Steel bar and sleeve high-precision positioning disc for prefabricated part splicing

Abstract

The utility model discloses a steel bar and sleeve high-precision positioning disc for prefabricated part splicing, which comprises a positioning disc main body, a plurality of hollow positioning steel pipes are arranged on the bottom surface of the positioning disc main body, and through holes for steel bars to pass through are arranged at the joints of the hollow positioning steel pipes and the bottom surface of the positioning disc main body. And a conical wedge block for positioning the reinforcing steel bar is detachably inserted into the hollow positioning steel pipe. The problems that in the prefabricated part assembling process, the reinforcing steel bars and the sleeves are difficult to center accurately, and deviation is difficult to correct are solved, it is guaranteed that in engineering prefabricated part assembling construction, accurate butt joint of the reinforcing steel bars and the sleeves is achieved within a short time, and the construction efficiency and quality are improved.

Description

Technical Field

[0001] The utility model relates to a steel bar and sleeve high-precision positioning plate for prefabricated component splicing, belonging to the technical field of water conservancy engineering. Background Art

[0002] In prefabricated concrete construction, the top steel bars of the lower segment components usually extend upward, and the grouting sleeves are pre-buried at the bottom of the upper segment components. When splicing, all the steel bars and sleeves are required to be aligned, the components fall down, all the steel bars are correspondingly inserted into the sleeves of the upper segment, and then the grouting material is poured to complete the splicing.

[0003] Among them, the precise alignment of the steel bar and the sleeve is the key to smooth splicing. The current technical standards for prefabricated and assembled concrete structures require that the difference between the inner diameter of the sleeve and the diameter of the steel bar be ≥10mm. In actual engineering construction, due to the positioning and construction errors of the steel bars and sleeves, the phenomenon of difficulty in aligning the steel bars and sleeves often occurs. It is necessary to spend a lot of effort on on-site rectification and correction, which seriously affects the construction progress and increases the construction cost. For steel bars with larger diameters (diameter greater than 22mm), the deviation is difficult to correct; it is often necessary to chisel out part of the concrete at the root of the steel bar, and with the help of a certain length of steel casing, 1-2 workers can complete it. When there are a large number of longitudinal bars in the connecting member segment, some construction units even directly cut off the ends of the steel bars, which directly affects the quality of the connection.

[0004] Therefore, ensuring the high-precision centering and positioning of the steel bars of prefabricated components is one of the key issues that determine the overall quality of prefabricated and assembled structures.

[0005] In order to ensure the accurate centering of the upper and lower segment steel bars and sleeves, a variety of steel bar positioning devices were designed in the project. The upper and lower segments of the positioning plate are set in pairs. The most common form of positioning plate is to open a hole in a thin steel plate and clamp it on the top of the lower segment. The lower part is tied and positioned with other steel bars. The embedded depth of steel bars of different diameters is usually not less than 600mm~1000mm. This practice is often used in wall construction with relatively small longitudinal reinforcement diameters. Its stability is slightly poor. Once individual deviations exceed the limit, it is relatively easy to correct. Prefabricated components such as reinforced concrete columns or bridge piers have large longitudinal reinforcement diameters and high centering requirements, so positioning fixtures are often used. The specific structure is to use a group of steel pipes with the same inner diameter as the matching sleeve. After positioning according to the position of the steel bars in the column pier, a steel plate is welded on the upper and lower parts, and then the tooling is put on the top of the steel bars of the lower segment prefabricated component. After the component is cast and finally set, the tooling is removed. Since steel pipes that fully match the diameter and position of the sleeve are used, all the centering requirements on site can be basically guaranteed. For the prefabricated piers assembled in pairs, a horizontal steel bridge frame is set up and connected with two positioning fixtures to ensure the accurate centering of the prefabricated segments of the paired piers with cross beams on the top. The above fixtures can ensure the centering of the steel bars within a deviation of 5mm.

[0006] However, prefabricated components in water conservancy projects are usually large in size and weight, with a large number of steel bars, a large steel bar diameter, and a large overhang length, and they need to be docked with the gate track at the same time. This places extremely high demands on the processing accuracy and hoisting docking accuracy of prefabricated components, which are generally required to be controlled within 2mm. It is obviously difficult to meet the accuracy requirements by using the steel plate opening method. In order to match the components, the integral positioning tooling is large in size and weight, and special hoisting equipment is required for loading and unloading. The precise positioning of the tooling itself also requires auxiliary measures. Since the sleeve positioning of the upper prefabricated component segment is not directly connected to the positioning tooling, it is difficult to further improve the positioning accuracy.

[0007] Therefore, it is necessary to design high-precision steel bars and sleeve positioning plates according to the characteristics of the longitudinal reinforcement in prefabricated components of water conservancy projects. Summary of the invention

[0008] The technical problem to be solved by the utility model is to provide a high-precision positioning plate for steel bars and sleeves for splicing prefabricated components, aiming to solve the problem that it is difficult to accurately align the steel bars and sleeves and the deviation is difficult to correct during the assembly of prefabricated components, so as to ensure that the steel bars and sleeves are accurately connected in a short time during the assembly construction of prefabricated components in the project, thereby improving construction efficiency and quality.

[0009] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0010] A high-precision positioning plate for steel bars and sleeves for splicing prefabricated components, comprising a positioning plate main body, a plurality of hollow positioning steel pipes are arranged on the bottom surface of the positioning plate main body, and through holes for steel bars to pass through are arranged at the connection between the hollow positioning steel pipes and the bottom surface of the positioning plate main body, and conical wedges for positioning the steel bars are detachably inserted in the hollow positioning steel pipes.

[0011] The aforementioned high-precision positioning plate for steel bars and sleeves used for splicing prefabricated components is characterized in that two conical wedges are detachably inserted into the hollow positioning steel pipe, and the conical wedges are semicircular structures.

[0012] The aforementioned high-precision positioning plate for steel bars and sleeves used for splicing prefabricated components is characterized in that an angle steel outer frame is provided at the edge of the positioning plate body, and a plurality of angle steel support members are provided inside.

[0013] The aforementioned high-precision positioning plate for steel bars and sleeves for splicing prefabricated components is characterized in that the position and number of the hollow positioning steel pipes correspond to the number and position of the steel bars to be positioned, and the inner diameter of the hollow positioning steel pipe is 8mm-10mm larger than the diameter of the steel bar, and the height of the hollow positioning steel pipe is not less than 2 times the inner diameter.

[0014] The aforementioned high-precision positioning plate of steel bars and sleeves for splicing prefabricated components is characterized in that the outer diameter of the hollow positioning steel pipe is 2mm-3mm smaller than the inner diameter of the sleeve.

[0015] The aforementioned high-precision positioning plate for steel bars and sleeves used for splicing prefabricated components is characterized in that positioning column through holes and concrete pouring ports are also provided on the bottom surface of the positioning plate body.

[0016] The beneficial effect of the utility model is that by arranging the hollow positioning steel pipe and the two semicircular conical wedges on the positioning plate, it is ensured that the steel bar is always in the center position in the hollow positioning steel pipe, and the design can meet the needs of steel bars of different diameters. By changing the insertion depth of the two semicircular conical wedges, the positioning of the steel bar can be achieved, so that the centering error of the steel bar and the sleeve of the upper and lower sections can be controlled within 1-2mm, reducing the need for on-site adjustment and greatly improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a high-precision positioning plate of steel bars and sleeves for splicing prefabricated components of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the prefabricated components of the utility model when being cast;

[0019] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0020] Figure 4 It is a schematic diagram of the structure of the lower prefabricated component of the utility model when being poured;

[0021] Figure 5 yes Figure 4 A magnified schematic diagram of B;

[0022] In the figure: 1. positioning plate; 2. steel pipe; 3. angle steel; 4. upper prefabricated section; 5. sleeve; 6. lower prefabricated section; 7. conical wedge; 8. steel bar. DETAILED DESCRIPTION

[0023] The utility model will be further described below in conjunction with the accompanying drawings. Example 1

[0024] like Figure 1-Figure 5 As shown, a high-precision positioning plate for steel bars and sleeves for splicing prefabricated components includes a positioning plate body 1, a plurality of hollow positioning steel tubes 2 are arranged on the bottom surface of the positioning plate body 1, and a through hole for steel bars 8 to pass through is arranged at the connection between the hollow positioning steel tubes 2 and the bottom surface of the positioning plate body 1, and a conical wedge block 7 for positioning the steel bars is detachably inserted in the hollow positioning steel tube 2.

[0025] When the lower segment 6 of the prefabricated component is cast, the steel bar 8 is passed through the hollow positioning steel pipe 2 and inserted into the hollow positioning steel pipe 2 using the conical wedge block 7. In this embodiment, two semicircular conical wedge blocks 7 are inserted in each hollow positioning steel pipe 2 to ensure that the steel bar 8 is located at the center of the hollow positioning steel pipe 2, ensuring that it can be smoothly inserted into the sleeve 5 when splicing with the upper segment 4 of the prefabricated component later.

[0026] An angle steel outer frame is arranged at the edge of the positioning plate body 1, and a plurality of angle steel support members 3 are arranged inside to ensure the strength of the entire positioning plate and avoid deformation during the casting process that affects the positioning accuracy.

[0027] In this embodiment, the position and number of the hollow positioning steel tube 2 correspond to the number and position of the steel bars to be positioned, and the inner diameter of the hollow positioning steel tube 2 is 8mm-10mm larger than the diameter of the steel bar. Due to the presence of the conical wedge 7, the inner diameter of the hollow positioning steel tube 2 can be appropriately enlarged to meet the needs of fixing steel bars 8 of different diameters and ensure that they are located at the center of the hollow positioning steel tube 2, thereby making the entire positioning plate more versatile and eliminating the need to customize different positioning plates according to steel bars of different diameters; and the height of the hollow positioning steel tube 2 is not less than 2 times the inner diameter, which can ensure the positioning effect of the steel bars 8. The outer diameter of the hollow positioning steel tube 2 is 2mm-3mm smaller than the inner diameter of the sleeve 5. As long as the sleeve 5 can be smoothly fitted onto the hollow positioning steel tube 2, the above size design can ensure that the centering error between the steel bar and the sleeve is controlled within 1-2mm.

[0028] The bottom surface of the positioning plate body 1 is also provided with a positioning column through hole (not shown in the figure) and a concrete pouring port (not shown in the figure). Positioning guide columns or positioning holes can be pre-embedded in the positioning column through hole as needed to facilitate positioning during later splicing. Example 2

[0029] A method for splicing prefabricated components, comprising the following steps: (i) casting the lower segment of the prefabricated component: placing a positioning plate on the top of the component, inserting all the steel bars into the hollow positioning steel pipe 2, inserting a conical wedge 7 into the hollow positioning steel pipe 2, and starting to cast concrete after ensuring that the steel bars are located at the center of the hollow positioning steel pipe 2. After the concrete reaches a predetermined strength, taking out the conical wedge 7 and removing the positioning plate; (ii) casting the upper segment of the prefabricated component: placing the same positioning plate at the bottom of the component, correspondingly fitting the sleeve on the hollow positioning steel pipe 2, and ensuring that all the grouting ports and outlets of the sleeve are The grouting ports are all facing the outside of the component, and then concrete pouring begins. After the concrete reaches a predetermined strength, the positioning plate is removed; (iii) Splicing of upper and lower prefabricated components: hoist the upper segment 4 of the prefabricated component above the lower segment 6 of the prefabricated component, so that all the steel bars are inserted into the sleeves accordingly, and grouting is performed from the grouting ports under each sleeve. When slurry flows out of the slurry outlet, grouting is stopped, and the grouting ports are closed by a plunger; in this embodiment, a transparent slurry indicator is connected to the slurry outlet of the sleeve. When slurry enters the transparent slurry indicator, grouting of the grouting port is stopped and the grouting port is closed, which is simple and convenient.

[0030] Through the innovative design of high-precision positioning plates for steel bars and sleeves for assembling prefabricated components, the problem of inconsistent positions of steel bars and sleeves at the upper and lower ends of the joints is effectively solved, ensuring construction quality and efficiency, and providing a reliable solution for prefabricated assembly construction in construction projects.

[0031] When the lower segment of the prefabricated component is cast, a conical positioning guide column is placed in the positioning column hole of the positioning plate; when the upper segment of the prefabricated component is cast, a positioning sleeve corresponding to the conical positioning guide column is placed in the positioning column hole of the positioning plate; when the upper and lower prefabricated components are spliced, the conical positioning guide column is inserted into the positioning sleeve to realize the mutual positioning of the upper and lower prefabricated components. For the splicing of large prefabricated components, the use of positioning guide columns can effectively improve the alignment efficiency during splicing.

[0032] To sum up, the utility model provides a high-precision positioning plate for steel bars and sleeves for prefabricated component splicing, which aims to solve the problem that it is difficult to accurately align the steel bars and sleeves and the deviation is difficult to correct during the assembly of prefabricated components, so as to ensure that the steel bars and sleeves can be accurately docked in a short time during the assembly construction of prefabricated components in the project, thereby improving construction efficiency and quality.

[0033] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-precision positioning plate for steel bars and sleeves for splicing prefabricated components, characterized in that: The invention comprises a positioning plate body (1), wherein a plurality of hollow positioning steel pipes (2) are arranged on the bottom surface of the positioning plate body (1), and through holes for steel bars (8) to pass through are arranged at the connection between the hollow positioning steel pipes (2) and the bottom surface of the positioning plate body (1), and conical wedges (7) for positioning the steel bars are detachably inserted in the hollow positioning steel pipes (2).

2. A high-precision positioning plate for steel bars and sleeves for splicing prefabricated components according to claim 1, characterized in that: Two conical wedge blocks (7) are detachably inserted into the hollow positioning steel pipe (2), and the conical wedge blocks (7) are semicircular structures.

3. A high-precision positioning plate for steel bars and sleeves for splicing prefabricated components according to claim 1 or 2, characterized in that: An angle steel outer frame is provided at the edge of the positioning plate body (1), and a plurality of angle steel support members (3) are provided inside.

4. A high-precision positioning plate for steel bars and sleeves for splicing prefabricated components according to claim 3, characterized in that: The position and number of the hollow positioning steel pipes (2) correspond to the number and position of the steel bars to be positioned, and the inner diameter of the hollow positioning steel pipe (2) is 8 mm to 10 mm larger than the diameter of the steel bars, and the height of the hollow positioning steel pipe (2) is not less than 2 times the inner diameter.

5. A high-precision positioning plate for steel bars and sleeves for splicing prefabricated components according to claim 4, characterized in that: The outer diameter of the hollow positioning steel pipe (2) is 2 mm to 3 mm smaller than the inner diameter of the sleeve (5).

6. A high-precision positioning plate for steel bars and sleeves for splicing prefabricated components according to claim 1, characterized in that: The bottom surface of the positioning plate body (1) is also provided with positioning column through holes and concrete pouring openings.

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