Assembly type shear wall structure connection full grouting sleeve

Abstract

The utility model provides an assembly type shear wall structure connection full-grouting sleeve which effectively solves the problems that when an existing full-grouting sleeve is used for steel bar connection, stress at the connecting position is unreasonable, and the steel bar connection structure is unreliable. According to the technical scheme, the device comprises a spinning-cone-shaped shell, and first slurry passing holes are formed in the upper portion and the lower portion of the middle of the shell; two inner shells are arranged in the outer shell, the two inner shells are bilaterally symmetrical and coaxially arranged, the diameter of the middle of each inner shell is larger than that of the two ends, and the outer circle face of the end, away from the middle of the outer shell, of each inner shell is attached to the inner side wall of the outer shell; second slurry passing holes are formed in the upper and lower sides of the left and right ends of the inner shell; the reinforcing steel bar connecting structure is ingenious in structure, sectional grouting is adopted, the contact length and the contact area between slurry and the reinforcing steel bars are increased, self-locking of all components of the connecting joint is achieved through expansion of the slurry in the hardening process, and firmness of the reinforcing steel bar connecting structure is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of steel bar connection technology in prefabricated buildings, and in particular to a fully grouted sleeve for connecting prefabricated shear wall structures. Background Technology

[0002] In the 1970s, Dr. Yu Zhanshu invented the grouting sleeve connection technology, which involves assembling precast components using a connection structure composed of a sleeve, grout, and reinforcing bars. The sleeve is thicker in the middle and thinner at both ends, allowing the grout to connect the reinforcing bars at both ends. Subsequently, domestic and international experts began extensive research on grouting sleeve technology, greatly promoting the development of prefabricated concrete structures and the process of building industrialization. Among existing fully grouted sleeves, those disclosed in patent documents CN113802772A (which enables self-alignment of the sleeve and reinforcing bars) and CN215484106U are representative. In use, both ends need to be sealed; grout is squeezed in from one end until it exits from the outlet at the other end to complete the grouting. This one-time grouting process can lead to separation between the reinforcing bars and the grout due to the expansion and deformation of the concrete grout during hardening. Furthermore, the stress distribution between the various components at the connection joint is unreasonable, resulting in an unstable reinforcing bar connection structure.

[0003] A prefabricated shear wall structure connection fully grouted sleeve is provided to solve the above problems. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the existing technology, this utility model provides a prefabricated shear wall structure connection fully grouted sleeve, which effectively solves the problems of unreasonable stress at the connection point and unreliable steel bar connection structure when the existing fully grouted sleeve is used for steel bar connection.

[0005] The technical solution includes a spindle-shaped outer shell with first pulp passage holes at the top and bottom of the middle section; inside the outer shell are two inner shells, which are symmetrical and coaxially arranged, with the diameter of the middle section of the inner shell being larger than the diameters at both ends, and the outer circular surface of the inner shell at the end away from the middle section of the outer shell fitting against the inner sidewall of the outer shell; and second pulp passage holes are provided on the top and bottom sides of both the left and right ends of the inner shell.

[0006] Preferably, the outer shell is divided into an upper outer shell and a lower outer shell, which are fixed together by a bolt and nut clamping structure.

[0007] Preferably, the inner shell is divided into an upper inner shell and a lower inner shell, and the two parts are fixed together by a bolt and nut clamping structure.

[0008] Preferably, a support plate is fixed on the inner shell sidewall, and the support plate can support the reinforcing bars.

[0009] Preferably, both the first and second slurry passages are provided with sealing blocks for easy sealing.

[0010] This utility model has an ingenious structure and adopts segmented grouting, which increases the contact length and area between the grout and the steel bars. By utilizing the expansion of the grout during the hardening process, the self-locking between the various components of the connection node is achieved, ensuring the reliability of the steel bar connection structure. Attached Figure Description

[0011] Figure 1 This is the front sectional view of the present invention.

[0012] Figure 2 This is a schematic diagram of the overall design of this utility model.

[0013] Figure 3 This is an exploded view of the present invention.

[0014] Figure 4 This is a diagram showing the state of the inner shell after it is connected to the reinforcing steel bars in this utility model.

[0015] Figure 5 for Figure 4 An exploded view of the state. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0017] Depend on Figures 1 to 5 The present invention includes a spindle-shaped outer shell 1, with first pulp passage holes 101 provided at the top and bottom of the middle of the outer shell 1; inside the outer shell 1 are two inner shells 2, which are symmetrical and coaxially arranged, with the diameter of the middle of the inner shell 2 being larger than the diameter of the two ends, and the outer circular surface of the end of the inner shell 2 away from the middle of the outer shell 1 fitting against the inner sidewall of the outer shell 1; and second pulp passage holes 201 are provided on the top and bottom sides of the left and right ends of the inner shell 2.

[0018] For ease of installation, the outer shell 1 is divided into two parts: an upper outer shell 102 and a lower outer shell 103. The upper outer shell 102 and the lower outer shell 103 are fixed together by a bolt and nut clamping structure.

[0019] For ease of installation, the inner shell 2 is divided into two parts: an upper inner shell 202 and a lower inner shell 203. The upper inner shell 202 and the lower inner shell 203 are fixed together by a bolt and nut clamping structure.

[0020] To ensure the steel bars are aligned, a support plate 204 is fixed on the side wall of the inner shell 2, which supports the steel bars.

[0021] Both the first grout passage 101 and the second grout passage 201 are equipped with sealing blocks 3 for easy sealing.

[0022] In use, the first step is to securely fix the inner shell 2 to the reinforcing steel. Specifically, the support plate 204 inside the inner shell 2 provides support for the reinforcing steel. When grouting is required, remove the sealing block 3 on the lower left side and the sealing block 3 on the upper right side of the inner shell 2, and then place the inner shell 2 onto the reinforcing steel. At this time, grout is injected through the second grout passage 201 on the lower left side until the grout overflows from the upper right side, forming a... Figure 4 , 5 As shown, after the grout inside the inner shell 2 has completely dried and hardened, proceed to the second step. In the second step, fix the two inner shells 2 and the reinforcing bars inside the outer shell 1 to form a reliable connection. Specifically: place the inner shells 2 at the ends of the two reinforcing bars inside the outer shell 1. The ends of the outer shell 1 are sealed by the two inner shells 2 and the reinforcing bars inside, meaning the cavity of the outer shell 1 is sealed at this point. Then, remove the sealing blocks 3 from the first grout passage holes 101 on the upper and lower sides of the outer shell 1, and pour the grout from the lower side until it overflows from the first grout passage hole 101 on the upper side. Allow it to stand and harden. During the hardening process, the expansion of the grout inside the outer shell 1 causes the inner shells 2 on both sides to shift outwards, further enabling the entire structure to form a self-locking mechanism, ensuring that the connection node has reliable connection strength.

[0023] The expansion effect of the grout injected in the second step above during hardening pushes the two inner shells 2 closer to the conical outer surface of the outer shell 1, with an outward tendency. This also allows the hardened grout inside the inner shells 2 to further clamp the reinforcing bars. Thus, when the reinforcing bar connection joint is under stress, the force among the various components at the connection point can be rationally distributed.

[0024] Based on the above, the support plate 204 inside the inner shell 2 can adopt a spiral structure. The spiral structure is also divided into upper and lower parts, which are fixed to the upper inner shell 202 and the lower inner shell 203 respectively. When the upper inner shell 202 and the lower inner shell 203 are spliced ​​and fixed together, the chambers of the two are divided into a spiral structure by the spiral structure.

Claims

1. A fabricated shear wall structure connecting full grout sleeve, characterized by, The application relates to a spinning cone-shaped shell (1), which is provided with first through-pulp holes (101) on the upper and lower parts of the middle part; the shell (1) is internally provided with two inner shells (2), the two inner shells (2) are symmetrically arranged left and right and coaxially, the diameter of the middle part of the inner shell (2) is larger than the diameter of the two ends, the outer circular surface of the end of the inner shell (2) far from the middle part of the shell (1) is attached to the inner side wall of the shell (1); the upper and lower sides of the left and right ends of the inner shell (2) are provided with second through-pulp holes (201).

2. The full grout sleeve for connecting the fabricated shear wall structure according to claim 1, wherein, The shell (1) is divided into an outer upper shell (102) and an outer lower shell (103), and the outer upper shell (102) and the outer lower shell (103) are fixed together through a bolt-nut clamping structure.

3. The full grout sleeve for connecting the fabricated shear wall structure according to claim 2, characterized in that, The inner shell (2) is divided into an inner upper shell (202) and an inner lower shell (203), and the inner upper shell (202) and the inner lower shell (203) are fixed together through a bolt-nut clamping structure.

4. The full grout sleeve for connecting the fabricated shear wall structure according to claim 1 or 3, characterized in that, The side wall of the inner shell (2) is fixed with a supporting plate (204), and the supporting plate (204) can support the steel bars.

5. The full grout sleeve for use in the connection of fabricated shear wall structures according to any one of claims 1 to 3, characterized in that The first through-pulp holes (101) and the second through-pulp holes (201) are provided with blocking blocks (3) for easy blocking.

Images