阅读说明：本技术 桁架楼层板 (Truss floor plate ) 是由 周建滨 王志国 孟凡超 刘亚莉 杜坤 曹荣利 王浩 岳琪 王勇 于 2021-10-14 设计创作，主要内容包括：本发明提供的一种桁架楼层板包括桁架10、底模20、连接件30,所述桁架10包括一个上弦筋11、一对下弦筋12及一对腹杆13,所述上弦筋11与一对下弦筋12互相平行且与该一对下弦筋12等距离设置,所述上弦筋11通过一对腹杆13分别与一对下弦筋12连接,其特征在于,所述连接件30包括底座31和卡扣33,所述底座31顶端设置圆弧凹槽32,下弦筋12设置在底座31顶端圆弧凹槽32内并被卡扣33固定,所述底座31底端通过螺钉34固定到底模20上。本发明提供的桁架楼层板具有以下优点：连接件兼具混凝土保护层垫块作用；生产工艺简单,运输施工方便；按传统钢筋混凝土楼板设计,不需设置后浇带；保证室内净高,工程造价相对较低。(The invention provides a truss floor slab which comprises a truss 10, a bottom die 20 and a connecting piece 30, wherein the truss 10 comprises an upper chord rib 11, a pair of lower chord ribs 12 and a pair of web members 13, the upper chord rib 11 and the pair of lower chord ribs 12 are parallel to each other and are arranged at equal intervals with the pair of lower chord ribs 12, the upper chord rib 11 is respectively connected with the pair of lower chord ribs 12 through the pair of web members 13, the truss floor slab is characterized in that the connecting piece 30 comprises a base 31 and a buckle 33, an arc groove 32 is arranged at the top end of the base 31, the lower chord ribs 12 are arranged in the arc groove 32 at the top end of the base 31 and are fixed by the buckle 33, and the bottom end of the base 31 is fixed on the bottom die 20 through screws 34. The truss floor plate provided by the invention has the following advantages: the connecting piece has the function of a concrete protective layer cushion block; the production process is simple, and the transportation and construction are convenient; according to the design of the traditional reinforced concrete floor slab, a post-cast strip is not required to be arranged; ensuring indoor clear height and relatively low construction cost.)

1. Truss floor board, including truss (10), die block (20), connecting piece (30), truss (10) include one last chord muscle (11), a pair of lower chord muscle (12) and a pair of web member (13), last chord muscle (11) and a pair of lower chord muscle (12) are parallel to each other and set up with this a pair of lower chord muscle (12) equidistance, last chord muscle (11) are connected with a pair of lower chord muscle (12) respectively through a pair of web member (13), its characterized in that, connecting piece (30) include base (31) and buckle (33), base (31) top sets up circular arc recess (32), and lower chord muscle (12) set up in base (31) top circular arc recess (32) and are fixed by buckle (33), base (31) bottom is fixed to die block 20 through screw (34).

2. The truss floor panel as claimed in claim 1, wherein the base (31) is provided as a hollow structure.

3. The truss floor slab as claimed in claim 2, wherein the number of the hollow structures provided on the base (31) is two or more.

4. The truss floor plate as claimed in any one of claims 1 to 3, wherein the arc groove (32) provided at the top end of the base (31) has a central angle of 180 degrees or more and 200 degrees or less, the buckle (33) has an arc groove, and the central angle of the arc segment of the arc groove is 160 degrees or more and 180 degrees or less.

5. The truss floor panel as claimed in any one of claims 1 to 3, wherein the bottom form (20) is a fiber cement slab.

6. The truss floor panel of claim 4, wherein the bottom form (20) is a fiber cement slab.

7. The truss floor panel as claimed in any one of claims 1 to 3, wherein the connecting members (30) are a plurality; when fixed to the lower chord (12), the connectors (30) are respectively connected to one chord of the pair of lower chord (12) or two chords of the pair of lower chord (12); the connecting members (30) are each connected to one of the pair of web members (13) or to both of the pair of web members (13) when they are secured to the lower projecting portions of the web members (13).

8. The truss floor panel as claimed in claim 4, wherein the connecting members (30) are a plurality; when fixed to the lower chord (12), the connectors (30) are respectively connected to one chord of the pair of lower chord (12) or two chords of the pair of lower chord (12); the connecting members (30) are each connected to one of the pair of web members (13) or to both of the pair of web members (13) when they are secured to the lower projecting portions of the web members (13).

9. The truss floor panel as claimed in claim 5, wherein the connecting members (30) are a plurality; when fixed to the lower chord (12), the connectors (30) are respectively connected to one chord of the pair of lower chord (12) or two chords of the pair of lower chord (12); the connecting members (30) are each connected to one of the pair of web members (13) or to both of the pair of web members (13) when they are secured to the lower projecting portions of the web members (13).

10. The truss floor panel as claimed in any one of claims 1 to 3, wherein at least one truss (10) is provided, and when there are two or more truss (10), they are arranged parallel to each other.

Technical Field

The invention relates to a building prefabricated part, in particular to a truss floor plate, which is used for bearing the dead weight and the construction load of cast-in-place concrete in building construction and is superposed with the cast-in-place concrete into a whole to form a floor plate or a floor slab.

Background

Fabricated buildings are buildings assembled on site from prefabricated parts. At present, the assembly type building technology of overseas European and American developed countries is mature, the adoption of industrial production and assembly type construction becomes a main construction mode, and most prefabricated parts and components realize standardization, serialization and industrialization. China introduces foreign assembly type building technology from the end of the last century, and particularly, the country vigorously pushes assembly type building in recent years. The social investment projects are brought into the construction condition opinions, the proportion of the assembled building is definite, and the proportion reaches more than 25 percent at present and reaches more than 40 percent by 2025 years. Calculated according to 3.2 hundred million square meters of newly-worked building area per year in the current province, the number of the newly-worked building area per year can reach more than 1.2 hundred million square meters per year.

At present prefabricated staircase, balcony, superimposed sheet have obtained a large amount of popularization and application, have played positive promotion effect to the development of assembly type structure. However, there are many disadvantages and problems associated with precast concrete composite slabs, which restrict the rapid development of prefabricated buildings, including the following aspects: firstly, the production technology is complicated, and the transportation installation is inconvenient, secondly need set up the post-cast strip, and the construction degree of difficulty is big, and thirdly reduces indoor net height, and engineering cost is higher relatively.

Disclosure of Invention

The invention aims to provide a truss floor slab which can solve the defects in the prior art. The truss floor plate provided by the invention has the advantages of simple production process and convenience in transportation and construction; the building can be designed according to the traditional reinforced concrete floor without arranging a post-cast strip; ensuring the indoor clear height, and the obvious technical progress and the outstanding technical effect of relatively low construction cost.

In order to achieve the purpose, the invention is realized by the following technical scheme:

truss floor board, including truss 10, die block 20, connecting piece 30, truss 10 includes a last chord muscle 11, a pair of lower chord muscle 12 and a pair of web member 13, last chord muscle 11 is parallel to each other and sets up with this a pair of lower chord muscle 12 equidistance with a pair of lower chord muscle 12 with a pair of web member 12, last chord muscle 11 is connected with a pair of lower chord muscle 12 respectively through a pair of web member 13, connecting piece 30 includes base 31 and buckle 33, base 31 top sets up circular arc recess 32, and lower chord muscle 12 sets up in base 31 top circular arc recess 32 and is fixed by buckle 33, screw 34 is passed through to base 31 bottom and is fixed to die block 20.

Further, in the truss floor slab, the base 31 is provided with a hole penetrating through the body.

Further, in the truss floor slab, two or more holes penetrating through the base 31 are provided.

Further, as for the truss floor plate, the central angle degree of the arc groove 32 formed in the top end of the base 31 is greater than or equal to 180 degrees and less than or equal to 200 degrees, the buckle 33 is provided with the arc groove, and the central angle degree of the arc section of the arc groove is greater than or equal to 160 degrees and less than or equal to 180 degrees.

Further, in the truss floor slab, the bottom mold 20 is a fiber cement slab.

Further, as for the truss floor plate, the number of the connecting pieces 30 is several; when it is fixed to the lower-chord wire 12, the connectors 30 are each connected to one of the pair of lower-chord wires 12, or to both of the pair of lower-chord wires 12, respectively; the connecting members 30 are each connected to one of the pair of web members 13, or to both of the pair of web members 13, when they are secured to the lower projecting portions of the web members 13.

Further, in the truss floor slab as described above, at least one truss 10 is provided, and when two or more trusses 10 are provided, they are arranged in parallel with each other.

In the invention:

the truss floor plate is a three-dimensional combined template which integrates a truss and a flat plate (a disassembly-free bottom die) so as to bear the self weight of cast-in-place concrete and construction load;

the fiber cement flat plate is a plate prepared by molding, pressurizing and autoclaving cement serving as a cementing material and organic synthetic fibers, inorganic mineral fibers or cellulose fibers serving as a reinforcing material; in order to ensure that the fiber cement flat plate can bear the self weight and the construction load of cast-in-place concrete in the construction process, the performance index of the fiber cement flat plate is controlled in the following range: apparent density of 1.0-1.5 g/cm3, water absorption of 20-35%, wet expansion rate of 0.2-0.3%, water retention and breaking strength of 10-20%, impact strength of 1.5-3.0 KJ/m2, aspect ratio of 55-65%, and breaking strength ratio of 65-75%;

the truss refers to a structure in which the rods are connected to each other. Preferably, the steel bars are used as rod members to form a plane or space structure with triangular units, and the plane or space structure comprises an upper chord, a pair of lower chords and web members which are connected with each other through resistance spot welding.

The connecting piece is a special connecting piece for connecting the truss and the fiber cement flat plate (bottom die).

The truss floor plate provided by the invention is a three-dimensional combined floor bearing plate which integrates a truss and a flat plate (a disassembly-free bottom die), is particularly suitable for concrete and steel structure fabricated buildings in areas with 8 degrees and below 8 degrees of seismic fortification intensity, and has the following beneficial technical effects. 1. According to the design of the traditional reinforced concrete floor slab, a post-cast strip is not required to be arranged. The thickness of the bottom die of the truss floor slab provided by the invention is generally 10-20 mm, the truss floor slab does not participate in structural stress calculation, the floor slab design is designed according to the common cast-in-place concrete floor slab, and the design and calculation are simple. The upper side of the bottom die can be laid with a full-length transverse stress reinforcing steel bar, and a concrete post-pouring belt is not needed at the joint of the plate joints, so that the construction is convenient. 2. The connecting piece has the effect of concrete protective layer cushion concurrently. According to the truss floor plate, the connecting piece has the function of the concrete protective layer cushion block, enough space is reserved between the truss lower chord steel bars and the upper side of the bottom die, the full-length transverse stress steel bars additionally arranged in construction are reserved, concrete is poured in the reserved space in the construction process, the thickness of the outermost layer of the reinforced concrete protective layer can be well guaranteed, and the service lives of the truss lower chord steel bars and the transverse stress steel bars additionally arranged are guaranteed. 3. Ensuring indoor clear height and relatively low construction cost. Compared with the precast concrete composite slab, the truss floor slab provided by the invention is applied to a middle-span floor slab and a small-span floor slab, the thickness of the floor slab can be reduced, the clear height of the floor slab is ensured, the surface of a floor slab bottom mold is smooth, and the truss floor slab can replace a floor slab cast-in-place concrete template to meet the plastering-free requirement. The living comfort of the house is ensured, and the construction cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of a truss floor panel provided in accordance with the present invention;

FIG. 2 is a schematic structural view of a second embodiment of a truss floor panel provided in accordance with the present invention;

FIG. 3 is a schematic structural view of a third embodiment of a truss floor panel provided in accordance with the present invention;

FIG. 4 is a schematic structural view of a fourth embodiment of the truss floor panel provided in accordance with the present invention;

fig. 5 is a perspective view of a truss floor panel provided by the present invention.

Wherein: 10-truss, 11-upper chord rib, 12-lower chord rib 13-web member, 20-bottom die, 30-connecting piece, 31-base, 32-arc groove, 33-buckle and 34-screw.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

The structures, ratios, sizes, and the like of the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the efficacy and the achievable purpose of the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.

In this embodiment:

referring to fig. 1 to 2, the truss floor slab provided by the invention comprises a truss 10, a bottom mold 20 and a connecting member 30, wherein the truss 10 is fixed to the bottom mold 20 through the connecting member 30, the connecting member 30 comprises a cavity member 31 and a fastener 32, the connecting member 30 comprises a base 31 and a buckle 33, an arc groove 32 is arranged at the top end of the base 31, a lower chord 12 is arranged in the arc groove 32 at the top end of the base 31 and is fixed by the buckle 33, and the bottom end of the base 31 is fixed to the bottom mold 20 through a screw 34. The truss 10 uses steel bars as rod members to form a plane and space structure with triangular units, and comprises an upper chord rib 11, a pair of lower chord ribs 12 and a pair of web members 13 which are connected with each other through resistance spot welding. The upper chord ribs 11 and the pair of lower chord ribs 12 are parallel to each other and are arranged at equal intervals with the pair of lower chord ribs 12, the upper chord ribs 11 are respectively connected with the pair of lower chord ribs 12 through a pair of web members 13, the pair of lower chord ribs 12 are connected with a plurality of connecting pieces 30, and the connecting pieces 30 are respectively connected to one of the pair of lower chord ribs 12. Preferably, the upper chord steel bar of the steel bar truss is HRB 400-grade steel bar, the lower chord steel bar is CRB 600-grade steel bar, and the web members are HPB 300-grade steel bars. Further, in order to reduce the cost and achieve a more secure connection between the base 31 and the truss 10 and the bottom mold 20, the base 31 is provided with holes penetrating through the body, and two or more holes may be provided as described above.

The central angle degree of the arc groove 32 arranged at the top end of the base 31 is equal to 180 degrees, the buckle 33 is provided with an arc groove, and the central angle degree of the arc section of the arc groove is equal to 180 degrees.

In this embodiment:

referring to fig. 1 to 2, the truss floor slab provided by the present invention has a plane and space structure with triangular units, which is formed by connecting an upper chord 11, a pair of lower chord 12 and a pair of web members 13 by resistance spot welding, wherein the truss 10 uses steel bars as members. The upper chord ribs 11 and the pair of lower chord ribs 12 are parallel to each other and are arranged at equal intervals with the pair of lower chord ribs 12, the upper chord ribs 11 are respectively connected with the pair of lower chord ribs 12 through a pair of web members 13, the pair of lower chord ribs 12 are connected with a plurality of connecting pieces 30, and two ends of each connecting piece 30 are respectively connected to two chords of the pair of lower chord ribs 12.

The central angle degree of the arc groove 32 arranged at the top end of the base 31 is 200 degrees, and the buckle 33 is of a straight structure.

In this embodiment:

referring to fig. 3 to 4, the truss floor slab provided by the present invention has a plane and space structure with triangular units, which is formed by connecting an upper chord 11, a pair of lower chord 12 and a pair of web members 13 by resistance spot welding, wherein the truss 10 uses steel bars as members. The upper chord ribs 11 and the pair of lower chord ribs 12 are parallel to each other and are arranged at equal intervals with the pair of lower chord ribs 12, the upper chord ribs 11 are respectively connected with the pair of lower chord ribs 12 through a pair of web members 13, the lower parts of the web members 13 are provided with convex parts, the convex parts of the lower parts of the web members 13 are connected with a plurality of connecting pieces 30, and the connecting pieces 30 are respectively connected on the convex parts of the lower parts of the web members 13.

The central angle degree of the arc groove 32 arranged at the top end of the base 31 is 200 degrees, the buckle 33 is provided with an arc groove, and the central angle degree of the arc section of the arc groove is equal to 160 degrees.

In this embodiment:

referring to fig. 5, in the truss floor slab according to the present invention, five trusses 10 are disposed on a bottom mold 20, and the five trusses 10 are disposed in parallel with each other.

In order to overcome the defects of large self weight, large thickness and large construction difficulty in the concrete pouring process of the traditional precast concrete bottom die, a fiber cement flat plate is preferably selected as the bottom die 20. In order to ensure that the fiber cement flat plate can bear the self weight and the construction load of cast-in-place concrete in the construction process, the performance index of the fiber cement flat plate is controlled in the following range: apparent density of 1.0-1.5 g/cm3, water absorption of 20-35%, wet expansion rate of 0.2-0.3%, water retention and breaking strength of 10-20%, impact strength of 1.5-3.0 KJ/m2, aspect ratio of 55-65%, and breaking strength of 65-75%.

In conclusion, the truss floor plate provided by the invention is a three-dimensional combined floor bearing plate which is formed by connecting a steel bar truss and a fiber cement flat plate into a whole, and has the following technical progress and economic benefit.

1. According to the design of the traditional reinforced concrete floor slab, a post-cast strip is not required to be arranged. The thickness of the bottom die of the truss floor slab provided by the invention is generally 10-20 mm, the truss floor slab does not participate in structural stress calculation, the floor slab design is designed according to the common cast-in-place concrete floor slab, and the design and calculation are simple. The upper side of the bottom die can be laid with a full-length transverse stress reinforcing steel bar, and a concrete post-pouring belt is not needed at the joint of the plate joints, so that the construction is convenient.

2. The connecting piece has the effect of concrete protective layer cushion concurrently. According to the truss floor plate, the connecting piece has the function of the concrete protective layer cushion block, enough space is reserved between the truss lower chord steel bars and the upper side of the bottom die, the full-length transverse stress steel bars additionally arranged in construction are reserved, concrete is poured in the reserved space in the construction process, the thickness of the outermost layer of the reinforced concrete protective layer can be well guaranteed, and the service lives of the truss lower chord steel bars and the transverse stress steel bars additionally arranged are guaranteed.

3. Ensuring indoor clear height and relatively low construction cost. Compared with the precast concrete composite slab, the truss floor slab provided by the invention is applied to a middle-span floor slab and a small-span floor slab, the thickness of the floor slab can be reduced, the clear height of the floor slab is ensured, the surface of a floor slab bottom mold is smooth, and the truss floor slab can replace a floor slab cast-in-place concrete template to meet the plastering-free requirement. The living comfort of the house is ensured, and the construction cost is reduced.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.