Reinforced concrete conical roof formwork supporting device

Abstract

The reinforced concrete conical roof formwork supporting device comprises a center column set, bailey truss supporting structures, annular surrounding purlins, a formwork supporting frame body and an annular bin wall, the bottom of the center column set is fixed to the ground through a center column rectangular foundation, and the upper end of the center column set is connected with the multiple bailey truss supporting structures which are arranged in a radiation mode; the center column set is covered with the annular silo wall, the other end of the bailey truss supporting structure is erected on the upper portion of the annular silo wall through the embedded support, the bailey truss supporting structure is provided with a plurality of annular surrounding purlins distributed at intervals, and the formwork body is erected on the upper portion of the bailey truss supporting structure. The Bailey truss has the beneficial effects that modular design is adopted, the Bailey truss and the center column are standard components and can be rapidly disassembled and assembled, and the turnover rate reaches 98%; according to the high-bearing-capacity structure, the center column transmits vertical loads to the foundation, the bailey truss disperses horizontal force, and the overall deformation of the supporting platform is smaller than or equal to 3 m; green construction is achieved, and material waste is reduced due to the fact that blind tenons and detachable steel members are embedded.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, in particular to a reinforced concrete conical roof formwork support device. Background Art

[0002] The traditional shallow silo roof formwork support system has the following problems:

[0003] 1. Full-frame support system: large investment in frame materials, high cost, long construction period, and many safety hazards in high-altitude construction.

[0004] 2. High-altitude Bailey support system: holes need to be reserved in the warehouse wall, which weakens the structural strength, makes the repair process complicated, and has poor economic efficiency.

[0005] 3. Umbrella-shaped steel truss support system: lack of standardized design, high risk of demolition and insufficient stability.

[0006] Therefore, it is necessary to propose a reinforced concrete conical roof formwork supporting device for the above-mentioned problems. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a reinforced concrete conical roof formwork support device to solve the above-mentioned problems.

[0008] A reinforced concrete conical roof formwork support device comprises a central column group, a Bailey frame support structure, an annular perimeter purlin, a formwork frame body and an annular warehouse wall, wherein the bottom of the central column group is fixed to the ground through a central column rectangular foundation, the upper end of the central column group is connected to a plurality of radially arranged Bailey frame support structures, the annular warehouse wall covers the outside of the central column group, the other end of the Bailey frame support structure is mounted on the upper part of the annular warehouse wall through an embedded support, the Bailey frame support structure is provided with a plurality of spaced annular perimeter purlins, and the formwork frame body is mounted on the upper part of the Bailey frame support structure.

[0009] Preferably, the central column group includes a central steel column and an annular central support, and the annular central support is installed on the upper part of the central steel column.

[0010] Preferably, a plurality of steel cables are anchored between the central steel column and the ground, and a spiral climbing ladder is provided on the circumference of the central steel column.

[0011] Preferably, a horizontal net is laid on the upper part of the annular purlin.

[0012] Preferably, the Bailey frame support structure is connected to the annular purlin by using U-bolts.

[0013] Preferably, a plurality of annularly distributed cantilever protection outer frames are provided on the upper circumference of the annular warehouse wall.

[0014] Preferably, a horizontal safety net is laid on the formwork support frame and the cantilever scaffold protection outer scaffold.

[0015] Preferably, reinforcing bar mesh is provided on both the inner wall and the outer wall of the central steel column.

[0016] Preferably, a number of annular purlins are fixed in position by vertical poles.

[0017] Preferably, the annular purlins are made of I-beams and the vertical poles are made of steel pipes.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: Modular design: The Bailey truss and the central column adopt standardized components, which can be quickly disassembled and assembled, and the turnover rate reaches 98%; High-load-bearing structure: The central column transfers the vertical load to the foundation, and the Bailey truss disperses the horizontal force, and the overall deformation of the support platform is ≤3m; Green construction: Embedded tenons and detachable steel components reduce material waste.

[0019] Through the reasonable design and combination of components such as the central column group, the Bailey truss support structure, the annular purlin, the formwork support frame and the annular bin wall, the present invention forms a stable and reliable formwork support system. The central column group is fixed on the ground through the central column rectangular foundation to provide a stable foundation; the Bailey truss support structure is arranged radially to effectively disperse the load; the annular bin wall enhances the overall stability; the annular purlin strengthens the Bailey truss support structure and provides a foundation for the formwork support frame, so that the entire support device can meet the load-bearing and stability requirements during the construction of the reinforced concrete conical roof. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 and Figure 2 are the structural diagrams of the present invention;

[0021] Figure 3 is the top view structural schematic diagram of the present invention;

[0022] Figure 4 is the upper partial schematic diagram of the present invention;

[0023] Figure 5 is the lower partial schematic diagram of the present invention;

[0024] Figure 6 is the structural schematic diagram of the central column group of the present invention;

[0025] Figure 7 is the cross-sectional structural schematic diagram of the central steel column of the present invention.

[0026] Reference numerals in the drawings: 1. Central column group; 2. Bailey truss support structure; 3. Ring-shaped purlin; 4. Formwork support body; 5. Ring-shaped bin wall; 6. Central column rectangular foundation; 7. Ground; 8. Embedded support; 9. Central steel column; 10. Ring-shaped central support; 11. Steel wire rope; 12. Spiral climbing ladder; 13. Horizontal safety net; 14. Protective external frame for cantilever scaffold; 15. Reinforcement mesh; 16. First reinforcing rib plate; 17. Second reinforcing rib plate; 18. Vertical pole; 19. Bin cover. Detailed implementation manners

[0027] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "central", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0030] The embodiments of the present invention will be described in detail below with reference to the drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0031] As Figure 1 And in combination with Figures 2 to 7As shown in the figure, a formwork support device for a reinforced concrete conical roof includes a central column group 1, a Bailey truss support structure 2, an annular purlin 3, a formwork support body 4, and an annular bulkhead 5. The bottom of the central column group 1 is fixed to the ground 7 through a central column rectangular foundation 6. The upper end of the central column group 1 is connected with a number of radially arranged Bailey truss support structures 2. The annular bulkhead 5 covers the outside of the central column group 1. The other end of the Bailey truss support structure 2 is erected on the upper part of the annular bulkhead 5 through a pre-embedded support 8. The Bailey truss support structure 2 is provided with a number of annular purlins 3 spaced apart. The formwork support body 4 is erected on the upper part of the Bailey truss support structure 2. Workers build the silo cover 19 on the support formwork 4.

[0032] Further, the central column group 1 includes a central steel column 9 and an annular central support 10. The annular central support 10 is installed on the upper part of the central steel column 9.

[0033] The beneficial effect of adopting the above technical solution: The annular central support 10 provides a stable connection point for the Bailey truss support structure 2, facilitating the installation and fixation of the Bailey truss support structure 2, improving the reliability and stability of the connection between the central column group 1 and the Bailey truss support structure 2, and thus ensuring the structural stability of the entire support device.

[0034] Further, a number of steel wire ropes 11 are anchored between the central steel column 9 and the ground 7. A spiral climbing ladder 12 is arranged on the circumferential part of the central steel column 9.

[0035] The beneficial effect of adopting the above technical solution: The steel wire ropes 11 are anchored between the central steel column 9 and the ground 7, enhancing the stability of the central steel column 9 and preventing it from tilting or shaking due to external forces during construction. The spiral climbing ladder 12 arranged on the circumferential part facilitates the construction personnel to climb up and down the central steel column 9, improving the convenience of construction and ensuring the safety of the construction personnel during the up and down process.

[0036] Further, a horizontal safety net 13 is laid on the upper part of the annular purlin 3.

[0037] The beneficial effect of adopting the above technical solution: Laying the horizontal safety net 13 on the upper part of the annular purlin 3 can effectively prevent tools, materials, etc. from falling from a height during construction, avoid causing harm to the construction personnel below, and greatly improve the safety during construction.

[0038] Further, the Bailey truss support structure 2 and the annular purlin 3 are connected by U-bolts.

[0039] Beneficial effects of adopting the above technical solution: The Bailey truss support structure 2 and the annular girt 3 are connected by U-bolts. The connection method is firm and reliable, which can ensure the connection strength between the two and guarantee the effective transfer of loads. At the same time, the U-bolts are convenient to disassemble, facilitating the installation, adjustment and disassembly of the support device according to the actual situation during the construction process, thus improving the construction efficiency.

[0040] Further, a number of cantilever frame protection outer frames 14 are annularly distributed on the upper circumferential part of the annular silo wall 5.

[0041] Beneficial effects of adopting the above technical solution: The cantilever frame protection outer frame 14 is arranged on the upper circumferential part of the annular silo wall 5, providing a safety protection barrier for construction workers to carry out construction operations around the annular silo wall 5, preventing construction workers from falling due to accidental slips, and ensuring the personal safety of construction workers when constructing around the annular silo wall 5.

[0042] Further, horizontal safety nets are laid on the formwork support body 4 and the cantilever frame protection outer frame 14.

[0043] Beneficial effects of adopting the above technical solution: Further strengthen the safety protection of construction workers and the construction area, effectively prevent people and objects from falling from height, reduce the safety risks during the construction process, and create a safer construction environment.

[0044] Further, reinforcing mesh 15 is provided on both the inner wall and the outer wall of the central steel column 9.

[0045] Beneficial effects of adopting the above technical solution: Enhance the strength and stiffness of the central steel column 9, improve its bearing capacity, enable the central steel column to better bear the loads transmitted by the roof, and ensure the structural stability and safety of the entire support device.

[0046] A first reinforcing rib plate 16 is provided between the bottom of the central steel column 9 and the central column rectangular foundation 6, and a second reinforcing rib plate 17 is provided between the bottom of the central steel column 9 and the annular central support 10.

[0047] Further, a number of annular girts 3 are fixed in position by vertical rods.

[0048] Beneficial effects of adopting the above technical solution: The vertical rods 18 are fixed in position, ensuring the accurate position of the annular girts, making the annular girts evenly distributed on the Bailey truss support structure, enhancing the connection stability between the annular girts, and further improving the overall stability and bearing capacity of the Bailey truss support structure.

[0049] Further, the annular girt 3 is made of I-beam, and the vertical rod is made of steel pipe.

[0050] Beneficial effects of adopting the above technical solutions: The high strength and stiffness of the I-beam can meet the load-bearing requirements of the support device during construction, ensuring the stability of the support device; the vertical poles are made of steel pipes, and due to the characteristics of light weight, easy processing and installation of steel pipes, it facilitates the operation of construction workers, improves construction efficiency, and reduces construction costs at the same time.

[0051] Compared with the prior art, the beneficial effects of the present invention are as follows: Block design: The Bailey truss and the central column adopt standardized components, which can be quickly disassembled and assembled, and the turnover rate reaches 98%; High-load-bearing structure: The central column transfers the vertical load to the foundation, and the Bailey truss disperses the horizontal force, and the overall deformation of the support platform ≤ 3m; Green construction: Embedded tenons and detachable steel components reduce material waste.

[0052] 1. Central column assembly 1: It is composed of multiple sections of standard steel columns (Φ800mm, wall thickness 16mm) connected by flange bolts, fixed at the bottom to the in-warehouse slab foundation (4m×4m×1m, C35 concrete with steel reinforcement), and provided with a ring-shaped steel beam support at the top;

[0053] 2. Bailey truss support structure 2: 30 Bailey trusses (321-type standard Bailey sheets) arranged radially around the central column, with both ends connected to the ring-shaped support at the top of the central column and the in-warehouse wall embedded support (fixed by embedded tenons + M24 bolts);

[0054] 3. Ring-shaped purlin 3: 10# I-beams laid on the upper chords of the Bailey trusses, with a spacing ≤ 900mm, fixed to the Bailey trusses by U-bolts (Φ20mm);

[0055] 4. Formwork support body 4: A full hall scaffold erected with Φ48.3×2.7mm steel pipes, with a vertical pole spacing ≤ 900mm, supplemented by radial and circumferential scissors braces;

[0056] 5. Safety protection components: including a horizontal safety net (fully laid on the I-beam and the formwork support), guy ropes ( steel wire ropes fixing the central column), and hanging points for construction workers' safety belts.

[0057] Example 1: Support for the conical roof of a medium-scale storage building

[0058] For a certain grain storage project, the bottom diameter of the concrete conical roof is 20m and the height is 8m, used for a circular silo with a capacity of 5000 tons.

[0059] Central column group 1:

[0060] Central steel column 9: Adopt 3 sections of Q345B steel columns with Φ800mm and wall thickness 16mm, connected by flanges (M24 bolts), with a total height of 10m, and fixed at the bottom to the C35 concrete central column rectangular foundation 6 with dimensions of 4m×4m×1m.

[0061] Ring-shaped central support 10: It is formed by welding a steel plate with a diameter of 2.5 m and a thickness of 20 mm, and is connected to the top flange of the central steel column through 12 groups of M24 bolts.

[0062] Reinforcing structure: 8 groups of first reinforcing rib plates 16 (10 mm steel plates, 45° diagonal braces) are set at the bottom, and 6 groups of second reinforcing rib plates 17 (12 mm steel plates, evenly distributed in a ring) are set between the top and the ring-shaped support.

[0063] Bailey truss support structure 2:

[0064] 30 standard Bailey trusses of type 321 are arranged radially (spacing 1.2°), with a single truss length of 15 m. The two ends are respectively connected to the ring-shaped central support 10 and the top embedded support 8 (embedded tenon depth 200 mm) of the ring-shaped bin wall 5 through M24 bolts.

[0065] Horizontal force transfer: 10# I-beam ring girders 3 are set on the upper chord of the Bailey truss, with a spacing of 900 mm, and fixed through Φ20 mm bolts to form a continuous support system.

[0066] Formwork support and safety protection

[0067] Formwork support frame 4: A full hall frame is erected using Φ48.3×2.7 mm steel pipes, with a vertical rod spacing of 900 mm×900 mm. Diagonal braces are set circumferentially and radially (spacing 6 m), and 15 mm thick wooden formwork is laid on the top.

[0068] Safety measures: The ring girder 3 and the formwork support frame (4) are fully covered with horizontal safety nets (13) (mesh size ≤ 50 mm); the central steel column 9 is tied to the ground anchor pile (burial depth 1.5 m) through 8 steel wire ropes 11, and a protective handrail (height 1.2 m) is set on the spiral climbing ladder 12.

[0069] Construction technology

[0070] Foundation construction: Pour the rectangular foundation 6 of the central column, and the positioning error of the embedded support 8 ≤ 5 mm.

[0071] Central column installation: The steel column is hoisted in sections. After correcting the verticality (deviation ≤ H / 1000), the reinforcing rib plates are welded.

[0072] Bailey truss erection: The Bailey trusses are installed one by one from the center to the bin wall, and the tightening torque of the U-bolts reaches 80 N·m.

[0073] Formwork support and protection: The formwork support frame and safety protection facilities are erected synchronously, and the overlapping width of the horizontal safety net ≥ 300 mm.

[0074] Example 2: Support for the conical roof of a large industrial building

[0075] A chemical raw material storage depot, with a concrete conical roof having a bottom diameter of 30 m and a height of 12 m, needs to withstand the typhoon load of level 12 in the coastal area.

[0076] Central column group 1:

[0077] Central steel column 9: It adopts 4 sections of Q390B steel columns with a diameter of Φ1000 mm and a wall thickness of 20 mm, with a total height of 15 m. The bottom is fixed to a C40 concrete foundation 6 with a size of 6 m×6 m×1.5 m. The inner wall / outer wall is welded with a reinforcing bar mesh 15 of Φ12 mm (mesh 200 mm×200 mm).

[0078] Ring-shaped central support 10: With a diameter of 3.5 m, it is integrally formed by a cast steel part and is connected to the steel column through 16 groups of M30 bolts. The surface of the support is provided with anti-slip tooth patterns.

[0079] Bailey truss support structure 2

[0080] Radiate and arrange 40 strengthened Bailey sheets (spacing 0.9°), with a single sheet length of 20 m. The two ends are connected to the support by high-strength bolts (10.9 grade M30); 14# I-beams are added as transverse connecting rods under the lower chord of the Bailey truss (spacing 3 m) to improve the overall stability.

[0081] Ring-shaped purlin 3: It adopts 12# I-beams with a spacing of 800 mm and is fixed to the upper chord of the Bailey truss through double U-shaped bolts (Φ24 mm). Steel pipe vertical poles 18 (Φ60×3.5 mm) are set at the mid-span for auxiliary support (spacing 1.2 m).

[0082] Formwork support and safety protection

[0083] Formwork support frame 4: The spacing of the vertical poles is 800 mm×800 mm, and double-way diagonal braces (angle 45°) are set. 18 mm thick bamboo plywood is laid on the top; The cantilevered protective outer frame 14 is Constructed with steel pipes, with a height of 1.5 m, and fully covered with dense mesh safety nets.

[0084] Wind resistance measures: The central steel column 9 is tied by 12 Steel wire ropes (11) (pre-tension 50 kN), and diagonal braces are added to the outer frame of the cantilevered shelf at the top of the ring-shaped bin wall 5 (angle with the bin wall 60°).

[0085] Construction technology

[0086] Deepening design: Use BIM technology to pre-assemble the central column and the Bailey truss, and optimize the details of the node connection.

[0087] High-precision installation: Use a total station to calibrate the verticality of the central column (deviation ≤ 3 mm), and control the elevation error of the Bailey truss within ±5 mm.

[0088] Load test: Before formwork erection, a loading test on the Bailey truss (1.5 times the design load) was carried out, and the monitored deformation was ≤ 15 mm (meeting the requirement of overall deformation ≤ 30 mm).

[0089] Green construction: The embedded bearing 8 adopts a detachable hidden tenon (recovery rate 95%), and the Bailey truss and steel members are painted with an environmentally friendly anti-corrosion coating (salt spray resistance ≥ 1000 h).

[0090] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A reinforced concrete conical roof formwork support device, characterized in that: The invention comprises a central column group (1), a Bailey frame support structure (2), an annular surrounding purlin (3), a formwork frame body (4) and an annular warehouse wall (5); the bottom of the central column group (1) is fixed on the ground (7) through a central column rectangular foundation (6); the upper end of the central column group (1) is connected to a plurality of radially arranged Bailey frame support structures (2); the annular warehouse wall (5) covers the outside of the central column group (1); the other end of the Bailey frame support structure (2) is erected on the upper part of the annular warehouse wall (5) through a pre-buried support (8); the Bailey frame support structure (2) is provided with a plurality of spaced annular surrounding purlins (3); and the formwork frame body (4) is erected on the upper part of the Bailey frame support structure (2).

2. A reinforced concrete conical roof formwork support device as claimed in claim 1, characterized in that: The central column group (1) comprises a central steel column (9) and an annular central support (10), wherein the annular central support (10) is installed on the upper part of the central steel column (9).

3. A reinforced concrete conical roof formwork support device as claimed in claim 2, characterized in that: A plurality of steel wire ropes (11) are anchored between the central steel column (9) and the ground (7), and a spiral climbing ladder (12) is arranged on the circumference of the central steel column (9).

4. A reinforced concrete conical roof formwork support device as claimed in claim 1, characterized in that: The upper part of the annular surrounding purlin (3) is paved with a horizontal net (13).

5. A reinforced concrete conical roof formwork support device as claimed in claim 1, characterized in that: The Bailey frame support structure (2) and the annular surrounding purlin (3) are connected by U-shaped bolts.

6. A reinforced concrete conical roof formwork support device as claimed in claim 1, characterized in that: The upper circumferential portion of the annular warehouse wall (5) is provided with a plurality of annularly distributed cantilever protection outer frames (14).

7. A reinforced concrete conical roof formwork support device as claimed in claim 1, characterized in that: The formwork support frame (4) and the cantilever frame protection outer frame (14) are paved with a horizontal net (13).

8. A reinforced concrete conical roof formwork support device as claimed in claim 2, characterized in that: The inner wall and the outer wall of the central steel column (9) are both provided with reinforcing rib nets (15).

9. A reinforced concrete conical roof formwork support device as claimed in claim 1, characterized in that: A plurality of annular surrounding purlins (3) are positioned and fixed by vertical rods (18).

10. A reinforced concrete conical roof formwork support device as claimed in claim 9, characterized in that: The annular surrounding purlin (3) is made of I-beam, and the vertical pole (18) is made of steel pipe.

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