Steel bar truss and floor support plate combined pitched roof with prefabricated cornice

Abstract

The invention relates to the field of fabricated buildings, in particular to a steel bar truss floor support plate combined pitched roof with a prefabricated cornice, which comprises a steel bar truss floor support plate and the prefabricated cornice, the steel bar truss floor support plate is laid on a pitched roof truss formed by a steel frame system along a slope, and the overhung prefabricated cornice is arranged at the end of the steel bar truss floor support plate. The roof slope ridge is supported by the house spine column, the bottom of the house spine column is fixedly connected with the steel frame system, and the top of the house spine column is connected with the steel bar truss floor support plate through shear-resistant studs. According to the steel bar truss and floor support plate combined pitched roof with the prefabricated cornice, the plane arrangement of the steel beams of the pitched roof is optimized, the structural strengthening measures of the prefabricated cornice are determined, the laying direction of the steel bar truss and floor support plates and the arrangement direction of the shear-resistant studs are clear, the force transmission path is clear, and the overall shear resistance and bending resistance of a combined floor system are guaranteed.

Description

Technical Field

[0001] The invention relates to the field of prefabricated buildings, and in particular to a steel truss floor deck combined slope roof with prefabricated overhanging eaves. Background Art

[0002] Steel truss floor deck is suitable for the combined floor of industrial and civil buildings and structures. It can withstand a certain construction load of 1.5kN / m during the construction stage. 2 The steel truss floor slab can be used for one-way simply supported slabs, and can be used for one-way continuous slabs by adding negative reinforcement of the slab support. It can also be used for simply supported or continuous two-way slabs by adding slab bottom reinforcement and slab support negative reinforcement perpendicular to the steel truss.

[0003] When the prefabricated sloping roof adopts the steel truss floor decking combined with the floor slab, the existing national standard atlas does not have the corresponding roof ridge beam top connection structure, and the conventional practice is to simply splice two floor deckings. If the connection is improper, it is very easy to leak when pouring concrete; in the later use process, it is often a potential leakage point of the roof; in addition, the ridge is set with various shapes, and if the structure is not properly handled, it is very easy to cause safety hazards. On a roof with a large slope, the concrete is easy to flow to the bottom of the slope when pouring. Compared with the horizontally placed floor decking and steel beams, the steel truss floor decking and steel beams laid along the sloping roof have weaker collaborative performance. For the cantilevered eaves of the sloping roof with cantilevered eaves, the formwork is supported by setting up a support frame from the ground or a wall-mounted triangular steel support. The angle steel triangular support has a long erection period and requires secondary on-site welding. It is heavy, difficult to disassemble and assemble, and has low safety. Summary of the invention

[0004] In view of the problem of low safety due to unstable connection in the prior art, the present invention provides a steel truss floor deck composite slope roof with prefabricated cantilevered eaves.

[0005] The present invention is achieved through the following technical solutions: A reinforced truss floor decking composite slope roof with prefabricated cantilevered eaves comprises a reinforced truss floor decking and a prefabricated cantilevered eaves. The reinforced truss floor decking is laid along the slope on a sloped roof frame formed by a steel frame system. A cantilevered prefabricated cantilevered eaves are arranged at the end of the reinforced truss floor decking. The sloped ridge of the roof is supported by a ridge column. The bottom of the ridge column is fixedly connected to the steel frame system, and the top of the ridge column is connected to the reinforced truss floor decking by shear bolts.

[0006] Preferably, the steel frame system includes rigidly connected steel frame beams GKLa, GKLb, GKLc and hingedly connected steel secondary beams GL1; the steel frame beam GKLa is used as the top steel beam of the ridge, and the steel frame beam GKLb is used as the edge steel beam of the sloping roof, and the length axis of the steel frame beam GKLb is parallel to the length axis of GKLa; the steel frame beam GKLc is arranged on both sides of the steel frame beam GKLa along the slope to form a two-way slope; the steel secondary beam GL1 is hinged between the steel frame beams GKLc at a certain interval, and the steel secondary beam GL1 is parallel to the length axes of the steel frame beams GKLa and GKLb; the upper flanges of the steel frame beams and the steel secondary beams are fixedly connected to the lower surface of the steel truss floor decking by shear bolts.

[0007] Preferably, the roof ridge includes a two-way cover plate and a plurality of stiffening plates, the two-way cover plate is fixed to the top of the steel frame beam GKLa through the stiffening plate, the upper surface of the two-way cover plate is connected to the steel truss floor deck, and the plurality of stiffening plates are spaced apart on the lower surface of the two-way cover plate.

[0008] Preferably, the bidirectional cover plate is provided with support connecting steel bars, which are anchored into the steel truss floor deck and fixedly connected with the upper chord steel bars of the steel truss floor deck.

[0009] Preferably, the steel truss floor decking plate includes a plurality of single floor decking plates, and connecting angle steels and support connecting steel bars are arranged between adjacent floor decking plates and on the upper flange of the steel beam GL1, and the length axis of the connecting angle steel is parallel to the length axis of GL1; the connecting angle steel is welded and fixed to the upper flange of GL1, the support connecting steel bars at the bottom are welded and fixed to the connecting angle steel and the lower chord steel bars of the floor decking plate, and the support connecting steel bars at the top are welded and fixed to the upper chord steel bars of the floor decking plate.

[0010] Preferably, an inclined upper flange is provided on the top of the steel beam GL1, and the inclination angle of the inclined upper flange is consistent with the roof slope; structural shear bolts are provided between the steel truss floor deck and the inclined upper flange.

[0011] Preferably, the upper flange of the outermost steel frame beam GKLb is provided with a butt groove, and an auxiliary steel plate bottom formwork is fixed to the butt groove. The auxiliary steel plate bottom formwork is spot-welded and fixed to the outer stiffening ribs of the steel frame beam GKLb through temporary supporting ribs. The temporary supporting ribs are removed after the pouring and curing of the upper concrete of the prefabricated cantilever eaves is completed.

[0012] Preferably, a grid sheet containing main stress-bearing reinforcement is arranged between the auxiliary steel plate bottom formwork and the outermost steel frame beam GKLb, tension reinforcement is arranged on the diagonals of the grid sheet, and the main stress-bearing reinforcement grid sheet is welded on both sides to the upper flange of GKLb and the auxiliary steel plate bottom formwork. Preferably, inner stiffening ribs and outer stiffening ribs are symmetrically arranged on both sides of the web of the steel frame beam GKLb along the slope direction of the slope, and broken line-shaped reinforcement bars are arranged on the outer side of the inner stiffening ribs, which are used to connect the inner stiffening ribs, the upper chord steel bars of the floor deck and the main force bars.

[0013] Preferably, the reinforcing ribs include a first fold line portion and a second fold line portion which are fixedly connected, the first fold line portion being connected to the outer side of the inner stiffening rib, a portion of the second fold line portion being connected to the upper chord of the steel truss floor deck, and the other portion being connected to the main force-bearing ribs of the prefabricated eaves grid sheet.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a steel truss floor deck composite slope roof with prefabricated cantilevered eaves, optimizes the plane layout of the steel beams of the slope roof, determines the structural reinforcement measures of the prefabricated cantilevered eaves, clarifies the laying direction of the steel truss floor deck and the arrangement direction of the shear bolts, and has a clear force transmission path, thereby ensuring the overall shear and bending resistance of the composite floor.

[0015] Furthermore, a roof ridgepole including a bidirectional cover plate and a stiffening plate is provided, the beam top connection structure at the ridge of the sloping roof is clarified, and support connection steel bars are provided to enhance the crack resistance of the ridge concrete.

[0016] Furthermore, at the connection between adjacent floor decking plates, by setting a connecting angle steel that is consistent with the direction of the steel beam on the top of the sloping roof steel beam GL1, the sliding of the concrete along the slope due to its own weight can be effectively blocked; the support connecting steel bars are welded to the connecting angle steel and the upper and lower chord steel bars of the floor decking plates to strengthen the integrity of the connection between the floor decking plates, and work together with the steel beam GL1 to form a composite beam force mechanism.

[0017] Furthermore, by setting an inclined flange to fit the entire cross-section of the sloping roof steel truss floor deck, and using shear studs as shear keys, a reliable composite beam coordinated force mechanism is formed.

[0018] Furthermore, the auxiliary steel plate bottom formwork with the main force reinforcement grid sheet, the temporary support ribs and the steel frame beam GKLb are prefabricated and connected in the steel structure factory, reducing the welding on the construction site and ensuring the quality. After lifting and installation, the connection with the main force reinforcement grid sheet, the upper chord steel bars of the steel truss floor deck and the GKLb web is strengthened by setting the broken line reinforcement bars. The temporary support ribs can improve the stability of the prefabricated cantilever during the construction phase. There is no need to set up special formwork and temporary support on site, which shortens the cycle and is highly safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural plan view of a sloping roof with prefabricated overhanging eaves in the present invention.

[0020] Figure 2 It is a schematic diagram of the combined steel member of the roof ridge top and roof ridge column in the present invention.

[0021] Figure 3 It is a schematic diagram of the roof spine in the present invention.

[0022] Figure 4It is a schematic diagram of the connection of the upper flange of the steel beam GL1 at the disconnection point of the adjacent steel truss floor decking in the present invention.

[0023] Figure 5 It is a schematic diagram of the connection between the steel truss floor deck and the upper flange of the steel beam GL1 in the present invention.

[0024] Figure 6 It is a schematic diagram of the connection between the prefabricated cantilever eaves, steel beams and floor decking in the present invention.

[0025] Figure 7 It is a schematic diagram of the prefabricated cantilever eaves composite steel member in the present invention.

[0026] Figure 8 It is a schematic diagram of the reinforcing bar in the present invention.

[0027] In the figure, 1. steel truss floor deck; 2. prefabricated cantilever; 3. roof ridge; 4. shear bolts; 5. two-way cover plate; 6. stiffening plate; 7. support connecting steel bars; 8. connecting angle steel; 9. inclined flange; 10. web plate; 11. auxiliary steel plate bottom formwork; 12. main force reinforcement; 13. tension reinforcement; 14. inner stiffening rib plate; 15. outer stiffening rib plate; 16. reinforcement bar; 17. temporary supporting rib plate; 18. structural stiffening plate; 19. first fold line portion; 20. second fold line portion; 21. distribution reinforcement. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0029] The present invention discloses a steel bar truss floor decking combined slope roof with prefabricated cantilever eaves, referring to Figure 1-8 , including a steel truss floor deck 1 and a prefabricated cantilever 2, wherein the steel truss floor deck 1 is laid along the slope on a sloping roof frame formed by a steel frame system.

[0030] Among them, the steel frame system includes rigidly connected steel frame beams GKLa, GKLb, GKLc and hingedly connected steel secondary beams GL1; the steel frame beam GKLa is used as the top steel beam of the roof ridge, and the steel frame beam GKLb is used as the edge steel beam of the slope roof, and the length axis of the steel frame beam GKLb is parallel to the length axis of GKLa; the steel frame beam GKLc is arranged on both sides of the steel frame beam GKLa along the slope to form a two-way slope; the steel secondary beam GL1 is hinged between the steel frame beams GKLc at a certain interval, and the steel secondary beam GL1 is parallel to the length axis of the steel frame beams GKLa and GKLb; the steel truss floor deck 1 is laid along the slope on the slope roof frame, and the upper flanges of the steel frame beams and steel secondary beams are fixedly connected to the lower surface of the floor deck through shear bolts 4. During construction, if the distances A and B between two adjacent steel beams are not greater than the allowable span of the floor deck during the construction stage, temporary support may not be specially set.

[0031] The roof ridge is supported by the roof ridge 3. The bottom of the roof ridge 3 is fixedly connected to the steel frame system, and the top of the roof ridge 3 is connected to the steel truss floor deck 1 by shear bolts 4. The roof ridge 3 includes a two-way cover plate 5 and a plurality of stiffening plates 6. The two-way cover plate 5 is fixed to the top of the steel frame beam GKLa through the stiffening plates 6. The upper surface of the two-way cover plate 5 is connected to the steel truss floor deck 1. The plurality of stiffening plates 6 are arranged at intervals on the lower surface of the two-way cover plate 5 along the length axis of the steel frame beam GKLa. In this embodiment, the roof ridge 3 is spliced ​​by stiffening plates 6 with a thickness of 6mm and a spacing of 1000mm and two-way cover plates 5 with a thickness of 8mm, and the stiffening plates 6 correspond to the structural stiffening plates 18 on both sides of the web 10 of the steel frame beam GKLa.

[0032] The two-way cover plate 5 is provided with support connecting steel bars 7, which are anchored into the steel truss floor deck 1 and welded to the upper chord steel bars of the steel truss floor deck 1. In this embodiment, two support connecting steel bars are provided at the top of the ridge, and their specifications are 8@200.

[0033] The steel truss floor deck 1 includes a plurality of individual floor decks, and connecting angle steels 8 and supporting connecting steel bars 7 are arranged between adjacent individual floor decks; the length axis of the connecting angle steel 8 is parallel to the length axis of the steel beam GL1, and the connecting angle steel 8 is welded and fixed to the upper flange of the steel beam GL1. The connecting angle steel 8 divides the sloping roof into different areas with different spacings, and the concrete is poured in different areas, which can effectively block the sliding of the concrete along the slope due to its own weight, and the phenomenon of thick ends and thin tops of the sloping roof will not occur; the supporting steel bars at the bottom are welded to the connecting angle steel 8 and the lower chord steel bars of the floor deck, and the supporting steel bars at the top are welded to the chord steel bars of the floor deck, which effectively improves the integrity of the connection between adjacent floor decks and prevents the floor decks from sliding along the slope.

[0034] An inclined upper flange is arranged on the top of the steel beam GL1, and the inclination angle of the inclined upper flange is consistent with the roof slope. Shear studs 4 are arranged between the steel truss floor deck 1 and the inclined upper flange. The shear studs 4 enable the steel beam and the floor deck to be directly and reliably connected, with good integrity, forming an effective composite beam force mechanism.

[0035] The end of the steel truss floor deck 1 is provided with a cantilevered prefabricated cantilever 2, and the upper flange of the outermost steel frame beam GKLb is provided with a butt groove, and the butt groove is welded and fixed to the auxiliary steel plate bottom formwork 11; the auxiliary steel plate bottom formwork 11 is spot-welded and fixed to the outer stiffening ribs 15 of the steel frame beam GKLb through temporary supporting ribs 17, and the temporary supporting ribs 17 are removed after the upper concrete pouring and curing of the prefabricated cantilever 2 is completed. In actual working conditions, each component is further processed by the steel structure factory, and the auxiliary steel plate bottom formwork 11, temporary supporting ribs 17, and steel frame beam GKLb can be combined and prefabricated.

[0036] In this embodiment, the auxiliary steel plate bottom formwork 11 has a thickness of 20 mm and is welded to the upper flange of the steel frame beam GKLb with a groove. A grid sheet containing main stress-bearing bars 12 is arranged between the auxiliary steel plate bottom formwork 11 and the steel frame beam GKLb. Tie bars 13 are arranged on the diagonal of the grid sheet. The higher end of the tie bars 13 is located on the lower side of the cantilever. The grid sheet of main stress-bearing bars 12 is welded on both sides to the upper flange of the steel frame beam GKLb and the auxiliary steel plate bottom formwork 11 to enhance the out-of-plane bending stiffness of the auxiliary steel plate bottom formwork 11. Among them, the auxiliary steel plate is the side formwork of the sloping roof concrete slab and also the bottom formwork. The main stress-bearing bars 12 are welded to the upper flange of the steel frame beam GKLb, and the welding length is not less than 180 mm. The main stress-bearing bars 12 are additionally arranged on the diagonal of the rectangular grid. The reinforcement 13 of 8@200 is reliably tied with the distribution reinforcement 21. During factory prefabrication, a strip temporary supporting rib 17 with a thickness of 12mm, a height of 150mm and a spacing of the same as the GKLb outer stiffening rib 15 is added between the auxiliary steel plate bottom form 11 and the outer stiffening rib 15 to temporarily fix and support the auxiliary steel plate bottom form 11 to prevent buckling deformation during transportation, hoisting and pouring of concrete; there is no need to specially set up ground support or wall-mounted triangular steel support to support the formwork for pouring concrete, saving construction period and construction cost; after the upper concrete of the prefabricated cantilever 2 is cured, the temporary supporting rib 17 can be removed.

[0037] In this embodiment, the thickness of the upper and lower flanges of the steel frame beam GKLb is greater than or equal to 20 mm, and inner stiffening ribs 14 and outer stiffening ribs 15 with a thickness of 12 mm and a spacing of 1000 mm are symmetrically arranged on both sides of the web 10 of the steel frame beam GKLb along the slope direction of the slope.

[0038] A zigzag reinforcing rib 16 is provided on the outer side of the inner stiffening rib plate 14 of the steel frame beam GKLb. The reinforcing rib 16 includes a first zigzag portion 19 and a second zigzag portion 20 that are fixedly connected. The first zigzag portion 19 is connected to the outer side of the inner stiffening rib, a portion of the second zigzag portion 20 is connected to the upper chord of the steel truss floor deck 1, and the other portion is connected to the main force-bearing rib 12 of the prefabricated cantilever 2 grid sheet. In this embodiment, the reinforcing rib 16 is double-sidedly welded to the inner stiffening rib plate 14, the chord of the floor deck, and the main force-bearing rib 12 of the prefabricated cantilever 2, so that the steel frame beam GKLb works in coordination with the floor deck and the prefabricated cantilever 2 to improve the overall force-bearing performance.

[0039] The construction process of the steel bar truss floor deck combined slope roof with prefabricated cantilevered eaves of the present invention is as follows: Step 1, determine the structural plane layout: according to the allowable span of the steel truss floor deck 1 in the construction stage, arrange the steel secondary beams GL1 at a certain interval.

[0040] Step 2: The steel structure factory deepens the roof spine 3 composite steel component: the bottom of the roof spine 3 is fixedly connected to the steel frame system, and the roof spine 3 and the steel frame beam GKLa can be prefabricated as the same composite steel component.

[0041] Step 3, at the disconnection point of adjacent steel truss floor decking slabs 1, the steel structure factory deepens the connection structure of the upper flange of the steel beam GL1: the upper flange of the steel beam GL1 is welded and fixed with the connecting angle steel 8, which can effectively block the sliding of the concrete along the slope due to its own weight, and the phenomenon of the slope roof being thick at the end and thin at the top will not occur; the bottom support steel bars are welded to the connecting angle steel 8 and the lower chord steel bars of the floor decking slabs, which effectively improves the connection integrity between the adjacent floor decking slabs and prevents the floor decking slabs from sliding along the slope.

[0042] Step 4, the steel structure factory deepens the prefabricated cantilever 2 combined steel components: a cantilevered prefabricated cantilever 2 is set at the end of the steel truss floor deck 1, and a butt groove is set on the upper flange of the outermost steel frame beam GKLb, and the butt groove is welded and fixed to the auxiliary steel plate bottom formwork 11; the auxiliary steel plate bottom formwork 11 is spot-welded and fixed to the outer stiffening ribs 15 of the steel frame beam GKLb through temporary supporting ribs 17; the steel structure factory deepens the processing and prefabricates the auxiliary steel plate bottom formwork 11, temporary supporting ribs 17, and steel frame beam GKLb together.

[0043] Step 5, lifting and installation of steel structure: a broken line reinforcement rib 16 is arranged on the outer side of the inner stiffening rib 14 of the steel frame beam GKLb, and the reinforcement rib 16 is welded to the inner stiffening rib 14, the upper chord reinforcement of the floor decking, and the main force reinforcement 12 of the prefabricated cantilever eaves 2 on both sides; at the interface between the floor decking and the upper flange of each steel beam, shear studs 4 are added according to the structure; a slab support connecting steel bar 7 is arranged on the top of the ridge; at the disconnection point of the adjacent steel truss floor decking slabs 1, the support connecting steel bar 7 is welded and fixed, the bottom support steel bar is welded to the connecting angle steel 8 and the lower chord reinforcement of the floor decking slab, and the top support steel bar is welded to the chord reinforcement of the floor decking slab, so as to improve the connection integrity between adjacent floor decking slabs.

[0044] Step 6: Lay out the roof slab stress reinforcement outside the steel truss floor deck 1 and pour concrete.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and substitutions, and these modifications and substitutions are also within the scope of protection covered by the claims.

Claims

1. A steel truss floor deck combined slope roof with prefabricated cantilevered eaves, characterized in that: The invention comprises a steel truss floor deck (1) and a prefabricated cantilevered eave (2). The steel truss floor deck (1) is laid along the slope on a sloping roof frame formed by a steel frame system. A cantilevered prefabricated cantilevered eave (2) is arranged at the end of the steel truss floor deck (1). The sloping ridge of the roof is supported by a roof ridge (3). The bottom of the roof ridge (3) is fixedly connected to the steel frame system. The top of the roof ridge (3) is connected to the steel truss floor deck (1) by using shear bolts (4).

2. The steel bar truss floor deck combined slope roof with prefabricated overhanging eaves according to claim 1 is characterized in that: The steel frame system comprises rigidly connected steel frame beams GKLa, GKLb, GKLc and hingedly connected steel secondary beams GL1; the steel frame beam GKLa is used as the ridge top steel beam, the steel frame beam GKLb is used as the slope roof edge sealing steel beam, and the length axis of the steel frame beam GKLb is parallel to the length axis of GKLa; the steel frame beam GKLc is arranged along the slope on both sides of the steel frame beam GKLa to form a two-way slope; the steel secondary beam GL1 is hinged between the steel frame beams GKLc at a certain interval, and the steel secondary beam GL1 is parallel to the length axes of the steel frame beams GKLa and GKLb; the upper flanges of the steel frame beams and the steel secondary beams are fixedly connected to the lower surface of the steel truss floor deck (1) by shear bolts (4).

3. The steel bar truss floor deck composite slope roof with prefabricated overhanging eaves according to claim 2 is characterized in that: The roof ridge (3) comprises a bidirectional cover plate (5) and a plurality of stiffening plates (6); the bidirectional cover plate (5) is fixed to the top of the steel frame beam GKLa via the stiffening plates (6); the upper surface of the bidirectional cover plate (5) is connected to the steel truss floor deck (1); and the plurality of stiffening plates (6) are arranged at intervals on the lower surface of the bidirectional cover plate (5).

4. The steel bar truss floor deck combined slope roof with prefabricated overhanging eaves according to claim 3 is characterized in that: The bidirectional cover plate (5) is provided with support connection steel bars (7), which are anchored into the steel truss floor deck (1) and fixedly connected to the upper chord steel bars of the steel truss floor deck (1).

5. The steel bar truss floor deck composite slope roof with prefabricated overhanging eaves according to claim 2 is characterized in that: The steel truss floor deck (1) comprises a plurality of single floor decks, and connecting angle steels (8) and support connecting steel bars (7) are arranged between adjacent floor decks and on the upper flange of a steel beam GL1, wherein the length axis of the connecting angle steel (8) is parallel to the length axis of GL1; the connecting angle steel (8) is welded and fixed to the upper flange of GL1, the support connecting steel bars (7) at the bottom are welded and fixed to the connecting angle steel (8) and the lower chord steel bars of the floor deck, and the support connecting steel bars (7) at the top are welded and fixed to the upper chord steel bars of the floor deck.

6. The steel bar truss floor deck composite slope roof with prefabricated overhanging eaves according to claim 5 is characterized in that: An inclined upper flange is arranged on the top of the steel beam GL1, and the inclination angle of the inclined upper flange is consistent with the roof slope; and shear bolts (4) are arranged between the steel truss floor deck (1) and the inclined upper flange.

7. The steel bar truss floor deck composite slope roof with prefabricated overhanging eaves according to claim 2 is characterized in that: The upper flange of the outermost steel frame beam GKLb is provided with a butt groove, and the butt groove is welded to fix the auxiliary steel plate bottom formwork (11). The auxiliary steel plate bottom formwork (11) is spot-welded and fixed to the outer side stiffening ribs (15) of the steel frame beam GKLb through temporary supporting ribs (17). After the upper concrete pouring and curing of the prefabricated cantilever eaves (2) is completed, the temporary supporting ribs (17) are removed.

8. The steel bar truss floor deck composite slope roof with prefabricated overhanging eaves according to claim 7 is characterized in that: A grid sheet containing main force reinforcement (12) is arranged between the auxiliary steel plate bottom formwork (11) and the outermost steel frame beam GKLb, and tie bars (13) are arranged diagonally on the grid sheet. The higher end of the tie bars (13) is located on the lower side of the cantilevered eaves, and the main force reinforcement (12) grid sheet is welded on both sides to the upper flange of the GKLb and the auxiliary steel plate bottom formwork (11).

9. The steel bar truss floor deck composite slope roof with prefabricated overhanging eaves according to claim 8, characterized in that: Inner stiffening ribs (14) and outer stiffening ribs (15) are symmetrically arranged on both sides of the web plate (10) of the steel frame beam GKLb along the slope direction of the slope surface, and the outer side of the inner stiffening rib (14) is provided with a broken line reinforcement bar (16), and the reinforcement bar (16) is used to connect the inner stiffening rib (14), the upper chord steel bars of the floor deck and the main force reinforcement bar (12).

10. The steel bar truss floor deck composite slope roof with prefabricated overhanging eaves according to claim 9, characterized in that: The reinforcing bar (16) comprises a first fold line portion (19) and a second fold line portion (20) which are fixedly connected, the first fold line portion (19) being connected to the outer side of the inner reinforcing rib, a part of the second fold line portion (20) being connected to the upper chord bar of the steel truss floor deck (1), and the other part being connected to the main force-bearing bar (12) of the prefabricated cantilever eaves (2) grid sheet.

Images