Construction method of reinforced truss concrete floor slab supported by reinforced concrete beam or wall

Abstract

The invention discloses a construction method of a steel bar truss concrete floor slab supported by a reinforced concrete beam or a wall, the steel bar truss concrete floor slab is arranged on a concrete structure and comprises a floor support plate, a cast-in-place structure, a connecting steel bar and a vertical steel bar, the floor support plate is arranged in the length direction of the floor slab and is parallel to a cross beam in the length direction; and the ratio of the long side span to the short side span of the steel bar truss concrete floor slab is not less than 1.5. The floor bearing plates are arranged in the length direction of the floor slab, the number of the floor bearing plates is effectively reduced, the size is larger, and the integrity and stability of a cast-in-place structure are better through the floor bearing plates with the smaller number; the floor support plate is arranged in the length direction of the floor slab, the bending moment in the long side direction is much smaller than the bending moment in the short side direction, the length direction stress requirement can be met by adopting the diameter of the upper chord steel bar and the lower chord steel bar of the floor support plate of 6-8 mm, the steel consumption of the floor support plate is greatly reduced, normalization of the upper chord steel bar and the lower chord steel bar of the floor support plate is facilitated, and therefore the manufacturing cost of the floor support plate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building structure and building construction, and in particular to a construction method of a reinforced concrete truss concrete floor supported by reinforced concrete beams or walls. Background Art

[0002] With the development of building industrialization, the research and development and application of prefabricated floor slabs is a very important topic. As a new type of prefabricated floor slab, the construction process of the reinforced truss concrete floor slab is to use the reinforced truss floor slab as a template, tie a small amount of auxiliary steel bars on site, and then pour concrete to form an integral floor slab. The reinforced truss floor slab is a reinforced truss composed of longitudinal steel bars and web steel bars, which is then combined with the bottom formwork to bear all construction loads during the construction stage.

[0003] Steel truss floor decking has been widely used in steel structures and is an industrial product with relatively mature technology. When used in steel structures, steel truss floor decking is directly erected on the steel beam. The overall length of the floor decking can reach 6 to 12 meters, and a continuous floor decking of 2 to 3 spans is used without disconnection in the middle, so it is very convenient to process and install on site; in addition, the steel truss floor decking is arranged along the short span direction of the floor slab, and the upper and lower chord longitudinal steel bars of the steel truss are the main load-bearing steel bars of the floor slab, and the force is also more reasonable; the steel truss made of the main load-bearing steel bars of the floor slab has high rigidity and can achieve an unsupported span of 2.5 to 5 meters, so that it can be free of support and formwork, and the construction is fast, labor-saving, and the construction cost is very low; compared with traditional corrugated steel plates, steel truss floor decking has better fire resistance and good force performance.

[0004] In order to meet the requirements of the development of prefabricated buildings, steel truss floor decking is gradually adopted in reinforced concrete structures. At present, the layout of steel truss floor decking in reinforced concrete structures is the same as that of steel structures, and they are arranged along the short side of the floor slab. However, in reinforced concrete structures, since the concrete wall has vertical and horizontal steel bars, and the concrete beam has stirrups and upper longitudinal steel bars, the steel truss has to be disconnected at the concrete wall or beam. During on-site construction, additional steel bars need to be added at the support to overlap and form a whole. In addition, since the short span of the floor slab is generally not long, the conventional short span of the floor slab is about 2.5 to 4 meters. This means that the length of the steel truss floor decking can only be processed into the long span of the floor slab, resulting in the overall length of the steel truss floor decking being short and of varying lengths, resulting in a large number of overlapping steel bars at the support, which not only makes the construction cumbersome, but also has the disadvantages of material waste and high cost. Summary of the invention

[0005] In view of the technical problems existing in the prior art, the present invention provides a construction method for a reinforced concrete truss floor supported by reinforced concrete beams or walls, so as to solve the technical problems of large steel bar consumption and high construction cost of the existing reinforced concrete truss floor supported by reinforced concrete beams or walls, and to solve the technical problems of multiple specifications, short length, difficult processing and complex on-site construction of the reinforced concrete truss floor decking in such floors.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: A construction method for a reinforced concrete truss concrete floor supported by reinforced concrete beams or walls comprises the following steps: S1, arranging supports and floor decking: temporary supports are arranged at intervals between the concrete structures, the floor decking is set on the concrete structure along the length direction of the floor slab, and the floor decking is supported by the temporary supports; S2, laying connecting steel bars: laying connecting steel bars between the floor decking plates along the length direction of the floor slab, connecting the connecting steel bars to connect the adjacent floor decking plates in the length direction, and connecting the connecting steel bars to the floor decking plates and the cross beams; S3, laying vertical steel bars: vertical steel bars are laid on the floor deck along the short direction of the floor slab. The vertical steel bars connect the adjacent floor decks in the short direction and connect the vertical steel bars with the floor deck and the beams: S4, pouring concrete: tie up additional steel bars, and then pour concrete on the floor decking. After the concrete solidifies, a cast-in-place structure is formed. The cast-in-place structure and the floor decking form a reinforced concrete truss floor. Remove the temporary support and complete the construction.

[0007] Furthermore, the concrete structure includes columns and beams, the beams are arranged on the columns, and the beams include long beams and short beams; the floor decking is arranged along the long direction of the floor slab, parallel to the long beams, and the ratio of the long side span to the short side span of the reinforced concrete truss floor slab is not less than 1.5; the ends of the floor decking are arranged on the short beams.

[0008] Furthermore, one end of the connecting steel bar is arranged at the end of the floor deck, and the other end passes through the short-direction cross beam and is connected to the adjacent floor deck. The vertical steel bar and the connecting steel bar are perpendicular to each other. The vertical steel bar is arranged throughout the length and passes through the long-direction cross beam and the floor deck.

[0009] Furthermore, the floor decking includes a bottom plate, an upper chord steel bar, a lower chord steel bar and a web bar; the connecting steel bar includes an upper connecting steel bar and a lower connecting steel bar, the upper connecting steel bar is arranged in parallel on the upper chord steel bar, and the lower connecting steel bar is arranged in parallel on the lower chord steel bar; the vertical steel bar includes an upper vertical steel bar and a lower vertical steel bar, the upper vertical steel bar is arranged vertically above the upper chord steel bar, and the lower vertical steel bar is arranged vertically below the lower chord steel bar.

[0010] Furthermore, the diameters of the upper chord steel bars and the lower chord steel bars are 6-8 mm, and the diameter of the web bar steel bars is 3.5-5 mm.

[0011] Furthermore, the cast-in-place structure is filled on the floor decking, and the combined thickness of the floor decking and the cast-in-place structure is 100-200 mm.

[0012] Furthermore, the concrete structure also includes a concrete wall, the floor decking plate is arranged on the concrete wall along the longitudinal direction of the floor slab, and the connecting steel bars and vertical steel bars all pass through the skeleton of the concrete wall.

[0013] The beneficial effects of the present invention are as follows: The floor decking is arranged along the long direction of the floor slab, so that the length of the floor decking is longer and the specifications and dimensions are more uniform. Compared with the short direction arrangement, the number of floor decking plates is effectively reduced. The longer size and fewer number of floor decking plates make the integrity and stability of the reinforced concrete structure better; When setting along the short direction of the floor slab, the connecting steel bars need to use full-length steel bars with larger diameters. When the floor deck is set along the long direction of the floor slab, the connecting steel bars and vertical steel bars are selected according to the force requirements. The amount of steel bars used is the same as that of the cast-in-place concrete floor slab. Compared with the setting along the short direction of the floor slab, the amount of steel used per square meter is saved by 3-10kg, which effectively saves the amount of steel bars, thereby improving the economy of the floor slab. After the floor deck is set along the length of the floor slab, since the bending moment in the long side direction of the floor slab is much smaller than that in the short side direction, the diameter of the upper and lower chord steel bars of the steel truss of the floor deck can be 6-8mm to meet the longitudinal force requirements, which not only greatly reduces the steel consumption of the floor deck, but also makes the upper and lower chord steel bars of the floor deck unified and standardized, reducing the types of steel bar specifications, which is conducive to reducing the cost of the floor slab; The upper vertical reinforcement is set above the upper chord reinforcement, which reduces the workload of threading reinforcement by more than half, thereby improving construction efficiency. In addition, when setting up multiple spans continuously, the vertical reinforcement can be set throughout the entire length, avoiding truncation at the support, which not only improves construction efficiency but also improves economy. The base material of the floor deck is steel plate, aluminum plate, bamboo plywood, fine stone concrete plate or other plates, which can be flexibly selected according to the building structure and construction conditions; The present invention is not only applicable to the frame structure of cast-in-place concrete beams or precast concrete beams, but also to the shear wall structure of cast-in-place concrete walls or precast concrete walls. It can be used in buildings such as office buildings, shopping malls, and residential buildings, and has a wide range of applications and good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view schematic diagram of the overall setting state of the present invention; Figure 2 It is a schematic diagram of the vertical steel bar connection structure of the present invention; Figure 3 It is a schematic diagram of the connecting steel bar structure of the present invention; Figure 4 This is a schematic diagram of the connection state of the present invention arranged on a concrete wall; Figure 5 It is a schematic diagram of the existing state setting along the short direction of the floor slab; Figure 6 This is a comparison table of steel bar usage in application example 1; Figure 7 This is the reinforcement diagram of the cast-in-place floor slab in Application Example 1; Figure 8 This is the reinforcement diagram of the floor slab arranged along the short direction of the floor slab in application example 1; Fig. 9 It is a reinforcement diagram of the floor slab arranged along the length direction of the floor slab in the first application example of the present invention; Fig.10 This is the steel bar usage table for the cast-in-place floor slab in Application Example 1; Fig.11 This is the steel bar usage table for the floor slab arranged along the short direction of the floor slab in application example 1; Fig.12 The steel bar usage table for arranging the floor slab along the length direction of the floor slab in the first application example of the present invention; Fig.13 This is the steel bar usage table for the floor slab arranged along the short direction of the floor slab in Application Example 2; Fig.14 This is a table of steel bar usage for arranging the floor slab along the length direction of the floor slab in Application Example 2 of the present invention.

[0015] Figure numerals: 1. Floor deck; 2. Cast-in-place structure; 3. Connecting steel bars; 31. Upper connecting steel bars; 32. Lower connecting steel bars; 4. Vertical steel bars; 41. Upper vertical steel bars; 42. Lower vertical steel bars; 5. Column; 6. Beam; 7. Concrete wall. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] like Figure 5 As shown, the floor decking 1 is widely used in building construction and the technology is relatively mature. Its structure includes a base plate, upper chord steel bars, lower chord steel bars and web steel bars. The upper chord steel bars, lower chord steel bars and web steel bars are first welded to form a steel truss, which is then connected to the base plate as a prefabricated building structure. During construction, the floor decking 1 is first set, and then concrete is poured to form a steel truss concrete floor slab; when the existing technology uses the floor decking 1 for design, the floor decking 1 is generally set along the short direction of the floor slab; the thickness of the steel truss concrete floor slab is determined according to the span and load of the floor slab, and then the reinforced cross-sectional area of ​​the steel truss concrete floor slab is calculated; then the floor decking 1 is selected according to the thickness of the steel truss concrete floor slab and the cross-sectional area of ​​the lower reinforcement in the short side direction. When the floor decking 1 is selected, the height of the steel truss is equal to the thickness of the floor slab minus the thickness of the floor slab concrete protective layer, and the cross-sectional areas of the upper and lower chord steel bars should not be less than the cross-sectional area required for the support span construction. When the existing technology uses the floor decking 1 for construction, first set up temporary supports beside the beams or walls, and lay the floor decking 1 along the short side direction; when the temporary support spacing is greater than the maximum applicable span during the floor decking construction stage, add temporary supports in the middle of the span to ensure stability; then set the lower connecting steel bars at the disconnection point of the steel truss, connect the steel truss into a whole, and then lay the upper connecting steel bars; when laying, the length extending from the support side into the board should cover the negative bending moment envelope diagram and meet the steel bar anchorage requirements, and should not be less than 1 / 4 of the calculated span, and then lay the additional steel bars at the bottom of the short side board, distributed steel bars, long side support steel bars and other steel bars, and finally pour concrete to complete the concrete floor construction.

[0019] In the prior art design, the upper chord steel bars and lower chord steel bars of the floor deck 1 are used as the main stress-bearing steel bars, and the connecting steel bars tied on site are used as secondary stress-bearing steel bars or distributed steel bars. When arranged along the short direction of the floor slab, the floor deck 1 has good rigidity and a full span of 2.5-5m. The temporary support spacing under the floor deck 1 can be set larger, which is beneficial to reducing the workload, and the amount of steel bars tied is small. The floor deck 1 is arranged along the short direction of the floor slab, and can cross the top of the steel beam in the steel beam frame. Therefore, a multi-span arrangement is appropriate. However, there are many problems in the concrete structure. First, the floor deck 1 must be disconnected from the concrete beam, and the short span of the floor slab is small, generally 2.6-4m. Therefore, the length of the floor deck 1 can only be less than the above size, which not only increases the workload, but also the more the number of floor decks 1, the worse the integrity of the reinforced truss concrete floor slab; second, it will lead to an increase in the overall steel consumption. Since the upper chord steel bars and lower chord steel bars of the floor deck 1 are used as the main force-bearing steel bars, in order to meet the construction requirements, it is necessary to select the upper chord steel bars and lower chord steel bars of the floor deck 1 according to the larger reinforcement, and unify the steel bar specifications. As a result, the upper chord steel bars and lower chord steel bars of the selected floor deck 1 are set according to the larger reinforcement. Therefore, when the floor deck 1 is arranged on the short side, the steel consumption is seriously increased; and the connecting steel bars and the upper chord steel bars and When the lower chord steel bars are connected, according to the requirements of the specifications, the lap length between the upper connecting steel bars and the upper chord steel bars is less than 1.6La and not less than 300mm, and the lap length between the lower connecting steel bars and the lower chord steel bars is less than 1.2La and not less than 300mm. After the diameters of the upper and lower chord steel bars are selected according to the maximum reinforcement, the increase in the lap length will also increase the amount of steel used; and since the lower connecting steel bars need to be of uniform specifications, the amount of steel used will also increase; according to the conventional values, the diameter of the upper chord steel bars is 12mm and the diameter of the lower chord steel bars is 10mm. Compared with the upper and lower chord steel bars with a diameter of 6-8mm, the amount of steel used has increased by 37.3% and 23.3% respectively, which not only makes it impossible to standardize the reinforcement, but also increases the workload and construction costs; third, the layout along the short direction of the floor slab requires more on-site reinforcement, and the upper and lower vertical steel bars need to be reinforced on-site for binding, and the construction efficiency is not high.

[0020] Embodiment 1, as Figure 1As shown, a reinforced concrete truss concrete floor supported by reinforced concrete beams or walls comprises a floor deck 1, a cast-in-place structure 2, connecting steel bars 3 and vertical steel bars 4. The reinforced concrete truss concrete floor is arranged on the concrete structure. The concrete structure comprises columns 5 and beams 6. The beams 6 are arranged on the columns 5. The beams 6 serve as supports for the floor deck 1. The beams 6 comprise long beams and short beams. The ratio of the span of the long beam to the span of the short beam is not less than 1.5. The floor deck 1 is along the floor deck. The cast-in-place structure 2 is filled on the floor decking slab 1 and is arranged parallel to the long-direction crossbeam. The ratio of the long-side span to the short-side span of the reinforced truss concrete floor slab is not less than 1.5. The end of the floor decking slab 1 is arranged on the short-direction crossbeam, and the side of the floor decking slab 1 located on the outside is arranged on the long-direction crossbeam. After the floor decking slab 1 is supported on the crossbeam 6, the adjacent floor decking slabs 1 are connected by connecting steel bars 3 and vertical steel bars 4 to form a multi-span continuous truss, and the floor decking slab 1 is connected to the crossbeam 6 as a whole.

[0021] like Figure 2 , 3 As shown, the connecting steel bar 3 is arranged at the break of the floor decking slab 1 and is arranged parallel to the floor decking slab 1. One end of the connecting steel bar 3 is arranged at the end of the floor decking slab 1, and the other end passes through the short-direction cross beam at the break and is connected to the adjacent floor decking slab 1; the vertical steel bar 4 is perpendicular to the connecting steel bar 3 and the floor decking slab 1. The vertical steel bar 4 is arranged throughout the length, passes through the adjacent floor decking slab 1 and the long-direction cross beam in the short direction and connects them.

[0022] like Figure 2 , 3 As shown, the connecting steel bars 3 include upper connecting steel bars 31 and lower connecting steel bars 32, the upper connecting steel bars 31 are arranged in parallel on the upper chord steel bars, and the lower connecting steel bars 32 are arranged in parallel on the lower chord steel bars; the vertical steel bars 4 include upper vertical steel bars 41 and lower vertical steel bars 42, the upper vertical steel bars 41 are arranged vertically above the upper chord steel bars, and the lower vertical steel bars 42 are arranged vertically below the lower chord steel bars.

[0023] When the long side span of the floor slab is greater than any short side span, and the ratio of the long side span to the short side span of the floor slab is not less than 1.5, in this case, after the floor decking 1 is arranged along the length of the floor slab, the main force-bearing steel bars are the upper vertical steel bars 41 and the lower vertical steel bars 42, the bending moment of the steel bars is higher, and the overall force-bearing performance of the floor slab is better, which is completely consistent with the cast-in-place floor slab. Under conventional floor live loads, the floor decking 1 is arranged along the length of the floor slab, and the diameters of the upper and lower chord steel bars are relatively small, and 6-8mm can meet the lengthwise force requirements of the floor slab, thereby reducing the steel bar selection specifications of the floor decking 1.

[0024] Under normal working conditions, the lower vertical steel bar 42 is located below the lower chord steel bar, and can also be located above the lower chord steel bar according to actual working conditions. Since the space between the upper chord steel bar and the lower chord steel bar is large, it is more convenient to thread the lower vertical steel bar 42. The lower vertical steel bar 42 should be anchored into the support when it is laid. If it is long, it can be set through the support. If the steel bar is short, it can also be disconnected in the support.

[0025] The upper vertical steel bar 41 is vertically arranged above the upper chord steel bar and can be directly placed on the floor decking slab 1 during layout. The construction is more convenient. It not only avoids the construction operation of threading the steel bar, but also uses the floor decking slab 1 as a construction stirrup to save processes and materials. The construction is more convenient. Compared with the existing technology, the workload of threading the steel bar is reduced by more than half, and the construction efficiency is greatly improved. At the same time, when the vertical steel bar is used as the main load-bearing steel bar, the length can be flexibly set according to the on-site conditions, avoiding the lower vertical steel bar 42 from being cut off at the support. At the same time, it can also save materials and workload, which is conducive to saving construction.

[0026] Furthermore, the upper vertical steel bars 41 are tied on site, and the selection and construction of reinforcement are more flexible. When the floor slab requires upper full-length steel bars, steel bars with smaller diameters such as 8 to 10 mm can be used as full-length steel bars. When the upper steel bar area at the support is insufficient, additional support stress-bearing steel bars can be added, and the length of the additional support stress-bearing steel bars extending out of the beam edge is only 1 / 4 or 1 / 3 of the slab span according to the stress requirements; when the floor slab does not require upper full-length steel bars, the support upper steel bars can be directly set; while the floor deck 1 of the prior art solution is arranged along the short side direction of the floor slab, the upper chord steel bars must use full-length steel bars with larger diameters, which are not superior in length and diameter, and use more steel.

[0027] Furthermore, the upper connecting steel bars 31 are arranged in parallel on the upper chord steel bars, and the lower connecting steel bars 32 are arranged in parallel on the lower chord steel bars. After selecting the upper chord steel bars and the lower chord steel bars of 6-8 mm, the upper connecting steel bars 31 and the lower connecting steel bars 32 can also use small diameter steel bars of 6-8 mm. Moreover, since the number of floor decking plates 1 is reduced, the number of upper connecting steel bars 31 and the lower connecting steel bars 32 is also reduced accordingly, so the construction is more convenient and more economical.

[0028] Furthermore, the diameter of the upper and lower chord steel bars is 6-8 mm, and the upper connecting steel bars 31 and the lower connecting steel bars 32 have the same specifications as the upper and lower chord steel bars, which are also 6-8 mm, which facilitates the unification of the specifications of construction materials and reduces the amount of steel used. The diameter of the web bar steel bars is 3.5-5 mm.

[0029] Furthermore, the bottom plate of the floor deck 1 is a steel plate, an aluminum alloy plate, a fiber cement plate, a bamboo plywood, a hollow plastic formwork, a fine stone concrete plate or an ultra-high performance concrete plate.

[0030] Furthermore, the combined thickness of the floor deck 1 and the cast-in-place structure 2 is 100-200 mm.

[0031] Furthermore, the cross beam 6 can be a prefabricated composite beam, the lower part of the cross beam 6 can be prefabricated, and the cross beam 6 can also be a completely cast-in-place concrete beam.

[0032] Furthermore, the first embodiment can be applied not only to concrete floor slabs but also to concrete roof slabs.

[0033] like Figure 6 , 10 As shown in Figures 11 and 12, a specific application example 1 of the present embodiment is a conventional 120mm thick floor slab with a span of 3.6 to 4.2m for offices and conference rooms. The floor decking 1 is arranged along the longitudinal direction of the floor slab, which saves 4.8kg of steel bars per square meter compared with the traditional steel truss floor slab, saving about 29.9%; the steel bars per square meter increased by only about 1.5kg and the steel bottom plate by about 4kg, totaling about 5.5kg compared with the cast-in-place floor slab, but the formwork and formwork removal can be avoided, the amount of steel bars used for tying can be reduced, labor can be saved, and the construction progress can be accelerated; while the prior art increases the steel bars per square meter by about 6.3kg and the steel bottom plate by about 4kg, totaling about 10.3kg compared with the cast-in-place floor slab, which has a large increase and poor economic benefits, affecting the promotion and application of floor decking.

[0034] like Figure 7 , 8 As shown in Figures 9, 10, 11 and 12, the calculation objects are 2 conference room floors of 4.2mx9.0m, 120mm thick, with a constant load of 1.5 kN / m2 and a live load of 3.0 kN / m2 on the boards; 2 office floors of 3.6mx9.0m, 120mm thick, with a constant load of 1.5 kN / m2 and a live load of 2.5 kN / m2 on the boards. C30 concrete is used, and HRB400 hot-rolled ribbed steel bars are used as steel bars. The final calculation results show that this embodiment reduces the amount of steel bars used by 4.8kg per square meter compared with the prior art. For a project of 100,000 square meters, the use of the present invention will save 480 tons of steel bars, and the effect is very significant.

[0035] like Fig.13 , 14 As shown, the specific application example 2 of this embodiment is a residential project. The calculation object is a living room floor with a plane of 4.1mx6m and a thickness of 130mm. The prior art arranges the floor decking 1 in the short direction, and a total of 14 TDD2-90 floor deckings with a length of 3800mm are selected. The steel bar consumption per square meter is 14.0kg. This embodiment arranges the floor decking 1 in the long direction, the number of floor deckings is 6, and the steel bar consumption per square meter is 10.9kg. The number of floor deckings is reduced from 14 to 6, a reduction of 57%; the steel bar consumption per square meter is reduced from 14kg to 10.9kg, a reduction of 3.1kg, and a saving of 22.1%.

[0036] Embodiment 2, a construction method of a reinforced concrete truss concrete floor supported by reinforced concrete beams or walls, comprising the following steps: S1, arranging supports and floor decking: temporary supports are arranged at intervals between concrete beams or walls, and the floor decking 1 is arranged on the concrete structure along the long direction of the floor slab, and the floor decking 1 is supported by the temporary supports; S2, laying connecting steel bars: laying connecting steel bars 3 between the floor decking plates 1 along the longitudinal direction of the floor slab, connecting steel bars 3 connecting adjacent floor decking plates 1 in the longitudinal direction, and connecting connecting steel bars 3 with the floor decking plates and the cross beams; S3, laying vertical steel bars: laying vertical steel bars 4 on the floor deck 1 along the short direction of the floor slab, connecting the adjacent floor deck 1 in the short direction, and connecting the vertical steel bars 4 with the floor deck 1 and the crossbeam: S4, pouring concrete: tie up additional steel bars, and then pour concrete on the floor deck 1. After the concrete solidifies, a cast-in-place structure 2 is formed. The cast-in-place structure 2 and the floor deck 1 form a reinforced concrete truss floor. The temporary support is removed to complete the construction.

[0037] Embodiment three, as Figure 4 As shown, the concrete structure also includes a concrete wall 7, a steel bar truss concrete floor slab is arranged on the concrete wall 7, and a floor slab 1 is arranged on the concrete wall 7 along the length of the floor slab. The connecting steel bars and vertical steel bars pass through the skeleton of the concrete wall 7 and connect the adjacent floor slabs 1. During construction, the vertical reinforcement and horizontal reinforcement of the wall are pre-tied. According to the construction conditions, the lower concrete of the concrete wall 7 can be cast in advance, and then the floor slab 1 is installed, and finally the cast-in-place structure 2 is cast; at this time, the wall has good stability and is suitable for concrete walls 7 with higher floor heights. The lower concrete of the concrete wall 7 can also be cast together with the cast-in-place structure 2, which has the advantages of fewer working procedures and faster speed, and is suitable for low-rise concrete residential buildings with cast-in-place walls.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

Claims

1. A construction method for a reinforced concrete truss concrete floor supported by reinforced concrete beams or walls, characterized in that: The following steps are involved: S1, arranging supports and floor decking plates: arranging temporary supports at intervals between the concrete structures, placing the floor decking plates (1) on the concrete structures along the lengthwise direction of the floor slabs, and supporting the floor decking plates (1) by means of the temporary supports; S2, laying connecting steel bars: laying connecting steel bars (3) between the floor decking plates (1) along the longitudinal direction of the floor slab, the connecting steel bars (3) connecting adjacent floor decking plates (1) in the longitudinal direction, and connecting the connecting steel bars (3) to the floor decking plates and the cross beams; S3, laying vertical steel bars: laying vertical steel bars (4) on the floor deck (1) along the short direction of the floor slab, the vertical steel bars (4) connecting adjacent floor decks (1) in the short direction, and connecting the vertical steel bars (4) to the floor deck (1) and the crossbeam: S4, pouring concrete: additional reinforcement is tied, and then concrete is poured on the floor deck (1). After the concrete solidifies, a cast-in-place structure (2) is formed. The cast-in-place structure (2) and the floor deck (1) form a reinforced concrete truss floor slab. The temporary support is removed to complete the construction.

2. The construction method of a reinforced concrete truss concrete floor supported by a reinforced concrete beam or wall according to claim 1, characterized in that: The concrete structure comprises a column (5) and a crossbeam (6), wherein the crossbeam (6) is arranged on the column (5), and the crossbeam (6) comprises a long crossbeam and a short crossbeam; the floor decking plate (1) is arranged along the long direction of the floor slab, parallel to the long crossbeam, and the ratio of the long side span to the short side span of the reinforced concrete truss floor slab is not less than 1.5; and the end of the floor decking plate (1) is arranged on the short crossbeam.

3. The construction method of a reinforced concrete truss concrete floor supported by a reinforced concrete beam or wall according to claim 2, characterized in that: One end of the connecting steel bar (3) is arranged at the end of the floor deck (1), and the other end passes through the short-direction cross beam and is connected to the adjacent floor deck (1); the vertical steel bar (4) and the connecting steel bar (3) are perpendicular to each other; the vertical steel bar (4) is arranged throughout the length and passes through the long-direction cross beam and the floor deck (1).

4. The construction method of a reinforced concrete truss concrete floor supported by a reinforced concrete beam or wall according to claim 2, characterized in that: The floor deck (1) comprises a bottom plate, an upper chord steel bar, a lower chord steel bar and a web bar steel bar; the connecting steel bar (3) comprises an upper connecting steel bar (31) and a lower connecting steel bar (32), the upper connecting steel bar (31) being arranged in parallel on the upper chord steel bar, and the lower connecting steel bar (32) being arranged in parallel on the lower chord steel bar; the vertical steel bar (4) comprises an upper vertical steel bar (41) and a lower vertical steel bar (42), the upper vertical steel bar (41) being arranged vertically above the upper chord steel bar, and the lower vertical steel bar (42) being arranged vertically below the lower chord steel bar.

5. The construction method of a reinforced concrete truss concrete floor supported by a reinforced concrete beam or wall according to claim 4, characterized in that: The diameters of the upper chord steel bars and the lower chord steel bars are 6-8 mm, and the diameter of the web bar steel bars is 3.5-5 mm.

6. The construction method of a reinforced concrete truss concrete floor supported by a reinforced concrete beam or wall according to claim 1, characterized in that: The cast-in-place structure (2) is filled on the floor decking (1), and the combined thickness of the floor decking (1) and the cast-in-place structure (2) is 100-200 mm.

7. The construction method of a reinforced concrete truss concrete floor supported by a reinforced concrete beam or wall according to claim 2, characterized in that: The concrete structure also includes a concrete wall (7), the floor slab (1) is arranged on the concrete wall (7) along the longitudinal direction of the floor slab, and the connecting steel bars (3) and the vertical steel bars (4) both pass through the skeleton of the concrete wall (7).

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