Internal buckling type grouting sleeve

Abstract

The utility model provides an inner buckle type grouting sleeve, a plurality of grouting sleeve bodies are arranged on the inner side wall of the lower portion of a prefabricated column, each grouting sleeve body comprises a grouting sleeve body, and the grouting sleeve body is provided with an up-down through opening; the buckles are arranged on the inner side wall of the grouting sleeve body, and the lower ends of in-column steel bars of the prefabricated column are inserted into the grouting sleeve body from the upper opening of the grouting sleeve body; a joint bar on the lower portion of the prefabricated column is inserted from the lower opening of the grouting sleeve body and connected with the buckle in a clamped mode. After the grouting material is injected, the tight mechanical occlusion effect is formed among the in-column steel bars of the prefabricated columns, the inner buckle structures and the joint bar grouting material, so that the connection strength and stability between the sleeve and the grouting material and between the grouting material and the in-column steel bars of the prefabricated columns are greatly enhanced.

Description

Technical Field

[0001] This utility model relates to an internally fastened grouting sleeve. Background Technology

[0002] In the construction of prefabricated assembled buildings, the installation and positioning of prefabricated columns is a critical step. Traditional prefabricated column installation usually requires a large number of diagonal braces to ensure the verticality and stability of the columns. This not only consumes a lot of manpower, material resources and time for the erection, adjustment and dismantling of diagonal braces, but also occupies a large space on the construction site, causing some interference to other construction processes, affecting construction efficiency and the safety and cleanliness of the site. Utility Model Content

[0003] The purpose of this utility model is to provide an internally fastened grouting sleeve.

[0004] To solve the above problems, this utility model provides an internally fastened grouting sleeve, comprising:

[0005] Multiple grouting sleeves are installed on the inner sidewall of the lower part of the precast column, wherein each grouting sleeve includes:

[0006] Grouting sleeve body, the grouting sleeve body having through openings at the top and bottom;

[0007] Multiple clips are provided on the inner wall of the grouting sleeve body. The lower end of the column reinforcement of the precast column is inserted into the grouting sleeve body through the upper opening of the grouting sleeve body. The reinforcing bars at the lower part of the precast column are inserted into the lower opening of the grouting sleeve body and are engaged with the clips.

[0008] Furthermore, in the aforementioned internally fastened grouting sleeves, each grouting sleeve is spaced apart circumferentially along the inner sidewall of the lower part of the precast column.

[0009] Furthermore, in the aforementioned internal snap-fit ​​grouting sleeve, the snaps inside each grouting sleeve body are symmetrically and spaced apart on the inner sidewall of the grouting sleeve body.

[0010] Furthermore, in the aforementioned internal snap-fit ​​grouting sleeve, each grouting sleeve body has four snaps arranged symmetrically at intervals.

[0011] Furthermore, in the aforementioned internally clipped grouting sleeve, each clip includes:

[0012] A base plate fixedly connected to the inner wall of the grouting sleeve body;

[0013] An upper fixed support is connected to the upper part of the substrate. A first limiter is provided on the upper corner of the upper fixed support on the side away from the substrate. A first rocker arm is fixed to the upper fixed support by a first cam. The first rocker arm is used to rotate around the first cam. The rotation position of one end of the first rocker arm is limited by the first limiter. A lower fixed support is connected to the lower part of the substrate. A second limiter is provided on the lower corner of the lower fixed support on the side away from the substrate. A second rocker arm is fixed to the lower fixed support by a second cam. The second rocker arm is used to rotate around the second cam. The rotation position of one end of the second rocker arm is limited by the second limiter.

[0014] A spring, one end of which is connected to a base plate between the upper fixed support and the upper fixed support; the other end of which is connected to one side of a short plate, the other side of which is connected to one side of a long plate, the other side of which is connected to a transmission connecting plate; the other ends of the first rocker and the second rocker are located on both sides of the spring and abut against the side of the long plate closest to the spring; the transmission connecting plate is used to engage with the end plate of the insert reinforcement at the bottom of the precast column.

[0015] Furthermore, in the aforementioned internally fastened grouting sleeve, the cross-section of the connecting transmission plate is a right-angled triangle, wherein one right-angled side of the right-angled triangle is the short side, and the other right-angled side is the long side, and the long side is connected to the other side of the long plate; the short side is engaged with the lower part of the periphery of the insertion rod end plate.

[0016] Furthermore, in the aforementioned internally fastened grouting sleeve, the angle between the short side and the hypotenuse of the right triangle is 55 to 65 degrees.

[0017] Furthermore, in the aforementioned internally fastened grouting sleeve, the diameter of the insert end plate is larger than the diameter of the insert at the bottom of the precast column, so as to form a position for engaging with the short side at the lower part of the periphery of the insert end plate that exceeds the width of the insert.

[0018] Furthermore, in the aforementioned internally fastened grouting sleeve, both ends of the first rocker arm are arc-shaped; both ends of the second rocker arm are arc-shaped.

[0019] Furthermore, in the aforementioned internally fastened grouting sleeve, the contact surface between the first limiter and the arc-shaped end of the first rocker arm is a correspondingly matching M-shaped arc; the contact surface between the second limiter and the arc-shaped end of the second rocker arm is a correspondingly matching M-shaped arc.

[0020] Compared with existing technologies, this utility model provides a precast column positioning device that eliminates the need for diagonal bracing, solving many problems associated with the reliance on diagonal bracing in precast column installation. This device enables rapid, accurate, and stable positioning of precast columns. The top-mounted internally clipped grouting sleeves are accurately installed at the bottom of the precast column during production. During installation, the internally clipped grouting sleeves and reinforcing bars within the precast column form an internal clipping mechanism, ensuring precise positioning. After grout is injected, a tight mechanical interlocking effect is formed between the internal reinforcing bars, the internal clipping structure, and the grout, significantly enhancing the connection strength and stability between the sleeves and the grout, as well as between the grout and the internal reinforcing bars of the precast column.

[0021] This utility model has the following advantages:

[0022] 1) Reduced bracing process: The traditional method of installing precast columns by relying on bracing has been abandoned. There is no need to build, adjust and dismantle bracing, which greatly simplifies the construction process, reduces the stacking of construction equipment and materials on the construction site, makes the construction site cleaner and more orderly, and facilitates the implementation of other construction processes.

[0023] 2) Efficient installation process: After the precast column is hoisted to the foundation, the initial connection between the bottom of the precast column and the positioning base (if any) can be achieved through simple operations, as well as the accurate docking of the grouting sleeve with internal buckle with the steel reinforcement inside the precast column. The subsequent grouting operation can quickly form a stable connection. The entire installation process is efficient and smooth, which can significantly shorten the installation time of the precast column and improve construction efficiency.

[0024] 3) Reliable connection quality: The mechanical interlocking of the internal grouting sleeve, the internal steel bars, the dowel bars and the grout, and the integral connection structure formed by the sleeve, the internal steel bars, the dowel bars and the grout ensure the high strength and high stability of the precast column connection, which can effectively withstand various loads during the use of the precast column, and ensure the overall quality and safety of the precast assembled building structure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the installation of an internally fastened grouting sleeve according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the insertion process of the lower reinforcing bar of the grouting sleeve according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram showing the lower reinforcing bar of a grouting sleeve after insertion according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of a buckle according to an embodiment of the present invention. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 4 As shown, this utility model provides an internally fastened grouting sleeve, comprising: a plurality of grouting sleeves disposed on the inner sidewall of the lower part of a precast column, wherein each grouting sleeve comprises:

[0031] Grouting sleeve body 1, the grouting sleeve body has a through opening at the top and bottom;

[0032] Multiple clips 2 are provided on the inner side wall of the grouting sleeve body 1. The lower end of the column reinforcement 4 of the precast column 3 is inserted into the grouting sleeve body 1 through the upper opening. The reinforcing bar 5 at the lower part of the precast column 3 is inserted into the grouting sleeve body through the lower opening and is engaged with the clips 2.

[0033] This invention provides a precast column positioning device that eliminates the need for diagonal bracing, solving many problems associated with the existing reliance on diagonal bracing for precast column installation. This device enables rapid, accurate, and stable positioning of precast columns. The top-mounted internally clipped grouting sleeve is accurately installed at the bottom of the precast column during production. During installation, the internally clipped grouting sleeves and reinforcing bars within the precast column form an internal clipping mechanism, ensuring precise positioning. After grout is injected, a tight mechanical interlocking effect is formed between the internal reinforcing bars, the internal clipping structure, and the grout in the reinforcing bars, greatly enhancing the connection strength and stability between the sleeves and the grout, as well as between the grout and the internal reinforcing bars of the precast column.

[0034] In one embodiment of the internal snap-fit ​​grouting sleeve of this utility model, each grouting sleeve 1 is arranged circumferentially along the inner sidewall of the lower part of the precast column 3.

[0035] In one embodiment of the internal snap-fit ​​grouting sleeve of this utility model, the snaps 2 inside each grouting sleeve body 1 are symmetrically and spaced apart on the inner sidewall of the grouting sleeve body 1. For example... Figures 2 to 4 As shown, for example, four snaps are arranged symmetrically at intervals inside each grouting sleeve body.

[0036] In one embodiment of the internally fastened grouting sleeve of this utility model, as follows: Figure 4 As shown, each buckle 2 includes:

[0037] A base plate fixedly connected to the inner wall of the grouting sleeve body 1;

[0038] An upper fixed support 8 is connected to the upper part of the substrate 7. A first limiter 14 is provided on the upper corner of the upper fixed support away from the substrate. A first rocker arm 12 is fixed on the upper fixed support by a first cam. The first rocker arm is used to rotate around the first cam 10. The rotation position of one end of the first rocker arm 12 is limited by the first limiter 14. A lower fixed support 9 is connected to the lower part of the substrate 7. A second limiter 15 is provided on the lower corner of the lower fixed support away from the substrate. A second rocker arm 13 is fixed on the lower fixed support by a second cam 11. The second rocker arm 13 is used to rotate around the second cam 11. The rotation position of one end of the second rocker arm 13 is limited by the second limiter 15.

[0039] Spring 17, one end of which is connected to base plate 7 between upper fixed support 8 and upper fixed support 9; the other end of spring 17 is connected to one side of short plate 18, the other side of short plate 18 is connected to one side of long plate 19, the other side of long plate 19 is connected to transmission connecting plate 16, the other ends of the first rocker and the second rocker are located on both sides of the spring and abut against the side of the long plate near the spring, and the transmission connecting plate 16 is used to engage with the end plate 6 of the insert rib 5 at the lower part of the precast column 3.

[0040] Here, the insert with the insert end plate at the top is inserted from the lower part of the grouting sleeve body. The insert end plate abuts against the inclined sides of each inner-locking connecting transmission plate and slides from the bottom to the top of the inclined side to compress the long plate, short plate, spring, first rocker arm, and second rocker arm; as Figure 2 As shown, when the end plate of the insert slides to the top of the inclined side, the rotational positions of the first and second rockers are limited by the corresponding first and second limiters; for example... Figure 3 As shown, when the end plate of the insert rod slides out of the top of the inclined side, the connecting transmission plate engages with the lower part of the periphery of the end plate of the insert rod, thereby positioning the insert rod.

[0041] like Figures 2 to 4 As shown, in one embodiment of the internal snap-fit ​​grouting sleeve of this utility model, the cross-section of the connecting transmission plate 16 is a right-angled triangle, wherein one right-angled side of the right-angled triangle is the short side, the other right-angled side is the long side, and the long side is connected to the other side of the long plate; the short side is engaged with the lower part of the periphery of the insertion rod end plate 6.

[0042] In one embodiment of the internally fastened grouting sleeve of this utility model, the angle between the short side and the hypotenuse of the right triangle is 55 to 65 degrees.

[0043] like Figures 2 to 4 As shown, in one embodiment of the internal snap-fit ​​grouting sleeve of this utility model, the diameter of the insert end plate 6 is larger than the diameter of the insert 5 at the bottom of the precast column 3, so that a position for engaging with the short side is formed at the lower part of the periphery of the insert end plate that exceeds the width of the insert.

[0044] like Figures 2 to 4 As shown, in one embodiment of the internally fastened grouting sleeve of this utility model, the two ends of the first rocker arm 12 are arc-shaped; the two ends of the second rocker arm 13 are arc-shaped.

[0045] like Figure 4 As shown, in one embodiment of the internal snap-fit ​​grouting sleeve of this utility model, the contact surface of the first limiter 14 and the arc-shaped end of the first rocker 12 is a corresponding matching M-shaped arc; the contact surface of the second limiter 15 and the arc-shaped end of the second rocker 13 is a corresponding matching M-shaped arc.

[0046] Here, the cross-sectional shape of the first limiter and the second limiter can be heart-shaped, so that the contact surface of the first limiter and the arc-shaped end of the first rocker arm is a corresponding M-shaped arc, and the contact surface of the second limiter and the arc-shaped end of the second rocker arm is a corresponding M-shaped arc.

[0047] Specifically, the construction method of the internal snap-fit ​​grouting sleeve of this utility model can be as follows:

[0048] (1) Precast column production stage

[0049] Installation of the internally clipped grouting sleeve: Within the mold of the precast column, precisely determine the position of the internally clipped grouting sleeve according to design requirements. Use specialized positioning clamps to fix the internally clipped grouting sleeve within the mold of the precast column, ensuring that the vertical and horizontal position deviations of the internally clipped grouting sleeve are controlled within a minimal range, for example, a vertical deviation of no more than ±1mm and a horizontal deviation of no more than ±2mm.

[0050] After temporarily fixing the grouting sleeve with internal buckle, check its fit with the precast column mold to ensure that the sleeve will not shift during concrete pouring. Spot welding or other methods can be used to further reinforce the sleeve and prevent it from moving during vibration.

[0051] (2) Construction site preparation stage

[0052] 1) Basic processing

[0053] During the construction of precast column foundations, the foundation surface must be leveled, with a flatness error controlled within ±3mm, to provide a flat foundation surface for the installation of precast columns. The reserved connection areas of the foundation should be roughened and cleaned to remove dust, oil, debris, etc., ensuring the cleanliness of the connection between the grouting sleeve and the foundation. This ensures effective adhesion between the grouting material and the foundation, improving the integrity and stability of the connection joint.

[0054] 2) Measurement and layout

[0055] After the basic treatment is completed, high-precision surveying instruments such as total stations and levels are used for measurement and layout work. According to the design drawings, the installation positions and elevation control lines of the precast columns are accurately measured and laid out, and marked on the foundation surface to provide accurate positioning basis for the hoisting and installation of the precast columns.

[0056] (3) Precast column hoisting and installation stage

[0057] 1) Hoisting operations

[0058] Select a crane of appropriate tonnage for the lifting operation of precast columns. Based on the weight, length and shape of the precast columns, select appropriate lifting tools and lifting points to ensure safety and stability during the lifting process.

[0059] 2) Positioning and docking

[0060] When the precast column is hoisted to a distance of approximately 500 mm above the foundation from the installation position, the descent is stopped. The position of the precast column is initially adjusted using a fine-tuning device installed on the crane hook or with manual assistance, so that the bottom of the precast column with an internally interlocking grouting sleeve is roughly aligned with the reinforcing bar at the reserved connection point on the foundation. Then, the precast column is slowly lowered so that the lower reinforcing bar is engaged with the internally interlocking sleeve connection hole inside the precast column, ensuring that all internal interlocks of the lower reinforcing bar and the grouting sleeve are stably engaged. Fine-tuning is performed by connecting diagonal braces to ensure that the horizontal position and verticality of the precast column meet the design requirements, with the horizontal position deviation not exceeding ±5 mm and the verticality deviation not exceeding ±3 mm.

[0061] In summary, this utility model has the following advantages:

[0062] 1) Reduced bracing process: The traditional method of installing precast columns by relying on bracing has been abandoned. There is no need to build, adjust and dismantle bracing, which greatly simplifies the construction process, reduces the stacking of construction equipment and materials on the construction site, makes the construction site cleaner and more orderly, and facilitates the implementation of other construction processes.

[0063] 2) Efficient installation process: After the precast column is hoisted to the foundation, the initial connection between the bottom of the precast column and the positioning base (if any) can be achieved through simple operations, as well as the accurate docking of the grouting sleeve with internal buckle with the steel reinforcement inside the precast column. The subsequent grouting operation can quickly form a stable connection. The entire installation process is efficient and smooth, which can significantly shorten the installation time of the precast column and improve construction efficiency.

[0064] 3) Reliable connection quality: The mechanical interlocking of the internal grouting sleeve, the internal steel bars, the dowel bars and the grout, and the integral connection structure formed by the sleeve, the internal steel bars, the dowel bars and the grout ensure the high strength and high stability of the precast column connection, which can effectively withstand various loads during the use of the precast column, and ensure the overall quality and safety of the precast assembled building structure.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Therefore, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model also intends to include these modifications and variations.

Claims

1. An internally fastened grouting sleeve, characterized in that, include: Multiple grouting sleeves are installed on the inner sidewall of the lower part of the precast column, wherein each grouting sleeve includes: Grouting sleeve body, the grouting sleeve body having through openings at the top and bottom; Multiple clips are provided on the inner wall of the grouting sleeve body. The lower end of the column reinforcement of the precast column is inserted into the grouting sleeve body through the upper opening of the grouting sleeve body. The reinforcing bars at the lower part of the precast column are inserted into the lower opening of the grouting sleeve body and are engaged with the clips.

2. The internally fastened grouting sleeve as described in claim 1, characterized in that, Each grouting sleeve is spaced apart circumferentially along the inner sidewall of the lower part of the precast column.

3. The internally fastened grouting sleeve as described in claim 1, characterized in that, The snaps inside each grouting sleeve body are symmetrically spaced on the inner wall of the grouting sleeve body.

4. The internally fastened grouting sleeve as described in claim 3, characterized in that, The snap fasteners inside each grouting sleeve are arranged symmetrically at intervals of 4.

5. The internally fastened grouting sleeve as described in claim 1, characterized in that, Each buckle includes: A base plate fixedly connected to the inner wall of the grouting sleeve body; An upper fixed support is connected to the upper part of the substrate. A first limiter is provided on the upper corner of the upper fixed support on the side away from the substrate. A first rocker arm is fixed to the upper fixed support by a first cam. The first rocker arm is used to rotate around the first cam. The rotation position of one end of the first rocker arm is limited by the first limiter. A lower fixed support is connected to the lower part of the substrate. A second limiter is provided on the lower corner of the lower fixed support on the side away from the substrate. A second rocker arm is fixed to the lower fixed support by a second cam. The second rocker arm is used to rotate around the second cam. The rotation position of one end of the second rocker arm is limited by the second limiter. A spring, one end of which is connected to a base plate between the upper fixed support and the upper fixed support; the other end of which is connected to one side of a short plate, the other side of which is connected to one side of a long plate, the other side of which is connected to a transmission connecting plate; the other ends of the first rocker and the second rocker are located on both sides of the spring and abut against the side of the long plate closest to the spring; the transmission connecting plate is used to engage with the end plate of the insert reinforcement at the bottom of the precast column.

6. The internally fastened grouting sleeve as described in claim 5, characterized in that, The cross-section of the connecting transmission plate is a right triangle, wherein one right-angled side is the short side and the other right-angled side is the long side, and the long side is connected to the other side of the long plate; the short side is engaged with the lower part of the periphery of the insert end plate.

7. The internally fastened grouting sleeve as described in claim 6, characterized in that, The angle between the shorter side and the hypotenuse of the right triangle is 55 to 65 degrees.

8. The internally fastened grouting sleeve as described in claim 6, characterized in that, The diameter of the end plate of the reinforcing bar is larger than the diameter of the reinforcing bar at the bottom of the precast column, so that a position for engaging with the short side is formed at the lower part of the periphery of the end plate of the reinforcing bar that exceeds the width of the reinforcing bar.

9. The internally fastened grouting sleeve as described in claim 5, characterized in that, The two ends of the first rocker arm are arc-shaped; the two ends of the second rocker arm are arc-shaped.

10. The internally fastened grouting sleeve as described in claim 9, characterized in that, The contact surface between the first limiter and the arc-shaped end of the first joystick is a corresponding matching M-shaped arc; the contact surface between the second limiter and the arc-shaped end of the second joystick is a corresponding matching M-shaped arc.

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