Disassembly-free self-insulation truss floor support plate and construction method

Abstract

The invention provides a disassembly-free self-heat-preservation truss floor support plate and a construction method. The disassembly-free self-heat-preservation truss floor support plate comprises a plurality of truss sets, a connecting bottom plate and a heat preservation and insulation layer. A plurality of bottom holes are formed in the connecting bottom plate, the welding surface layer and the heat preservation and insulation layer are fixed to the bottom of the connecting bottom plate, anchor points protruding upwards are arranged in the heat preservation and insulation layer, a plurality of welding points are arranged between the bottom of the truss set and the welding surface layer, and the anchor points are welded to the bottom holes of the connecting bottom plate; the connecting bottom plate and the heat preservation and insulation layer are integrally pressed and formed plates, the heat preservation layer and the floor support plate bottom plate are fixedly connected in an embedded and lap joint mode, the strength of the disassembly-free bottom die steel bar truss floor support plate can be improved, the strength of the bottom plate part can be enhanced while the heat preservation layer is arranged, and when the super-large-span lap joint requirement is met, the floor support plate can be conveniently disassembled and assembled. The steel bar truss floor support plate has better material deflection resistance, and the use scene of the dismounting-free bottom die steel bar truss floor support plate is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of floor pouring construction, in particular to a disassembly-free self-insulating truss floor deck and a construction method. Background Art

[0002] The non-disassembly bottom formwork steel truss floor deck is a new type of prefabricated floor component with the advantages of light hoisting weight and easy installation. When dealing with the construction of large-span floor positions, the non-disassembly bottom type floor deck structure can achieve rapid lap joints and does not require zero temporary support, thereby saving the more cumbersome formwork and demoulding process. However, in the actual construction process, the modular building technology has put forward higher requirements on the maximum applicable span of the unsupported construction of the floor deck. This has very high requirements on the support of the bottom of the non-disassembly bottom formwork steel truss floor deck and the deflection of the bottom material of the deck itself. The use of a thickened bottom plate will seriously increase the cost investment and has certain defects. In order to achieve the above purpose, the present invention provides a non-disassembly self-insulating truss floor deck and a construction method, which can solve the problems raised in the above background technology. Summary of the Invention

[0003] The present invention adopts the following technical solutions to achieve: A self-insulating truss floor deck that does not require disassembly comprises a plurality of truss groups, a connecting base plate, and a thermal insulation layer; the connecting base plate comprises a plurality of bottom holes and a welding surface layer; the thermal insulation layer is fixed to the bottom of the connecting base plate; an upwardly protruding anchor point is provided inside the thermal insulation layer; a plurality of welding points are provided between the bottom of the truss group and the welding surface layer; the anchor points are welded to the bottom holes of the connecting base plate; The connecting bottom plate and the thermal insulation layer are integrally pressed and formed.

[0004] Preferably, there is an adjustment gap between two adjacent floor decking plates, and a stopper tape is provided on the surface of the bottom of the adjustment gap of the floor decking plate that contacts the steel beam or the sleeper, and a mesh cement board is provided on the bottom of the thermal insulation layer.

[0005] Preferably, the same bottom reinforcement is fixed between the two truss groups on the side close to each other of the two adjacent floor decking plates.

[0006] A method for constructing a self-insulating truss floor deck without disassembly, comprising the following steps: S1. Bottom plate overlap: After the insulation layer is stirred and mixed during the process of making the mixture, the connecting bottom plate is attached to the upper surface of the connecting bottom plate and the anchor point is extended out of the bottom hole to wait for consolidation. After consolidation, the truss group, the connecting bottom plate, and the anchor point are welded and fixed in sequence; S2. Hoisting: Before hoisting, the construction phase verification should be carried out. The stacking height of the panels should be less than 1.2m, and the horizontal angle of the hoisting belt should not be less than 60° and should not be less than 45°. S3. Rebar and pipe hole layout: Arrange the floor support connecting steel bars, additional steel bars, and distribution steel bars according to the design requirements, and tie and connect them with the truss group; install mesh cement slabs and lay grout-stopping tape on the beam body, and lay pipelines along the ends of the steel beams; S4. Side formwork installation and plate seam treatment: After each steel frame floor slab is laid and adjusted into place, ensure that the bottom formwork, steel frame, walls, columns, and beams are firmly connected; S5. Concrete pouring: Scaffolding is laid in the reserved road position, and concrete is poured obliquely towards the floor deck; S6. Dismantling: After the concrete layer solidifies, the supporting part is released and the remaining mesh concrete layer at the bottom can be cut, separated and dismantled.

[0007] Preferably, in step S1, a steel plate layer may be fixed to the inner bottom of the thermal insulation layer by embedding a keel; the steel plate layer acts as an outer membrane, and the anchor point may be determined by the position of the keel.

[0008] Preferably, in step S2, the load effect design value obtained by verification is calculated according to the following formula: S=1.3Ss+1.5Sc+1.5Sq Where: S--load effect design value; Ss - standard value of load effect generated by copper reinforced truss floor deck and steel bar self-weight in the calculation section; SC - standard value of load effect caused by concrete deadweight on the calculation section; Sq--Standard value of load effect caused by variable load on the calculation section during the construction phase.

[0009] Preferably, the position and number of lifting points should be determined by calculation; when lifting a single non-disassembly truss floor deck, the steel truss nodes can also serve as lifting points.

[0010] Preferably, in step S3, reinforcement bars and side formwork should be provided at the reserved pipe holes of the steel frame floor slab, and the non-removable bottom formwork and the steel bars at the opening can be cut only after the floor slab concrete reaches the design strength; when the steel frame is cut before concrete pouring, temporary supports should be provided under the cut steel bridge frames on both sides of the opening.

[0011] Preferably, in step S4, the support length of the non-disassembly truss floor deck in the length direction (referring to the distance between the edge of the upper flange of the steel beam and the end vertical support steel bar) should not be less than 5 times the diameter of the lower chord steel bar and should not be less than 50 mm.

[0012] Preferably, before the concrete strength reaches 100% of the design strength grade value, the load on the slab shall not exceed the sum of the design value of the permanent load and the standard value of the variable load during the construction phase.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention integrates the thermal insulation material and the plate material into an integrated process, which can make the disassembly-free self-insulating truss floor have better thermal insulation properties than ordinary steel bottom plates. At the same time, during the casting process, the hardness of the bottom steel plate can be better improved, thereby achieving better deflection. When pouring cement, it can withstand greater impact forces and the weight of thicker concrete layers, thereby improving the strength support effect of the original truss support plate on the floor structure. Secondly, by providing the thermal insulation material layer, the originally bare bottom steel plate can be made aesthetically pleasing, which can ensure a certain degree of external integrity of the building material. The changes in the method enable the integral non-disassembly self-insulating truss floor to be quickly hoisted and assembled, and multiple hanging plates can be quickly spliced ​​and the gaps located, so that the bottom of the non-disassembly self-insulating truss floor can be conveniently and quickly filled with the overall surface concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the self-insulating truss floor decking plate that does not require disassembly; In the figure: 1. Truss group; 2. Connecting base plate; 3. Thermal insulation layer; 5. Stop grout tape; 104. Bottom reinforcement. DETAILED DESCRIPTION

[0015] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0016] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly used by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Please refer to the attached Figure 1 A self-insulating truss floor deck that does not require disassembly comprises a plurality of truss groups 1, a connecting base plate 2, and a thermal insulation layer 3; the connecting base plate 2 comprises a plurality of bottom holes and a welding surface layer, the thermal insulation layer 3 is fixed to the bottom of the connecting base plate 2, an upwardly protruding anchor point is provided inside the thermal insulation layer 3, a plurality of welding points are provided between the bottom of the truss group 1 and the welding surface layer, and the anchor points are welded to the bottom holes of the connecting base plate 2; The connecting bottom plate 2 and the thermal insulation layer 3 are integrally pressed and formed.

[0020] Please refer to Figure 1 There is an adjustment gap between two adjacent floor decking plates, and a stop-slurry tape 5 is provided on the surface of the bottom of the adjustment gap of the floor decking plate that contacts the steel beam or the sleeper. A mesh cement board is provided at the bottom of the thermal insulation layer 3, and the same bottom reinforcement 104 is fixed between the two groups of trusses 1 on the side close to the two adjacent floor decking plates.

[0021] A method for constructing a self-insulating truss floor deck without disassembly, comprising the following steps: S1. Bottom plate overlap: After the insulation layer 3 is stirred and mixed during the preparation of the mixed material, the connecting bottom plate 2 is attached to the upper surface of the connecting bottom plate 2 and the anchor point is extended out of the bottom hole to wait for consolidation. After consolidation, the truss group 1, the connecting bottom plate 2, and the anchor point are welded and fixed in sequence; S2. Hoisting: Before hoisting, the construction phase verification should be carried out. The stacking height of the panels should be less than 1.2m, and the horizontal angle of the hoisting belt should not be less than 60° and should not be less than 45°. S3. Layout of steel bars and pipe holes: Arrange the floor support connecting steel bars, additional steel bars, and distribution steel bars according to the design requirements, and tie and connect them to the truss group 1; install mesh cement slabs and apply stop grout tape 5 to the beam body, and lay the pipeline along the end of the steel beam; S4. Side formwork installation and plate seam treatment: After each steel truss floor deck is laid and adjusted into place, ensure that the bottom formwork, steel truss, walls, columns, and beams are firmly connected; S5. Concrete pouring: Scaffolding is laid in the reserved road position, and concrete is poured obliquely towards the floor deck; S6. Dismantling: After the concrete layer solidifies, the supporting part is released and the remaining mesh concrete layer at the bottom can be cut, separated and dismantled.

[0022] In step S1, a steel plate layer may be fixed to the bottom of the inner portion of the thermal insulation layer 3 by embedding a keel; the steel plate layer acts as an outer membrane, and the anchor point may be determined by the position of the keel.

[0023] Please pay attention to Figure 1 In step S2, the load effect design value obtained by verification is calculated according to the following formula: S=1.3Ss+1.5Sc+1.5Sq Where: S--load effect design value; Ss - standard value of load effect generated by copper reinforced truss floor deck and steel bar self-weight in the calculation section; SC - standard value of load effect caused by concrete deadweight on the calculation section; Sq - the standard value of the load effect generated by the variable load on the calculation section during the construction phase; Among them, 1. When no temporary support is set within the span, the deflection of the floor deck should be calculated according to the standard combination of permanent load and variable load. The deflection limit should not be greater than the deflection of the floor deck calculated by the quasi-combination of the floor deck calculation span. The deflection limit should not be greater than the smaller value of 1 / 180 of the floor deck calculation span and 20mm; 2. When temporary supports are set within the span, the deflection of the floor decking should be calculated according to the standard value of permanent load. When the bottom surface of the copper reinforced truss concrete slab is exposed, the deflection limit should be 1 / 400 of the support span; when the bottom surface of the reinforced truss concrete slab is concealed, the deflection limit should be 1 / 250 of the support span; the support span should be based on the spacing between adjacent temporary supports or the distance between the temporary support and the end support of the floor decking.

[0024] The location and number of lifting points should be determined through calculation. When lifting a single non-detachable truss floor deck, the steel truss nodes can also serve as lifting points. The transportation of the trusses should be carried out in accordance with the following regulations: it is recommended to use a dedicated transport vehicle for transportation. When using a non-dedicated transport vehicle, appropriate reinforcement and protection measures should be taken. The non-detachable truss floor deck should be laid flat and securely tied to the dedicated transport frame with a clamp. The corners and the contact areas of the tying should be protected with flexible padding materials. Flexible materials should be placed between the dedicated transport frame, the carriage plate, and the non-detachable truss floor deck. The stacking site of copper reinforced truss floor slabs should be flat and solid, and should have drainage measures. They should be placed flat, and the steel trusses should be upwards and not upside down.

[0025] In step S3, reinforcement bars and side formwork should be installed at the reserved pipe holes of the steel truss floor deck. The non-removable bottom formwork and the steel bars at the opening can be cut only after the floor slab concrete reaches the design strength. When cutting the steel truss before pouring concrete, temporary supports should be installed under the cut steel bridges on both sides of the opening. Among them, the steel truss floor deck must be installed before this. The steel beams, concrete beams, beam-wall formwork and supporting components must be inspected and accepted before the steel truss floor deck can be installed. Before laying the steel frame floor deck, any debris on the top of the beam or inside the beam formwork should be cleared. The steel truss floor deck should be laid layer by layer from bottom to top in the order of floors. Mechanical cutting or gas cutting can be used for cutting corners or places where the plane shape changes, and technical measures should be taken to reinforce the cut areas. The support steel bars of the steel bridge floor deck should be installed on reliable supports, and temporary supports should be installed at the node position below the bridge web. The steel trusses should be firmly connected to the wall, column, and beam reinforcement at the supports at both ends; the gaps between the steel bridge deck formwork and the wall or beam should be sealed with edge strips or foam glue; the variable load during construction should not exceed 1.5kN / m2, and excessive concentrated loads should be avoided. When unavoidable, strengthened support measures should be taken. After the steel truss deck is laid over a certain area, additional steel bars should be tied in time. In addition, when supports are set according to design requirements, temporary measures should be taken to effectively prevent overturning or simulated sliding. The layout of the steel pipe openings is as follows: the floor support connecting steel bars, additional steel bars and distribution steel bars are arranged according to the design requirements, and tied and connected with the steel trusses; Reinforced steel bars and side formwork should be installed at the reserved pipe holes of the steel truss floor slab. The non-removable bottom formwork and the steel bars at the opening can only be cut after the floor slab concrete reaches the design strength. When cutting the steel trusses before pouring concrete, temporary supports should be installed under the cut steel trusses on both sides of the opening. When the hole has a large concentrated load or the edge is greater than 900mm, the hole side beam should be installed according to the design requirements. When laying pipelines in the plate, rigid pipelines can be used when passing through vertically, and flexible materials should be used when passing through obliquely. Pipes with smaller diameters should be used as much as possible. Pre-embedded holes should be dispersed to avoid multiple pipelines crossing or clustered holes on the plate. The embedded box body should be securely fixed on the bottom mold. If the bottom mold cannot be removed, a circle with a diameter not greater than 30mm can be opened at the box body position on the bottom mold. Floor decking should be cut using mechanical, cold working, air plasma and other methods. Cutting with oxygen-acetylene flame is strictly prohibited.

[0026] In step S4, the support length of the non-removable truss floor deck in the longitudinal direction (referring to the distance between the edge of the upper flange of the steel beam and the end vertical support steel bar) shall not be less than 5 times the diameter of the lower chord steel bar, and shall not be less than 50mm; when laying the steel truss floor deck at the steel column, the supporting angle steel shall be pre-welded on the steel column, the bottom plate of the part colliding with the steel column shall be cut off, and the upper and lower chord steel bars shall be welded together; In concrete structures, the following measures should be taken to ensure that the bottom formwork, steel trusses and walls, columns, beams and steel bars are firmly connected to the formwork 1) The force transmission at the end of the steel truss should be reliable. The bottom formwork of the steel truss floor deck should be effectively overlapped on the beam side formwork and should not exceed the inner side formwork of the frame formwork and the top surface of the wall, column and beam formwork. It should be fixed every 300mm. 2) The support length on the warm concrete beam with embedded parts should not be less than 75mm, and effective measures should be taken to ensure that there is no leakage when pouring concrete.

[0027] Before the concrete strength reaches 100% of the design strength grade, the load on the slab shall not exceed the sum of the design value of the permanent load and the standard value of the variable load during the construction phase; Concrete pouring of reinforced truss floor slabs shall comply with the following provisions: Before pouring, the installation of steel truss floor deck and slab reinforcement binding should be completed and accepted; The wire boxes, sleeves, and embedded parts for hanging items on the steel truss floor deck should be securely fixed to the bottom formwork or steel bars before pouring concrete; Before pouring concrete on the steel truss floor deck, the bottom formwork should be cleared of debris, dust, grease, etc. Scaffolding should be laid in areas where people and vehicles move frequently; The materials should be evenly distributed before pouring; during pouring and vibration, a dedicated person should observe and maintain the bottom formwork and temporary support, and any abnormal situation should be handled promptly; When pouring concrete, do not impact the steel truss floor deck. When pouring concrete, spread it out quickly to avoid excessive accumulation. The pumped concrete pipe support should be supported on the beam or wall. When using pumped concrete pouring, measures should be taken to prevent the pumping equipment from being overweight or having excessive impact force that may affect the safety of the reinforced truss floor deck and temporary supports.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The above content is only an example and explanation of the structure of the present invention. Technicians in this technical field can make various modifications or supplements to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A self-insulating truss floor deck that does not require disassembly, characterized by: The invention comprises a plurality of truss groups (1), a connecting base plate (2), and a thermal insulation layer (3); the connecting base plate (2) comprises a plurality of bottom holes and a welding surface layer; the thermal insulation layer (3) is fixed to the bottom of the connecting base plate (2); an upwardly protruding anchor point is provided inside the thermal insulation layer (3); a plurality of welding points are provided between the bottom of the truss group (1) and the welding surface layer; the anchor points and the bottom holes of the connecting base plate (2) are welded to each other; The connecting bottom plate (2) and the thermal insulation layer (3) are integrally pressed and formed plates.

2. The self-insulating truss floor decking plate according to claim 1 is characterized in that: An adjustment gap is provided between two adjacent floor decking plates, and a stopper tape (5) is provided on the surface of the adjustment gap bottom of the floor decking plate that contacts the steel beam or the sleeper, and a mesh cement board is provided on the bottom of the thermal insulation layer (3).

3. The self-insulating truss floor decking plate according to claim 2 is characterized in that: A common bottom reinforcement (104) is fixed between two truss groups (1) on the side close to two adjacent floor decking plates.

4. A construction method for a non-disassembly self-insulating truss floor deck, according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Base plate overlap: after the thermal insulation layer (3) is stirred and mixed during the process of making the mixed material thermal insulation layer (3), the connecting base plate (2) is attached to the upper surface of the connecting base plate (2) and the anchor point is extended out of the bottom hole to wait for consolidation. After consolidation, the truss group (1), the connecting base plate (2) and the anchor point are welded and fixed in sequence; S2. Hoisting: Before hoisting, the construction phase verification should be carried out. The stacking height of the panels should be less than 1.2m, and the horizontal angle of the hoisting belt should not be less than 60° and should not be less than 45°. S3. Layout of steel bars and pipe holes: Arrange the floor support connecting steel bars, additional steel bars and distribution steel bars according to the design requirements, and tie and connect them with the truss group (1); set up the mesh cement board and lay the mortar-stopping tape (5) on the beam body, and lay the pipeline along the end of the steel beam; S4. Side formwork installation and plate seam treatment: After each steel frame floor slab is laid and adjusted into place, ensure that the bottom formwork, steel frame, walls, columns, and beams are firmly connected; S5. Concrete pouring: Scaffolding is laid in the reserved road position, and concrete is poured obliquely towards the floor deck; S6. Dismantling: After the concrete layer solidifies, the supporting part is released and the remaining mesh concrete layer at the bottom can be cut, separated and dismantled.

5. The method for constructing a self-insulating truss floor deck without disassembly according to claim 4, characterized in that: In step S1, a steel plate layer is fixed to the inner bottom of the thermal insulation layer (3) by embedding a keel; the steel plate layer acts as an outer membrane, and the anchor point can be determined by the position of the keel.

6. The method for constructing a self-insulating truss floor deck without disassembly according to claim 4, characterized in that: In step S2, the load effect design value obtained by verification is calculated according to the following formula: S=1.3Ss+1.5Sc+1.5Sq Where: S--load effect design value; Ss - standard value of load effect generated by copper reinforced truss floor deck and steel bar self-weight in the calculation section; SC - standard value of load effect caused by concrete deadweight on the calculation section; Sq--Standard value of load effect caused by variable load on the calculation section during the construction phase.

7. The method for constructing a self-insulating truss floor deck without disassembly according to claim 6, characterized in that: The location and number of lifting points should be determined through calculation; when lifting a single non-disassembly truss floor deck, the steel truss nodes can also serve as lifting points.

8. The method for constructing a self-insulating truss floor deck without disassembly according to claim 4, characterized in that: In step S3, reinforcement bars and side formwork should be set at the reserved pipe holes of the steel frame floor slab. The non-removable bottom formwork and the steel bars at the opening can be cut only after the floor slab concrete reaches the design strength. When the steel frame is cut before concrete pouring, temporary supports should be set under the cut steel bridges on both sides of the opening.

9. The method for constructing a self-insulating truss floor deck without disassembly according to claim 4, characterized in that: In step S4, the support length of the non-removable truss floor deck in the longitudinal direction (referring to the distance between the edge of the upper flange of the steel beam and the end vertical support steel bar) should not be less than 5 times the diameter of the bottom chord steel bar and should not be less than 50 mm.

10. The method for constructing a self-insulating truss floor deck without disassembly according to claim 4, characterized in that: Before the concrete strength reaches 100% of the design strength grade value, the load on the slab shall not exceed the sum of the design value of the permanent load during the construction phase and the standard value of the variable load.

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