Steel bar truss floor support plate composite floor

Abstract

The utility model relates to the field of assembly type building structures, in particular to a steel bar truss floor support plate composite floor slab which comprises at least two floor slab single bodies, each floor slab single body comprises a bottom plate and a plurality of trusses arranged in parallel, each truss comprises an upper chord steel bar, two lower chord steel bars and two web member steel bars, and the upper chord steel bars and the lower chord steel bars are arranged up and down. The length axis of the upper chord steel bar is parallel to that of the lower chord steel bar, and two ends of the lower chord steel bar extend out of the bottom plate and are suspended; the two floor slab single bodies are spliced in a staggered joint mode in the length direction, and the lower chord ribs on the two floor slab single bodies are inserted into each other. The lower chord rib can replace all plate bottom steel bars in a one-way mode, the steel consumption can be reduced, meanwhile, due to the fact that the truss lower chord rib is lengthened, the problem that the truss lower chord rib of a traditional steel bar truss floor support plate cannot enter a support is solved, a lower chord connecting steel bar does not need to be additionally arranged, and the steel consumption is further reduced.

Description

Technical Field

[0001] The utility model relates to the field of assembled building structures, in particular to a reinforced steel truss floor decking composite floor. Background Art

[0002] At present, in prefabricated buildings, reinforced concrete structures generally use aluminum film and composite panels to meet the assembly rate requirements. However, due to the large size changes of vertical components in frame structures, frame-shear wall structures, cylinders and other complex high-rise building structures, if aluminum molds are used to meet the assembly rate requirements, the cost will increase. In addition, since composite panels have a certain scope of application, it is difficult to meet the assembly rate requirements without aluminum film. At the same time, when the building height exceeds 50m, a cast-in-place floor structure should be used.

[0003] When the assembly rate requirements are met, reinforced truss floor decks come into being in reinforced concrete structures, and the truss lower chords are considered to replace the slab bottom reinforcement. However, when the truss lower chords are used to replace the floor slab bottom reinforcement, the lower chord connecting reinforcement must be added at the floor slab support because the truss lower chords cannot enter the support. The diameter and number of the lower chord connecting reinforcement are equal to the truss lower chords. This requirement will bring certain difficulties to the on-site construction, greatly reduce the construction speed, and to a certain extent, fail to fully play the role of the truss lower chords. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a steel bar truss floor deck composite floor to solve the problem of low construction efficiency caused by the arrangement of lower chord connecting steel bars.

[0005] The utility model is realized by the following technical solutions:

[0006] A reinforced steel truss floor deck composite floor comprises two floor units, the floor units comprise a bottom plate and a plurality of parallel trusses, the trusses comprise an upper chord steel bar, two lower chord steel bars and two web steel bars, the upper chord steel bar and the lower chord steel bar are arranged up and down, and the length axis of the upper chord steel bar is parallel to the length axis of the lower chord steel bar, the two web steel bars are symmetrically arranged on both sides of the upper chord steel bar, the web steel bars are in a broken line type, and the upper chord steel bar is connected to the bottom plate; the lower chord steel bar is connected to the web steel bar, and the lower chord steel bar is connected to the outside of the web steel bar; the length of the upper chord steel bar is the same as that of the bottom plate, and both ends of the lower chord steel bar extend out of the bottom plate and are suspended in the air;

[0007] The two floor slab units are staggered and spliced ​​in the length direction using supporting formwork, and the lower chords on the two floor slab units are inserted into each other.

[0008] Preferably, the length of both ends of the lower chord extending out of the bottom plate is 1 / 4L*, wherein L* is the span of the short sides of the two floor slab units, whichever is larger.

[0009] Preferably, it also includes a support transverse reinforcement, and both ends of the support transverse reinforcement are connected to two lower chords of the same truss.

[0010] Preferably, it also includes support vertical reinforcement, one end of the support vertical reinforcement is connected to the support transverse reinforcement, and the other end is connected to the upper chord reinforcement.

[0011] Preferably, during assembly, the insertion depth of the lower chord reinforcement of the floor slab unit exceeds the support transverse reinforcement of the floor slab unit connected thereto.

[0012] Preferably, the distance that the lower chord reinforcement is inserted into the support transverse reinforcement is greater than 5d and passes through the center line of the support, where d is the diameter of the lower chord reinforcement.

[0013] Preferably, the number of the supporting formworks is the same as the number of the floor slab units and corresponds one to one, and the supporting formworks and the floor slab units are perpendicular to each other, and the two supporting formworks are connected by tension bolts.

[0014] Preferably, detachable square timbers are provided between the tension bolts and the supporting formwork.

[0015] Preferably, a temporary support structure is provided at the bottom of the supporting formwork, and the temporary support structure includes connected columns and a top plate, the top plate is located at the bottom of the supporting formwork, and the columns are detachably connected to the top plate and the bottom plate.

[0016] Preferably, at least one reinforcing member is provided between the column and the top plate.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model adopts a steel bar truss floor deck composite floor slab with lower chords that can replace all the bottom steel bars in one direction. Compared with the traditional steel bar truss floor deck, it can reduce the amount of steel used. At the same time, because the lower chord of the truss is lengthened, this part has been prefabricated in the factory, which saves the problem that the lower chord of the truss of the traditional steel bar truss floor deck cannot enter the support, so there is no need to add additional lower chord connecting steel bars, which further saves the amount of steel used. In terms of construction, it reduces the workload of inserting the lower chord connecting steel bars during on-site construction, greatly improves construction efficiency, and reduces on-site construction costs.

[0019] Furthermore, the tension bolts are used to fix the two supporting formworks in the transverse direction.

[0020] Furthermore, the temporary support structure supports the formwork and the composite floor slab, and at the same time, with the help of square timber, plays a fixing role during on-site construction, and can be dismantled and recycled after use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the plan layout of a frame structure project using reinforced truss floor decking;

[0022] Figure 2 It is an overall three-dimensional diagram of the trusses in a composite floor slab of a reinforced steel truss floor deck of the utility model;

[0023] Figure 3 This is a vertical view of a truss floor deck in a composite floor slab of a reinforced steel truss floor deck of the utility model;

[0024] Figure 4 It is a cross-sectional view of a truss floor deck in a composite floor slab of a reinforced steel truss floor deck of the utility model;

[0025] Figure 5 It is a top view of a steel truss floor deck in a steel truss floor deck composite floor of the utility model;

[0026] Figure 6 It is the connection node between the reinforced truss floor deck and the intermediate support reinforced concrete beam;

[0027] Figure 7 It is the connection node between the reinforced truss floor deck and the end support reinforced concrete beam;

[0028] Figure 8 It is the connection node between the height difference reinforced truss floor deck and the intermediate support reinforced concrete beam;

[0029] Fig. 9 This is an enlarged view of the extended reinforcement bars at the lower chord of the extended reinforcement truss.

[0030] The markings in the figure are: 1. Upper chord reinforcement; 2. Lower chord reinforcement; 3. Web reinforcement; 4. Support transverse reinforcement; 5. Support vertical reinforcement; 6. Formwork; 7. Bottom plate; 8. Tension bolts; 9. Square timber; 10. Temporary support structure. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0032] The utility model discloses a steel bar truss floor decking composite floor, referring to Figure 1 , 2 , including two floor slab monomers, the floor slab monomer includes a bottom plate 7, a plurality of parallel trusses and a support formed by a support transverse rib 4 and a support vertical rib 5, wherein, with reference to Figure 3 , 4The truss includes an upper chord steel bar 1, two lower chord steel bars 2 and two web steel bars 3. The upper chord steel bar 1 and the lower chord steel bar 2 are arranged up and down, and the length axis of the upper chord steel bar 1 is parallel to the length axis of the lower chord steel bar 2. The two web steel bars 3 are symmetrically arranged on both sides of the upper chord steel bar 1. The web steel bars 3 are in a broken line type and connect the upper chord steel bar 1 with the bottom plate 7. The lower chord steel bar 2 is connected to the web steel bars 3, and the lower chord steel bar is connected to the outside of the web steel bars 3. The length of the upper chord steel bar 1 is the same as that of the bottom plate 7, and the two ends of the lower chord steel bar 2 extend out of the bottom plate 7 and hang in the air. In this embodiment, the length of the two ends of the lower chord steel bar 2 extending out of the bottom plate 7 is 1 / 4L*, where L* is the span of the short sides of the two floor slab monomers, and the larger one is taken. The extended length of the lower chord steel bar 2 is set according to the specification requirements to avoid waste due to excessive length, and also to avoid being too short and not meeting the strength requirements.

[0033] Both ends of the support transverse reinforcement 4 are welded to the two lower chord reinforcements 2 of the same truss, one end of the support vertical reinforcement 5 is welded to the support transverse reinforcement 4, and the other end is welded to the upper chord reinforcement 1.

[0034] Reference Figure 5 The two floor slab monomers are staggered and spliced ​​in the length direction by using the supporting formwork 6, and the lower chords 2 on the two floor slab monomers are inserted into each other. Figure 5 b is the spacing between truss bars, and b1 is the spacing between truss bars at the on-site joints in the vertical truss direction. In this embodiment, the number of support templates 6 is the same as the number of floor slab units and corresponds one to one, and the support templates 6 and the floor slab units are perpendicular to each other, and the two support templates 6 are connected by tension bolts 8. A detachable square wood 9 is arranged between the tension bolts 8 and the support templates 6.

[0035] Reference Figure 5 , 6 7. A temporary supporting structure 10 is provided at the bottom of the supporting formwork 6. The temporary supporting structure 10 includes connected columns and a top plate. The top plate is located at the bottom of the supporting formwork 6. The columns are detachably connected (such as bolted) to the top plate bottom plate 7.

[0036] During assembly, the insertion depth of the lower chord 2 of the floor unit exceeds the support transverse rib 4 of the floor unit connected thereto. In this embodiment, the distance of the lower chord 2 inserted into the support transverse rib 4 is greater than 5d and passes through the center line of the support, where d is the diameter of the lower chord, to ensure sufficient anchorage length, thereby ensuring the strength of the floor structure.

[0037] by Figure 1 The plan layout of a frame structure project shown in the figure uses the steel truss floor deck project as an example, in which the envelope plate thickness and the steel truss floor deck number are selected according to the specific situation in the actual project. The specific design, processing and construction process are as follows:

[0038] Step 1: Select the appropriate steel truss floor deck specifications according to the project;

[0039] Step 2: Based on the calculation results of the bottom reinforcement of the floor slab, return to check the specifications of the steel truss floor deck;

[0040] Step 3: According to step 2, add truss bottom chord 2 in the drawing to replace the bottom slab reinforcement description and related nodes;

[0041] Step 4: Based on the results of steps 2 and 3, Party A submits the details to the manufacturer for deepening and processing of the steel truss floor deck;

[0042] Step 5: According to step 4, the plate is deepened and the processed steel truss floor deck is transported to the project site for installation;

[0043] Step 6: When splicing the steel truss floor deck on site, ensure that the lower chord 2 of the truss enters the support more than 5d and passes the center line of the support;

[0044] Step 7: The joints of the steel truss floor decks on both sides need to be staggered to ensure the length of the support;

[0045] Step 8: Pour the concrete layer and maintain it until it is qualified.

[0046] Among them, Figure 6 7 (the middle support has the same height on both sides), 8 (the end support) and 10 (the middle support with height difference) are the connection nodes between the steel truss floor deck and the reinforced concrete beam. Figure 3 , 9 As shown, the steel truss floor decking manufacturer should use truss bars to replace the bottom steel bars according to the project requirements. The manufacturer should meet the following requirements when processing 2 Figure 6 , 7 , 8 requirements.

[0047] The utility model adopts a steel bar truss floor deck composite floor slab with lower chords that can replace all the bottom steel bars in one direction. Compared with the traditional steel bar truss floor deck, it can reduce the amount of steel used. At the same time, because the lower chord of the truss is lengthened, this part has been prefabricated in the factory, which saves the problem that the lower chord of the truss of the traditional steel bar truss floor deck cannot enter the support, so there is no need to add additional lower chord connecting steel bars, which further saves the amount of steel used. In terms of construction, it reduces the workload of inserting the lower chord connecting steel bars during on-site construction, greatly improves construction efficiency, and reduces on-site construction costs.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A steel bar truss deck composite floor, characterized in that: The invention comprises two floor slab units, wherein the floor slab units comprise a bottom plate (7) and a plurality of parallel trusses, wherein the trusses comprise an upper chord steel bar (1), two lower chord steel bars (2) and two web steel bars (3), wherein the upper chord steel bar (1) and the lower chord steel bar (2) are arranged vertically, and the length axis of the upper chord steel bar (1) is parallel to the length axis of the lower chord steel bar (2), and the two web steel bars (3) are symmetrically arranged on both sides of the upper chord steel bar (1), and the web steel bars (3) are in a broken line type and connect the upper chord steel bar (1) and the bottom plate (7); the lower chord steel bar (2) is connected to the web steel bar (3), and the lower chord steel bar is connected to the outer side of the web steel bar (3); the length of the upper chord steel bar (1) is the same as that of the bottom plate (7), and the two ends of the lower chord steel bar (2) extend out of the bottom plate (7) and are suspended in the air; It also includes a support transverse reinforcement (4), the two ends of which are connected to two lower chord reinforcements (2) of the same truss; and a support vertical reinforcement (5), one end of which is connected to the support transverse reinforcement (4), and the other end of which is connected to the upper chord reinforcement (1); Two floor slab units are staggered and spliced ​​in the length direction by using a supporting template (6), and the lower chord bars (2) on the two floor slab units are inserted into each other. During assembly, the insertion depth of the lower chord bar (2) of the floor slab unit exceeds the support transverse bar (4) of the floor slab unit connected thereto, and the distance that the lower chord bar (2) is inserted into the support transverse bar (4) is greater than 5d and passes through the center line of the support, wherein d is the diameter of the lower chord bar (2).

2. The steel bar truss floor deck composite floor according to claim 1, characterized in that: The length of the two ends of the lower chord (2) extending out of the bottom plate (7) is 1 / 4L*, wherein L* is the span of the short sides of the two floor slab units, whichever is greater.

3. The steel bar truss floor deck composite floor according to claim 1, characterized in that: The number of the supporting templates (6) is the same as the number of the floor slab monomers and corresponds one to one, and the supporting templates (6) and the floor slab monomers are perpendicular to each other, and the two supporting templates (6) are connected by tension bolts (8).

4. The steel bar truss floor deck composite floor according to claim 3, characterized in that: A detachable square wood (9) is arranged between the tension bolts (8) and the supporting formwork (6).

5. The steel bar truss floor deck composite floor according to claim 1, characterized in that: A temporary support structure (10) is arranged at the bottom of the support formwork (6), and the temporary support structure (10) comprises connected columns and a top plate, the top plate is located at the bottom of the support formwork (6), and the columns are detachably connected to the top plate bottom plate (7).

6. The steel bar truss deck composite floor according to claim 5, characterized in that: At least one reinforcing member is arranged between the column and the top plate.

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