Grouting sleeve for connecting prefabricated parts

Abstract

The utility model discloses a grouting sleeve for connecting prefabricated parts, which relates to the technical field of road and bridge engineering and comprises a sleeve body, a cavity for accommodating steel bars and mortar is arranged in the sleeve body, a sealing ring is arranged at the top of the sleeve body, an expansion ring is arranged at the bottom of the sleeve body, and a lining pipe is arranged in the cavity. The lining pipe comprises a plurality of diameter-expanding sections and diameter-reducing sections which are alternately arranged, and the inner diameter of the diameter-expanding sections is larger than that of the diameter-reducing sections and larger than the outer diameter of the steel bars. By optimizing the structural design and material selection of the grouting sleeve, the problems of grout leakage and grouting defects in the prior art are effectively solved, uniform distribution of grouting materials is ensured, polyethylene is lined in the middle of the sleeve, special treatment is performed on the inner surface, uniform distribution of the grouting materials in the sleeve is ensured, gaps in the sleeve are reduced, and the service life of the sleeve is prolonged. And the strength and the stability of the whole structure are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of road and bridge engineering, in particular to a grouting sleeve for connecting precast components. Background Art

[0002] As a new building mode, the precast concrete structure is gradually applied in the road and bridge engineering due to its advantages such as fast construction speed and easy quality control. However, in actual construction, the reliability of the sleeve grouting technology for steel bar connection is the key to ensuring the overall stability of the structure. The sleeve grouting technology is a new type of steel structure connection method developed according to the development of engineering technology and actual needs. This technology overcomes the problems of small longitudinal steel bar connection part and insufficient strength of precast building components, and realizes the technical requirement of "assembly equivalent to cast-in-place". At present, in the road and bridge engineering, although the sleeve grouting technology performs outstandingly in the construction of bridge components, it still faces some challenges in the application of road and bridge construction. The sleeve grouting construction process belongs to the concealed project. Although the technicians operate properly, it is inevitable that there are voids in the internal grouting material of the sleeve grouting. At the same time, because the material properties of the grouting material itself have fluidity and micro-expansion characteristics, if the sealing is not timely, phenomena such as slurry leakage and easy occurrence of unsaturated grouting will occur. In addition, when the sleeve grouting defect is more than 30%, different degrees of grouting defects will occur. Through the research on the defect performance of the sleeve, under the same volume ratio of the grouting sleeve, there is a sorting rule of "sleeve end grouting defect ≈ sleeve tail grouting defect > sleeve middle grouting defect" in the bearing capacity of the test piece, which affects the mechanical properties of the sleeve grouting connector to varying degrees.

[0003] Therefore, the utility model proposes a new type of grouting sleeve to improve its fullness and density. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and to propose a grouting sleeve for connecting precast components.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A grouting sleeve for connecting precast components, including a sleeve body. A cavity for accommodating steel bars and mortar is arranged inside the sleeve body. A sealing ring is arranged at the top of the sleeve body, and an expansion ring is arranged at the bottom. An inner lining tube is arranged inside the cavity. The inner lining tube includes a plurality of alternately arranged enlarged diameter sections and reduced diameter sections, and the inner diameter of the enlarged diameter section is greater than the inner diameter of the reduced diameter section which is greater than the outer diameter of the steel bar.

[0007] Further, the cavity includes an installation cavity, a transition cavity and an inner lining cavity from top to bottom. The inner diameter of the installation cavity is adapted to the outer diameter of the steel bar. The inner diameter of the top of the transition cavity is adapted to the installation cavity, and the inner diameter of the bottom is adapted to the inner lining cavity.

[0008] Further, an outlet and a grouting port are provided on one side of the sleeve body. The height of the outlet is higher than that of the grouting port, and a sealing plug is detachably provided on the outlet and the grouting port.

[0009] Furthermore, the outlet is arranged at the position of the transition cavity, and the grouting port is arranged at the position of the inner layer cavity.

[0010] Further, the inner lining tube is made of polyethylene material, and an adhesive layer is provided between the inner lining tube and the cavity.

[0011] Further, one or more sealing rings are provided, and the inner diameter of the sealing ring is adapted to the outer diameter of the steel bar.

[0012] Advantageous Effects

[0013] Compared with the prior art, the advantageous effects of the present utility model are as follows: By optimizing the structural design and material selection of the grouting sleeve, the present utility model effectively improves the problems of slurry leakage and grouting defects existing in the prior art.

[0014] 1. Ensure uniform distribution of the grouting material. The inner lining of the middle part of the sleeve is made of polyethylene, and the inner surface is specially treated to ensure uniform distribution of the grouting material inside the sleeve, reduce the voids inside the sleeve, and improve the strength and stability of the overall structure.

[0015] 2. Through the tail reinforcement design (adding an expansion ring), the bonding force of the grouting material is improved, the connection strength between the sleeve and the precast component is enhanced, the stability of the overall structure is improved, and it is suitable for various construction environments.

[0016] 3. By adding an end sealing ring, the leakage of the grouting material is reduced, the compactness during the grouting process is ensured, and the quality and reliability of the connection part are improved.

[0017] 4. The design of the present utility model is applicable to the connection of precast components in various prefabricated building projects, and has wide applicability and popularization value. Description of the Drawings

[0018] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model.

[0019] Figure 1 It is a schematic internal structure diagram of the grouting sleeve.

[0020] Figure 2 It is a schematic application diagram of the grouting sleeve.

[0021] In the figure: 1. Steel bar; 2. Transition cavity; 3. Inner lining pipe; 4. Inner lining cavity; 5. Expansion ring; 6. Sealing ring; 7. Sealing plug; 8. Grout outlet; 9. Sleeve body; 10. Grouting port. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] Refer to Figure 1 - Figure 2 , a grouting sleeve for connecting precast components, including a sleeve body 9. A cavity for accommodating steel bars 1 and mortar is provided inside the sleeve body 9. A sealing ring 6 is provided at the top of the sleeve body 9, and an expansion ring 5 is provided at the bottom. An inner lining pipe 3 is provided inside the cavity. The inner lining pipe 3 includes a plurality of alternately arranged enlarged diameter sections and reduced diameter sections, and the inner diameter of the enlarged diameter section is greater than the inner diameter of the reduced diameter section and greater than the outer diameter of the steel bar.

[0025] To solve the end defects, by adding a sealing ring 6, improving the end shape, reducing the leakage of grouting material, and improving the grouting density; to solve the middle defects, by adding an inner lining and treating the inner surface to ensure the uniform distribution of grouting material and reduce the voids inside the sleeve; for the tail defects, through the tail reinforcement design (adding an expansion ring 5), enhancing the bonding force of the grouting material and improving the stability of the overall structure.

[0026] Among them, the sealing ring 6 at the end of the sleeve: One or more sealing rings 6 are added to the design of the end of the sleeve. The sealing ring 6 can be made of rubber or other elastic materials. It is installed on the outer surface of the end of the sleeve to make the end more tightly sealed and prevent the grouting material from leaking; the inner diameter of the sealing ring 6 at the end of the sleeve should match the outer diameter of the steel bar to ensure tight fit after the steel bar is inserted and prevent the grouting material from leaking.

[0027] The inner lining in the middle of the sleeve: The inner lining material uses polyethylene material. It has good fluidity and corrosion resistance, can effectively reduce the resistance of the grouting material during pouring, ensure the uniform distribution of the grouting material, and reduce the voids inside the sleeve.

[0028] The expanding ring 5 in an inward-expanding shape is designed at the tail of the sleeve, integrally formed with the sleeve or fixed by welding, and made of metal material. By increasing the contact area and friction at the tail, the bonding strength between the grouting material and the sleeve tail is improved, and the stability of the overall structure is enhanced.

[0029] In other preferred embodiments, the cavity includes an installation cavity, a transition cavity 2, and a lining cavity 4 from top to bottom. The inner diameter of the installation cavity is adapted to the outer diameter of the steel bar. The inner diameter of the top of the transition cavity 2 is adapted to the installation cavity, and the inner diameter of the bottom is adapted to the lining cavity 4.

[0030] Specifically, a slurry outlet 8 and a grouting port 10 are provided on one side of the sleeve body 9. The height of the slurry outlet 8 is higher than that of the grouting port 10. Sealing plugs 7 are detachably provided on the slurry outlet 8 and the grouting port 10.

[0031] Among them, the slurry outlet 8 is arranged at the position of the transition cavity 2, and the grouting port 10 is arranged at the position of the inner layer cavity. The slurry outlet 8 is designed in the upper middle part of the sleeve to ensure that air bubbles and excess grouting material can be smoothly discharged during the grouting process, preventing the generation of voids and bubbles. The grouting port 10 is designed in the middle lower part of the sleeve and is equipped with a sealing member to prevent the grouting material from overflowing and ensure that the grouting material can evenly fill the inside of the sleeve. The sealing plug 7 is made of a material with high sealing performance to ensure that there is no leakage during the grouting process and improve the overall density.

[0032] In other preferred embodiments, the lining tube 3 is made of polyethylene material. During installation, a special adhesive is used to paste the polyethylene (HDPE) lining on the inner wall of the sleeve in the middle of the sleeve. First, surface treatment is carried out to clean the surfaces of the inner wall of the sleeve and the HDPE lining to ensure no oil stains and dust; then, the adhesive is applied, and the adhesive is evenly applied on the contact surface between the inner wall of the sleeve and the HDPE lining; finally, bonding is carried out, and the HDPE lining is attached to the inner wall of the sleeve and kept under a certain pressure until the adhesive cures.

[0033] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A grouting sleeve for connecting precast components, characterized in that, It includes a sleeve body, and a cavity for accommodating steel bars and mortar is arranged inside the sleeve body. A sealing ring is arranged at the top of the sleeve body, and an expansion ring is arranged at the bottom. A lining tube is arranged inside the cavity. The lining tube includes a plurality of alternately arranged diameter-expanded sections and diameter-reduced sections, and the inner diameter of the diameter-expanded section is greater than that of the diameter-reduced section which is greater than the outer diameter of the steel bar.

2. The grouting sleeve for connecting precast components according to claim 1, characterized in that, The cavity includes an installation cavity, a transition cavity and a lining cavity from top to bottom. The inner diameter of the installation cavity is adapted to the outer diameter of the steel bar. The inner diameter of the top of the transition cavity is adapted to the installation cavity, and the inner diameter of the bottom is adapted to the lining cavity.

3. The grouting sleeve for connecting precast components according to claim 1 or 2, characterized in that, A slurry outlet and a grouting port are arranged on one side of the sleeve body. The height of the slurry outlet is higher than that of the grouting port, and sealing plugs are detachably arranged on the slurry outlet and the grouting port.

4. A grouting sleeve for connecting prefabricated components according to claim 3, characterized in that, The slurry outlet is arranged at the position of the transition cavity, and the grouting port is arranged at the position of the inner layer cavity.

5. A grouting sleeve for connecting precast components according to claim 1, characterized in that, The lining tube is made of polyethylene material, and an adhesive layer is arranged between the lining tube and the cavity.

6. The grouting sleeve for connecting precast components according to claim 1, characterized in that, One or more sealing rings are arranged, and the inner diameter of the sealing ring is adapted to the outer diameter of the steel bar.

Images