A steel truss floor deck structure in a steel structure frame and a construction method thereof

Abstract

The present invention discloses a steel truss floor deck structure and construction method in a steel structure frame, relating to the field of floor deck structure construction, comprising a steel truss, a metal base plate, a bridge plate, and a locking fastener. The bridge plate is arranged between the steel trusses, with both ends of the bridge plate clamped to the steel trusses. The metal base plate is provided with a through hole, the bridge plate is located above the through hole of the metal base plate, one end of the locking fastener passes through the metal base plate and is clamped to the bridge plate. The bridge plate includes a first clamp and a second clamp, each of the first clamp and the second clamp is provided with a clamping groove, the clamping groove being clamped to the lower chord steel bar, the first clamp is provided with a plug plate, the second clamp is provided with a plug plate groove, the plug plate of the first clamp is inserted into the plug plate groove of the second clamp, and a through hole is provided at the center of the overlap between the plug plate and the plug plate groove, which is concentric with the through hole of the metal base plate. The present invention has a simple structure, reduces the number of supporting fasteners, and can prevent the concrete slab from being damaged when the locking fastener is removed.

Description

Technical Field

[0001] The present invention belongs to the field of floor deck structure construction, and in particular relates to a steel bar truss floor deck structure in a steel structure frame and a construction method. Background Art

[0002] With the increasing promotion and application of green construction technologies, and the increasing demand for prefabrication and assembly rates in steel structural frames for construction projects, unsupported steel truss floor decks are now preferred. These decks are prefabricated by welding steel trusses and galvanized steel sheets (base formwork) together in the factory. These decks are then transported to the site, fixed to steel beams, and poured with concrete to form the steel frame floor. No formwork or support installation is required during construction, saving both time and materials.

[0003] Chinese patent CN 103397728B discloses a modular steel truss floor deck with a detachable formwork panel and adjustable thickness. The detachable structural design allows the base plate to be reused. However, the floor deck requires the installation of multiple supporting fasteners. When the supporting fasteners need to be removed, since the concrete slab has solidified into a whole, the hook head will still be damaged when it is lifted up to remove it, which is not conducive to maintaining the consistency of the floor deck.

[0004] Therefore, providing a steel truss floor deck structure and construction method that is easy to install and does not damage the concrete slab becomes a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a steel truss floor decking structure and construction method in a steel structure frame. The present invention can solve the problem of insufficient turnover times and insufficient utilization of the metal base plate through the design of the bridging plate and the locking fasteners, and can reduce the number of locking fasteners without damaging the concrete slab. It is not easy to loosen under dynamic load during construction and is firm and stable.

[0006] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a steel truss floor deck structure in a steel structure frame, comprising a steel truss, a metal base plate, a bridging plate and a locking fastener, the bridging plate being arranged between the steel trusses, the two ends of the bridging plate being clamped on the steel trusses, the metal base plate being provided with a through hole, the bridging plate being located above the through hole of the metal base plate, one end of the locking fastener passing through the metal base plate and clamped with the bridging plate, the bridging plate comprising a first clamp and a second clamp, one end of each of the first clamp and the second clamp being provided with a clamping groove, the clamping groove being clamped on the lower chord steel bar of the steel truss, the other end of the first clamp being provided with a plug-in plate, the other end of the second clamp being provided with a plug-in plate groove, the plug-in plate of the first clamp being inserted into the plug-in plate groove of the second clamp, and a through hole concentric with the through hole of the metal base plate being provided at the center of the overlapping part of the plug-in plate and the plug-in plate groove.

[0007] Furthermore, it also includes a compression spring, which is placed in the plug-in plate slot. The first clip is inserted into the slot of the second clip and conflicts with the compression spring. The through hole set on the plug-in plate of the first clip is a strip hole.

[0008] Furthermore, the locking fastener includes a locking base, a locking mechanism and a retracting mechanism. The locking mechanism is slidably arranged in the locking base, the retracting mechanism is arranged on the locking base, and the retracting mechanism is transmission-connected to the locking mechanism.

[0009] Furthermore, the retraction mechanism includes a movable limit block and a telescopic spring, the locking base is provided with four evenly arranged locking grooves, the movable limit block is provided with a baffle, the movable limit blocks are all slidably restricted in the locking groove by the baffle, the locking head of the movable limit block extends out of the locking groove, one end of the telescopic spring conflicts with the locking groove, and the other end of the telescopic spring conflicts with the baffle.

[0010] Furthermore, the locking mechanism includes a limit block, a rotating shaft, a reset spring and a connecting plate. The rotating shaft is rotatably arranged in the locking base. The limit block is mounted on the rotating shaft and is rotatably connected to the rotating shaft. The limit block is threadedly connected to the locking base. The reset spring is mounted on the rotating shaft and is used to reset the rotating shaft. One end of the connecting plate is rotatably connected to the rotating shaft, and the other end of the connecting plate is clamped with the movable limit block.

[0011] Furthermore, a sealing gasket is included, which is arranged between the movable limiting block and the bridging plate to prevent concrete from overflowing.

[0012] Furthermore, it also includes a knob, which is fixedly arranged on the top end of the rotating shaft and is rotatably connected to the limit block.

[0013] Furthermore, a strip-shaped slot is provided in the middle of one side of the metal substrate, and a strip-shaped block is provided on the other side of the metal substrate to fit in the strip-shaped slot with a gap.

[0014] A construction method for a steel truss floor deck structure in a steel structure frame comprises the following construction steps:

[0015] S01. Welding of steel trusses;

[0016] S02. Install a bridge plate in the middle of the steel truss so that both ends of the bridge plate are respectively connected to the lower chord steel bars of the steel truss;

[0017] S03. Push the locking fastener through the through-hole of the metal substrate and the locking hole of the bridge plate until the limit stopper abuts against the metal substrate, and the metal substrate is mounted on the bridge plate by the locking fastener;

[0018] S04. In the pouring floor layer position uniformly arranged steel trusses are set, the ends of the steel trusses are fixed to the main frame beams, the strip card blocks of the metal substrate are inserted into the adjacent strip card slots of the metal substrate;

[0019] S05. Pouring concrete on top of the precast floor deck to form a cast floor layer;

[0020] S06. After the concrete solidifies, disassemble the metal base plate. During disassembly, rotate the locking fastener until the movable limit block shrinks to the locking groove, then pull the locking fastener outward to remove the metal base plate.

[0021] The beneficial effects of the present invention are:

[0022] The present invention has a simple structure. By setting the bridge plate, the number of supporting fasteners is reduced, and the steel truss can be prefabricated in advance without welding, which improves construction efficiency. The setting of the locking fastener simplifies the fixing method of the metal base plate and the steel truss. By replacing the limit blocks and top covers of different heights, it can be suitable for base plates of different thicknesses. When the locking fastener is taken out after the concrete is solidified, the structure of the concrete plate will not be damaged because the movable limit block is directly retracted. The plug-in connection between adjacent metal plates avoids leakage of concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the bridge plate structure of the present invention;

[0025] Figure 3 Schematic cross-sectional view of the metal substrate of the present invention;

[0026] Figure 4is a cross-sectional view of the locking fastener of the present invention;

[0027] Figure 5 Schematic diagram of the locking mechanism structure of the present invention;

[0028] Figure 6 It is a schematic diagram of the contraction mechanism structure of the present invention.

[0029] In the figure: 1-steel truss; 2-metal base plate; 201-strip slot; 202-strip block; 3-bridging plate; 301-first buckle; 302-second buckle; 303-compression spring; 304-insert plate; 305-insert plate slot; 4-locking fastener; 401-locking base; 402-movable limit block; 403-telescopic spring; 404-baffle; 405-limit block; 406-rotating shaft; 407-reset spring; 408-connecting plate; 409-knob; 410-lock head; 5-sealing gasket. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "horizontal", "inner", "outer", "one side", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example 1

[0033] like Figure 1-6 As shown, this embodiment provides a steel truss floor deck structure in a steel structure frame, including a steel truss 1, a metal base plate 2, a bridging plate 3 and a locking fastener 4. The bridging plate 3 is arranged between the steel trusses 1, and both ends of the bridging plate 3 are clamped on the steel truss 1. A through hole is provided on the metal base plate 2. The bridging plate 3 is located above the through hole of the metal base plate 2, and one end of the locking fastener 4 passes through the metal base plate 2 and is clamped with the bridging plate 3.

[0034] A strip-shaped slot 201 is provided in the middle of one side of the metal substrate 2 of the present invention, and a strip-shaped block 202 is provided on the other side of the metal substrate 2, which is loosely matched with the strip-shaped slot 201, so as to realize rapid docking of the metal substrates and prevent concrete from overflowing from the gaps between adjacent metal substrates 2.

[0035] The bridging plate 3 includes a first clip 301, a second clip 302 and a compression spring 303. One end of the first clip 301 and the second clip 302 is provided with a clipping groove, which is clipped onto the lower chord steel bar of the steel truss 1. The other end of the first clip 301 is provided with a plug-in plate 304, and a strip hole is longitudinally provided on the plug-in plate 304. The other end of the second clip 302 is correspondingly provided with a plug-in plate groove 305, and a limiting hole is longitudinally provided on the plug-in plate groove. The compression spring 303 is placed in the plug-in plate groove 305. The other end of the first clip 301 is inserted into the plug-in plate groove 305 of the second clip 302 and conflicts with the compression spring 303.

[0036] The locking fastener 4 includes a locking base 401 , a locking mechanism and a retracting mechanism. The locking mechanism is slidably arranged in the locking base 401 , and the retracting mechanism is arranged on the locking base 401 . The retracting mechanism is transmission-connected to the locking mechanism.

[0037] The retraction mechanism includes a movable limit block 402 and a telescopic spring 403. The locking base 401 is evenly provided with four locking grooves. A baffle 404 is provided on the movable limit block 402. The movable limit block 402 is slidingly restricted in the locking groove by the baffle 404. The locking head 410 of the movable limit block 402 extends out of the locking groove. One end of the telescopic spring 403 conflicts with the locking groove, and the other end of the telescopic spring 403 conflicts with the baffle 404. The telescopic spring 403 can make the locking head 410 of the movable limit block 402 extend out of the locking groove to clamp the bridge plate 3.

[0038] As a preferred embodiment of the present invention, a sealing gasket 5 is further provided between the locking head 410 of the movable limiting block 402 and the bridging plate 3 to prevent overflow of concrete.

[0039] The locking mechanism includes a limit block 405, a rotating shaft 406, a return spring 407, a connecting plate 408 and a knob 409. The rotating shaft 406 is rotatably set in the locking base 401, the limit block 405 is sleeved on the rotating shaft 406 and is rotatably connected to the rotating shaft 406, the return spring 407 is sleeved on the rotating shaft 406 and is used to reset the rotating shaft 406, one end of the connecting plate 408 is rotatably connected to the rotating shaft 406, and the other end of the connecting plate 408 is clamped with the movable limit block 402, and the knob 409 is fixedly connected to the top of the rotating shaft 406 by a thread, and the knob 409 is rotatably connected to the limit block 405. By rotating the knob 409, the connecting plate 408 can be pulled to drive the movable limit block 402 to retract, thereby realizing the disengagement of the locking fastener 4.

[0040] Example 2

[0041] This embodiment discloses a construction method of a steel truss floor deck structure in a steel structure frame, comprising the following steps:

[0042] S01. Welding of steel truss 1;

[0043] S02. Install the bridge plate 3 in the middle of the steel truss 1, so that both ends of the bridge plate 3 are respectively connected to the lower chord steel bars of the steel truss 1;

[0044] S03. Push the locking fastener 4 through the through hole of the metal substrate 2 and the locking hole of the bridge plate 3 until the limit stopper 405 abuts against the metal substrate 2, and the metal substrate 2 is mounted on the bridge plate 3 by the locking fastener 4;

[0045] S04. In the pouring floor layer position uniformly arranged steel trusses 1, the two ends of the steel trusses 1 are fixed to the main frame beam, the strip card block 202 of the metal substrate 2 is inserted in the adjacent strip card slot 201 of the metal substrate 2;

[0046] S05. Pouring concrete on top of the precast floor deck to form a cast floor layer;

[0047] S06. After the concrete solidifies, the metal base plate 2 is disassembled. During disassembly, the locking fastener 4 is rotated until the movable limit block 402 is retracted into the locking groove, and then the locking fastener 4 is pulled outward to remove the metal base plate 2.

[0048] The above are merely preferred embodiments of the present invention and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A steel truss floor deck structure in a steel structure frame, characterized by: The invention comprises a steel bar truss, a metal base plate, a bridging plate and a locking fastener, wherein the bridging plate is arranged between the steel bar trusses, and both ends of the bridging plate are clamped on the steel bar truss, a through hole is provided on the metal base plate, the bridging plate is located above the through hole of the metal base plate, one end of the locking fastener passes through the metal base plate and is clamped with the bridging plate, the bridging plate comprises a first clamp and a second clamp, one end of each of the first clamp and the second clamp is provided with a clamping groove, the clamping groove is clamped on the lower chord steel bar of the steel bar truss, the other end of the first clamp is provided with a plug-in plate, the other end of the second clamp is provided with a plug-in plate groove, the plug-in plate of the first clamp is plugged into the plug-in plate groove of the second clamp, and a through hole concentric with the through hole of the metal base plate is provided at the center of the overlap of the plug-in plate and the plug-in plate groove; The locking fastener includes a locking base, a locking mechanism and a retracting mechanism, wherein the locking mechanism is slidably arranged in the locking base, the retracting mechanism is arranged on the locking base, and the retracting mechanism is transmission-connected to the locking mechanism; The retraction mechanism includes a movable limit block and a telescopic spring, the locking base is evenly provided with four locking grooves, the movable limit block is provided with a baffle, the movable limit blocks are slidably restricted in the locking grooves by the baffle, the locking head of the movable limit block extends out of the locking groove, one end of the telescopic spring is in conflict with the locking groove, and the other end of the telescopic spring is in conflict with the baffle; The locking mechanism includes a limit block, a rotating shaft, a return spring and a connecting plate. The rotating shaft is rotatably arranged in the locking base. The limit block is sleeved on the rotating shaft and is rotatably connected to the rotating shaft. The limit block is threadedly connected to the locking base. The return spring is sleeved on the rotating shaft for resetting the rotating shaft. One end of the connecting plate is rotatably connected to the rotating shaft, and the other end of the connecting plate is clamped with the movable limit block. It also includes a knob, which is fixedly arranged on the top end of the rotating shaft and is rotatably connected to the limit block.

2. The steel truss floor deck structure in a steel structure frame according to claim 1, characterized in that: It also includes a compression spring, which is placed in the plug-in plate slot. The first clip is inserted into the plug-in plate slot of the second clip and conflicts with the compression spring. The through hole set on the plug-in plate of the first clip is a strip hole.

3. The steel truss floor deck structure in a steel structure frame according to claim 1, characterized in that: It also includes a sealing gasket, which is arranged between the movable limiting block and the bridging plate to prevent concrete from overflowing.

4. The steel truss floor deck structure in a steel structure frame according to claim 1, characterized in that: A strip-shaped card slot is provided in the middle of one side of the metal substrate, and a strip-shaped card block is provided on the other side of the metal substrate and is gap-matched with the strip-shaped card slot.

5. The construction method of a steel truss floor deck structure in a steel structure frame according to any one of claims 1 to 4, characterized in that: The construction steps include: S01. Welding of steel trusses; S02. Install a bridge plate in the middle of the steel truss so that both ends of the bridge plate are respectively connected to the lower chord steel bars of the steel truss; S03. Push the locking fastener through the through-hole of the metal substrate and the through-hole of the bridge plate until the limit stopper abuts against the metal substrate, and the metal substrate is mounted on the bridge plate by the locking fastener; S04. In the pouring floor layer position uniformly arranged steel trusses are set, the ends of the steel trusses are fixed to the main frame beams, the strip card blocks of the metal substrate are inserted into the adjacent strip card slots of the metal substrate; S05. Pouring concrete on top of the precast floor deck to form a cast floor layer; S06. After the concrete solidifies, disassemble the metal base plate. During disassembly, rotate the locking fastener until the movable limit block shrinks to the locking groove, then pull the locking fastener outward to remove the metal base plate.

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