Dry-method connection prefabricated part, connection method and production method of dry-method connection prefabricated part

Abstract

The invention discloses a dry method connection prefabricated part, a connection method and a production method of the dry method connection prefabricated part. The dry method connection prefabricated part comprises a prefabricated body, reinforcing steel bars and one or more sets of steel plates. Two steel plates form a group, and more than one group of steel plates are correspondingly pre-buried on the upper end surface and the lower end surface of the prefabricated body respectively; more than one reinforcing steel bar is fixedly connected between the upper and lower corresponding steel plates; the steel plate is provided with more than one mounting hole for fastening and connecting adjacent prefabricated parts; the prefabricated body is formed by pouring concrete. During connection, the locking screws penetrate through the corresponding mounting holes between the adjacent prefabricated parts, and fastening connection is achieved through screw-thread fit of the nuts and the locking screws. The method is high in precision, the installation progress can be accelerated, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and in particular to a dry-connected prefabricated component, a connection method and a production method thereof. Background Art

[0002] At present, there are two main types of steel bar connections for prefabricated reinforced concrete components. First, the grouting sleeve connection system connects the steel bars between components through grouting sleeves and grouting materials, which is a wet connection. In the specific operation, the grouting sleeve after connecting the steel bars is first prefabricated in the component, and the grouting slurry mixed with water is injected into the grouting sleeve at the project site to connect the steel bars together. Second, the prefabricated hollow wall system connects the steel bars by pre-embedded metal corrugated pipes or mechanical connection under the hollow wall, and the steel bar connection is achieved by pouring concrete in the metal corrugated pipe or hollow wall, which is also a wet connection. The following problems exist with these wet-connected steel bars:

[0003] (1) The position and length accuracy of the connected steel bars are required to be high. When producing prefabricated components, the steel bars extending outside the prefabricated components are sealed and positioned by installing rubber rings on the mold. When pouring concrete, the position of the steel bars cannot be guaranteed, resulting in position deviations during the pouring process. When adjacent prefabricated components are connected, they cannot be accurately aligned.

[0004] (2) The steel bars extend from both ends of the prefabricated component body and are easily deformed by collision during transportation and storage on the construction site, resulting in inaccurate positioning of the steel bars and bringing difficulties to subsequent docking.

[0005] (3) Due to the low accuracy of the position and length of the steel bars extending from two adjacent prefabricated components, it is more difficult to align the components during hoisting, thus affecting the installation progress.

[0006] (4) Both the grouting sleeve connection system and the prefabricated hollow wall system are wet connections. Grouting materials or concrete are poured on site to fill the cavity and connect prefabricated components. However, there is a situation where the cavity is not fully filled and not solid, and it is difficult to detect. It is extremely difficult to remedy the incompletely filled or incompletely filled parts, causing quality risks.

[0007] (5) The project site construction is difficult, and the parts where wet pouring is performed are all concealed projects, which require high professionalism and sense of responsibility of the construction personnel, and the construction management is difficult.

[0008] (6) Wet connection has high requirements on construction environment, weather and operating temperature.

[0009] (7) During the construction process, wet connections require a lot of inspection and testing. Key inspection items such as grouting material strength, concrete strength and steel bar connection quality are all inspected after construction. There are many human factors that affect the quality and progress of the project. Summary of the invention

[0010] In view of this, the present invention provides a dry-process prefabricated component connection method and production method thereof, which has high precision, can speed up installation progress and improve construction efficiency.

[0011] The technical solution adopted by the present invention is as follows:

[0012] A dry-connected prefabricated component comprises a prefabricated body, steel bars and one or more sets of steel plates;

[0013] Two steel plates form a group, and more than one group of steel plates are respectively embedded in the upper end face and the lower end face of the prefabricated body; one or more steel bars are fixedly connected between the upper and lower corresponding steel plates; one or more mounting holes are provided on the steel plates for fastening and connecting adjacent prefabricated components; the prefabricated body is cast by concrete.

[0014] Furthermore, the prefabricated component also includes a high-strength screw, a straight thread sleeve, a weldable sleeve and a locking nut;

[0015] The high-strength screw and weldable sleeve are respectively fixed on the inner sides of the two corresponding upper and lower steel plates; one end of the steel bar is threadedly connected to the weldable sleeve, and the other end of the steel bar is fixedly connected to the high-strength screw through a straight threaded sleeve; the number of high-strength screws, weldable sleeves and straight threaded sleeves is consistent with that of steel bars; the two locking nuts are respectively threadedly connected to the high-strength screw and the steel bar and abut against the two end surfaces of the straight threaded sleeve.

[0016] Furthermore, the prefabricated component also includes a stud, a straight threaded sleeve, a weldable sleeve and a locking nut;

[0017] The two weldable sleeves are respectively fixed on the inner side surfaces of the two corresponding upper and lower steel plates, one end of the steel bar is threadedly connected to one of the weldable sleeves, one end of the stud is threadedly connected to the other weldable sleeve, and the other end of the steel bar is threadedly connected to the other end of the stud through a straight threaded sleeve; the number of studs and straight threaded sleeves is consistent with that of steel bars; the two locking nuts are respectively threadedly connected to the studs and steel bars and abut against the two end surfaces of the straight threaded sleeves.

[0018] Furthermore, the prefabricated component is a prefabricated wall.

[0019] Furthermore, the prefabricated components are prefabricated columns or beams.

[0020] Furthermore, the steel plate is a hollow plate.

[0021] The present invention also discloses a dry connection method for prefabricated components, which adopts the above-mentioned prefabricated components, uses locking screws to pass through corresponding installation holes between adjacent prefabricated components, and realizes fastening connection through the threaded cooperation of a nut and the locking screw.

[0022] Furthermore, gaskets are provided between adjacent prefabricated components, and the horizontality and verticality of the prefabricated components are adjusted by adjusting the thickness of the gaskets; at the same time, seat mortar is laid between adjacent prefabricated components to achieve the connection of concrete components and the elimination and sealing of gaps.

[0023] The present invention also discloses a method for producing dry-connected prefabricated components. Based on the above-mentioned prefabricated components, the production method comprises the following steps:

[0024] Step 1: Weld the high-strength screw and the weldable sleeve to two steel plates respectively, and fix the steel plates to the mold for producing prefabricated components by bolts for positioning;

[0025] Step 2: Tighten the steel bar with the processed steel wire head and the weldable sleeve, then connect the high-strength screw and the steel bar through the straight thread sleeve, and then tighten the locking nuts at both ends of the straight thread sleeve in turn, and complete all the steel bar connections in the prefabricated component according to the number of steel bars configured;

[0026] Step 3: pour concrete in the mold, and reserve fastening space inside the mounting hole on the steel plate;

[0027] Step 4: Remove the mold and bolts after molding.

[0028] The present invention also discloses another method for producing dry-connected prefabricated components. Based on the above-mentioned prefabricated components, the production method has the following steps:

[0029] Step 1: weld the weldable sleeves to two steel plates respectively, and fix the steel plates to the mold for producing prefabricated components by bolts for positioning;

[0030] Step 2: Tighten one end of the steel bar with the processed steel wire head with one of the weldable sleeves, and then thread one end of the stud with the other weldable sleeve; then connect the other end of the steel bar with the other end of the stud through a straight threaded sleeve; then tighten the locking nuts at both ends of the straight threaded sleeve in turn, and complete all the steel bar connections in the prefabricated component according to the number of steel bars configured;

[0031] Step 3: pour concrete in the mold, and reserve fastening space inside the mounting hole on the steel plate;

[0032] Step 4: Remove the mold and bolts after molding.

[0033] Beneficial effects:

[0034] 1. The steel bar connection in the prefabricated component of the present invention is a dry connection, that is, the two ends of the steel bar in the prefabricated component are directly fixed to the upper and lower corresponding steel plates, and the steel bar does not extend out of the prefabricated component, which is not only convenient for transportation and avoids the position deviation of the steel bar caused during transportation and storage on the construction site, but also has high precision. In addition, adjacent prefabricated components are directly fastened and connected through the steel plate mounting holes, which is convenient and fast, avoids the alignment of steel bars, has low requirements on the technical level of construction personnel, construction environment, and weather, speeds up the installation progress, and improves construction efficiency.

[0035] Secondly, the number of steel plates, the number of steel bars and the number of mounting holes of the present invention can be configured accordingly according to force calculation and actual operable space, so as to meet the mechanical performance requirements, and the form is diverse and widely applicable.

[0036] 2. Locking nuts are arranged at both ends of the straight thread sleeve of the present invention for locking, which can eliminate the residual deformation of the straight thread sleeve joint and improve the connection reliability.

[0037] 3. When the present invention is produced, since the steel plate, the mold and the connection between the two are all purely mechanical means, the position accuracy can be guaranteed during the processing.

[0038] 4. All connections can be inspected before pouring. The pouring of prefabricated components does not affect the quality of steel bar connections. Bolt connections are used directly on site. The connection quality of all connection points is intuitive, convenient and easy to detect, and the connection quality is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the structure of the first embodiment, wherein the internal structure is an exploded diagram.

[0040] Figure 2 It is a top view of the first embodiment.

[0041] Figure 3 It is a top view of the second embodiment.

[0042] Figure 4 It is a schematic diagram of the structure of the third embodiment, wherein the internal structure is an exploded diagram.

[0043] Figure 5 It is a top view of the third embodiment.

[0044] Figure 6 It is a schematic diagram of the structure of the fourth embodiment, wherein the internal structure is an exploded diagram.

[0045] Among them, 1-locking screw Ⅰ, 2-second steel plate Ⅱ, 3-first steel plate Ⅰ, 4-high-strength screw, 5-locking nut Ⅰ, 6-straight thread sleeve, 7-locking nut Ⅱ, 8-rebar, 9-weldable sleeve Ⅰ, 10-precast concrete wall panel, 11-locking screw Ⅱ, 12-second steel plate Ⅰ, 13-first steel plate Ⅱ, 14-precast concrete column, 15-weldable sleeve Ⅱ, 16-stud. DETAILED DESCRIPTION

[0046] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0047] The present invention provides a dry-connected prefabricated component, comprising a prefabricated body, a steel bar 8 and one or more steel plates;

[0048] Two steel plates form a group, and one or more steel plates in one group are respectively embedded in the upper end face and the lower end face of the prefabricated body; one or more steel bars 8 are fixedly connected between the upper and lower corresponding steel plates; one or more mounting holes are provided on the steel plate for fastening and connecting adjacent prefabricated components; the prefabricated body is cast by concrete.

[0049] Specifically, the prefabricated components also include a high-strength screw 4, a straight threaded sleeve 6, a steel bar 8, a weldable sleeve I9, a locking nut I5 and a locking nut II7; the high-strength screw 4 and the weldable sleeve I9 ​​are respectively fixed on the inner sides of the two corresponding upper and lower steel plates, one end of the steel bar 8 is threadedly connected to the weldable sleeve I9, and the other end of the steel bar 8 is fixed to the high-strength screw 4 through the straight threaded sleeve 6; the number of high-strength screw 4, weldable sleeve I9 ​​and straight threaded sleeve 6 is the same as that of steel bars 8; the locking nut I5 and the locking nut II7 are respectively threadedly connected to the high-strength screw 4 and the steel bar 8 and abut against the two end faces of the straight threaded sleeve 6.

[0050] The end faces of the high-strength screw 4 and the weldable sleeve Ⅰ 9 to be welded are processed with V-shaped welding grooves to ensure the welding quality of the joint.

[0051] Embodiment 1

[0052] In the first embodiment, the prefabricated component is a prefabricated concrete wall panel 10. Figure 1 , Figure 2 As shown, two groups of steel plates are used, which are placed on both sides. The steel plates are rectangular plates, wherein two steel bars 8 are fastened on each group of steel plates. Four mounting holes are provided on the upper and lower steel plates corresponding to each steel bar 8, which are used to install fasteners to achieve fixed connection of adjacent precast concrete wall panels 10.

[0053] Embodiment 2

[0054] In the second embodiment, the prefabricated component is a prefabricated concrete wall panel 10, such as Figure 3As shown, two groups of steel plates are used, which are placed on both sides. The steel plates are rectangular plates, wherein two steel bars 8 are fastened on each group of steel plates. Two mounting holes are provided on the upper and lower steel plates corresponding to both sides of each steel bar 8 for installing fasteners to achieve fixed connection of adjacent precast concrete wall panels 10.

[0055] Embodiment 3

[0056] In the third embodiment, the prefabricated component is a prefabricated concrete column 14, such as Figure 4 , Figure 5 As shown, a group of steel plates are used, and one steel plate is provided on the upper end face and the lower end face of the precast concrete column 14. The steel plate is a square plate as a whole, and the middle part is hollowed out; the steel bars 8 and the mounting holes are distributed in a circle around the steel plate, and four steel bars 8 are fastened on each side of the steel plate, and a mounting hole is provided on the upper and lower steel plates corresponding to the adjacent steel bars 8. Of course, the steel plate can also be a rectangular whole plate (not hollowed out), or a ring, or a circle.

[0057] It can be seen from the above three embodiments that the shape of the steel plates, the number of steel plates, the number of steel bars 8 and the number of mounting holes can be configured accordingly according to the force calculation and the actual operable space to achieve the mechanical performance requirements in various forms.

[0058] The prefabricated component may also be a prefabricated beam.

[0059] Embodiment 4

[0060] like Figure 6 As shown, in the fourth embodiment, the high-strength screw connected with the straight threaded sleeve in the first embodiment is replaced by a combination of a weldable sleeve II 15 and a stud 16. Specifically, the prefabricated component in the fourth embodiment also includes a stud 16, a straight threaded sleeve, a weldable sleeve I9, a weldable sleeve II 15, a locking nut I5 and a locking nut II 7; the weldable sleeve I9 ​​and the weldable sleeve II 15 are respectively welded to the inner side surfaces of the two corresponding upper and lower steel plates, one end of the steel bar 8 is threadedly connected to the weldable sleeve I9, one end of the stud 16 is threadedly connected to the weldable sleeve II 15, and the other end of the steel bar 8 is threadedly connected to the other end of the stud 16 through the straight threaded sleeve 6; the number of studs 16 and straight threaded sleeves 6 is the same as that of steel bars 8; the locking nut I5 and the locking nut II 7 are respectively threadedly connected to the stud 16 and the steel bar 8 and abut against the two end surfaces of the straight threaded sleeve 6.

[0061] The steel bar 8 can also be threadedly connected to the upper weldable sleeve II 15, one end of the stud 16 is threadedly connected to the lower weldable sleeve I 9, and the other end of the steel bar 8 is threadedly connected to the other end of the stud 16 through the straight threaded sleeve 6.

[0062] The end faces of the weldable sleeve I9 ​​and the weldable sleeve II15 joints to be welded are processed with V-shaped welding grooves to ensure the welding quality of the joints.

[0063] The present invention also provides a dry-connection method for prefabricated components, which uses the above-mentioned prefabricated components. After the prefabricated components are hoisted at the construction site, locking screws are used to pass through corresponding installation holes between adjacent prefabricated components, and the nuts and locking screw threads cooperate to achieve a tightening connection.

[0064] Based on the above-mentioned first embodiment, the steel plate embedded in the upper end surface of the prefabricated body is called the first steel plate, and the steel plate embedded in the lower end surface of the prefabricated body is called the second steel plate. Figure 1 The schematic diagram reflects that the middle precast concrete wall panel B is fixedly connected to the upper precast concrete wall panel A and the lower precast concrete wall panel C respectively.

[0065] The second steel plate Ⅱ2 of the upper precast concrete wall panel A corresponds to the first steel plate Ⅰ3 of the middle precast concrete wall panel B, and the mounting holes on the second steel plate Ⅱ2 correspond to the mounting holes on the first steel plate Ⅰ3; the locking screw Ⅰ1 is passed through the mounting holes on the second steel plate Ⅱ2 and the mounting holes on the first steel plate Ⅰ3, and the fastening connection is achieved through the threaded cooperation of the nut and the locking screw Ⅰ1. The head of the locking screw Ⅰ1 is located on the inner side of the first steel plate Ⅰ3, that is, the locking screw Ⅰ1 passes through the mounting holes on the first steel plate Ⅰ3 and the mounting holes on the second steel plate Ⅱ2 from bottom to top, and is threadedly connected with the nut located outside the second steel plate Ⅱ2. Of course, the head of the locking screw Ⅰ1 can also be located outside the second steel plate Ⅱ2 and installed from top to bottom. After the fastening is completed, the wall can be plastered at the fastening space.

[0066] The second steel plate Ⅰ12 of the middle precast concrete wall panel B corresponds to the first steel plate Ⅱ13 of the lower precast concrete wall panel C, and the mounting holes on the second steel plate Ⅰ12 correspond to the mounting holes on the first steel plate Ⅱ13; the locking screw Ⅱ11 is used to pass through the mounting holes on the first steel plate Ⅱ13 and the mounting holes on the second steel plate Ⅰ12 from bottom to top, and the nut located on the inner side of the second steel plate Ⅰ12 is threadedly matched with the locking screw Ⅱ11 to achieve a fastening connection. After the fastening is completed, the wall surface can be plastered at the fastening space.

[0067] Preferably, gaskets are provided between adjacent precast components (between the upper precast concrete wall panel A and the middle precast concrete wall panel B, and between the middle precast concrete wall panel B and the lower precast concrete wall panel C), and the horizontality and verticality of the precast components are adjusted by adjusting the thickness of the gaskets; at the same time, seat mortar is laid between adjacent precast components to achieve connection between concrete components, filling and sealing of gaps.

[0068] The present invention also provides a method for producing dry-connected prefabricated components. Based on the prefabricated components in the above-mentioned embodiments 1, 2, and 3, the production method has the following steps:

[0069] Step 1: Weld the high-strength screw 4 and the weldable sleeve Ⅰ 9 to two steel plates respectively, and fix the steel plates to the mold for producing prefabricated components by bolts for positioning;

[0070] Step 2: Tighten the steel bar 8 with the processed steel bar head and the weldable sleeve Ⅰ9, then connect the high-strength screw 4 and the steel bar 8 through the straight thread sleeve 6, and then tighten the locking nuts Ⅰ5 ​​and Ⅱ7 at both ends of the straight thread sleeve 6 in turn, and complete the connection of all the steel bars 8 in the prefabricated component according to the number of steel bars 8;

[0071] Step 3: pour concrete in the mold, and reserve fastening space inside the mounting hole on the steel plate;

[0072] Step 4: Remove the mold and bolts after molding.

[0073] The present invention also provides another method for producing dry-connected prefabricated components. Based on the prefabricated components in the fourth embodiment, the production method has the following steps:

[0074] Step 1: weld the weldable sleeve I9 ​​and the weldable sleeve II15 to two steel plates respectively, and fix the steel plates to the mold for producing prefabricated components by bolts for positioning;

[0075] Step 2: Tighten one end of the steel bar 8 with the processed steel bar thread head with the weldable sleeve Ⅰ9, and then thread one end of the stud 16 with the weldable sleeve Ⅱ15; then connect the other end of the steel bar 8 and the other end of the stud 16 through the straight thread sleeve 6; then tighten the locking nuts Ⅰ5 ​​and Ⅱ7 at both ends of the straight thread sleeve 6 in turn, and complete the connection of all the steel bars 8 in the prefabricated component according to the number of steel bars 8;

[0076] Step 3: pour concrete in the mold, and reserve fastening space inside the mounting hole on the steel plate;

[0077] Step 4: Remove the mold and bolts after molding.

[0078] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dry connection prefabricated component, characterized in that: It includes a prefabricated body, steel bars and one or more sets of steel plates; Two steel plates form a group, and more than one group of steel plates are respectively embedded in the upper end face and the lower end face of the prefabricated body; one or more steel bars are fixedly connected between the upper and lower corresponding steel plates; one or more mounting holes are provided on the steel plates for fastening and connecting adjacent prefabricated components; the prefabricated body is cast by concrete.

2. The dry connection prefabricated component according to claim 1, characterized in that: The prefabricated components also include high-strength screws, straight thread sleeves, weldable sleeves and locking nuts; The high-strength screw and weldable sleeve are respectively fixed on the inner sides of the two corresponding upper and lower steel plates; one end of the steel bar is threadedly connected to the weldable sleeve, and the other end of the steel bar is fixedly connected to the high-strength screw through a straight threaded sleeve; the number of high-strength screws, weldable sleeves and straight threaded sleeves is consistent with that of steel bars; the two locking nuts are respectively threadedly connected to the high-strength screw and the steel bar and abut against the two end surfaces of the straight threaded sleeve.

3. The dry connection prefabricated component according to claim 1, characterized in that: The prefabricated components also include studs, straight thread sleeves, weldable sleeves and locking nuts; The two weldable sleeves are respectively fixed on the inner side surfaces of the two corresponding upper and lower steel plates, one end of the steel bar is threadedly connected to one of the weldable sleeves, one end of the stud is threadedly connected to the other weldable sleeve, and the other end of the steel bar is threadedly connected to the other end of the stud through a straight threaded sleeve; the number of studs and straight threaded sleeves is consistent with that of steel bars; the two locking nuts are respectively threadedly connected to the studs and steel bars and abut against the two end surfaces of the straight threaded sleeves.

4. The dry connection prefabricated component according to claim 1, characterized in that: The prefabricated component is a prefabricated wall.

5. The dry connection prefabricated component according to claim 1, characterized in that: The prefabricated components are prefabricated columns or beams.

6. The dry connection prefabricated component according to any one of claims 1 to 5, characterized in that: The steel plate is a hollow plate.

7. A method for connecting prefabricated components by dry connection, characterized in that: The prefabricated components as described in claims 1 to 6 are used, locking screws are used to pass through corresponding mounting holes between adjacent prefabricated components, and a fastening connection is achieved through the threaded cooperation between a nut and the locking screw.

8. The method for connecting prefabricated components by dry connection as claimed in claim 7, characterized in that: Gaskets are arranged between adjacent prefabricated components, and the horizontality and verticality of the prefabricated components are adjusted by adjusting the thickness of the gaskets; at the same time, seat mortar is laid between adjacent prefabricated components to achieve the connection of concrete components and the elimination and sealing of gaps.

9. A method for producing dry-connected prefabricated components, characterized in that: Based on the prefabricated component according to claim 2, the production method comprises the following steps: Step 1: Weld the high-strength screw and the weldable sleeve to two steel plates respectively, and fix the steel plates to the mold for producing prefabricated components by bolts for positioning; Step 2: Tighten the steel bar with the processed steel wire head and the weldable sleeve, then connect the high-strength screw and the steel bar through the straight thread sleeve, and then tighten the locking nuts at both ends of the straight thread sleeve in turn, and complete all the steel bar connections in the prefabricated component according to the number of steel bars configured; Step 3: pour concrete in the mold, and reserve fastening space inside the mounting hole on the steel plate; Step 4: Remove the mold and bolts after molding.

10. A method for producing dry-connected prefabricated components, characterized in that: Based on the prefabricated component according to claim 3, the production method comprises the following steps: Step 1: weld the weldable sleeves to two steel plates respectively, and fix the steel plates to the mold for producing prefabricated components by bolts for positioning; Step 2: Tighten one end of the steel bar with the processed steel wire head with one of the weldable sleeves, and then thread one end of the stud with the other weldable sleeve; then connect the other end of the steel bar with the other end of the stud through a straight threaded sleeve; then tighten the locking nuts at both ends of the straight threaded sleeve in turn, and complete all the steel bar connections in the prefabricated component according to the number of steel bars configured; Step 3: pour concrete in the mold, and reserve fastening space inside the mounting hole on the steel plate; Step 4: Remove the mold and bolts after molding.

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