Double-layer upright quadrangular pyramid net rack lower hanging type steel structure construction system

Abstract

The utility model relates to a double-layer upright quadrangular pyramid net rack lower hanging type steel structure construction system which comprises a concrete column, a quadrangular pyramid net rack roof, a cross beam, a lower hanging structure, a lower hanging structure unit jig frame, a first square steel support and a second square steel support. A first operation platform, a first guardrail and a bottom plate are arranged at the top of the first square steel bracket; the small vertical rod is welded on the operation platform, and a cross rod is arranged at the upper end of the small vertical rod; anti-displacement clamping plates are arranged on the upper side and the lower side of the transverse rod; the lower end of the vertical rod is connected with the bottom plate; the two anti-displacement clamping plates are connected with the vertical rod; a lifting arm is arranged at the top of the vertical rod; a lifting lug and an electric hoist are arranged at the end part of the lifting arm; and a lower hanging structure unit adjustable bracket is arranged at the upper end of the second square steel bracket. According to the utility model, the adjustable bracket mounting technology of the lower hanging structural unit is adopted, so that the structural unit can be quickly and accurately positioned in the mounting process, the construction error is reduced, and the construction precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a construction system for a double-layer upright square pyramidal grid frame suspended steel structure. Background Technology

[0002] With the continuous development of my country's construction industry, spatial steel space frame structures have been widely used in Chinese construction projects. While pursuing practicality, people are also constantly seeking aesthetically pleasing and unique designs for buildings, and spatial steel space frames offer a convenient solution in this regard. Large-span steel structures are increasingly used in real life, such as large stadiums and theaters. However, in the construction of double-layer upright square pyramidal space frame suspended steel structures, it is necessary to solve the problem of achieving standardized and modular production of structural units within a confined space, while ensuring hoisting efficiency, installation quality, and reducing construction difficulty and risks.

[0003] In summary, for the construction of double-layer upright square pyramidal space frame under-suspension steel structures, it is of great importance to find a double-layer upright square pyramidal space frame under-suspension steel structure and its construction method that is fast to construct, simple to operate, and has high reliability in construction quality. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a construction system for a double-layer upright square pyramidal space frame suspended steel structure.

[0005] To achieve the above technical objectives, this utility model adopts the following technical solution: a double-layer upright quadrangular pyramidal space frame under-hanging steel structure construction system, including concrete columns, a quadrangular pyramidal space frame roof, beams, under-hanging structure, under-hanging structure unit frame, a first square steel support, and a second square steel support. The concrete columns are equipped with standardized corbels, and the two ends of the beams rest on these standardized corbels. The under-hanging structure is assembled from several under-hanging structure units. The under-hanging structure unit frame is used to process the under-hanging structure units. The top of the first square steel support is equipped with a first operating platform, a first guardrail, and a base plate. The first operating platform has a first reserved hole, in which a reinforcing sleeve is welded. Small uprights are welded to the operating platform. On the platform, a horizontal bar is installed at the top of the small uprights, and a second reserved hole is provided on both the horizontal bar and the anti-displacement plate; anti-displacement plates are provided on both the upper and lower sides of the horizontal bar; the vertical bar passes through the second reserved hole on the horizontal bar and the anti-displacement plate, as well as the reinforcing sleeve, and the lower end of the vertical bar is connected to the base plate; two anti-displacement plates are connected to the vertical bar; a boom is installed at the top of the vertical bar, and a lifting lug and an electric hoist are installed at the end of the boom. The electric hoist is hung below the lifting lug and a wire rope is connected to the electric hoist; the lower structure unit is hoisted by the electric hoist and the wire rope; an adjustable bracket for the lower structure unit is installed at the upper end of the second square steel bracket, and the height of the lower structure unit is adjusted by the adjustable bracket.

[0006] Preferably, the adjustable bracket of the lower structure unit includes a support base, a liftable support, and a support rod, with the support base located at the bottom of the liftable support and the support rod located at the top of the liftable support.

[0007] Preferably, the bottom of the first square steel bracket is fixedly connected to the second enlarged base, and the bottom of the first square steel bracket is provided with a second ear plate, which is fastened to the second enlarged base by bolts.

[0008] Preferably, the bottom of the second square steel bracket is fixed to the third enlarged base, and the bottom of the second square steel bracket is provided with a third ear plate, which is fastened to the third enlarged base by bolts.

[0009] Preferably, the lower-mounted structural unit frame includes a first enlarged base, pre-embedded anchor rods, longitudinal beams, transverse beams, vertical beams, a first ear plate, a U-shaped positioning plate, a pull-out separable fixing sleeve, a plug, a U-shaped slot, and a U-shaped end. The longitudinal beams are arranged between the first enlarged bases, and the first enlarged bases are fixed to the concrete ground by pre-embedded anchor rods. The vertical beams are arranged on the first enlarged bases and perpendicular to them. The bottom of the vertical beams is provided with a first ear plate, which is fixed to the first enlarged bases by bolts. The transverse beams are connected between adjacent vertical beams. The top of the vertical beams is provided with an embedded groove and a fixing hole. The plug-in detachable fixing sleeve includes two symmetrically arranged U-shaped slots. Each U-shaped slot has a U-shaped end on both sides, and a second fixing hole is provided on the U-shaped end. The U-shaped ends on the two U-shaped slots are fastened together to form a plug. The plug-out detachable fixing sleeve is installed between the tops of the two vertical beams. The plugs at both ends of the plug-out detachable fixing sleeve are inserted into the embedded slots and fixed by pins. A square space is formed between the two U-shaped slots on the plug-out detachable fixing sleeve. A U-shaped positioning plate is provided at the bottom of the square space and welded to the crossbeam.

[0010] Preferably, an integrated embedded part and an embedded steel sleeve are pre-embedded in the concrete column, and the shaped bracket is provided with installation holes and reserved grooves; the two ends of the integrated embedded part are respectively provided with a clamping plate and a first anti-detachment steel plate; the embedded steel sleeve is provided with a second anti-detachment steel plate; the integrated embedded part is inserted into the reserved groove on the shaped bracket, and the shaped bracket is fixed by the clamping plate; a threaded fixing rod is installed at the installation hole position of the shaped bracket, and the threaded fixing rod passes through the installation hole on the shaped bracket and is connected to the embedded steel sleeve.

[0011] As a preferred option, the integrated embedded part is provided with an embedded dividing line, and the distance from the embedded dividing line to the card plate is the thickness of the steel plate of the shaped bracket.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model adopts a double-layer upright quadrangular pyramidal space frame design, which increases the stability and load-bearing capacity of the structure, enabling it to adapt to complex engineering conditions such as large spans and heavy loads.

[0014] 2. This utility model adopts the application of the under-hanging structural unit frame processing technology, which realizes the standardized and modular production of structural units, and improves construction efficiency and quality.

[0015] 3. This utility model adopts an adjustable bracket installation technology for the lower-hanging structural unit, which enables the structural unit to be positioned quickly and accurately during installation, reducing construction errors and improving construction precision.

[0016] 4. This utility model adopts electric hoist lifting and installation technology, which reduces the risk of high-altitude operations and improves construction safety; by using electric hoists to lift and install structural units, manual operation is reduced, and construction difficulty and danger are lowered. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-section of a double-layer upright square pyramidal space frame with a suspended steel structure.

[0018] Figure 2 This is a detailed schematic diagram of a four-cornered pyramidal space frame roof;

[0019] Figure 3 This is a schematic diagram of the machining frame for the lower hanging structure unit;

[0020] Figure 4 This is a schematic diagram of a pull-out, detachable fixing sleeve;

[0021] Figure 5 This is a schematic diagram of a half-width pull-out detachable fixing sleeve;

[0022] Figure 6 This is a schematic diagram of the standardized bracket installation;

[0023] Figure 7 This is a schematic diagram of the standardized bracket installation cross-section;

[0024] Figure 8 This is a detailed schematic diagram of an integrated embedded component;

[0025] Figure 9 This is a schematic diagram of an electric hoist lifting installation system;

[0026] Figure 10 This is a schematic diagram of the fixed end of the vertical rod;

[0027] Figure 11 This is a schematic diagram of an adjustable bracket for the lower hanging structure unit.

[0028] In the diagram: 1-Concrete column, 2-Standardized corbel, 3-Steel beam, 4-Lower hanging structure, 5-Fixed spherical hinge support, 6-Four-corner pyramidal space frame roof, 7-Upper chord spherical column, 8-Lower chord spherical column, 9-Diagonal web member, 10-Lower chord member, 11-H-shaped steel hanging column, 12-Upper chord member, 13-First enlarged base, 14-Embedded anchor rod, 15-Longitudinal beam, 16-Horizontal beam, 17-Vertical beam, 18-First ear plate, 19-U-shaped positioning plate, 20-Embedded groove, 21-First fixing hole, 22-Pull-out detachable fixing sleeve, 23-Plug, 24-U-shaped slot, 25-U-shaped end, 26-Threaded fixing rod, 27-Reserved groove, 28-Card plate, 29-Integrated embedded part, 30-Embedded steel sleeve, 31-Anti-falling steel plate 32-Embedded dividing line, 33-First square steel bracket, 34-Base plate, 35-Vertical rod, 36-First operating platform, 37-Reinforcing sleeve, 38-Small upright, 39-Horizontal rod, 40-Anti-displacement clamping plate, 41-Vertical rod, 42-Hanging arm, 43-Diagonal brace, 44-First guardrail, 45-Lifting lug, 46-Electric hoist, 47-Wire rope, 48-Lower hanging structural unit, 49-Column, 50-Support base, 51-Liftable support frame, 52-Support rod, 53-Second fixing hole, 54-Second anti-falling steel plate, 55-Second enlarged base, 56-Second ear plate, 57-Second square steel bracket, 58-Third enlarged base, 59-Third ear plate, 60-Second operating platform, 61-Second guardrail. Detailed Implementation

[0029] The present invention will be further described below with reference to embodiments, wherein traditional construction methods such as concrete frame construction, component processing, component connection, and bolt fixing are not described in detail. The following description of the embodiments is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0030] Figure 1 This is a schematic diagram of the cross-section of a double-layer upright square pyramidal space frame with a suspended steel structure. Figure 2 This is a detailed schematic diagram of a four-cornered pyramidal space frame roof; Figure 3 This is a schematic diagram of the machining frame for the lower hanging structure unit; Figure 4 This is a schematic diagram of a pull-out, detachable fixing sleeve; Figure 5 This is a schematic diagram of a half-width pull-out detachable fixing sleeve; Figure 6 This is a schematic diagram of the standardized bracket installation; Figure 7 This is a schematic diagram of the standardized bracket installation cross-section; Figure 8 This is a detailed schematic diagram of an integrated embedded component; Figure 9 This is a schematic diagram of an electric hoist lifting installation system; Figure 10 This is a schematic diagram of the fixed end of the vertical rod; Figure 11 This is a schematic diagram of an adjustable bracket for the lower hanging structure unit.

[0031] Referring to the figures, the double-layer upright square pyramidal space frame with suspended steel structure includes: 1. Concrete column; 2. Standardized corbel; 3. Steel beam; 4. Suspended structure; 5. Fixed spherical hinge support; 6. Square pyramidal space frame roof; 7. Upper chord spherical support; 8. Lower chord spherical support; 9. Diagonal web member; 10. Lower chord member; 11. H-shaped steel hanging column; 12. Upper chord member; 13. First enlarged base; 14. Embedded anchor rod; 15. Longitudinal beam; 16. Horizontal beam; 17. Vertical beam; 18. First ear plate; 19. U-shaped positioning plate; 20. Embedded groove; 22. Pull-out detachable fixing sleeve; 23. Plug; 24. U-shaped slot; 25. U-shaped end; 26. Threaded fixing rod; 27. Reserved groove; 28. Clamping plate; 29. ​​Integrated embedded part; 30. Embedded steel sleeve; [Further details needed for complete translation] 31. Detachable steel plate, 32. Embedded dividing line, 33. First square steel bracket, 34. Base plate, 35. Vertical rod, 36. Operating platform, 37. Reinforcing sleeve, 38. Small upright, 39. Horizontal rod, 40. Anti-displacement clamp, 41. Vertical rod, 42. Crane arm, 43. Diagonal brace, 44. Second guardrail, 45. Lifting lug, 46. Electric hoist, 47. Wire rope, 48. Lower hanging structure unit, 49. Column, 50. Support base, 51. Liftable support frame, 52. Support rod, 53. Second fixing hole, 54. Second anti-detachment steel plate, 55. Second enlarged base, 56. Second ear plate, 57. Second square steel bracket, 58. Third enlarged base, 59. Third ear plate, 60. Second operating platform, 61. Second guardrail.

[0032] The quadrangular pyramidal space frame roof 6 includes an upper chord sphere 7, a lower chord sphere 8, diagonal web members 9, a lower chord member 10, and an upper chord member 12. The upper chord member 12 is positioned between adjacent upper chord spheres 7, and the diagonal web member 9 is positioned between the upper chord sphere 7 and the lower chord sphere 8. The quadrangular pyramidal space frame roof 6 is connected to the concrete column 1 via a fixed spherical hinge support 5. The lower hanging structure 4 is connected to the lower chord sphere 8 and the standardized corbel 2 on the concrete column 1 via H-shaped steel hanging columns 11 and steel beams 3, respectively. The two ends of the steel beams 3 rest on the standardized corbel 2 on the concrete column 1. The lower hanging structure 4 is assembled from several lower hanging structure units 48.

[0033] The lower hanging structural unit 48 is manufactured using a lower hanging structural unit jig. The lower hanging structural unit jig includes a first enlarged base 13, a pre-embedded anchor rod 14, a longitudinal beam 15, a transverse beam 16, a vertical beam 17, a first ear plate 18, a U-shaped positioning plate 19, a pull-out separable fixing sleeve 22, a plug 23, a U-shaped slot 24, and a U-shaped end 25. The longitudinal beam 15, transverse beam 16, and vertical beam 17 form a load-bearing frame. The longitudinal beam 15 is located between the first enlarged bases 13, and the first enlarged bases 13 are fixed to the concrete ground by the pre-embedded anchor rods 14. The vertical beam 17 is located on the first enlarged bases 13 and is perpendicular to the first enlarged bases 13. The bottom of the vertical beam 17 is provided with a first ear plate 18, which is fixed to the first enlarged base 13 by bolts. The transverse beam 16 is connected between adjacent vertical beams 17. The top of the vertical beam 17 is provided with an embedded groove 20 and a fixing hole 21. The embedded groove 20 is a U-shaped groove. The pull-out detachable fixing sleeve 22 adopts a symmetrical structure. The pull-out detachable fixing sleeve 22 includes two symmetrically arranged U-shaped slots 24. Each U-shaped slot 24 has a U-shaped end 25 symmetrically arranged on both sides. A second fixing hole 53 is provided on the U-shaped end 25. The U-shaped ends 25 on the two U-shaped slots 24 are correspondingly fastened to form a plug 23. The pull-out detachable fixing sleeve 22 is installed on the two vertical beams. Between the top of 17, the plugs 23 at both ends of the pull-out detachable fixing sleeve 22 are inserted into the embedded grooves 20 and fixed by pins. The pins are simultaneously inserted into the first fixing hole 21 at the upper end of the vertical beam 17 and the second fixing hole 53 on the U-shaped end 25. After the pull-out detachable fixing sleeve 22 is installed, a square space is formed between the two U-shaped slots 24 on the pull-out detachable fixing sleeve 22. A U-shaped positioning plate 19 is correspondingly provided at the lower part of the square space. The U-shaped positioning plate 19 is welded to the crossbeam 16. When manufacturing the lower hanging structure unit 48 using the lower hanging structure unit jig, the uprights 49 are inserted into the square space. The lower part of the uprights 49 is supported on the U-shaped positioning plate 19. The area of ​​the slot above the U-shaped positioning plate 19 is the same as the cross-sectional area of ​​the uprights 49. After the four uprights 49 are fixed, the other components of the lower hanging structure unit 48 are welded. After the lower hanging structure unit 48 is processed, the pins used to fix the pull-out separation fixing sleeve 22 are removed, and the pull-out separation fixing sleeve 22 is removed. Then, the lower hanging structure unit 48 is hoisted as a whole.

[0034] The standardized bracket 2 is made of steel plate and has mounting holes and reserved grooves 27. The integrated embedded part 29 is made of threaded steel. Both ends of the integrated embedded part 29 are respectively provided with clamping plates 28 and first anti-detachment steel plates 31. The integrated embedded part 29 is provided with a pre-embedded dividing line 32. The pre-embedded steel sleeve 30 is provided with a second anti-detachment steel plate 54. The integrated embedded part 29 and the pre-embedded steel sleeve 30 are pre-embedded during the construction of the concrete column 1. The distance from the pre-embedded dividing line 32 to the clamping plate 28 is... The thickness of the steel plate of the standardized bracket 2 is specified. After the standardized bracket 2 is processed, it is installed by aligning the reserved groove 27 on the standardized bracket 2 with the integrated embedded part 29, and inserting the integrated embedded part 29 into the reserved groove 27 on the standardized bracket 2. The standardized bracket 2 is then precisely positioned and fixed by the clamping plate 28. Then, a threaded fixing rod 26 is installed at the mounting hole position of the standardized bracket 2. The threaded fixing rod 26 passes through the mounting hole on the standardized bracket 2 and is connected to the embedded steel sleeve 30. The two ends of the crossbeam 3 rest on the standardized bracket 2.

[0035] The bottom of the first square steel support 33 is fixedly connected to the second enlarged base 55. The bottom of the first square steel support 33 is provided with a second ear plate 56, which is fastened to the second enlarged base 55 by bolts. The top of the first square steel support 33 is provided with a first operating platform 36, a first guardrail 44, and a base plate 34. The first operating platform 36 is located on the top of the first square steel support 33. The first operating platform 36 is provided with a first reserved hole, and a reinforcing sleeve 37 is welded into the first reserved hole. A small upright 38 is welded to the first operating platform 36. A crossbar 39 is provided at the upper end of the small upright 38. The crossbar 39 and the anti-displacement plate 40 are both provided with second reserved holes. Anti-displacement plates 40 are provided on both the upper and lower sides of the crossbar 39. When installing the vertical rod 41, the second reserved hole on the anti-displacement clamping plate 40 is pre-aligned with the second reserved hole on the horizontal rod 39. The vertical rod 41 is first passed through the horizontal rod 39, the second reserved hole on the anti-displacement clamping plate 40, and the reinforcing sleeve 37. The lower end of the vertical rod 41 is connected to the base plate 34, and the base plate 34 is fixedly connected to the first square steel bracket 33. Then, the two anti-displacement clamping plates 40 are welded together with the vertical rod 41. The vertical rod 41 can rotate within the second reserved hole on the horizontal rod 39 and the reinforcing sleeve 37. The boom 42 is set at the top of the vertical rod 41, and a diagonal brace 43 is set between the boom 42 and the vertical rod 41 for reinforcement. The end of the boom 42 is equipped with a lifting lug 45 and an electric hoist 46. The electric hoist 46 is hung below the lifting lug 45, and a wire rope 47 is connected to the electric hoist 46. The lower structural unit 48 is hoisted by the electric hoist 46 and the wire rope 47.

[0036] The adjustable bracket for the lower hanging structure unit consists of a support base 50, a liftable support frame 51, and a support rod 52. The support base 50 is located at the bottom of the liftable support frame 51, and the support rod 52 is located at the top of the liftable support frame 51. The adjustable bracket for the lower hanging structure unit is installed on the upper end of the second square steel bracket 57. The bottom of the second square steel bracket 57 is fixed to the third expanded base 55. The top of the second square steel bracket 57 is equipped with a second operating platform 60 and a second guardrail 61. The bottom of the second square steel bracket 57 is provided with a third ear plate 59, which is fastened to the third expanded base 55 by bolts. The adjustable bracket for the lower hanging structure unit is arranged according to the design. The electric hoist 46 hoists the lower hanging structure unit 48 onto the support rod 52 on the adjustable bracket for the lower hanging structure unit using a wire rope 47. The height of the lower hanging structure unit 48 is adjusted and installed using the adjustable bracket for the lower hanging structure unit.

[0037] This invention also provides a construction method for a double-layer upright square pyramidal space frame with suspended steel structure, the main construction steps of which are as follows:

[0038] Step 1, Embedded part construction: During the construction of concrete column 1, the embedded part 29 and the embedded steel sleeve 30 are embedded simultaneously, so that the embedded part 29 and the embedded steel sleeve 30 are embedded in the concrete column 1.

[0039] Step 2: Assembly of the lower-mounted structural unit frame: The lower-mounted structural unit frame includes a first enlarged base 13, pre-embedded anchor rods 14, longitudinal beams 15, transverse beams 16, vertical beams 17, first ear plates 18, U-shaped positioning plates 19, a pull-out detachable fixing sleeve 22, a plug 23, U-shaped slots 24, and U-shaped ends 25. The enlarged base 13 is fixed to the concrete ground by the pre-embedded anchor rods 14. The longitudinal beams 15 are installed between the first enlarged bases 13. The first ear plates 18 are set at the bottom of the vertical beams 17 and are fixed to the first enlarged bases 13 by bolts. The vertical beams 17 are installed on the first enlarged bases 13. The top of the vertical beams 17 is provided with embedded grooves 20 and fixing holes 21. The pull-out detachable fixing sleeve 22 includes two symmetrically arranged U-shaped slots 24, each... U-shaped ends 25 are symmetrically arranged on both sides of the U-shaped slot 24. A second fixing hole 53 is provided on the U-shaped end 25. The U-shaped ends 25 on the two U-shaped slots 24 are correspondingly fastened to form a plug 23. The pull-out separable fixing sleeve 22 is installed between the tops of the two vertical beams 17. The plugs 23 at both ends of the pull-out separable fixing sleeve 22 are inserted into the embedded grooves 20 and fixed by pins. The pins are simultaneously inserted into the first fixing hole 21 at the upper end of the vertical beam 17 and the second fixing hole 53 on the U-shaped end 25. After the pull-out separable fixing sleeve 22 is installed, a square space is formed between the two U-shaped slots 24 on the pull-out separable fixing sleeve 22. A U-shaped positioning plate 19 is installed below the square space and welded to the crossbeam 16.

[0040] Step 3: Processing the lower hanging structure unit 48: Insert the uprights 49 into the square space. The lower part of the uprights 49 is supported on the U-shaped positioning plate 19. After the four uprights 49 are fixed, weld the other components of the lower hanging structure unit 48. After the lower hanging structure unit 48 is processed, remove the pins used to fix the pull-out separation fixing sleeve 22 and remove the pull-out separation fixing sleeve 22. Then, hoist the lower hanging structure unit 48 as a whole. The other components of the lower hanging structure unit 48 include horizontal connecting rods and vertical connecting rods. The horizontal connecting rods are welded between the uprights 49. The horizontal connecting rods and vertical connecting rods are arranged in a crisscross pattern.

[0041] Step 4, Installation of Standardized Brackets: Standardized brackets 2 are fabricated, with mounting holes and pre-reserved slots 27. The pre-reserved slots 27 on the standardized brackets 2 are aligned with the integrated embedded part 29, and the integrated embedded part 29 is inserted into the pre-reserved slots 27 on the standardized brackets 2. The standardized brackets 2 are precisely positioned and fixed using a clamping plate 28. Then, threaded fixing rods 26 are installed at the mounting holes of the standardized brackets 2. The threaded fixing rods 26 pass through the mounting holes on the standardized brackets 2 and are connected to the pre-embedded steel sleeve 30. A crossbeam 3 is installed between the standardized brackets 2.

[0042] Step 5: Hoisting of the lower structural unit: The bottom of the first square steel bracket 33 is fixedly connected to the second enlarged base 55. The first operating platform 36, the first guardrail 44, and the base plate 34 are installed on the top of the first square steel bracket 33. A first pre-drilled hole is set on the first operating platform 36, and a reinforcing sleeve 37 is welded into the pre-drilled hole. The small upright 38 is welded and fixed to the first operating platform 36. A horizontal bar 39 is set at the upper end of the small upright 38. Second pre-drilled holes are set on both the horizontal bar 39 and the anti-displacement clamping plate 40. Second pre-drilled holes are set on both the upper and lower sides of the horizontal bar 39. Install the anti-displacement plate 40, and then install the vertical rod; when installing the vertical rod 41, first align the second reserved hole on the anti-displacement plate 40 with the second reserved hole on the horizontal bar 39, and pass the vertical rod 41 through the horizontal bar 39, the second reserved hole on the anti-displacement plate 40, and the reinforcing sleeve 37. The lower end of the vertical rod 41 is connected to the base plate 34; then weld the two anti-displacement plates 40 together with the vertical rod 41; install the boom 42 on the vertical rod 41, and install the lifting lug 45 and the electric hoist 46 on the lower side of the end of the boom 42. Connect the wire rope 47 to the electric hoist 46.

[0043] Simultaneously, an adjustable bracket for the lower hanging structure unit is installed; the adjustable bracket for the lower hanging structure unit consists of a support base 50, a liftable support 51, and a support rod 52; the bottom of the second square steel bracket 57 is fixed to the third enlarged base 55; a second operating platform 60 and a second guardrail 61 are set on the top of the second square steel bracket 57, and the adjustable bracket for the hanging structure unit is installed on the second operating platform 60 on the top of the second square steel bracket 57;

[0044] The electric hoist 46 hoists the lower structure unit 48 onto the support rod 52 on the adjustable bracket of the lower structure unit via the wire rope 47. The height of the lower structure unit 48 is adjusted on the adjustable bracket of the lower structure unit, and the lower structure unit 48 is installed. The lower structure units 48 are connected to each other to form a complete lower structure 4. H-shaped steel columns 11 are installed between the lower structure 4 and the lower chord ball 8 of the four-corner pyramidal grid roof 6. The lower structure 4 is connected to the crossbeam 3.

Claims

1. A double-layer square pyramid space truss lower hanging steel structure construction system, characterized in that, The utility model relates to a kind of prefabricated construction method of four-cornered pyramid net rack roof, including concrete column (1), four-cornered pyramid net rack roof (6), crossbeam (3), lower hanging structure (4), lower hanging structure unit jig frame, first square steel support (33), second square steel support (57), concrete column (1) is equipped with shaped bracket (2), the both ends of crossbeam (3) rest on shaped bracket (2);Lower hanging structure (4) is assembled by several lower hanging structure units (48);Lower hanging structure unit jig frame is used to process lower hanging structure unit (48);The top of first square steel support (33) is provided with first operation platform (36), first guardrail (44), bottom plate (34);First operation platform (36) is provided with first reserved hole, and reinforcing sleeve (37) is welded in first reserved hole;Small vertical rod (38) is welded on operation platform (36), and the upper end of small vertical rod (38) is provided with crossbar (39), and second reserved hole is formed in crossbar (39) and anti-displacement clamping plate (40);Crossbar (39) is provided with anti-displacement clamping plate (40) on both sides, and vertical rod (41) passes through the second reserved hole of crossbar (39) and anti-displacement clamping plate (40) and reinforcing sleeve (37), and the lower end of vertical rod (41) is connected with bottom plate (34);Two anti-displacement clamping plates (40) are connected with vertical rod (41);The top of vertical rod (41) is provided with hanging arm (42), and the end of hanging arm (42) is provided with lifting lug (45) and electric hoist (46), and steel wire rope (47) is connected to electric hoist (46);Lower hanging structure unit (48) is hoisted by electric hoist (46) and steel wire rope (47);The upper end of second square steel support (57) is provided with lower hanging structure unit adjustable support, and the height of lower hanging structure unit (48) is adjusted by lower hanging structure unit adjustable support.

2. The double-layer, upward-acting, quadrilateral-pyramid space truss, lower-hanging type steel structure construction system according to claim 1, characterized in that, The lower hanging structure unit adjustable support includes support base (50), liftable support (51) and resting support rod (52), the support base (50) is located at the bottom of the liftable support (51), and the resting support rod (52) is located at the top of the liftable support (51).

3. The double-layer, upward-acting, square pyramid space truss, lower-hung type steel structure construction system according to claim 1, characterized in that, The bottom of the first square steel support (33) is fixedly connected with the second enlarged base (55), and the bottom of the first square steel support (33) is provided with the second ear plate (56), and the second ear plate (56) is fixedly connected with the second enlarged base (55) by bolts.

4. The double-layer, upward-acting, square pyramid net rack, lower-hanging type steel structure construction system according to claim 1, characterized in that, The bottom of the second square steel support (57) is fixedly connected with the third enlarged base (55), and the bottom of the second square steel support (57) is provided with the third ear plate (59), and the third ear plate (59) is fixedly connected with the third enlarged base (55) by bolts.

5. The double-layer, upward-acting, square pyramid net rack, lower-hanging type steel structure construction system according to claim 1, characterized in that, The hanging structure unit frame comprises first enlarged bases (13), pre-buried anchor rods (14), longitudinal beams (15), cross beams (16), vertical beams (17), first ear plates (18), U-shaped positioning plates (19), a plug-and-socket separated fixing sleeve device (22), a plug (23), U-shaped clamping grooves (24) and U-shaped end heads (25). The longitudinal beams (15) are arranged between the first enlarged bases (13), and the first enlarged bases (13) are fixed to the concrete ground through the pre-buried anchor rods (14). The vertical beams (17) are arranged on the first enlarged bases (13) and are perpendicular to the first enlarged bases (13). The first ear plates (18) are arranged at the bottom of the vertical beams (17) and are fixed to the first enlarged bases (13) through bolts. The cross beams (16) are connected between adjacent vertical beams (17). The vertical beams (17) are provided with embedded grooves (20) and fixing holes (21) at the top. The plug-and-socket separated fixing sleeve device (22) comprises two symmetrically arranged U-shaped clamping grooves (24). Each U-shaped clamping groove (24) is symmetrically provided with a U-shaped end head (25) at two sides. The U-shaped end head (25) is provided with a second fixing hole (53). The U-shaped end heads (25) on the two U-shaped clamping grooves (24) are correspondingly buckled to form the plug (23). The plug-and-socket separated fixing sleeve device (22) is installed between the tops of the two vertical beams (17). The plugs (23) at the two ends of the plug-and-socket separated fixing sleeve device (22) are inserted into the embedded grooves (20) and are fixed through a latch. Two U-shaped clamping grooves (24) on the plug-and-socket separated fixing sleeve device (22) form a square space. The U-shaped positioning plates (19) are arranged at the lower part of the square space and are welded to the cross beams (16).

6. The double-layer, upward-acting, square pyramid net rack, lower-hanging type steel structure construction system according to claim 1, characterized in that, The concrete column (1) is pre-buried with an integrated embedded part (29) and a pre-buried steel sleeve (30). The shaped corbel (2) is provided with a mounting hole and a reserved slot (27). The two ends of the integrated embedded part (29) are respectively provided with a clamping plate (28) and a first anti-falling steel plate (31). The pre-buried steel sleeve (30) is provided with a second anti-falling steel plate (54). The integrated embedded part (29) is clamped into the reserved slot (27) of the shaped corbel (2) and the shaped corbel (2) is fixed through the clamping plate (28). The mounting hole of the shaped corbel (2) is provided with a threaded fixing rod (26). The threaded fixing rod (26) passes through the mounting hole of the shaped corbel (2) and is connected with the pre-buried steel sleeve (30).

7. The double-layer, upward-acting, square pyramid space truss, lower-hung type steel structure construction system according to claim 6, characterized in that, The integrated embedded part (29) is provided with a pre-buried boundary line (32). The distance from the pre-buried boundary line (32) to the clamping plate (28) is the thickness of the steel plate of the shaped corbel (2).

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