Modularized steel bar truss mounting method

Abstract

The invention relates to the technical field of concrete structure construction, in particular to a modular steel bar truss mounting method, and provides a fixing device which is composed of an anti-sliding buckle and a connecting pair to solve the problems that in an existing method, the procedure is complex and the cost is increased due to bolt dismounting. The anti-sliding buckle is a non-plasticized polyvinyl chloride prefabricated part, comprises a hollow circular truncated cone body and a wing ring and is fixed to the bottom die through a self-tapping screw. The connecting piece pair is a special-shaped C-shaped cuboid, a bottom protruding circular truncated cone body is matched with a buckle, and socket connection is achieved through vertical pushing. The mounting method comprises the following steps: punching and positioning a bottom die (the deviation is + / -3mm), fixing a buckle (the tensile strength of a screw is greater than or equal to 2.5 kN), positioning a steel bar truss, mounting a connecting piece pair (the distance is adjustable when the distance is 500mm), and checking the precision. According to the scheme, bolt disassembly and assembly are avoided, the bottom die and the device are disassembled synchronously, efficiency is improved by more than 30%, and cost is reduced by 15%. The size material supports prefabrication adjustment, is adaptive to the whole scene, is stable in structure and high in repeated utilization rate, and meets the compatible requirements of fabricated buildings.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of concrete structure construction, in particular to a modular steel bar truss mounting method. BACKGROUND

[0002] The truss floor support plate is a prefabricated component widely used in the field of building, and currently the truss floor support plate is mainly divided into two categories of demountable type and recyclable type, and the core feature is that the bottom mold can be disassembled and reused after construction, and the efficiency advantage and environmental protection characteristics of the fabricated building are combined.

[0003] The prior art discloses a detachable bottom mold steel bar truss floor support plate which comprises a bottom mold, a plurality of groups of steel bar trusses, a plurality of groups of sliding grooves, clamping seats, clamping grooves, steel bar trusses, a plurality of groups of screw grooves, tensioning screws, a plurality of groups of limiting grooves, a first sliding plate and a second sliding plate.

[0004] According to the related technology in the above, the tensioning screw is passed through the bottom mold and then detachably fixedly connected with the steel bar truss, after the concrete pouring is completed, the concrete adhered to the surface of the tensioning screw needs to be removed first, then the fastening bolt on the tensioning screw is removed, force is applied to the bottom mold to make the bottom mold move along the axial direction of the tensioning screw, so that the bottom mold is disassembled, so that more processes are required for the disassembly of the bottom mold, a large number of workers need to be put into the disassembly of the bottom mold, which not only leads to high disassembly cost of the bottom mold, but also affects the overall construction progress. SUMMARY

[0005] In order to facilitate the quick mounting and dismounting between the bottom mold and the steel bar truss to improve the construction efficiency, the application provides a modular steel bar truss mounting method.

[0006] The modular steel bar truss mounting method provided by the application adopts the following technical scheme: A modular steel bar truss mounting method comprises the following steps: S1: center line and hole position boundary of the anti-slip buckle are calibrated on the bottom mold; S2: a hole matching the anti-slip buckle is opened on the bottom mold by using a template hole opener; S3: the anti-slip buckle is fixedly embedded in the hole of the bottom mold by using a self-tapping screw; S4: the steel bar truss is positioned and placed according to the line marking; S5: the connecting piece is clamped into the lower chord of the steel bar truss, and the convex circular cone body in the connecting piece is pushed into the anti-slip buckle to complete the socket connection; The anti-slip buckle is an inverted hollow circular cone body and comprises a wing ring flush with the upper surface of the bottom mold; the connecting piece comprises a C-shaped groove and a convex circular cone body matching the anti-slip buckle.

[0007] By adopting the above technical scheme, after the bottom mold is laid, the center lines of the floor axes and the anti-slip buckles are marked on the bottom mold by the measurer, the center points of the anti-slip buckles are marked on the bottom mold with a inkpot or a marker according to the layout structure, the hole boundaries are marked with cross lines, then the template hole opener is used to open holes on the bottom mold according to the layout results, the appropriate opening die is selected according to the size of the anti-slip buckle, the opening size is 30mm, the hole depth is controlled to be 10mm by using the electric drill positioner, after the opening is completed, the excess burrs are cleaned with a sander, then the wood chips in the hole are cleaned with a dust collector, then the anti-slip buckle is embedded in the hole of the bottom mold, the anti-slip buckle is permanently fixed with the bottom mold by using self-tapping screws, the tensile bearing capacity of the self-tapping screw connection point is not less than 2.5KN, so that when the bottom mold is removed, the anti-slip buckle falls off with the bottom mold as a whole, achieving the purpose of multiple cycles, after the installation of the anti-slip buckle is completed, the overall precision is checked to ensure that the longitudinal and transverse horizontal position deviation values of the anti-slip buckle meet the requirements, the installation height difference value meets the requirements, then according to the positioning line on the bottom mold, the steel bar truss is accurately placed in the specified position, in order to ensure that the structure stress meets the design and specification requirements, the center line of the steel bar truss and the position of the lower chord must coincide with the layout marks, then the C-shaped groove is inserted into the left and right ends of the lower chord of the steel bar truss, the installation spacing of the adjacent two C-shaped grooves is adjusted according to the stress requirements of different structures, after the C-shaped groove and the steel bar truss are fixed, the convex circular cone body below the C-shaped groove is pushed vertically into the corresponding anti-slip buckle, at this time the anti-slip buckle has been permanently fixed with the bottom mold, when pushing in, if a relatively obvious sound is heard when the anti-slip buckle tightens, it means that the convex circular cone body and the anti-slip buckle are tightly and closely connected, after the installation is completed, the size, position and quantity of the connecting structure and the steel bar truss are detected by using measuring tools, whether the flatness and perpendicularity deviation is within the allowable range, whether the variety, specification, model, quantity and spacing meet the design requirements, if all are qualified, the installation is completed; the designed modular steel bar truss installation method connects the convex circular cone body and the anti-slip buckle by pushing and inserting, which reduces the operation of removing the fastening bolt in advance when the bottom mold is removed in the prior art by connecting through a screw and a nut, which facilitates the rapid installation and disassembly of the bottom mold and the steel bar truss to improve the construction efficiency, the size and material of the anti-slip buckle, the C-shaped groove and the convex circular cone body can be adjusted in the factory prefabrication link according to different application scenarios, structure types, building purposes, mechanical properties and process properties, covering all-scenario adaptive prefabrication, meeting multiple functional requirements, full-working-condition adaptation, achieving organic unity of full-life-cycle compatibility and functional extensibility; through the flush design of the wing ring and the bottom mold, the stress concentration of the buckle edge during concrete pouring is avoided.

[0008] In a specific implementation, the size and material of the anti-sliding buckle and the connecting piece pair can be parameterized and adjusted in the factory prefabrication link based on application scenarios, structure types, and mechanical properties.

[0009] By adopting the above technical solutions, the anti-sliding buckle and the connecting piece pair with the size and material that can be parameterized and adjusted in the factory prefabrication link based on application scenarios, structure types, and mechanical properties can adapt to the use requirements of different scenarios.

[0010] In a specific implementation, the upper port diameter of the anti-sliding buckle is 20 mm, the lower port diameter is 15 mm, the wing ring width is 5 mm, the thickness is 3 mm, and the overall height is 10 mm. The C-shaped groove of the connecting piece pair is formed with a 10 mm insertion groove for fixing the lower chord, and the lower end of the insertion groove is reserved for 15 mm for controlling the thickness of the concrete protective layer.

[0011] By adopting the above technical solutions, the anti-sliding buckle with an upper port diameter of 20 mm, a lower port diameter of 15 mm, a wing ring width of 5 mm, a thickness of 3 mm, and an overall height of 10 mm can be matched with the connecting piece pair formed with a 10 mm insertion groove and the insertion groove with a lower end reserved for 15 mm for controlling the thickness of the concrete protective layer to realize the detachable fixed connection between the steel truss and the bottom mold.

[0012] In a specific implementation, the anti-sliding buckle is made of unplasticized polyvinyl chloride material by integrated stamping, and is connected with the bottom mold by self-tapping screws. The tensile bearing capacity of the self-tapping screw connection point is ≥2.5 kN.

[0013] By adopting the above technical solutions, the anti-sliding buckle made of unplasticized polyvinyl chloride material by integrated stamping and connected with the bottom mold by self-tapping screws, and the tensile bearing capacity of the self-tapping screw connection point is ≥2.5 kN, which can ensure stable connection between the bottom mold and the anti-sliding buckle while reducing the manufacturing cost of the anti-sliding buckle, and ensure that the anti-sliding buckle does not separate from the bottom mold during disassembly.

[0014] In a specific implementation, the installation spacing parameters between adjacent two connecting piece pairs can be adjusted based on structural stress requirements.

[0015] By adopting the above technical solutions, the connecting piece pair with installation spacing parameters that can be adjusted based on structural stress requirements can adapt to bottom molds with different structural stress requirements.

[0016] In a specific implementation, the longitudinal and transverse position deviation of the anti-sliding buckle is controlled to be ±3 mm, the installation height deviation is ±1 mm, and the anti-sliding buckle is measured and accepted by measuring tools after installation.

[0017] By adopting the technical scheme, the longitudinal and transverse position deviation control is ±3 mm, the installation height deviation is ±1 mm, and the anti-slip buckle which needs to be measured and accepted by a measuring tool after installation can guarantee the installation accuracy of the anti-slip buckle and the position accuracy of the steel bar truss.

[0018] To sum up, the present application includes at least one of the following beneficial technical effects: 1. The designed modular steel bar truss installation method reduces the operation of removing the fastening bolt in advance when the bottom mold is removed by connecting the protruding circular cone body and the anti-slip buckle in a push-in socket manner, synchronously removes the bottom mold and the fixing device, improves the construction efficiency by more than 30%, reduces the labor cost by 15%, facilitates the rapid installation and disassembly between the bottom mold and the steel bar truss to improve the construction efficiency, the size, material, etc. of the anti-slip buckle, C-shaped groove and protruding circular cone body can be adjusted in the factory prefabrication link according to different application scenarios, structure types, building purposes, mechanical properties and process properties, covering full-scenario adaptive prefabrication, meeting multi-functional requirements, full-working-condition adaptation, achieving organic unity of full-life-cycle compatibility and functional extensibility, and having the characteristics of structural stability, high reusability, etc. to meet the full-life-cycle compatibility requirements of prefabricated buildings; the wing ring is designed flush with the bottom mold to avoid stress concentration at the edge of the buckle during concrete pouring.

[0019] 2. The designed modular steel bar truss installation method can cooperate with the connecting piece pair having a 10mm insertion groove and a 15mm lower end reserved for controlling the thickness of the concrete protective layer to realize the detachable fixed connection between the steel bar truss and the bottom mold.

[0020] 3. The designed modular steel bar truss installation method uses unplasticized polyvinyl chloride material through integrated stamping forming, and connects with the bottom mold through self-tapping screws, and the self-tapping screw connection point has a tensile bearing capacity of ≥2.5kN, which can guarantee the stable connection between the anti-slip buckle and the bottom mold on the basis of reducing the manufacturing cost of the anti-slip buckle, and ensure that the anti-slip buckle does not separate from the bottom mold during disassembly later. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the anti-slip buckle and the buckling protrusion in the embodiments of the present application.

[0022] Figure 2 is a structural schematic view after further adding a wing ring on the basis of Figure 1 .

[0023] Figure 3 is a structural schematic diagram of a connecting piece pair in the embodiment of the application.

[0024] Figure 4 is a mounting structure schematic diagram of the anti-slip buckle and the connecting piece pair in the embodiment of the application.

[0025] Figure 5 is an assembly state schematic diagram of the anti-slip buckle and the bottom mold after being fixed by self-tapping screws in the embodiment of the application.

[0026] Figure 6 is a general installation state schematic diagram of the modularized steel bar truss installation method in the embodiment of the application.

[0027] Legend: 1, bottom mold; 2, anti-slip buckle; 3, steel bar truss; 31, top rod; 32, lower chord; 33, connecting rod; 4, connecting piece pair; 41, C-shaped groove; 42, protruding circular cone body; 5, wing ring. DETAILED DESCRIPTION

[0028] The following will be described in detail in combination with the accompanying Figures 1-6 The application will be further described in detail.

[0029] The embodiment of the application discloses a modularized steel bar truss installation method.

[0030] Reference Figures 1-6 , a modularized steel bar truss installation method comprises: S1: center lines of the anti-slip buckles 2 and hole position boundaries are demarcated on the bottom mold 1; S2: a hole matching the anti-slip buckles 2 is opened on the bottom mold 1 by using a template hole opener; S3: the anti-slip buckles 2 are inlaid and fixed in the holes of the bottom mold 1 by self-tapping screws; S4: the steel bar truss 3 is positioned and placed according to the line marking; S5: the connecting piece pair 4 is clamped into the lower chord 32 of the steel bar truss 3, the protruding circular cone body 42 in the connecting piece pair 4 is pushed into the anti-slip buckle 2 to complete the socket connection; Wherein, the anti-slip buckle 2 is an inverted hollow circular cone body, and contains a wing ring 5 flush with the upper surface of the bottom mold 1; the connecting piece pair 4 contains a C-shaped groove 41 and a protruding circular cone body 42 matching the anti-slip buckle 2.

[0031] Specifically, the upper end of the anti-slip buckle 2 is 20mm in diameter, the lower end is 15mm in diameter, the wing ring 5 is 5mm in width, 3mm in thickness, and 10mm in overall height, and the C-shaped groove 41 of the connecting piece 4 is formed with a 10mm insertion groove for fixing the lower chord 32, and the lower end of the insertion groove is reserved for 15mm for controlling the thickness of the concrete protective layer; through the anti-slip buckle 2 with an upper end diameter of 20mm, a lower end diameter of 15mm, a wing ring 5 with a width of 5mm, a thickness of 3mm, and an overall height of 10mm, the connecting piece 4 with a 10mm insertion groove and a 15mm reserved lower end of the insertion groove for controlling the thickness of the concrete protective layer can be matched to realize the detachable fixed connection between the steel truss 3 and the bottom mold 1.

[0032] Further, the anti-slip buckle 2 is made of unplasticized polyvinyl chloride material by integrated stamping, and is connected with the bottom mold 1 by self-tapping screws, and the tensile bearing capacity of the self-tapping screw connection point is ≥2.5kN; through the anti-slip buckle 2 made of unplasticized polyvinyl chloride material by integrated stamping, and connected with the bottom mold 1 by self-tapping screws, and the tensile bearing capacity of the self-tapping screw connection point is ≥2.5kN, the stable connection between the bottom mold 1 can be ensured on the basis of reducing the manufacturing cost of the anti-slip buckle 2, and the anti-slip buckle 2 can be ensured not to be separated from the bottom mold 1 during disassembly.

[0033] Further, the installation spacing parameters between the two adjacent connecting pieces 4 can be adjusted based on the structural stress requirements, and the installation spacing parameters of the connecting piece 4 can be adjusted based on the structural stress requirements, which can adapt to the bottom mold 1 with different structural stress requirements.

[0034] Specifically, the longitudinal and transverse position deviation of the anti-slip buckle 2 is controlled to be ±3mm, the installation height deviation is ±1mm, and the anti-slip buckle 2 is measured and accepted after installation by measuring tools; through the longitudinal and transverse position deviation of the anti-slip buckle 2 controlled to be ±3mm, the installation height deviation is ±1mm, and the anti-slip buckle 2 needs to be measured and accepted after installation by measuring tools, the installation accuracy of the anti-slip buckle 2 can be ensured, and the position accuracy of the steel truss 3 can be ensured.

[0035] More specifically, the size and material of the anti-slip buckle 2 and the connecting piece 4 can be parameterized adjusted based on application scenarios, structure types, and mechanical properties in the factory prefabrication link; through the size and material of the anti-slip buckle 2 and the connecting piece 4 which can be parameterized adjusted based on application scenarios, structure types, and mechanical properties in the factory prefabrication link, the use demand of different scenarios can be adapted.

[0036] Specifically, the anti-sliding buckle 2 is provided with a plurality of deformation grooves, the plurality of deformation grooves separate the side wall of the anti-sliding buckle 2 into a plurality of independent deformation portions, the deformation portions have a certain elasticity, the plurality of deformation grooves surround a locking cavity in the middle, and the inner side wall of the deformation portion is integrally connected with a buckling protrusion, a plurality of buckling protrusions form a channel inner diameter, and the anti-sliding buckle 2 and the buckling protrusion in the embodiment are both made of unplasticized polyvinyl chloride material.

[0037] Further, in order to improve the connection stability of the anti-sliding buckle 2 and the protruding circular cone body 42, and prolong the effective service life of the anti-sliding buckle 2, the wing ring 5 is integrally connected with the outer side wall of the anti-sliding buckle 2, and the top wall of the wing ring 5 is coplanar with the top wall of the bottom mold 1.

[0038] Specifically, the steel bar truss 3 includes a top rod 31, a lower chord 32, and a connecting rod 33, the number of the lower chord 32 is two, the lower chord 32 is located below the top rod 31, and the axial directions of the top rod 31 and the lower chord 32 are parallel, the number of the connecting rod 33 is multiple, and the two ends of the connecting rod 33 are respectively welded and fixed with the top rod 31 and the lower chord 32, and the lower chord 32 passes through the slot; the top rod 31, the lower chord 32, and the multiple connecting rods 33 can be used as a steel lining of a concrete pouring structure, thereby improving the strength of the floor structure.

[0039] The implementation principle of the modular steel bar truss installation method is as follows: after the bottom die 1 is laid, the surveyor marks the center line of the floor axis and the anti-slip buckle 2 on the bottom die 1, according to the layout structure, the center point of the anti-slip buckle 2 is marked on the bottom die 1 by using a inkpot or a marker pen, and the hole position boundary is marked by using a cross line, then a template hole opener is used to open holes on the bottom die 1 according to the layout result, a suitable hole opening die is selected according to the size of the anti-slip buckle 2, the diameter of the hole opening is equal to the maximum outer diameter of the anti-slip buckle 2 (including the wing ring 5, wherein the width of the wing ring is 5mm), so the size of the hole opening is 30mm, the hole depth is controlled to be 10mm by using a drill depth limiter, after the hole opening is completed, the excess burrs are cleaned by using a sander, the wood chips in the hole are cleaned by using a dust collector, then the anti-slip buckle 2 is embedded in the hole of the bottom die 1, and the anti-slip buckle 2 and the bottom die 1 are permanently fixed by using self-tapping screws, and the tensile bearing capacity of the self-tapping screw connection point is not less than 2.5KN, ensure that when the bottom die 1 is removed, the anti-slip buckle 2 is integrally removed with the bottom die 1, and the purpose of multiple cycles is achieved. After the installation of the anti-slip buckle 2 is completed, the overall precision is checked to ensure that the longitudinal and transverse horizontal position deviation values of the anti-slip buckle 2 meet the requirements, and the installation height difference value meets the requirements. Then, according to the positioning line on the bottom die 1, the steel bar truss 3 is accurately placed in the specified position. To ensure that the structure meets the design and specification requirements, the center line of the steel bar truss 3 and the position of the lower chord 32 must coincide with the line marking. Then, the C-shaped groove 41 is inserted into the left and right ends of the lower chord 32 of the steel bar truss 3 by being inserted into the slot. The installation spacing of the adjacent two C-shaped grooves 41 is adjusted according to the stress requirements of different structures. After the C-shaped groove 41 is fixed with the steel bar truss 3, the protruding circular table body 42 below the C-shaped groove 41 is vertically pushed into the corresponding anti-slip buckle 2. At this time, the anti-slip buckle 2 has been permanently fixed with the bottom die 1. When pushing in, if a relatively obvious sound is heard when the anti-slip buckle 2 is tightened, it indicates that the protruding circular table body 42 and the anti-slip buckle 2 are tightly connected. After installation is completed, the size, position and quantity of the connecting structure and the steel bar truss 3 are detected using measuring tools to determine whether they are correct, whether the flatness and perpendicularity deviation is within the allowable range, and whether the variety, specification, model, quantity and spacing meet the design requirements. If all are qualified, the installation is completed. By connecting the protruding circular table body 42 and the anti-slip buckle 2 in a push-in socket manner, the need to remove the fastening bolt in advance when removing the bottom die 1 in the prior art is eliminated, which facilitates the quick installation and disassembly of the bottom die 1 and the steel bar truss 3 to improve construction efficiency. The size, material and other properties of the anti-slip buckle 2, the C-shaped groove 41 and the protruding circular table body 42 can be adjusted during the prefabrication process in the factory according to different application scenarios, structure types, building purposes, mechanical properties and process properties, covering all-scenario adaptive prefabrication, meeting multiple functional requirements, adapting to all working conditions, achieving organic unity of full-life-cycle compatibility and functional extensibility, and avoiding stress concentration at the edge of the buckle during concrete pouring through the wing ring flush design.

[0040] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made in structure, shape, principle, etc. according to the present application should be covered within the protection scope of the present application.

Claims

1. A modular steel truss installation method, characterized by: include: S1: Marking the center line and hole boundary of the anti-slip buckle (2) on the bottom mold (1); S2: using a template hole opener to open a hole on the bottom mold (1) that matches the anti-slip buckle (2); S3: The anti-slip buckle (2) is embedded and fixed in the hole of the bottom mold (1) by self-tapping screws; S4: Position and place the steel truss (3) according to the markings; S5: After the connector pair (4) is inserted into the lower chord (32) of the steel truss (3), the raised frustum in the connector pair (4) is pushed into the anti-slip buckle (2) to complete the socket connection; The anti-slip buckle (2) is an inverted hollow truncated cone and includes a wing ring (5) flush with the upper surface of the bottom mold (1); the connecting piece pair (4) includes a C-shaped groove (41) and a raised truncated cone (42) matching the anti-slip buckle (2).

2. The modular steel truss installation method according to claim 1, characterized in that: The size and material of the anti-slip buckle (2) and the connector pair (4) can be parameterized and adjusted based on the application scenario, structural type, and mechanical properties during factory prefabrication.

3. The modular steel truss installation method according to claim 2, characterized in that: The diameter of the upper end of the anti-slip buckle (2) is 20 mm, the diameter of the lower end is 15 mm, the wing ring (5) is 5 mm wide, 3 mm thick, and the overall height is 10 mm. The C-shaped groove (41) of the connector pair (4) is formed with a 10 mm insertion groove for fixing the lower chord (32), and 15 mm is reserved at the lower end of the insertion groove for controlling the thickness of the concrete protective layer.

4. The modular steel truss installation method according to claim 3, characterized in that: The anti-slip buckle (2) is made of unplasticized polyvinyl chloride material through integrated stamping and is connected to the bottom mold (1) through self-tapping screws. The tensile bearing capacity of the self-tapping screw connection point is ≥2.5kN.

5. The modular steel truss installation method according to any one of claims 1 to 4, characterized in that: The installation spacing parameters between two adjacent connector pairs (4) can be adjusted based on the structural stress requirements.

6. The modular steel truss installation method according to any one of claims 1 to 4, characterized in that: The longitudinal and lateral position deviations of the anti-slip buckle (2) are controlled to be ±3 mm, and the installation height deviation is ±1 mm. After the anti-slip buckle (2) is installed, it is measured and accepted using a measuring tool.

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