is disclosed. The main load-bearing longitudinal reinforcement of the cavity shear wall is connected by grouting sleeves or mechanical connections, while the vertical reinforcement distributed in the cavity section is not connected, simplifying the connection method. The lower part of the upper cavity shear wall cavity section uses a pre-reserved groove or the cavity itself as a connecting groove, while the upper part of the lower cavity shear wall cavity section has pre-reserved protruding teeth that engage with the groove, improving the shear resistance of the horizontal joint of the cavity shear wall. The prefabricated floor slab of the cavity shear wall, combined with the post-cast concrete overlay and the post-cast concrete between the toothed grooves, forms an integral load-bearing structure, increasing the integrity and stiffness of the prefabricated cavity shear wall structure. This invention significantly reduces the amount of wet construction work on site, facilitates industrialized production and green construction, and can be widely applied to prefabricated cavity shear wall structures.

[0004] In the use of traditional toothed-groove dry connection structures for horizontal shear wall joints, the shear resistance of the horizontal joint is enhanced by the insertion of protruding teeth into the grooves. However, relying solely on the engagement of the protruding teeth and grooves is inevitably limited by manufacturing tolerances, installation errors, or material deformation. These gaps reduce the engagement effect, making the connection structure more susceptible to relative sliding or misalignment under shear forces. This relative sliding or misalignment further weakens the shear resistance of the horizontal shear wall joint, increasing the risk of structural failure under external forces such as earthquakes, and ultimately adversely affecting the overall shear resistance of the horizontal shear wall joint. Therefore, a new technical solution is needed to address this issue. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a toothed groove dry connection structure for horizontal joints of shear walls. This addresses the problem that, in the current use of traditional toothed groove dry connection structures for horizontal joints of shear walls, the method of extending protruding teeth into the grooves to improve the shear resistance of the horizontal joints of cavity shear walls is flawed. Relying solely on the engagement of the protruding teeth and grooves often results in an unavoidable gap between them due to manufacturing tolerances, installation errors, or material deformation. This gap reduces the engagement effect, making the connection structure more prone to relative sliding or misalignment under shear forces. This relative sliding or misalignment further weakens the shear resistance of the horizontal joints of the shear walls, increases the risk of structural failure under external forces such as earthquakes, and ultimately adversely affects the overall shear resistance of the horizontal joints of the shear walls.

[0006] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a dry connection structure for horizontal joint teeth groove of shear wall is designed, including a lower shear wall panel and an upper shear wall panel. The bottom of the lower shear wall panel and the upper shear wall panel are provided with joint teeth grooves. Multiple joint teeth blocks are installed on the top of the lower shear wall panel and the upper shear wall panel. The top of the multiple joint teeth blocks is provided with a slot. The slot engages with the protrusion formed between two adjacent joint teeth grooves. A continuous grouting component is provided inside the joint teeth block.

[0007] Preferably, the continuous grouting assembly includes a first grouting cavity, which extends from the surface of the joint tooth block to the interior to form a concave cavity.

[0008] Preferably, the lower shear wall panel and the upper shear wall panel have multiple cavities inside, and the bottom of the cavity communicates with the joint groove.

[0009] Preferably, a limiting tube is installed at the top of the cavity, and the top of the limiting tube extends into the joint tooth block and communicates with the first grouting cavity inside the joint tooth block.

[0010] Preferably, the lower shear wall panel and the upper shear wall panel are provided with first longitudinal reinforcement on both sides of the top, and the lower shear wall panel and the upper shear wall panel are provided with second grouting cavities on both sides of the bottom.

[0011] Preferably, both the lower shear wall panel and the upper shear wall panel are provided with multiple second longitudinal bars at the top center, and the multiple second longitudinal bars are correspondingly arranged with the third grouting cavity opened in the central protrusion.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model, through the combination of joint grooves, joint blocks, and continuous grouting components, not only utilizes the grooves in the joint grooves to engage with the protrusions formed by adjacent grooves, allowing the joint block to engage two grooves at once, but also ensures that even if one groove slides or misaligns, the other groove will limit the joint block, reducing sliding and misalignment. Furthermore, during grouting of the shear wall, the grout can be directly injected into the cavity, and the grout in the cavity will directly enter the first grouting chamber within the joint block, thereby limiting and fixing the joint block and preventing joint... The solution addresses the issue of tooth block slippage and misalignment. Due to factors such as manufacturing tolerances, installation errors, or material deformation, a certain gap often inevitably exists between the protruding teeth and the tooth groove. This gap reduces the interlocking effect between the teeth and the groove, making the connection structure more prone to relative slippage or misalignment when subjected to shear forces. Such relative slippage or misalignment further weakens the shear resistance of the horizontal joint of the shear wall, increases the risk of structural failure under external forces such as earthquakes, and thus adversely affects the overall shear resistance of the horizontal joint of the shear wall.

[0014] 2. This utility model combines a cavity, a limiting tube, and joint teeth blocks. When grouting is performed in the first grouting cavity within the joint teeth blocks, the injected grout directly enters the cavity of the bottom shear wall segment through the limiting tube. Thus, after the horizontal joints of multiple shear wall segments are completed, grouting can be performed directly from the top shear wall segment. The grout can flow directly into the cavities and joint teeth blocks on multiple shear wall segments, achieving continuous grouting and improving grouting efficiency. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 is a schematic diagram of the bottom structure of this utility model;

[0017] Figure 3 is a schematic diagram of the cavity structure of this utility model.

[0018] In the diagram: 1. Lower shear wall panel; 101. Upper shear wall panel; 2. Joint toothed block; 201. First grouting cavity; 202. Joint toothed groove; 203. Slot; 204. Cavity; 205. Limiting tube; 3. First longitudinal reinforcement; 301. Second longitudinal reinforcement; 302. Second grouting cavity; 303. Third grouting cavity. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Example 1: A dry connection structure with horizontal joint toothed groove for shear walls, as shown in Figures 1 to 3, includes a lower shear wall panel 1 and an upper shear wall panel 101. Both the lower and upper shear wall panels 1 and 101 have joint toothed grooves 202 at their bottoms. Multiple joint toothed blocks 2 are installed at the top of both panels. The tops of the multiple joint toothed blocks 2 have slots 203, and the slots 203 form protrusions that interlock with adjacent joint toothed grooves 202. The joint tooth block 2 is equipped with a continuous grouting component. At the horizontal joint of the shear wall, the groove in the joint tooth groove 202 engages with the protrusion formed by the adjacent tooth groove, allowing the joint tooth block 2 to simultaneously engage with two tooth grooves. Even if one tooth groove slides or misaligns due to force or other reasons, the other tooth groove can still effectively limit the joint tooth block 2, thereby reducing the risk of overall sliding and misalignment of the tooth block. Moreover, during grouting operations on the shear wall... The grout can be directly injected into the cavity 204 formed by the joint tooth block 2 and the tooth groove, and further penetrate into the first grouting cavity 201 pre-set inside the joint tooth block 2. As the grout solidifies and hardens, it not only fills the cavity 204, but also forms a firm limiting fixation on the joint tooth block 2, further enhancing the overall stability and shear resistance of the structure. It effectively avoids the joint tooth block 2 from sliding or misaligning during use, and solves the technical problem that due to manufacturing tolerances, installation errors, or material deformation, there is often an unavoidable gap between the protrusion and the tooth groove. The gap between the protrusion and the tooth groove will reduce the interlocking effect between them, making the connection structure more prone to relative sliding or misalignment when subjected to shear force. This relative sliding or misalignment will further weaken the shear resistance of the horizontal joint of the shear wall, increase the risk of structural failure under external forces such as earthquakes, and thus adversely affect the overall shear resistance of the horizontal joint of the shear wall.

[0021] Specifically, referring to Figures 1 and 3, the continuous grouting assembly includes a first grouting cavity 201, which extends from the surface of the joint tooth block 2 to the interior, forming a concave cavity.

[0022] Furthermore, referring to Figure 2, the lower shear wall panel 1 and the upper shear wall panel 101 have multiple cavities 204 inside, and the bottom of the cavity 204 is connected to the joint groove 202.

[0023] It is worth noting that, referring to Figure 3, a limiting tube 205 is installed at the top of the cavity 204. The top of the limiting tube 205 extends into the joint tooth block 2 and communicates with the first grouting chamber 201 inside the joint tooth block 2. When grouting is performed in the first grouting chamber 201 inside the joint tooth block 2, because the limiting tube 205 is located in the cavity 204 and maintains communication with the first grouting chamber 201, the injected grout will flow smoothly along this channel under pressure and directly penetrate into the cavity 20 of the bottom shear wall panel through the limiting tube 205. In section 4, after the horizontal joints of multiple shear wall panels are completed sequentially, the construction personnel only need to start grouting from the topmost shear wall panel. The grout can then automatically flow downwards under gravity and through the internal interconnection structure, filling the cavities 204 and joint teeth 2 of each shear wall panel in sequence. This achieves continuous grouting from top to bottom. This grouting method not only simplifies the operation process and reduces the number of grouting operations and manual intervention, but also improves the overall efficiency of the grouting operation and ensures the tight connection and overall stability between the various parts of the shear wall structure.

[0024] It is worth noting that, referring to Figures 1 and 2, the lower shear wall 1 and the upper shear wall 101 are provided with first longitudinal reinforcement 3 on both sides of the top, and the lower shear wall 1 and the upper shear wall 101 are provided with second grouting cavities 302 on both sides of the bottom.

[0025] It is worth mentioning that, referring to Figures 1 and 2, multiple second longitudinal bars 301 are provided at the top center of both the lower shear wall panel 1 and the upper shear wall panel 101. These multiple second longitudinal bars 301 are correspondingly arranged with the third grouting cavity 303 located in the central protrusion.

[0026] When using a dry connection structure with a shear wall horizontal joint toothed groove 202, at the horizontal joint of the shear wall, the groove in the joint toothed groove 202 engages with the protrusion formed by the adjacent toothed groove, allowing the joint toothed block 2 to simultaneously engage with two toothed grooves. Even if one toothed groove slides or misaligns due to force or other reasons, the other toothed groove can still effectively limit the joint toothed block 2, thereby reducing the risk of overall sliding and misalignment of the toothed block. Moreover, during grouting operations on the shear wall, the grout can be directly injected into the cavity 204 formed by the joint toothed block 2 and the toothed groove, and further penetrate into the pre-set first grouting cavity 201 inside the joint toothed block 2. As the grout solidifies and hardens, it not only fills the cavity 204, but also forms a firm limiting and fixing effect on the joint toothed block 2, further enhancing the overall stability and shear resistance of the structure, and effectively preventing the joint toothed block 2 from collapsing during use. In the event of slippage or misalignment, during grouting in the first grouting cavity 201 inside the joint tooth block 2, the limiting pipe 205, located within the cavity 204 and connected to the first grouting cavity 201, allows the injected grout to flow smoothly along this channel under pressure. It directly penetrates through the limiting pipe 205 into the cavity 204 of the bottom shear wall segment. This means that after the horizontal joints of multiple shear wall segments are completed sequentially, the construction personnel only need to start grouting from the topmost shear wall segment. The grout, relying on gravity and the internal interconnection structure, automatically flows downwards and sequentially fills the cavities 204 on each shear wall segment and the interior of the joint tooth block 2, achieving continuous grouting from top to bottom. This grouting method not only simplifies the operation process and reduces the number of grouting operations and manual intervention, but also improves the overall efficiency of the grouting operation, ensuring a tight connection and overall stability between the various parts of the shear wall structure.

[0027] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0028] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A shear wall horizontal joint tooth groove type dry connection structure comprising a lower shear wall piece (1) and an upper shear wall piece (101), characterized in that, Both the lower shear wall panel (1) and the upper shear wall panel (101) have joint grooves (202) at their bottoms. Both the lower shear wall panel (1) and the upper shear wall panel (101) have multiple joint blocks (2) installed at their tops. The multiple joint blocks (2) have slots (203) at their tops. The slots (203) engage with the protrusions formed between two adjacent joint grooves (202). The joint blocks (2) are equipped with continuous grouting components inside.

2. The shear wall horizontal joint tooth and groove dry connection structure of claim 1, wherein, The continuous grouting assembly includes a first grouting cavity (201), which extends from the surface of the joint tooth block (2) into the interior to form a concave cavity.

3. The shear wall horizontal joint tooth and groove dry connection structure of claim 1, wherein, The lower shear wall panel (1) and the upper shear wall panel (101) have multiple cavities (204) inside, and the bottom of the cavity (204) is connected to the joint groove (202).

4. The shear wall horizontal joint tooth and groove dry connection structure of claim 3, wherein, The cavity (204) is equipped with a limiting tube (205) at its top end. The top of the limiting tube (205) extends into the joint tooth block (2) and communicates with the first grouting cavity (201) inside the joint tooth block (2).

5. The shear wall horizontal joint toothed groove dry connection structure as described in claim 1, characterized in that, The lower shear wall panel (1) and the upper shear wall panel (101) are provided with first longitudinal reinforcement (3) on both sides of the top, and the lower shear wall panel (1) and the upper shear wall panel (101) are provided with second grouting cavities (302) on both sides of the bottom.

6. The shear wall horizontal joint toothed groove dry connection structure as described in claim 1, characterized in that, The lower shear wall panel (1) and the upper shear wall panel (101) are each provided with multiple second longitudinal bars (301) at the top center, and the multiple second longitudinal bars (301) are correspondingly provided with the third grouting cavity (303) opened in the middle protrusion.

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