Prefabricated shallow silo folded plate roof and roof plate prefabricated unit thereof

Abstract

The present application relates to a kind of prefabricated shallow round silo folded plate roof and its roof board prefabricated unit, mainly by upper ring beam, roof board prefabricated unit and lower ring beam etc., roof board prefabricated unit includes the flat plate structure roof board main body, upper ring beam is prefabricated steel-concrete composite beam, lower ring beam is the concrete beam with embedded bolt embedded in, adjacent roof board prefabricated unit is connected to form folded plate structure, roof board prefabricated unit and upper ring beam, lower ring beam are connected respectively by welding through fastener connection.Three kinds of components are connected to form load-bearing structure, can be used as subsequent construction platform, construction process does not need construction support or only needs a small amount of support, and then cement-based material is poured in the gap of each component connection site to form integral structure, jointly bear vertical load and horizontal load.The present application realizes the planarization prefabrication of single curvature roof structure, easy to produce, assemble, can greatly reduce material consumption, construction period, construction cost, construction difficulty and carbon emission.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of assembled building of granary, in particular to an assembled shallow silo folded plate silo roof and a silo roof plate prefabricated unit thereof. BACKGROUND

[0002] At present, the storage structure forms are various, each has characteristics. Among them, the shallow silo as an important type of storage structure has the characteristics of large storage capacity, small land occupation, large effective volume, good sealing, clear structure stress, good seismic performance, high mechanization degree, etc., so it has become a widely used silo type in recent years. However, due to the fact that the main body of the shallow silo wall is constructed by the relatively mature slip form construction technology in practical application, the construction of the shallow silo roof is very difficult.

[0003] The shallow silo roof is a common conical shell space structure, which comprises an upper ring beam, a lower ring beam and a plurality of silo roof plates arranged in sequence along the circumference and connected between the upper ring beam and the lower ring beam. The silo roof plate is a single curvature sector plate with a certain arc, and adjacent silo roof plates can be placed next to each other. However, such arc-shaped silo roof plates cannot be placed flat on site, resulting in a long construction period and increased difficulty for construction personnel. In addition, it increases the consumption of manpower and material resources during construction, and also causes insecurity during hoisting.

[0004] In order to solve the various problems of the arc-shaped silo roof plate, we have developed a silo roof plate prefabricated unit with a flat plate structure. The main body of the silo roof plate prefabricated unit with a flat plate structure is a flat structure without curves in two directions, which is easy to be industrialized in the factory, can realize the planar prefabrication of the silo roof plate, can be directly placed flat on the construction site, is convenient for assembly and installation, can effectively shorten the construction period, and can optimize the working conditions and reduce the labor intensity of workers. However, the use of the flat plate structure silo roof plate has also caused new problems, such as the connection between adjacent silo roof plates, the connection between the silo roof plate and the upper ring beam, and the connection between the silo roof plate and the lower ring beam. SUMMARY

[0005] The present application aims to provide a silo roof plate prefabricated unit with a flat plate structure silo roof plate main body and convenient connection between adjacent silo roof plate main bodies, and to provide an assembled shallow silo folded plate silo roof using the silo roof plate prefabricated unit.

[0006] To solve the above technical problems, the technical scheme of an assembled shallow silo folded plate silo roof in the present application is as follows:

[0007] An assembled shallow round silo folded plate roof, comprising an upper ring beam, a lower ring beam and a plurality of silo roof plate prefabricated units arranged in sequence along the circumference between the upper ring beam and the lower ring beam, each silo roof plate prefabricated unit comprises a silo roof plate body of a flat structure with a front narrow and a rear wide, and left and right sides of the silo roof plate body are fixed with left and right side channel steels extending along the front and rear directions, each channel steel comprises an upper channel steel leg, a lower channel steel leg and a channel steel waist connected between the upper channel steel leg and the lower channel steel leg, the plate surface extension direction of the upper channel steel leg and the lower channel steel leg is consistent with the plate surface extension direction of the corresponding silo roof plate, defining any two adjacent silo roof plate prefabricated units in the circumferential direction as a first silo roof plate prefabricated unit and a second silo roof plate prefabricated unit, the plate surface extension direction of the silo roof plate body of the first silo roof plate prefabricated unit intersects at an obtuse angle with the plate surface extension direction of the silo roof plate body of the second silo roof plate prefabricated unit, the right end of the lower channel steel leg of the right side channel steel of the first silo roof plate prefabricated unit contacts and is welded to the left end of the lower channel steel leg of the left side channel steel of the second silo roof plate prefabricated unit, the upper side steel leg of the right side channel steel of the first silo roof plate prefabricated unit is arranged in a spaced manner with the upper side steel leg of the left side channel steel of the second silo roof plate prefabricated unit, a plurality of inverted V-shaped connecting plates arranged in a spaced manner along the front and rear directions are arranged between the upper side steel leg of the right side channel steel of the first silo roof plate prefabricated unit and the upper side steel leg of the left side channel steel of the second silo roof plate prefabricated unit, and a silo roof plate interlayer post-poured concrete body is poured between the right side channel steel of the first silo roof plate prefabricated unit and the left side channel steel of the second silo roof plate prefabricated unit.

[0008] Further, each silo roof plate body comprises a silo roof plate reinforcement framework and a silo roof plate concrete body integrally formed with the silo roof plate reinforcement framework, the silo roof plate reinforcement framework comprises a silo roof plate upper side steel mesh and a silo roof plate lower side steel mesh, and the silo roof plate upper side steel mesh and the silo roof plate lower side steel mesh each comprise longitudinal steel bars extending along the front and rear directions and transverse steel bars extending along the left and right directions.

[0009] Further, the right end of the transverse steel bar of the silo roof plate upper side steel mesh extends out of the right side of the silo roof plate concrete body to form a right side extending end of the upper side steel bar, the right end of the transverse steel bar of the silo roof plate lower side steel mesh extends out of the right side of the silo roof plate concrete body to form a right side extending end of the lower side steel bar, and the right side channel steel is welded and fixed between the right side extending end of the upper side steel bar and the right side extending end of the lower side steel bar; the left end of the transverse steel bar of the silo roof plate upper side steel mesh extends out of the left side of the silo roof plate concrete body to form a left side extending end of the upper side steel bar, the left end of the transverse steel bar of the silo roof plate lower side steel mesh extends out of the left side of the silo roof plate concrete body to form a left side extending end of the lower side steel bar, and the left side channel steel is welded and fixed between the left side extending end of the upper side steel bar and the left side extending end of the lower side steel bar.

[0010] Further, the rear end surface of the silo roof concrete body is a plane, the front end surface of the silo roof concrete body is a plane, the silo roof concrete body as a whole is a trapezoid, the inner side of the lower ring beam has an annular recessed step, the rear end of the longitudinal reinforcement of the silo roof upper reinforcement mesh of the silo roof reinforcement framework extends out of the rear end of the silo roof concrete to the recessed part of the recessed step to form a longitudinal reinforcement extension end, and the longitudinal reinforcement extension end is poured with a silo roof-lower ring beam interval post-pouring concrete body in the recessed step.

[0011] Further, a vertically arranged upper end embedded screw rod extending into the recessed step is pre-buried in the lower ring beam, and the rear end of the left side channel steel and the right side channel steel is provided with a horizontally arranged lower ring beam connecting channel steel, and the upper side steel leg of the lower ring beam connecting channel steel and the lower channel steel leg are provided with lower ring beam connecting bolt holes for the embedded screw rod to penetrate.

[0012] Further, the upper ring beam is made of a ring-shaped I-beam, and the upper ring beam comprises an upper flange plate, a lower flange plate and an intermediate web plate connected between the upper flange plate and the lower flange plate, the intermediate web plate is poured with an upper ring beam precast concrete body between the upper flange plate and the lower flange plate on the inner side, and a plurality of reinforcing ribs are welded and fixed between the upper flange plate and the lower flange plate on the outer side of the intermediate web plate, the front end of the left side channel steel and the right side channel steel is provided with a horizontally arranged upper ring beam connecting channel steel, the upper side steel leg of the upper ring beam connecting channel steel is connected to the upper flange plate on the outer side of the intermediate web plate through a vertical bolt, the channel steel waist of the upper ring beam connecting channel steel is connected to the corresponding reinforcing rib through a horizontal bolt, and a silo roof-upper ring beam interval post-pouring concrete body is poured between the upper flange plate and the lower flange plate on the outer side of the intermediate web plate and the front end of the corresponding silo roof precast plate unit.

[0013] Further, a plurality of reinforcing steels are welded and fixed between the upper flange plate and the lower flange plate on the outer side of the intermediate web plate and between the upper flange plate and the lower flange plate on the inner side of the intermediate web plate, and the reinforcing steels are vertically arranged.

[0014] The technical scheme of the silo roof precast unit in the present application is as follows:

[0015] A silo roof precast plate unit of an assembled shallow round silo folded plate silo roof, comprising a front-narrow-and-rear-wide flat plate structure silo roof body, left and right sides of the silo roof body are fixed with left and right channel steels extending in the front-rear direction and having opposite notches, each channel steel comprises an upper channel leg, a lower channel leg and a channel waist connected between the upper channel leg and the lower channel leg, and the plate surface extension direction of the upper channel leg and the lower channel leg is consistent with the plate surface extension direction of the corresponding silo roof.

[0016] Further, each warehouse roof body comprises a warehouse roof reinforced framework and a warehouse roof concrete body integrally formed with the warehouse roof reinforced framework, the warehouse roof reinforced framework comprises an upper warehouse roof steel mesh and a lower warehouse roof steel mesh, the upper warehouse roof steel mesh and the lower warehouse roof steel mesh each comprise longitudinal steel bars extending in the front-rear direction and transverse steel bars extending in the left-right direction, the right end of the transverse steel bars of the upper warehouse roof steel mesh extends out of the right side of the warehouse roof concrete body to form a right-side extending end of the upper steel bars, the right end of the transverse steel bars of the lower warehouse roof steel mesh extends out of the right side of the warehouse roof concrete body to form a right-side extending end of the lower steel bars, and a right-side channel steel is welded and fixed between the right-side extending end of the upper steel bars and the right-side extending end of the lower steel bars; the left end of the transverse steel bars of the upper warehouse roof steel mesh extends out of the left side of the warehouse roof concrete body to form a left-side extending end of the upper steel bars, the left end of the transverse steel bars of the lower warehouse roof steel mesh extends out of the left side of the warehouse roof concrete body to form a left-side extending end of the lower steel bars, and a left-side channel steel is welded and fixed between the left-side extending end of the upper steel bars and the left-side extending end of the lower steel bars.

[0017] Further, the rear end surface of the warehouse roof concrete body is a plane, the front end surface of the warehouse roof concrete body is a plane, the warehouse roof concrete body as a whole is trapezoidal, and the rear end of the longitudinal steel bars of the upper warehouse roof steel mesh of the warehouse roof reinforced framework extends out of the rear end of the warehouse roof concrete body into the inner recess of the inner recess step to form a longitudinal steel bar extending end.

[0018] The present application has the following advantages: in the present application, the warehouse roof body of the warehouse roof prefabricated unit adopts a flat structure without any curvature, and thus is easier to manufacture, store and use; the adjacent warehouse roof prefabricated units in the present application intersect at an obtuse angle, so that the entire warehouse roof has a fold plate type warehouse roof structure, which has greater rigidity and better mechanical properties than the arc plate warehouse roof in the prior art; the adjacent warehouse roof bodies cannot be butt-jointed as well as the arc-shaped warehouse roof in the prior art, and thus, in the present application, a left-side channel steel and a right-side channel steel with notched openings on opposite sides are arranged on the left and right sides of each warehouse roof body, when the adjacent warehouse roof bodies are connected, the right end of the lower channel steel leg of the right-side channel steel of the first warehouse roof prefabricated unit is in contact with and welded to the left end of the lower channel steel leg of the left-side channel steel of the second warehouse roof prefabricated unit, which not only ensures the connection strength of the bottom, but also ensures that the post-poured concrete body between the warehouse roof bodies will not leak when being poured, the connection between the upper side legs of the left-side channel steel and the right-side channel steel is achieved through the V-shaped connecting plate, so that a stable pouring cavity is formed between the left-side channel steel and the right-side channel steel, the post-poured concrete body between the warehouse roof bodies is poured in the pouring cavity, and perfect connection between the adjacent warehouse roof prefabricated units is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features and advantages of the present disclosure exemplary embodiments will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present disclosure are shown by way of example, and wherein like reference numerals refer to like elements throughout. In the drawings:

[0020] Figure 1 is a use state diagram of one embodiment of the assembled shallow round silo folded plate roof in the present application;

[0021] Figure 2 is a top view of Figure 1 ;

[0022] Figure 3 is a sectional view of 1-1 in Figure 2 ;

[0023] Figure 4 is a perspective view of Figure 1 ;

[0024] Figure 5 is a schematic diagram of the cooperation of two adjacent roof plates in Figure 1 ;

[0025] Figure 6 is an enlarged view of A in Figure 5 ;

[0026] Figure 7 is a sectional view of 7-7 in Figure 5 ;

[0027] Figure 8 is a schematic diagram of the connecting plate in Figure 5 ;

[0028] Figure 9 is a schematic diagram of the connecting plate in Figure 8 from another perspective;

[0029] Figure 10 is a top view of the upper ring beam in Figure 1 ;

[0030] Figure 11 is a front view of the upper ring beam in Figure 1 ;

[0031] Figure 12 is an enlarged view of B in Figure 11 ;

[0032] Figure 13 is a sectional view of 3-3 in Figure 10 ;

[0033] Figure 14 is an enlarged view of C in Figure 13 ;

[0034] Figure 15 is Figure 10 a sectional view along line 2-2 in Fig.

[0035] Figure 16 is Figure 1 a structural schematic diagram of the warehouse roof prefabricated unit in Fig.

[0036] Figure 17 is Figure 1 a top view of the connection between the warehouse roof prefabricated unit and the lower ring beam in Fig.

[0037] Figure 18 is Figure 17 an enlarged view of E in Fig.

[0038] Figure 19 is Figure 17 a sectional view along line 8-8 in Fig.

[0039] Figure 20 is a structural schematic diagram of the connection between the upper ring beam and the warehouse roof prefabricated unit in the top view direction;

[0040] Figure 21 Figure 20 is a sectional view along line 4-4 in Fig.

[0041] Figure 22 Figure 20 is a sectional view along line 5-5 in Fig.

[0042] Figure 23 Figure 20 is

[0043] Explanation of reference signs: 1, lower ring beam; 1-2, embedded screw rod; 1-3, inner concave step; 1-4, lower ring beam binding steel bar; 2, upper ring beam; 2-1, reinforcing rib plate; 2-2, reinforcing steel bar; 2-4, rib plate bolt through hole; 2-5, grouting port; 2-6, upper flange bolt through hole; 2-7, vertical bolt; 2-8, transverse bolt; 2-9, upper ring beam prefabricated concrete body; 2-10, upper flange plate; 2-11, middle web plate; 2-12, lower flange plate; 3, silo top plate prefabricated unit; 3-1, upper ring beam connecting bolt hole; 3-2, right side channel steel; 3-3, hollow sandwich; 3-4, hidden beam; 3-5, upper steel bar left side protruding end; 3-8, plate joint; 3-9, connecting plate; 3-11, upper steel bar right side protruding end; 3-12, left side channel steel; 3-13, silo top plate upper steel bar mesh; 3-14, silo top plate lower steel bar mesh; 3-15, longitudinal steel bar; 3-16, transverse steel bar; 3-17, lower steel bar right side protruding end; 3-18, lower steel bar left side protruding end; 3-19, silo top plate concrete body; 3-20, upper ring beam connecting channel steel; 3-21, lower ring beam connecting channel steel; 3-22, longitudinal steel bar protruding end; 5, post-poured concrete body between silo top plate and lower ring beam; 6, post-poured concrete body between silo top plates; 7, post-poured concrete body between silo top plate and upper ring beam. DETAILED DESCRIPTION

[0044] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0045] It should be noted that, unless otherwise defined, all technical and scientific terms used in the specification are the same as those commonly understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application.

[0046] An embodiment of an assembled shallow circular silo folded plate silo top in the present application is shown in Figures 1-23 The embodiment includes an upper ring beam 2, a lower ring beam 1, and a plurality of silo top plate prefabricated units 3 arranged in a circumferential sequence between the upper ring beam and the lower ring beam. In this embodiment, there are 16 silo top plate prefabricated units, and each silo top plate prefabricated unit forms a folded plate silo top structure with a small upper part and a large lower part.

[0047] The top plate of each bin is a prefabricated unit, which comprises a flat plate structure with a front narrow and rear wide bin top plate body. In this embodiment, the end of the bin top plate body close to the upper ring beam is called the front end, and the end of the bin top plate body close to the lower ring beam is called the rear end. The bin top plate body is fixed with left and right side channel steels 3-12 and 3-2 extending in the front-rear direction, with opposite notches. Each channel steel comprises an upper channel steel leg, a lower channel steel leg, and a channel steel waist connected between the upper and lower channel steel legs. The upper and lower channel steel legs are plate structures, and the plate surface extension direction of the upper and lower channel steel legs is consistent with the plate surface extension direction of the corresponding bin top plate.

[0048] In this embodiment, each bin top plate body comprises a bin top plate steel reinforcement framework and a bin top plate concrete body 3-19 integrally formed with the bin top plate steel reinforcement framework. The bin top plate steel reinforcement framework comprises a bin top plate upper side steel mesh 3-13 and a bin top plate lower side steel mesh 3-14. The bin top plate upper side steel mesh and the bin top plate lower side steel mesh each comprise longitudinal steel bars 3-15 extending in the front-rear direction and transverse steel bars 3-16 extending in the left-right direction. The bin top plate concrete body is an isosceles trapezoidal structure with a front narrow and rear wide.

[0049] The right end of the transverse steel bar of the bin top plate upper side steel mesh extends out of the right side of the bin top plate concrete body to form an upper side steel right side extension end 3-11. The right end of the transverse steel bar of the bin top plate lower side steel mesh extends out of the right side of the bin top plate concrete body to form a lower side steel right side extension end 3-17. The length of the upper side steel right side extension end is less than the length of the lower side steel right side extension end. The right side channel steel is welded and fixed between the upper side steel right side extension end and the lower side steel right side extension end. The left end of the transverse steel bar of the bin top plate upper side steel mesh extends out of the left side of the bin top plate concrete body to form an upper side steel left side extension end 3-5. The left end of the transverse steel bar of the bin top plate lower side steel mesh extends out of the left side of the bin top plate concrete body to form a lower side steel left side extension end 3-18. The length of the upper side steel left side extension end is less than the length of the lower side steel left side extension end. The left side channel steel is welded and fixed between the upper side steel left side extension end and the lower side steel left side extension end. In this application, the lengths of the upper side steel right side extension end and the upper side steel left side extension end are relatively short, which is more conducive to the smooth insertion of the left side channel steel and the right side channel steel between the corresponding upper side steel and lower side steel, and facilitates subsequent welding.

[0050] The first and second roof panel prefabricated units are defined as any two adjacent roof panel prefabricated units in the circumferential direction, the extending direction of the roof panel main panel surface of the first roof panel prefabricated unit intersects with the extending direction of the roof panel main panel surface of the second roof panel prefabricated unit to form an obtuse angle, the right lower channel steel leg end of the first roof panel prefabricated unit contacts with the left lower channel steel leg end of the second roof panel prefabricated unit and is welded to be connected, specifically, a V-shaped weld is formed between the right lower channel steel leg of the first roof panel prefabricated unit and the left lower channel steel leg of the second roof panel prefabricated unit, and the connection between the lower channel steel legs of the adjacent left and right channel steels is realized through the welding of the V-shaped weld.

[0051] The upper side steel legs of the right channel steel of the first roof panel prefabricated unit and the left channel steel of the second roof panel prefabricated unit are arranged in a spaced manner, a panel joint 3-8 is formed between the upper ends of the roof panel main bodies of the first and second roof panel prefabricated units, a plurality of inverted V-shaped connecting plates 3-9 are arranged between the upper side steel legs of the right channel steel of the first roof panel prefabricated unit and the left channel steel of the second roof panel prefabricated unit, and a roof panel interlayer post-poured concrete body 6 is poured between the right channel steel of the first roof panel prefabricated unit and the left channel steel of the second roof panel prefabricated unit.

[0052] Specifically, the inverted V-shaped connecting plate has two first and second plate bodies arranged in a cross manner, the first plate body is attached to the upper end of the upper side steel leg of the left channel steel and is welded to be connected with the left channel steel, and the second plate body is attached to the upper end of the upper side steel leg of the right channel steel and is welded to be connected with the right channel steel. A roof panel interlayer post-poured concrete body is poured between the left and right channel steels. The connecting plate can also be welded to be connected with the roof panel upper side steel bar mesh to form an integral whole through welding with the adjacent upper side steel bar right and left extending ends.

[0053] For the roof panel prefabricated unit, a hollow sandwich layer 3-3 is arranged in the roof panel main body, polystyrene is filled in the hollow sandwich layer, a plurality of concealed beams 3-4 extending in the left-right direction are fixed on the roof panel main body, the concealed beams 3-4 are made of channel steels and are welded to be integrated with the steel bar framework, and cement-based material is cast on the outer edge of the hollow sandwich layer to form an integral structure.

[0054] The lower ring beam in the embodiment is fixed to the upper end of the wall of the silo, and the inner side of the upper end of the ring beam has an annular inner recessed step 1-3. A vertically arranged embedded screw rod 1-2 is embedded in the lower ring beam, and the upper end of the embedded screw rod extends into the inner recessed step. The rear end of the left side channel steel and the right side channel steel is provided with a horizontally arranged lower ring beam connecting channel steel 3-21. The upper side steel leg and the lower channel steel leg of the lower ring beam connecting channel steel 3-21 are provided with lower ring beam connecting bolt holes for the embedded screw rod to pass through.

[0055] The rear end surface of the silo top plate concrete body is a plane, the front end surface of the silo top plate concrete body is a plane, the silo top plate concrete body as a whole is a trapezoid, the rear end of the longitudinal reinforcement of the upper side reinforcement mesh of the silo top plate reinforcement framework extends out of the rear end of the silo top plate concrete body into the inner recessed part of the inner recessed step to form a longitudinal reinforcement extension end 3-22, and the longitudinal reinforcement extension end 3-22 and the silo top plate-lower ring beam interval post-poured concrete body poured in the inner recessed step. When pouring the silo top plate-lower ring beam interval post-poured concrete, the corresponding positions need to be supported. In the embodiment, only the longitudinal reinforcement of the upper side reinforcement mesh of the silo top plate has a longitudinal reinforcement extension end. If the longitudinal reinforcement of the lower side reinforcement mesh of the silo top plate extends, the extension part is easy to interfere with the inner wall of the lower ring beam, which affects the normal hoisting of the silo top plate prefabricated unit.

[0056] The upper ring beam 2 is made of a ring-shaped I-beam, and the upper ring beam includes an upper flange plate 2-10, a lower flange plate 2-12, and an intermediate web plate 2-11 connected between the upper flange plate and the lower flange plate. The intermediate web plate is internally poured with an upper ring beam prefabricated concrete body 2-9 between the upper flange plate and the lower flange plate, and the intermediate web plate is externally welded with a plurality of circumferentially spaced reinforcing rib plates 2-1 between the upper flange plate and the lower flange plate. The front end of the left side channel steel and the right side channel steel is provided with a horizontally arranged upper ring beam connecting channel steel 3-20. The upper side steel leg of the upper ring beam connecting channel steel 3-20 is connected to the upper flange plate on the outer side of the intermediate web plate through a vertical bolt 2-7. The channel steel waist of the upper ring beam connecting channel steel is connected to the corresponding reinforcing rib plate 2-1 through a transverse bolt 2-8. A grouting port 2-5 is formed in the upper flange plate of the upper ring beam. The outer side of the intermediate web plate is poured with a silo top plate-upper ring beam interval post-poured concrete body between the upper flange plate, the lower flange plate, and the front end of the corresponding silo top prefabricated plate unit. In the figure, 2-4 represents a rib plate bolt through hole formed in the reinforcing rib plate for the transverse bolt to pass through.

[0057] In the embodiment, a plurality of circumferentially spaced reinforcing steel bars 2-2 are welded and fixed between the upper flange plate and the lower flange plate on the outer side of the intermediate web plate and between the upper flange plate and the lower flange plate on the inner side of the intermediate web plate. The reinforcing steel bars are vertically arranged.

[0058] The lower ring beam, the upper ring beam and the silo roof precast unit in the embodiment are prefabricated in the factory, in the on-site construction, firstly, the lower ring beam is fixed on the upper end of the silo wall, the upper ring beam is hoisted to a certain height, the concentricity of the upper ring beam and the lower ring beam is kept, when the upper ring beam is hoisted in place, firstly, four silo roof precast units are hoisted, the lower ring beam connecting bolt hole sleeve on the lower ring beam connecting channel steel of the silo roof precast unit is sleeved on the pre-buried bolt of the lower ring beam, the lower ring beam connecting bolt hole is a waist-shaped hole, and the longitudinal steel reinforcement extending end is lapped on the upper side of the step surface of the inner recessed step of the lower ring beam.

[0059] After the four silo roof precast units are hoisted, the height of the upper ring beam is slowly lowered, so that the upper flange plate of the upper ring beam falls on the upper ring beam connecting channel steel of the silo roof precast unit, and then the hoisting of the remaining twelve silo roof precast units is carried out.

[0060] After the hoisting of all the silo roof precast units is completed, the connection between the silo roof precast unit and the upper ring beam, the connection between the adjacent silo roof precast units and the connection between the lower ring beam and the silo roof precast unit are carried out. Firstly, the upper ring beam and the upper ring beam connecting channel steel of the silo roof precast unit are connected through horizontal bolts and vertical bolts, secondly, the connection between the adjacent silo roof precast units is carried out, specifically, the lower steel legs of the adjacent left channel steel and the right channel steel are welded first, then the upper steel legs of the left channel steel and the right channel steel are connected through the welding of the connecting plate, then the post-pouring concrete body between the adjacent left channel steel and the right channel steel is poured, and then the connecting plate is connected through the welding of the adjacent upper steel reinforcement left extending end and the upper steel reinforcement right extending end; finally, the post-pouring is carried out at the exposed positions of the upper steel reinforcement extending end of the adjacent silo roof precast units, the silo roof precast unit and the upper ring beam, the silo roof precast unit and the lower ring beam and the silo roof precast unit, to complete the pouring of the circumferential joint between the silo roof precast unit and the upper ring beam, the pouring of the inclined joint between the adjacent silo roof precast units and the pouring of the circumferential joint between the silo roof precast unit and the lower ring beam.

[0061] Compared with the prior art, the present application has the following advantages:

[0062] 1. The silo roof precast unit of the present application is a precast steel reinforced concrete hollow or solid flat plate, which can be produced on a platform mold in a general precast component factory, overcoming the shortcomings of traditional precast silo roof plates, such as high cost, difficulty, long production cycle and the like, which need special molds for production. The silo roof uses steel as the frame and hidden beam, improving the vertical bearing capacity, local bearing capacity and stiffness of the large-span silo roof structure, and at the same time, the steel structure connection method can be used for quick connection with adjacent components, thereby improving the assembly efficiency and reducing the construction difficulty.

[0063] 2. The upper ring beam of this invention is a steel-concrete composite beam with stiffening ribs and reinforcing bars inside, thereby improving the ease of construction of the precast slab unit on the silo roof and the upper ring beam, and improving the crack resistance of the composite beam. The inner ring concrete of the upper ring beam is precast in the factory, reducing the self-weight of the precast components and facilitating transportation and hoisting; the outer ring concrete of the upper ring beam is poured on site, improving the load-bearing capacity, stiffness, and integrity of the connection between the precast slab unit on the silo roof and the upper ring beam, effectively ensuring the airtightness and waterproofness of the silo roof structure.

[0064] 3. In this invention, the joint connection between adjacent prefabricated silo roof units is achieved by on-site fillet welding of the lower flanges (lower channel steel legs) of the channel steel on both sides of the slab, followed by pouring cement-based material. This utilizes a steel structure connection method for rapid connection with adjacent components. This improves assembly efficiency, reduces construction difficulty, and strengthens the joint connection between adjacent prefabricated silo roof units, enhancing the crack resistance and load-bearing capacity of the silo roof structure. The upper flanges (upper channel steel legs) of the channel steel are arranged in sections and welded on three sides using connecting plates, improving the crack resistance and local load-bearing capacity of the cement-based material, among other structural properties.

[0065] 4. The connection between the prefabricated silo roof slab unit and the upper ring beam in this invention adopts a steel structure connection method. Stiffening ribs and reinforcing bars are arranged inside the upper ring beam, and the silo roof slab uses structural steel as its frame. Fasteners are used at all contact surfaces. This improves assembly efficiency, reduces construction difficulty, and facilitates assembly, significantly reducing material usage, construction period, and construction costs. After the upper ring beam and silo roof slab are fastened together, the outer ring of the upper ring beam is then cast on-site, improving the load-bearing capacity, rigidity, and integrity of the connection between the silo roof slab and the upper ring beam, effectively ensuring the airtightness and waterproofness of the silo roof structure.

[0066] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0067] According to the above description of the present specification, those skilled in the art can also understand that the terms used such as "upper", "lower", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present specification, which are only for the purpose of facilitating the description of the present application and simplifying the description, and are not explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation, therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the technical solutions of the present application.

[0068] In addition, the terms "first" or "second" and the like used in the present specification are terms used to refer to numbers or ordinal numbers only for the purpose of description, and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" or "second" can explicitly or implicitly include at least one of the features. In the description of the present specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise explicitly and specifically limited.

[0069] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A prefabricated shallow circular silo roof with folded plates, comprising an upper ring beam, a lower ring beam, and a plurality of prefabricated roof slab units arranged sequentially along the circumference between the upper and lower ring beams, characterized in that: Each prefabricated silo roof unit includes a flat silo roof body with a narrow front and wide rear structure. The left and right sides of the silo roof body are fixed with opposing channel steels extending in the front-to-back direction. Each channel steel includes an upper channel steel leg, a lower channel steel leg, and a channel steel web connecting the upper and lower channel steel legs. The extension direction of the upper and lower channel steel legs is consistent with the extension direction of the corresponding silo roof body. Any two adjacent silo roof prefabricated units in the circumferential direction are defined as the first silo roof prefabricated unit and the second silo roof prefabricated unit, respectively. The extension direction of the silo roof body of the first silo roof prefabricated unit intersects the extension direction of the silo roof body of the second silo roof prefabricated unit at an obtuse angle. The right end of the lower channel steel leg of the right channel steel of the first silo roof prefabricated unit is connected to the first silo roof prefabricated unit. The lower channel steel leg of the left side of the precast roof slab unit of the second slab is connected to and welded together. The upper steel leg of the right side of the precast roof slab unit of the first slab is spaced apart from the upper steel leg of the left side of the precast roof slab unit of the second slab. Multiple inverted V-shaped connecting plates are spaced apart along the front-back direction between the upper steel leg of the right side of the precast roof slab unit of the first slab and the upper steel leg of the left side of the precast roof slab unit of the second slab. Post-cast concrete is poured between the right side of the precast roof slab unit of the first slab and the left side of the precast roof slab unit of the second slab. Define any two adjacent prefabricated roof slab units in the circumferential direction as the first prefabricated roof slab unit and the second prefabricated roof slab unit. The extension direction of the main body of the roof slab of the first prefabricated roof slab unit intersects the extension direction of the main body of the roof slab of the second prefabricated roof slab unit at an obtuse angle. A V-shaped weld is formed between the lower channel steel leg of the right channel steel of the first prefabricated roof slab unit and the upper end of the lower channel steel leg of the left channel steel of the second prefabricated roof slab unit. The connection between the lower channel steel legs of the adjacent left and right channel steels is achieved by welding the V-shaped weld. The spacing between the right and left channel steels gradually decreases from top to bottom.

2. The prefabricated shallow circular silo folding plate silo roof according to claim 1, characterized in that: Each silo roof slab includes a steel reinforcement cage and a concrete slab body cast integrally with the steel reinforcement cage. The steel reinforcement cage includes an upper steel reinforcement mesh and a lower steel reinforcement mesh. Both the upper and lower steel reinforcement meshes include longitudinal steel bars extending in the front-to-back direction and transverse steel bars extending in the left-to-right direction.

3. The prefabricated shallow circular silo folding plate silo roof according to claim 2, characterized in that: The right end of the transverse reinforcing bars of the upper reinforcing mesh of the silo roof slab extends from the right side of the silo roof slab concrete body to form the right end of the upper reinforcing bar. The right end of the transverse reinforcing bars of the lower reinforcing mesh of the silo roof slab extends from the right side of the silo roof slab concrete body to form the right end of the lower reinforcing bar. The right channel steel is welded and fixed between the right end of the upper reinforcing bar and the right end of the lower reinforcing bar. The left end of the transverse reinforcing bars of the upper reinforcing mesh of the silo roof slab extends from the left side of the silo roof slab concrete body to form the left end of the upper reinforcing bar. The left end of the transverse reinforcing bars of the lower reinforcing mesh of the silo roof slab extends from the left side of the silo roof slab concrete body to form the left end of the lower reinforcing bar. The left channel steel is welded and fixed between the left end of the upper reinforcing bar and the left end of the lower layer reinforcing bar.

4. The prefabricated shallow circular silo folding plate silo roof according to claim 2, characterized in that: The rear end face of the silo roof concrete is flat, the front end face of the silo roof concrete is flat, the silo roof concrete as a whole is trapezoidal, the inner side of the lower ring beam has an annular concave step, the rear end of the longitudinal steel bar of the upper steel mesh of the silo roof concrete skeleton extends from the rear end of the silo roof concrete into the concave part of the concave step to form the longitudinal steel bar extension end, and the longitudinal steel bar extension end and the concave step are filled with post-cast concrete between the silo roof slab and the lower ring beam.

5. The prefabricated shallow circular silo folding plate silo roof according to claim 4, characterized in that: The lower ring beam has pre-embedded vertically arranged pre-embedded screws that extend into the concave step. The rear ends of the left and right channel steels are provided with horizontally arranged lower ring beam connecting channel steels. The upper steel leg and lower channel steel leg of the lower ring beam connecting channel steel are provided with lower ring beam connecting bolt holes for the pre-embedded screws to pass through.

6. The prefabricated shallow circular silo folding plate silo roof according to any one of claims 1 to 5, characterized in that: The upper ring beam is made of H-beams with a ring structure. The upper ring beam includes an upper flange plate, a lower flange plate, and an intermediate web plate connecting the upper flange plate and the lower flange plate. The inner side of the intermediate web plate and the upper flange plate and the lower flange plate are filled with precast concrete of the upper ring beam. The outer side of the intermediate web plate and the upper flange plate and the lower flange plate are welded and fixed with multiple reinforcing ribs arranged circumferentially. The front ends of the left channel steel and the right channel steel are provided with horizontally arranged upper ring beam connecting channel steels. The upper steel leg of the upper ring beam connecting channel steel is connected to the upper flange plate on the outer side of the intermediate web plate by vertical bolts. The web of the upper ring beam connecting channel steel is connected to the corresponding reinforcing rib plate by transverse bolts. The outer side of the intermediate web plate and the upper flange plate, the lower flange plate and the front end of the corresponding precast slab unit of the slab roof are filled with post-cast concrete between the slab roof plate and the upper ring beam.

7. The prefabricated shallow circular silo folding plate silo roof according to claim 6, characterized in that: Multiple reinforcing bars are welded and fixed between the upper and lower flange plates on the outer side of the intermediate web and between the upper and lower flange plates on the inner side of the intermediate web. The reinforcing bars are arranged vertically.

8. A prefabricated slab unit for the roof of a prefabricated shallow circular silo with folded plates, characterized in that: The main body of the silo roof is a flat plate structure that is narrow at the front and wide at the back. On the left and right sides of the main body of the silo roof, there are left and right channel steels with opposite slots extending in the front-back direction. Each channel steel includes an upper channel steel leg, a lower channel steel leg, and a channel steel web connecting the upper and lower channel steel legs. The extension direction of the upper and lower channel steel legs is consistent with the extension direction of the corresponding silo roof plate.

9. The precast slab unit for warehouse roof according to claim 8, characterized in that: Each silo roof slab consists of a steel reinforcement cage and a concrete slab body cast integrally with the steel reinforcement cage. The steel reinforcement cage includes an upper steel reinforcement mesh and a lower steel reinforcement mesh. Both the upper and lower steel reinforcement meshes include longitudinal steel bars extending in the front-to-back direction and transverse steel bars extending in the left-to-right direction. The right end of the transverse steel bars of the upper steel reinforcement mesh extends from the right side of the concrete slab body to form the right end of the upper steel bar. The right end of the transverse steel bars of the lower steel reinforcement mesh extends from the right side of the concrete slab body to form the right end of the lower steel bar. A right-side channel steel is welded and fixed between the right end of the upper steel bar and the right end of the lower steel bar. The left end of the transverse steel bars of the upper steel reinforcement mesh extends from the left side of the concrete slab body to form the left end of the upper steel bar. The left end of the transverse steel bars of the lower steel reinforcement mesh extends from the left side of the concrete slab body to form the left end of the lower steel bar. A left-side channel steel is welded and fixed between the left end of the upper steel bar and the left end of the lower layer steel bar.

10. The precast slab unit for warehouse roof according to claim 9, characterized in that: The rear end face of the silo roof concrete is flat, the front end face of the silo roof concrete is flat, the silo roof concrete as a whole is trapezoidal, and the rear end of the longitudinal steel bar of the upper steel mesh of the silo roof concrete steel reinforcement skeleton extends from the rear end of the silo roof concrete into the concave part of the concave step to form the longitudinal steel bar protrusion end.

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