CN115110697A - Reinforced truss structure, superimposed floor slab and construction method thereof - Google Patents

Abstract

The invention is applicable to the technical field of construction engineering, and provides a steel bar truss structure, a laminated floor slab and a construction method thereof. on the periphery of the upper chord steel bar and the lower chord steel bar; the integrally formed frame member is formed by bending the steel bar in a triangular-like spiral, and an arc transition is formed at the bend; one upper chord steel bar and two The lower chord steel bars are respectively arranged at the arc positions of the corresponding bending places, and are connected with the steel bars on the side of the arc position; the steel bar truss structure of the present invention solves the triangular steel bar truss commonly used at present, and the existing steel bars have a large amount of steel. The hoisting load is large, the production of steel bar trusses cannot realize fully automated steel bar processing, the production efficiency and degree of industrialization are low, and the comprehensive cost is high.

Description

Reinforced truss structure, superimposed floor slab and construction method thereof

technical field

The invention belongs to the technical field of construction engineering, and in particular relates to a steel bar truss structure, a laminated floor slab and a construction method thereof.

Background technique

The cast-in-place mode of traditional building construction has limitations such as large amount of engineering, many potential safety hazards, and low efficiency. The prefabricated construction method in which factory prefabricated components are transported to on-site assembly construction, as a representative advanced construction technology, can achieve the most resources. Optimize the configuration and utilization, and realize the standardized and orderly progress of construction activities in each link. While improving the construction efficiency and quality, it fully meets the development requirements of modern green buildings in the construction industry.

Prefabricated buildings have become the only way for the transformation and upgrading of the construction industry. Floor slab is the main load-bearing and component of housing construction, and is an important structural component of housing construction. At present, the floor slab of prefabricated houses mainly adopts the technology of reinforced truss superimposed floor slab, which belongs to a representative prefabricated component. The prefabricated floor slabs with steel trusses produced by the factory are standardized semi-finished products. After the prefabricated composite floor slabs are directly hoisted and transported to the site, they are assembled and assembled. The prefabricated slabs and poured concrete form a composite floor slab. The superimposed floor slab is integrated with other components such as beams and walls.

At present, the triangular reinforced truss is mainly used in the reinforced truss superimposed floor. The main function of this triangular reinforced truss is to solve the stress problem of the standardized semi-finished product of the prefabricated floor slab of the superimposed floor under the short-term design condition, so as to improve the rigidity of the prefabricated floor and avoid the problem of stress. The deformation of the floor slab increases the shear resistance between the prefabricated bottom plate and the cast-in-place layer at the superimposed surface of the floor slab concrete, avoids the sliding of the superimposed layer, and also acts as a "stirrup" in the process of superimposed assembly construction. This triangular reinforced truss composite floor has the following shortcomings:

The triangular reinforced truss makes the amount of steel used for the prefabricated laminated floor increase by 40-50% compared with the floor of the cast-in-place concrete structure, resulting in an increase in material and labor costs.

The triangular reinforced truss increases the weight of the prefabricated bottom plate of the prefabricated laminated floor, increases the hoisting load of the crane, and reduces the assembly construction efficiency.

The structure and manufacturing process of the triangular reinforced truss is complex, and there are many processes. Generally, the truss webs on both sides of the triangular reinforced truss are processed first, and then the truss webs on both sides are welded to the upper chord and upper chord steel bars of the truss respectively. The steel truss is placed in the specified position of the formwork. The processing of triangular steel bar trusses must involve manual participation, which cannot fully realize automatic processing, and the production efficiency and degree of industrialization are low.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a steel bar truss structure to solve the problems mentioned in the above background art.

The embodiment of the present invention is implemented in the following way: a steel bar truss structure, the steel bar truss structure includes an upper chord steel bar, a lower chord steel bar and an integrally formed frame member, and the integrally formed frame member is sleeved on the upper chord steel bar and the lower chord steel bar the periphery;

The integrally formed frame piece is formed by integrally bending steel bars in a triangular-like spiral, and an arc transition is formed at the bend;

One of the upper chord steel bars and the two described lower chord steel bars are respectively arranged at the arc position of the corresponding bending place, and are connected with the steel bars on the side of the arc position;

The integrally formed frame member can be divided into a multi-segment triangular-like space structure, and the three sides of the triangular-like space structure are respectively the first section, the second section and the third section, where the first section and the second section are located. The plane is perpendicular to the length direction of the upper chord reinforcement and/or the lower chord reinforcement.

Another object of the embodiments of the present invention is to provide a superimposed floor slab, wherein the superimposed floor slab comprises: the reinforced truss structure as described above.

Another object of the embodiments of the present invention is to provide a construction method of a laminated floor slab, the method comprising the following steps:

Fabrication of reinforced truss structures;

Arranging a plurality of said steel bar truss structures at intervals in a specified mold;

Laying reinforcement mesh, wherein the tensile reinforcement of the reinforcement mesh laid along the length direction perpendicular to the upper chord reinforcement or the lower chord reinforcement is overlapped on the lower chord reinforcement, and is connected and fixed with the lower chord reinforcement;

Concrete is poured into the mould and cured to form.

The steel bar truss structure provided by the embodiment of the present invention has the following advantages compared with the mainstream triangular steel bar truss in the current market:

(1) The reinforced truss structure has clear force transmission, reasonable structure, and can be integrally formed. Compared with the triangular reinforced truss, the amount of reinforcement is greatly reduced; when designing the superimposed floor structure, the upper and lower chord reinforcement of the truss can be regarded as permanent design conditions respectively. Compared with the current triangular steel truss, the tension and compression steel bars of the bottom floor can reduce the amount of steel bars by about 40%-50%.

(2) The production of steel bar truss blanking can be automated, standardized, fully industrialized and prefabricated, with low energy consumption and high construction efficiency.

The production line of steel bar truss structure can adopt computer control technology, automatic steel bar bending machine automatically determines the length, integrated continuous bending, realizes fully automatic bending production and forming, no manual operation is required, and the production time of steel bar truss bars can be shortened by 60%-80% . Compared with the current triangular reinforced truss under the same conditions, the production of reinforced truss consumes less energy.

(3) The integrally formed frame parts are integrally formed by a steel bar, the welding process of the steel bar is reduced by 70%-80%, and the quality stability is good.

(4) Reduce the difficulty of positioning and laying the reinforcement mesh of the prefabricated bottom plate of the laminated board, and improve the processing speed of the prefabricated bottom plate.

(5) Compared with the current triangular reinforced truss composite bottom plate, the comprehensive cost is reduced by 20%-30%.

Description of drawings

1 is a schematic structural diagram of a steel bar truss structure according to an embodiment of the present invention;

2 is a front view of a steel bar truss structure according to an embodiment of the present invention;

3 is a side view of a steel bar truss structure according to an embodiment of the present invention;

4 is a schematic structural diagram of an integrally formed frame member provided by an embodiment of the present invention;

5 is a front view of an integrally formed frame member provided by an embodiment of the present invention;

6 is a side view of an integrally formed frame member provided by an embodiment of the present invention;

Fig. 7 is the enlarged view of A place in Fig. 6;

8 is a partial enlarged view of the integrally formed frame member in the embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a laminated floor slab according to an embodiment of the present invention;

FIG. 10 is a top view of a laminated floor bottom plate according to an embodiment of the present invention;

FIG. 11 is a schematic connection diagram of a steel bar truss structure according to an embodiment of the present invention;

12 is a schematic diagram of stacking of an integrally formed frame member provided by an embodiment of the present invention;

13 is a schematic diagram of a construction process of a laminated floor slab provided in an embodiment of the present invention;

14 is a schematic diagram of a manufacturing process of the first steel reinforced truss structure provided by an embodiment of the present invention;

15 is a schematic diagram of a manufacturing process of a second type of steel bar truss structure provided by an embodiment of the present invention;

FIG. 16 is a schematic diagram of a manufacturing process of a third steel truss structure provided by an embodiment of the present invention.

In the accompanying drawings: 10-integrated frame member; 11-first section; 12-second section; 13-third section; 14-arc; 20-top chord steel bar; 30-bottom chord steel bar; 41- the first tension bar; 42- the second tension bar.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

As shown in FIG. 1 , which is a structural diagram of a steel bar truss structure provided by an embodiment of the present invention, the steel bar truss structure includes an upper chord steel bar 20 , a lower chord steel bar 30 and an integrally formed frame member 10 , one of the upper chord steel bar 20 and Two of the lower chord bars 30 are arranged in an array; the integrally formed frame member 10 is sleeved on the periphery of the upper chord steel bar 20 and the lower chord steel bar 30; The upper chord bar 20 and the lower chord bar 30 are respectively arranged at the arc 14 position at the corresponding bend, and are connected with the bars on the side of the arc 14 position.

In this embodiment, the steel bar truss structure includes the upper chord steel bar 20 , the lower chord steel bar 30 and the integrally formed frame member 10 . The integrally formed frame member 10 can be produced automatically and quickly, and the lower chord steel bar 30 can also be set while the integrally formed frame member 10 is produced. , and the upper chord steel bar 20; while the traditional triangular steel bar truss has a complex structure and manufacturing process, and there are many processes. Generally, the truss web bars on both sides of the steel truss structure are processed first, and then the truss web bars on both sides are welded to the truss upper chord and upper chord steel bars respectively. , After the processing is completed, the triangular steel bar truss is placed in the specified position of the template; automatic processing cannot be fully realized, and the production efficiency and degree of industrialization are low. In this way, compared with the traditional triangular steel bar truss, the steel bar truss structure in this embodiment achieves some or all of the following effects:

(1) The principle of triangular stability is used in the structure. The reinforced truss structure has a clear force transmission and a reasonable structure. The truss and the ribs (upper and lower chord reinforcement) can be integrally formed. Compared with the triangular reinforced truss, the amount of reinforcement is greatly reduced; the laminated floor structure When designing, the upper and lower chord steel bars of the truss can be used as the tensile and compression steel bars of the bottom plate under the permanent design condition respectively. Compared with the current triangular steel bar truss, the amount of steel bars can be reduced by about 40%-50%;

(2) Automation and standardization can be realized during blanking production, fully industrialized prefabrication, low energy consumption, and high construction efficiency; that is, the truss bar production line can adopt computer control technology to realize fully automatic bending production and forming (automatic steel bar bending machine automatic Fixed length, integrated continuous bending), without manual operation, the production time of steel bar truss bars can be shortened by 60%-80%; compared with the current triangular steel bar truss under the same conditions, the production of steel bar trusses consumes less energy and is easy to stack;

(3) The integrated truss steel bar is integrally formed by a single steel bar, the welding process of the steel bar truss is reduced by 70%-80%, and the quality stability is good;

(4) In actual construction, compared with the current triangular truss reinforcement, the comprehensive cost can be reduced by about 20%-30%.

In a scene of this embodiment, the one-piece frame member 10 formed by helical bending of steel bars in a triangular-like manner, the projection of the cross-section in the length direction is a triangle, as shown in FIG. 2; The steel bar truss structure includes upper chord bars 20, lower chord bars 30 and an integrally formed frame member 10, one of the upper chord bars 20 and two of the lower chords. The reinforcement bars 30 are arranged in an arrangement; the upper chord reinforcement bars 20 are also commonly referred to as upper chord rods, and the upper chord reinforcement bars 20 can be rebars, round bars or other specifications; Rebar 30 can be made of threaded steel, or round steel or other specifications of steel; specific steel selection, optional: CPB550, HRB400, HRB500, CRB550 or CRB600H steel, involving the performance of steel raw materials, inspection requirements and dimensional deviations, etc. It complies with the relevant regulations and design requirements of the current industry standard "Reinforced Concrete Steel Truss" YB/T4262 and "Technical Specifications for the Application of Reinforced Steel for Concrete Structures"; this embodiment does not impose specific restrictions.

In a scenario of this embodiment, the integrally formed frame member 10 is sleeved on the periphery of the upper chord steel bar 20 and the lower chord steel bar 30; The three bends of the integrally formed frame member 10 are shown in FIG. 2 ; in practical application, the integrally formed frame member 10 can be processed first, and then the lower chord steel bars 30 are arranged at the lower two bends of the integrally formed frame member 10 , and welded or tied to fix it, or the upper chord steel bar 20 is also arranged at the upper bend of the integrally formed frame piece 10, and welded or tied to be fixed, and then stacked for use in subsequent construction, as shown in Figure 1-Figure 3; or, after processing the integrally formed frame piece 10, stack it (as shown in Figure 12) for use in the prefabrication of the laminated board; during the prefabrication of the baseplate of the laminated board, set the lower chord reinforcement 30 on the integrally formed frame The lower two bends in the frame member 10 are welded or tied together for fixation. After the prefabricated bottom reinforcement mesh is laid, the upper chord steel bars 20 are arranged at the upper bends of the integrally formed frame member 10, and welded or tied to connect. After fixing, and completing other supporting processes, pouring construction, and curing and forming.

In a scene of this embodiment, as shown in FIGS. 4 to 8 , the integrally formed frame member is formed by helical bending of steel bars in a triangular-like manner, and arc transitions are formed at the bends; for the bending of steel bars, You can refer to the relevant national regulations such as the current industry standard "Construction Machinery and Equipment Reinforcement Bending Machine" JB/T 12076, "Construction Machinery and Equipment Reinforcement Hoop Bending Machine" JB/T12079 and other relevant national regulations, flexibly choose equipment to achieve production and processing; in an optional In the scene, you can also refer to an automatic serpentine spring production equipment, in which the automatic feeding is similar to the feeding step of the steel bar production in this embodiment, and it is only necessary to replace the cutting machine with a bending machine, which is easy for those skilled in the art. Improvements can be made directly or through simple reasoning.

In one scenario of this embodiment, the three sides of a single segment of the integrally formed frame member 10 have a certain helix angle (not shown in the figure), or the planes of the two sides are perpendicular to the length of the integrally formed frame member 10 . direction (see FIG. 7 ); the remaining side has a certain helix angle; among the three sides of a single segment of the integrally formed frame member 10 , the bottom edge is used as a bottom rib, and the side edge is used as a belly rib, this embodiment is not limited to this.

In a scenario of this embodiment, the upper chord reinforcing bars 20 and the lower chord reinforcing bars 30 are respectively disposed at the positions of the arc 14 at the corresponding bend, and are connected to the reinforcing bars on the side of the arc 14 .

In the application of one embodiment, the inner diameter of the circular arc of the bending angle of the steel bar can be recorded as D, D is not less than 4d, and d is the diameter of the steel bar which is the material of the integrally formed frame member. When producing the integrally formed frame piece 10, the raw material, that is, the cutting length of the steel bar can be determined according to: the length of the straight section of the steel bar plus the straight length of the inclined section plus the length of the center line of the bending section, that is, the length of the three sides of the triangular-like space structure plus the arc section The length of the center line; the details will not be described in detail.

In one embodiment, the integrally formed frame member 10 can be divided into a multi-segment triangular-like space structure, and the three sides of the triangular-like space structure are a first section 11, a second section 12 and a third section 13 respectively, The plane where the first section 11 and the second section 12 are located is perpendicular to the length direction of the upper chord reinforcement 20 and/or the lower chord reinforcement 30, and the length direction of the third section 13 is perpendicular to the first section 11 and the length direction of the lower chord reinforcement 30. There is an included angle between the planes where the second section 12 is located.

In a scenario of this embodiment, the dimensions of the first section 11 and the second section 12 are usually the same, so the angle between the first section 11 and the second section 12 may be denoted as α (see FIG. 2 ) , and denote the included angle between the length direction of the third section 13 and the plane where the first section 11 and the second section 12 are located as β, there are:

β=(180°-α)/2,

Among them, α can be taken as (30°, 75°), which can be determined according to the current industry standard "Reinforced Truss for Reinforced Concrete" YB/T 4262.

In one embodiment, the included angle between the first section 11 or the second section 12 and the plane where the two bottom chord bars 30 are located is 30° to 90°.

In a scene of this embodiment, the included angle between the first section 11 or the second section 12 and the plane where the two bottom chord bars 30 are located may be 30°;

In a scenario of this embodiment, the included angle between the first section 11 or the second section 12 and the plane where the two bottom chord bars 30 are located may be 45°;

In a scenario of this embodiment, the included angle between the first section 11 or the second section 12 and the plane where the two bottom chord bars 30 are located may be 75°;

In a scenario of this embodiment, the lengths of the first section and the second section are the same;

At this time, the force transmission of the first section and the second section is clear. After the first section and the second section are constructed to form a composite floor slab structure, the support for the overall composite floor slab is the same. and is symmetrical.

In a scenario of this embodiment, the included angle between the first section 11 or the second section 12 and the plane where the two bottom chord bars 30 are located may be 90°.

In one embodiment, the included angle between the first section 11 or the second section 12 and the plane where the two bottom chord bars 30 are located is 35° to 65°.

In a scene of this embodiment, the included angle between the first section 11 or the second section 12 and the plane where the two bottom chord bars 30 are located may be 35°;

In a scenario of this embodiment, the included angle between the first section 11 or the second section 12 and the plane where the two lower chord bars 30 are located may be 65°;

In a scenario of this embodiment, the included angle between the first section 11 or the second section 12 and the plane where the two bottom chord bars 30 are located may be 60°.

As mentioned above, the angle between the first section 11 or the second section 12 and the plane where the two bottom chord bars 30 are located is preferably 60°. At this time, the first section 11, the second section 12, The projection of the third section 13 forms an equilateral triangle, which has good stability; and the integrally formed frame member 10 also has good stability and is excellent in tensile and compressive properties.

In a scenario of this embodiment, the included angle between the first section and the plane where the two lower chord reinforcing bars are located is equal to the included angle between the second segment and the plane where the two lower chord reinforcing bars are located.

Above, when the angle between the plane where the first section 11 and the two lower chord bars 30 are located can be 60°; the angle between the second section 12 and the plane where the two lower chord bars 30 are The angle is also 60°; in addition, when the included angle between the first section 11 and the plane where the two lower chord bars 30 are located is 45°, the plane where the second segment 12 and the two lower chord bars 30 are located is 45°. The included angle between them is also 45°; and the included angle between the first section 11 and the second section 12 is 90°, of course, this embodiment is not limited to this.

In one embodiment, the upper chord steel bar 20 includes one steel bar or more than two steel bars connected end to end, and the lower chord steel bar 30 includes one steel bar or more than two steel bars connected end to end.

When the length of the upper chord steel bar 20 or the lower chord steel bar 30 is long, more than two steel bars can be spliced together; it is convenient to reduce the difficulty of hoisting the upper chord steel bar 20 or the lower chord steel bar 30 during the construction process, and the remaining steel bars in the construction can also be reasonably used. materials, reducing material costs.

In a scenario of this embodiment, one of the upper chord bars 20 and two of the lower chord bars 30 are arranged in an arrangement, specifically: one of the upper chord bars 20 and two of the lower chord bars 30 are arranged in parallel, and the upper chord bars 20 are arranged in parallel. The upper chord steel bar can be used, and the lower chord steel bar 30 can be the lower chord steel bar; the height of the upper chord steel bar from the plane where the two lower chord steel bars are located is h, generally 50mm-300mm, the first section 11 or the second section 12 (equivalent to truss web bars) along the steel bar The distance in the length direction of the truss structure is b, generally not more than 300mm, and the distance between two parallel lower chord steel bars is c, generally 30mm-120mm. The above specific dimensions are calculated and determined according to the long side dimensions of the superimposed base plate, the spacing of the steel bar trusses, and the type of steel bars required by the architectural design; they can be flexibly selected within the scope of the design standards.

As shown in FIG. 9 , in another embodiment, in order to facilitate the promotion of the reinforced truss structure and improve the usage scenarios and commercial value of the reinforced truss structure, a superimposed floor slab is provided, and the superimposed floor slab includes: steel bars Mesh 40, the reinforced truss structure as described above;

The reinforcing bar mesh 40 is formed by laying a plurality of tension bars in a mesh shape, wherein the tension bars laid along the length direction perpendicular to the upper chord bars 20 or the lower chord bars 30 are overlapped on the lower chord bars. 30, and is connected and fixed with the lower chord steel bar 30 by means of welding, clipping or binding connection.

In this embodiment, the tensile steel bars laid along the length direction perpendicular to the upper chord bars 20 or the lower chord bars 30 are used as the first tensile bars 41, and the tensile bars laid in the other direction are used as the second tensile bars Reinforcing bar 42; the reinforcing bar mesh 40 may be composed of a first tension bar 41 and a second tension bar 42, the first tension bar 41 is laid at intervals in the horizontal direction, and the first tension bar 41 overlaps On the upper surface of the lower chord steel bars; the second tension steel bars 42 are laid at intervals in the vertical direction, and the second tension steel bars 42 are overlapped on the upper surface of the first tension steel bars 41 , as shown in FIG. 10 .

In a scenario of this embodiment, the steel bar truss structure includes: upper chord steel bars 20, lower chord steel bars 30 and an integrally formed frame member 10, one upper chord steel bar 20 and two lower chord steel bars 30 are arranged in an array; The integrally formed frame member 10 is sleeved on the outer periphery of the upper chord steel bar 20 and the lower chord steel bar 30; the integrally formed frame member 10 is formed by the helical bending of the steel bar in a triangular-like manner, and a circular arc 14 transition is formed at the bend. ; The upper chord reinforcing bar 20 and the lower chord reinforcing bar 30 are respectively arranged at the arc 14 position at the corresponding bend, and are connected with the reinforcing bars on the side of the arc 14 position.

As mentioned above, due to the steel truss structure used in the superimposed floor slab, the problems such as the large amount of steel bars and the large hoisting load of the currently commonly used triangular steel truss truss are solved.

As shown in FIG. 13 , in order to facilitate the promotion of the reinforced truss structure, in another embodiment, a construction method of the above-mentioned superimposed floor slab is provided, and the method includes the following steps S111 to S114:

S111, making a reinforced truss structure;

S112, setting a plurality of the steel bar truss structures at intervals in a specified mold;

S113, laying steel mesh sheets 40, wherein the tension bars of the steel mesh sheets 40 laid along the length direction perpendicular to the upper chord steel bars 20 or the lower chord steel bars 30 are overlapped on the lower chord steel bars 30, and are connected with the lower chord steel bars 30. The bottom chord steel bar 30 is connected and fixed;

S114, pouring concrete into the mold, and curing and forming.

In this embodiment, the reinforced truss structure can be manufactured in advance in the prefabricated parts factory, and the construction process can be moved forward, which can help to optimize the construction process and improve the production efficiency; the integrally formed frame parts 10 provided therein can be fully automatic once It is formed by bending a steel bar, and, during or after the bending (when the superimposed floor is poured), the upper chord reinforcement 20 and/or the lower chord reinforcement 30 can be arranged in the integrally formed frame member 10, that is, the abdominal reinforcement and the lower chord reinforcement 30. The bottom bar solves the problems of the currently commonly used triangular steel bar truss, which has a large amount of steel bars, a large hoisting load, and the production of steel bar trusses cannot realize fully automated steel bar processing, low production efficiency and industrialization, and high comprehensive cost.

In a scenario of this embodiment, the designated mold refers to a laminated floor slab mold, which is generally constructed at a construction site; the connection between the tension steel bar and the lower chord steel bar 30 can be fixed by welding, or it can be The binding method is adopted, and the binding connection is made of steel wire, or composite fiber and other materials that are not easy to rust.

In one embodiment, as shown in FIG. 14 , the manufacturing steps of the reinforced truss structure specifically include:

S121, a steel bar is integrally bent in a triangular-like spiral to form an integrally formed frame member 10, and an arc transition is formed at the bend; in this way, a plurality of integrally formed frame members 10 can be stacked and stacked to reduce stacking difficulty and reduce Take up space (see Figure 12).

S122 , one upper chord steel bar 20 and two lower chord steel bars 30 are respectively arranged on the arc 14 at the corresponding bending position in the integrally formed frame member 10 , and welded and fixed after correcting and positioning.

In this embodiment, the welding and fixing after calibrating and positioning refers to calibrating the position of the upper chord steel bar 20 so that it is in the arc position passing through the bend of the first section and the second section. After the position, the upper chord steel bar 20 is welded and fixed by welding equipment; or, the position of the lower chord steel bar 30 is corrected so that it is in the arc position passing through the bend of the first section or the second section and the third section. After being in the arc position, the lower chord steel bar 30 is welded and fixed by welding equipment.

In a scenario of the present embodiment, as shown in FIG. 15 , the steps of manufacturing the steel bar truss structure specifically include:

S132, a steel bar is spirally bent in a triangular-like manner to form the integrally formed frame member 10, and the arc 14 transition is formed at the bending place. The arc 14 position at the bend;

S134 , after laying the steel mesh, place a top chord steel bar 20 at the position of the arc 14 at the corresponding bend in the integrally formed frame member 10 , and then fix it by welding after correcting and positioning.

Figure 11 shows the processed steel bar truss structure in this embodiment. The bottom chord steel bar 30 and the integrally formed frame member 10 are integrally processed and formed, which can simplify subsequent construction procedures and improve construction efficiency.

In a scenario of this embodiment, as shown in FIG. 16 , the steps of manufacturing the reinforced truss structure specifically include:

S141, a steel bar is spirally bent in a triangular-like manner to form an integrally formed frame member 10, and an arc 14 transition is formed at the bend;

S142, when laying the steel mesh, simultaneously dispose the two lower chord steel bars 30 at the positions of the arcs 14 at the corresponding bends in the integrally formed frame member 10;

S143, set a top chord steel bar 20 at the position of the arc 14 at the corresponding bend in the integrally formed frame member 10, and fix it by welding after correcting and positioning.

As mentioned above, in the application scenarios of the various embodiments, several convenient manufacturing methods of the steel truss structure are provided. The first type has the highest degree of mechanization, the second type is more flexible in application, and the third type is more convenient for storage and transportation. The selection of its own site environment and characteristics of steel bar processing equipment is helpful for improving the construction progress, efficiency and quality of laminated floor slabs, and is worthy of promotion and application; this embodiment includes but is not limited to the above-mentioned embodiments.

In one embodiment, the top surface of the concrete after curing and forming is lower than the top of the reinforced truss structure, or the bottom of the upper chord steel bar 20 in the reinforced truss structure is higher than the top surface of the concrete.

In this embodiment, when the concrete is poured, the top surface of the formed concrete is lower than the top of the reinforced truss structure, that is, the bottom of the upper chord bars 20 of the reinforced truss structure is higher than the top surface of the concrete. After the integrally formed frame member 10, the lower chord steel bar 30 and the steel mesh sheet 40 in the reinforced truss structure are made in the prefabrication factory and bound into an integral structure, the mold is built and then poured this part of the concrete, which can reduce the amount of concrete poured on the construction site; All the concrete is poured in the prefabrication factory, and the part of the upper chord steel bar 20 in the reinforced truss structure is exposed on the top surface of the concrete, because at the construction site, it is also necessary to bind the transverse steel bars on the top of the reinforced truss structure.

The above-mentioned embodiments of the present invention provide a reinforced truss structure, and based on the reinforced truss structure, a superimposed floor slab and a construction method thereof are provided. It can be automatically formed at one time, and it is made by bending a steel bar, and during or after bending, the upper and lower chord steel bars can be set in the integrally formed frame parts, which solves the problem of the triangular steel bar truss commonly used at present. The amount of steel bars used is large, the hoisting load is large, the production of steel trusses cannot achieve fully automated steel bar processing, the production efficiency and industrialization are low, and the comprehensive cost is high.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. A steel bar truss structure, characterized in that the steel bar truss structure comprises an upper chord steel bar, a lower chord steel bar and an integrally formed frame piece, and the integrally formed frame piece is sleeved on the periphery of the upper chord steel bar and the lower chord steel bar; The integrally formed frame piece is formed by integrally bending steel bars in a triangular-like spiral, and an arc transition is formed at the bend; One of the upper chord steel bars and the two described lower chord steel bars are respectively arranged at the arc position of the corresponding bending place, and are connected with the steel bars on the side of the arc position; The integrally formed frame member can be divided into a multi-segment triangular-like space structure, and the three sides of the triangular-like space structure are respectively the first section, the second section and the third section, where the first section and the second section are located. The plane is perpendicular to the length direction of the upper chord reinforcement and/or the lower chord reinforcement. 2 . The steel bar truss structure of claim 1 , wherein the length of the first section and the second section are the same. 3 . 3. The reinforced truss structure according to claim 1, wherein the length direction of the third section and the plane where the first section and the second section are located have an included angle, and the included angle is 30° to 90°. 4 . The steel bar truss structure according to claim 3 , wherein the included angle between the first section or the second section and the plane where the two lower chord steel bars are located is 35° to 65°. 5 . 5 . The steel bar truss structure according to claim 4 , wherein the included angle between the first section or the second section and the plane where the two lower chord steel bars are located is 60°. 6 . 6 . The steel bar truss structure according to claim 1 , wherein the included angle between the first section and the plane where the two lower chord steel bars are located is equal to the angle between the second section and the plane where the two lower chord steel bars are located. 7 . angle. 7. A composite floor slab, characterized in that, the composite floor slab comprises: the reinforced truss structure according to any one of claims 1-6. 8. A construction method of a superimposed floor slab as claimed in claim 7, wherein the method comprises the following steps: Fabrication of reinforced truss structures; Arranging a plurality of said steel bar truss structures at intervals in a specified mold; Laying reinforcement mesh, wherein the tensile reinforcement of the reinforcement mesh laid along the length direction perpendicular to the upper chord reinforcement or the lower chord reinforcement is overlapped on the lower chord reinforcement, and is connected and fixed with the lower chord reinforcement; Concrete is poured into the mould and cured to form. 9. The construction method of the laminated floor slab according to claim 8, wherein the manufacturing step of the reinforced truss structure comprises: A steel bar is integrally bent in a triangular-like spiral to form an integrally formed frame piece, and one upper chord steel bar and two lower chord steel bars are respectively arranged in the arc position of the corresponding bending place in the integrally formed frame piece, and then welded after correcting and positioning. fixed; Alternatively, a steel bar is spirally bent in a triangular-like shape to form an integrally formed frame member, and at the same time, two lower chord steel bars are respectively arranged in the arc positions of the corresponding bending positions in the integrally formed frame member. , set a top chord steel bar at the arc position of the corresponding bend in the integrally formed frame piece, and fix it by welding after correcting and positioning; Alternatively, a steel bar is spirally bent in a triangular-like shape to form an integrally formed frame member, and when laying the steel mesh, two lower chord steel bars are respectively arranged at the arc positions of the corresponding bends in the integrally formed frame member, Afterwards, a top chord steel bar is set at the arc position of the corresponding bending position in the integrally formed frame member, and then fixed by welding after correcting and positioning. 10. The construction method of a laminated floor slab according to claim 8, wherein the top surface of the cured concrete is lower than the top of the reinforced truss structure, or the bottom of the upper chord reinforcement in the reinforced truss structure is higher than the bottom. on top of the concrete.

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