A support-free composite plate including a truss, a truss processing device and a method

Abstract

A support-free composite plate including a truss and a truss processing device, including a composite plate steel bar truss, the composite plate steel bar truss is in the shape of a quadrangular pyramid; the composite plate steel bar truss also includes a first bent steel bar, a second bent steel bar, and a connecting bar, and the first bent steel bar and the second bent steel bar are symmetrically arranged; and also includes a matching processing device for the composite plate steel bar truss. The composite plate steel bar truss, the bottom plate, the prestressed steel bar and other components constitute the support-free composite plate. The process method of the support-free composite plate mainly includes step one: making a steel bar truss; step two: making a truss support beam; step three: making a bottom plate; step four: connecting and assembling a steel bar truss and a truss support beam; step five: laying a steel bar truss and a truss support beam on the longitudinal and transverse steel bars; step six: pouring prestressed composite plate concrete; step seven: installing the prestressed composite plate; step eight: pouring the second layer of composite concrete; step nine: disassembling the truss support beam.

Description

Technical Field

[0001] The invention belongs to the technical field of construction, and relates to a building component, in particular to a prestressed support-free composite board and a method thereof. Background Art

[0002] Traditional composite slab components frequently used in the construction field can reduce wet work steps and construction formwork during the construction process, thereby improving construction efficiency. The shortcomings of traditional composite slabs are low overall stiffness, poor bending resistance, easy cracking, large amount of steel bars, and a large number of bottom supports. The traditional reinforced truss composite slab structure produces large deflection deformation during the hoisting process, and may even cause the base plate to crack. During the construction of the composite layer, a large number of supports must be set at the bottom of the slab to increase the overall vertical bearing capacity of the composite slab, reduce the deflection of the base plate, and avoid cracking of the base plate. Therefore, the construction of traditional composite slabs requires a lot of manpower and material resources, resulting in a high overall construction cost.

[0003] The existing traditional reinforced truss composite slab consists of a prefabricated reinforced truss and a reinforced concrete base plate. When the reinforced concrete base plate is poured, the lower chord of the reinforced truss composed of the upper chord, the web and the lower chord is embedded to form an integral load-bearing composite slab component. The reinforced truss in the composite slab provides vertical stiffness when pouring the cast-in-place concrete of the composite layer, which can improve the bearing capacity of the composite slab during the construction process. The web connects the upper and lower chords to form a spatially stable structure and improves the shear resistance of the interface between the new and old concrete. After the concrete is poured, the reinforced truss is completely embedded in the concrete, resulting in excessive redundancy in the configuration of the floor slab steel bars, resulting in "waste" of steel bars, and increasing the comprehensive manufacturing cost of the composite slab components. Summary of the invention

[0004] The object of the present invention is to provide a space truss and truss support beam assembly which can solve the deficiencies of the prior art.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a composite plate steel bar truss, comprising a composite plate steel bar truss, wherein the composite plate steel bar truss is in a quadrangular pyramid shape;

[0007] The composite plate steel bar truss also includes a first bent steel bar, a second bent steel bar, a connecting bar, and a nut, and the first bent steel bar and the second bent steel bar are symmetrically arranged;

[0008] Nuts are provided inside the ridge ends of the first bent steel bar and the second bent steel bar.

[0009] Preferably, there are connecting bars on the first bent steel bars and the second bent steel bars.

[0010] Preferably, the first bent steel bar further comprises an arc-shaped rib, the end of the arc-shaped rib extends downward to be provided with an oblique rib, and the oblique rib continues to extend to form a flat rib.

[0011] Preferably, the flat ribs are parallel to the horizontal plane.

[0012] Preferably, the first bent steel bar is formed by bending a steel bar.

[0013] Preferably, the distance between the flat bars of the first bent steel bar and the flat bars of the second bent steel bar is greater than the distance between the arcuate bars of the first bent steel bar and the arcuate bars of the second bent steel bar.

[0014] Preferably, the distance between the first bent steel bar arc rib and the second bent steel bar arc rib is the diameter of the nut.

[0015] Preferably, the arc-shaped ribs of the first bent steel bar and the arc-shaped ribs of the second bent steel bar are connected to the nuts by welding, and the arc-shaped ribs are inner arc welded and outer arc welded.

[0016] A processing device for composite plate steel bar truss, comprising

[0017] The precise processing device comprises a base plate, a four-sided pedestal, limiting steel bars and ear plates. The base plate is a flat plate, providing a steel truss welding operation platform. Two limiting steel bars are welded horizontally to both sides of the base plate for temporarily fixing the first bent steel bar and the second bent steel bar. A four-sided pedestal is arranged in the middle of the platform for providing an inclined surface when welding the first bent steel bar and the second bent steel bar. The upper part of the four-sided pedestal is a plane, and its function is to provide a plane for the nut to ensure the welding quality of the nut. At the same time, it can also ensure that the height of all steel trusses is consistent and the upper surface of the nut is horizontal.

[0018] Preferably, a center positioning line is provided at the top of the quadrangular pedestal.

[0019] A support-free composite plate also includes: the composite plate steel bar truss mentioned above, the composite plate steel bar truss has a bottom plate at the bottom, longitudinal and transverse bottom bars are arranged on the bottom plate, the bottom bars in the long side direction are prestressed bars, and the steel bar truss is tied and connected with the longitudinal and transverse bottom bars.

[0020] Preferably, the prestressed composite plate further comprises a truss support beam, the truss support beam is located on the upper part of the steel truss, the steel truss of the composite plate is connected to the upper truss support beam by an extension bolt, and the other end of the extension bolt is connected to a nut.

[0021] The periphery of the lengthened bolt is sleeved with a sleeve.

[0022] As described, the truss support beam has holes at positions corresponding to the lengthened bolts;

[0023] Preferably, the sleeve is a circular steel pipe, which serves to lift the truss support beam and facilitate the surface treatment of the concrete after pouring the upper concrete of the composite plate. After pouring the concrete, the upper surface height of the concrete is slightly lower than the upper surface height of the nut.

[0024] Preferably, the lengthened bolt is an ordinary bolt, and the truss support beam, sleeve, and steel truss are connected as a whole through an electric wrench. After the lengthened bolt is screwed into the nut, the exposed length is at most 1-2 threads, ensuring that the lengthened bolt can be removed after the concrete reaches the required strength, and the lengthened bolt, sleeve, and truss support beam can be recycled.

[0025] A construction method for a support-free composite slab comprises the following steps:

[0026] Step 1: Fabrication of steel trusses

[0027] A: According to the construction requirements, cut the steel bars with a diameter of 6-10mm;

[0028] B: Bend the cut steel bars;

[0029] The angle between the flat reinforcement and the oblique reinforcement of the first bent steel bar is between 110 and 145 degrees, and the curvature of the oblique reinforcement on both sides is 45 to 60 degrees.

[0030] C: The first bent steel bar and the second bent steel bar are placed symmetrically through the truss processing device, and nuts are placed at the end of the truss processing device. The nuts are welded to the ridges of the first bent steel bar and the second bent steel bar, and the connecting bars are welded at a position one-third of the distance from the top of the steel bar truss to fix the steel bar truss.

[0031] Step 2: Make the truss support beam

[0032] A: The truss support beam is made of full-length rectangular steel pipe, and holes are opened in the rectangular steel pipe at the corresponding positions of the lengthened bolts;

[0033] Step 3: Make the base

[0034] A: The production of the base plate is completed on the mold table. Before production, the templates are installed on the four sides of the base plate to control the size of the composite plate;

[0035] B: After installing multiple bottom plate formworks, lay the short side reinforcement, then lay the long side full-length reinforcement, use tensioning equipment to tension the full-length reinforcement, and tie and connect the longitudinal and transverse reinforcement.

[0036] Step 4: Connection and combination of steel trusses and truss support beams.

[0037] A: Assemble the truss support beam and the steel truss according to the needs;

[0038] B: Use extended bolts to connect the steel truss and the truss support beam. After the extended bolts are screwed into the nuts, 1-2 thread lengths are exposed. A sleeve is set between the steel truss and the truss support beam, and the bolt connection should be firm.

[0039] Step 5: Lay steel trusses and truss support beams on the longitudinal and transverse steel bars

[0040] A: Place the steel truss and truss support beam assembly at the corresponding position as required, and connect the steel truss with the longitudinal and transverse steel bars by binding;

[0041] Step 6: Prestressed composite slab concrete pouring

[0042] A: After the shear steel support bracket and truss support beam are placed, concrete is poured with a thickness of 3.5-5cm. After the concrete pouring is completed, the upper surface is roughened.

[0043] B: After pouring concrete, the composite slab is cured. After reaching a certain strength, the prestressed steel bars are cut off and the formwork is removed. After reaching the lifting strength, the truss support beams are removed and the composite slab is transported to the yard or construction site. The truss support beams used in this step are only used to fix the position and elevation of the steel truss in the production of the composite slab, and do not bear the load during the construction process. They are different in specifications and functions from the truss support beams used for on-site lifting and pouring of concrete composite layers.

[0044] Step 7: Prestressed composite slab installation

[0045] A: Before installing the prestressed composite slab, install the truss support beam to the composite slab and fix it. Then, hoist the composite slab to the corresponding position according to the position requirements of the drawing. Place the two ends of the composite slab on the structural beams on both sides.

[0046] B: After the composite slab is hoisted, tie the upper reinforcement of the composite slab;

[0047] Step 8: Pour the second layer of laminated concrete

[0048] After tying the upper steel bars, pour the second layer of composite concrete on the upper part. The concrete pouring height is slightly lower than the nut height.

[0049] Step 9: Remove the truss support beams

[0050] After pouring the upper concrete, the concrete surface is polished. When the concrete reaches a certain strength, the truss support beam is removed. When removing the truss support beam, the extension bolts are removed by an electric wrench, and then the removed extension bolts, sleeves, and truss support beams are collected for subsequent use of the composite slab.

[0051] The advantages of the present invention are: it can be processed in a streamlined manner on a production line, the bending strength of the composite plate components is improved, the rigidity is large, and it is not easy to produce excessive deflection and deformation; the amount of steel trusses used is small, saving a lot of steel; no bottom support frame needs to be set up during on-site construction, and the construction is convenient; the truss support beam can be removed after the concrete is poured and can be recycled. The above characteristics can reduce the processing and construction costs of the composite plate, and help promote the rapid and efficient development of the prefabricated industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Attached Figure 1 It is a structural schematic diagram of the composite plate steel bar truss of the present invention;

[0053] Attached Figure 2 It is a structural schematic diagram of the truss processing device of the present invention;

[0054] Attached Figure 3 It is a structural schematic diagram of the truss production of the present invention.

[0055] Attached Figure 4 It is a schematic diagram of the first bent steel bar of the present invention.

[0056] Figure 1-Figure 4 middle

[0057] 1 is the first bending steel bar

[0058] 2 is the second bent steel bar

[0059] 3 is the connecting rib

[0060] 4 for nuts

[0061] 5 is flat tendon

[0062] 6 is the oblique reinforcement

[0063] 7 is an arc rib.

[0064] 8 is the bottom plate

[0065] 9 is the limit steel bar

[0066] 10 for ear plate

[0067] 11 is a four-sided pedestal

[0068] 12 is the positioning center line.

[0069] 13 is a steel truss

[0070] 14 is a steel bar truss processing device.

[0071] Attached Figure 5 It is a schematic diagram of the structure of a complete laminated plate formed by combining the above components of the present invention.

[0072] Attached Figure 6It is a top view of the composite plate of the present invention.

[0073] Attached Figure 7 It is a plan view of the composite board of the present invention.

[0074] Attached Figure 8 It is a partial enlarged view of the present invention.

[0075] in Figures 5 to 8 middle:

[0076] 15 is a bottom plate, 16 is a prestressed steel bar, 17 is a steel bar truss, 18 is a truss support beam, 19 is a sleeve, and 20 is an extension bolt. DETAILED DESCRIPTION

[0077] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0078] See also Figures 1 to 8 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0079] The present invention provides a composite plate steel bar truss, comprising a composite plate steel bar truss, wherein the composite plate steel bar truss is in a quadrangular pyramid shape;

[0080] The composite plate steel bar truss also includes a first bent steel bar, a second bent steel bar, and a connecting bar, and the first bent steel bar and the second bent steel bar are symmetrically arranged;

[0081] Nuts are provided inside the ridge ends of the first bent steel bar and the second bent steel bar.

[0082] Preferably, there are connecting bars on the first bent steel bars and the second bent steel bars.

[0083] Preferably, the first bent steel bar further comprises an arc-shaped rib, the end of the arc-shaped rib extends downward to be provided with an oblique rib, and the oblique rib continues to extend to form a flat rib.

[0084] Preferably, the flat ribs are parallel to the horizontal plane.

[0085] Preferably, the first bent steel bar is formed by bending a steel bar.

[0086] Preferably, the distance between the flat bars of the first bent steel bar and the flat bars of the second bent steel bar is greater than the distance between the arcuate bars of the first bent steel bar and the arcuate bars of the second bent steel bar.

[0087] Preferably, the distance between the first bent steel bar arc rib and the second bent steel bar arc rib is the diameter of the nut.

[0088] Preferably, the arc-shaped ribs of the first bent steel bar and the arc-shaped ribs of the second bent steel bar are connected to the nuts by welding, and the arc-shaped ribs are inner arc welded and outer arc welded.

[0089] A processing device for composite plate steel bar truss, comprising

[0090] The precise processing device comprises a base plate, a four-sided pedestal, limiting steel bars and ear plates. The base plate is a flat plate, providing a steel truss welding operation platform. Two limiting steel bars are welded horizontally to both sides of the base plate for temporarily fixing the first bent steel bar and the second bent steel bar. A four-sided pedestal is arranged in the middle of the platform for providing an inclined surface when welding the first bent steel bar and the second bent steel bar. The upper part of the four-sided pedestal is a plane, and its function is to provide a plane for the nut to ensure the welding quality of the nut. At the same time, it can also ensure that the height of all steel trusses is consistent and the upper surface of the nut is horizontal.

[0091] Preferably, a center positioning line is provided at the top of the quadrangular pedestal.

[0092] A support-free composite plate also includes: the composite plate steel bar truss mentioned above, the composite plate steel bar truss has a bottom plate at the bottom, longitudinal and transverse bottom bars are arranged on the bottom plate, the bottom bars in the long side direction are prestressed bars, and the steel bar truss is tied and connected with the longitudinal and transverse bottom bars.

[0093] Preferably, the prestressed composite plate further comprises a truss support beam, the truss support beam is located on the upper part of the steel truss, the steel truss of the composite plate is connected to the upper truss support beam by an extension bolt, and the other end of the extension bolt is connected to a nut.

[0094] The periphery of the lengthened bolt is sleeved with a sleeve.

[0095] As described, the truss support beam has holes at positions corresponding to the lengthened bolts;

[0096] Preferably, the sleeve is a circular steel pipe, which serves to lift the truss support beam and facilitate the surface treatment of the concrete after pouring the upper concrete of the composite plate. After pouring the concrete, the upper surface height of the concrete is slightly lower than the upper surface height of the nut.

[0097] Preferably, the lengthened bolt is an ordinary bolt, and the truss support beam, sleeve and steel truss are connected as a whole through an electric wrench. After the lengthened bolt is screwed into the nut, the exposed length is at most 2 threads, ensuring that the lengthened bolt can be removed after the concrete reaches the required strength, and the lengthened bolt, sleeve and truss support beam can be recycled.

[0098] A construction method for a support-free composite slab comprises the following steps:

[0099] Step 1: Fabrication of steel trusses

[0100] A: According to the construction requirements, cut the steel bars with a diameter of 8mm;

[0101] B: Bend the cut steel bars;

[0102] The angle between the flat reinforcement and the oblique reinforcement of the first bent steel bar is between 120 degrees, and the curvature of the oblique reinforcement on both sides is 45 degrees.

[0103] C: The first bent steel bar and the second bent steel bar are placed symmetrically through the truss processing device, and nuts are placed at the end of the truss processing device. The nuts are welded to the ridges of the first bent steel bar and the second bent steel bar, and the connecting bars are welded at a position one-third of the distance from the top of the steel bar truss to fix the steel bar truss.

[0104] Step 2: Make the truss support beam

[0105] A: The truss support beam is made of full-length rectangular steel pipe, and holes are opened in the rectangular steel pipe at the corresponding positions of the lengthened bolts;

[0106] Step 3: Make the base

[0107] A: The production of the base plate is completed on the mold table. Before production, the templates are installed on the four sides of the base plate to control the size of the composite plate;

[0108] B: After installing multiple bottom plate formworks, lay the short side reinforcement, then lay the long side full-length reinforcement, use tensioning equipment to tension the full-length reinforcement, and tie and connect the longitudinal and transverse reinforcement.

[0109] Step 4: Connection and combination of steel trusses and truss support beams.

[0110] A: Assemble the truss support beam and the steel truss according to the needs;

[0111] B: Use extended bolts to connect the steel truss and the truss support beam. After the extended bolts are screwed into the nuts, 2 thread lengths are exposed. A sleeve is set between the steel truss and the truss support beam, and the bolt connection should be firm.

[0112] Step 5: Lay steel trusses and truss support beams on the longitudinal and transverse steel bars

[0113] A: Place the steel truss and truss support beam assembly at the corresponding position as required, and connect the steel truss with the longitudinal and transverse steel bars by binding;

[0114] Step 6: Prestressed composite slab concrete pouring

[0115] A: After the shear steel support bracket and truss support beam are placed, concrete is poured with a thickness of 4cm. After the concrete pouring is completed, the upper surface is roughened.

[0116] B: After pouring concrete, the composite slab is cured. After reaching a certain strength, the prestressed steel bars are cut off and the formwork is removed. After reaching the lifting strength, the truss support beams are removed and the composite slab is transported to the yard or construction site. The truss support beams used in this step are only used to fix the position and elevation of the steel truss in the production of the composite slab, and do not bear the load during the construction process. They are different in specifications and functions from the truss support beams used for on-site lifting and pouring of concrete composite layers.

[0117] Step 7: Prestressed composite slab installation

[0118] A: Before installing the prestressed composite slab, install the truss support beam to the composite slab and fix it. Then, hoist the composite slab to the corresponding position according to the position requirements of the drawing. Place the two ends of the composite slab on the structural beams on both sides.

[0119] B: After the composite slab is hoisted, tie the upper reinforcement of the composite slab;

[0120] Step 8: Pour the second layer of laminated concrete

[0121] After tying the upper steel bars, pour the second layer of composite concrete on the upper part. The concrete pouring height is slightly lower than the nut height.

[0122] Step 9: Remove the truss support beams

[0123] After pouring the upper concrete, the concrete surface is polished. When the concrete reaches a certain strength, the truss support beam is removed. When removing the truss support beam, the extension bolts are removed by an electric wrench, and then the removed extension bolts, sleeves, and truss support beams are collected for subsequent use of the composite slab.

[0124] The structure of the truss is not limited to rectangular steel pipes, and circular steel pipes may also be used. The material is not limited, and I-beams and channel steels may also be used. The structure of the connector is not limited to pins and threaded connections.

[0125] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A construction method for a support-free composite slab, characterized in that: The following steps are involved: Step 1: Fabrication of steel trusses A: According to the construction requirements, cut the steel bars with a diameter of 6-10mm; B: Bend the cut steel bars; The angle between the flat and oblique bars of the first bent steel bar is between 110 and 145 degrees, and the arc of the oblique bars on both sides is 45 to 60 degrees; C: The first bent steel bar and the second bent steel bar are placed symmetrically by a truss processing device, and nuts are placed at the end of the truss processing device. The nuts are welded to the ridges of the first bent steel bar and the second bent steel bar, and the connecting bars are welded at a position one-third of the distance from the top of the steel bar truss to fix the steel bar truss; Step 2: Make the truss support beam A: The truss support beam is made of full-length steel pipe, and holes are opened on the steel pipe at the corresponding positions of the lengthened bolts; Step 3: Make the base A: The production of the base plate is completed on the mold table. Before production, the templates are installed on the four sides of the base plate to control the size of the composite plate; B: After installing multiple bottom plate templates, lay the short side steel bars, then lay the long side full-length steel bars, and use tensioning equipment to tension the full-length steel bars, and tie and link the longitudinal and transverse steel bars; Step 4: Connection and combination of steel trusses and truss support beams A: Assemble the truss support beam and the steel truss according to the needs; B: Connect the steel truss and the truss support beam by lengthening the bolts. After the lengthening bolts are screwed into the nuts, 1-2 thread lengths are exposed. A sleeve is set between the steel truss and the truss support beam. The bolt connection should be firm. Step 5: Lay steel trusses and truss support beams on the longitudinal and transverse steel bars A: Place the steel truss and truss support beam assembly at the corresponding position as required, and connect the steel truss with the longitudinal and transverse steel bars by binding; Step 6: Prestressed composite slab concrete pouring A: After the shear steel support and truss support beam are placed, concrete is poured with a thickness of 3.5-5cm. After the concrete pouring is completed, the upper surface is roughened; B: After pouring concrete, the composite slab is cured. After reaching a certain strength, the prestressed steel bars are cut off and the formwork is removed. After reaching the lifting strength, the truss support beams are removed and the composite slab is transported to the yard or construction site; The truss support beams used in this step are only used to fix the position and elevation of the steel trusses in the production of the composite slabs, and do not bear the load during the construction process. They are different in specifications and functions from the truss support beams used for on-site hoisting and pouring of concrete composite layers. Step 7: Prestressed composite slab installation A: Before installing the prestressed composite slab, install the truss support beam to the composite slab and fix it, then hoist the composite slab to the corresponding position according to the position requirements of the drawing, and place the two ends of the composite slab on the structural beams on both sides; B: After the composite slab is hoisted, tie the upper reinforcement of the composite slab; Step 8: Pour the second layer of laminated concrete After tying the upper reinforcement, pour the second layer of upper composite concrete. The concrete pouring height is slightly lower than the nut height. Step 9: Remove the truss support beams After pouring the upper concrete, the concrete surface is polished. When the concrete reaches a certain strength, the truss support beam is removed. When removing the truss support beam, the extension bolts are removed by an electric wrench, and then the removed extension bolts, sleeves, and truss support beams are collected for subsequent use of the composite slab.

Images