Fabricated anti-explosion roof panel using UHPC (Ultra High Performance Concrete) and manufacturing method thereof

Abstract

The invention relates to a fabricated anti-explosion roof panel using UHPC concrete and a manufacturing method thereof.The fabricated anti-explosion roof panel comprises a UHPC concrete plate and a high-strength concrete plate which are vertically arranged at an interval, a buffer cavity is formed between the UHPC concrete plate and the high-strength concrete plate, and a plurality of steel pipes sequentially arranged in the left-right direction are arranged in the buffer cavity; the length of the steel pipes extends in the front-back direction, a connecting plate is arranged between every two corresponding adjacent steel pipes, buffer springs with the axes extending in the up-down direction are arranged on the connecting plates, the upper ends of the steel pipes are in force transmission fit with the bottom of the UHPC concrete plate, the lower ends of the steel pipes are in force transmission fit with the upper end of the high-strength concrete plate, and the steel pipes are filled with first anti-explosion fibers. And the peripheries of the steel pipes and the buffer springs in the buffer cavity are filled with a rock wool buffer layer. According to the fabricated anti-explosion roof panel using the UHPC, the anti-explosion strength can be guaranteed, and the situation that the weight of the roof panel is too heavy due to the fact that high-strength concrete is independently used can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building construction, and in particular to a prefabricated explosion-proof roof panel using UHPC concrete. Background Art

[0002] Explosion-proof roof panels belong to the field of construction engineering, especially in the application of explosion-proof technology, which involves the use of specially designed roof panels in building structures to cope with explosion shock and other high-pressure situations. The main purpose of explosion-proof roof panels is to ensure that when an explosion occurs outside the building, the roof can withstand the shock wave, pressure changes and possible fire hazards generated by the explosion, thereby ensuring the stability and safety of the building structure.

[0003] This technology is usually used in buildings in high-risk places such as petrochemical, military, and mining to prevent greater damage and casualties when accidents occur. In the existing technology, explosion-proof roof panels usually use reinforced concrete, steel structures, or composite materials to improve the explosion resistance of the roof. Although various existing technologies have achieved explosion-proof functions to a certain extent, they also have deficiencies and defects to varying degrees.

[0004] For example, 1. A simple reinforced concrete roof usually improves its explosion resistance by strengthening the steel bar configuration and concrete thickness. It has high compressive strength and can withstand explosion impacts of a certain intensity. However, reinforced concrete roofs have the disadvantages of being heavy, difficult to construct, and likely to crack or collapse in the face of high-intensity explosions.

[0005] 2. For steel structure roofs, steel structure roofs use steel as the main structural material, which has good earthquake resistance and relatively light weight. However, steel is prone to yielding and deformation under high-intensity explosion impact, and may be difficult to maintain in the long term, especially in extreme environments, its corrosion resistance and explosion resistance may be affected.

[0006] 3. For roofs made of compliant materials, composite materials (such as carbon fiber reinforced plastic CFRP, glass fiber reinforced plastic GFRP, etc.) are used in explosion-proof roof designs. These materials have good corrosion resistance and lightweight advantages, but when faced with high-intensity explosion impacts, the impact resistance and fire resistance of composite materials are limited, and they cannot provide sufficient protection, and may require more frequent maintenance.

[0007] In summary, the explosion-proof roof panels in the prior art mainly have the following problems and shortcomings: 1. Limited explosion-proof performance: Most existing roofing materials still have insufficient explosion-proof performance when facing high-intensity explosion impacts. The roof panels may crack and collapse under the impact of strong explosions, causing serious damage to the overall structure of the building.

[0008] 2. Heavy weight: For example, reinforced concrete roofs are heavy, which increases the overall burden on the building. Especially in high-rise buildings, higher requirements are placed on the foundation's bearing capacity and the construction difficulty increases.

[0009] 3. Long maintenance cycle and high cost: Existing roof panel materials (such as steel structures and composite roofs) are susceptible to corrosion, aging, etc. during long-term use, and the explosion-proof effect gradually decreases, resulting in the need for frequent inspections and maintenance, which increases maintenance costs and workload.

[0010] 4. High cost: Although some high-performance materials (such as special steels, carbon fiber composites, etc.) have improved explosion-proof performance, these materials are expensive, resulting in excessively high overall manufacturing costs, limiting their application in cost-sensitive projects. Summary of the invention

[0011] The object of the present invention is to provide an assembled explosion-proof roof panel using UHPC concrete which can ensure explosion-proof strength and avoid excessive weight of the roof panel caused by using high-strength concrete alone.

[0012] In order to solve the above technical problems, a technical solution of an assembled explosion-proof roof panel using UHPC concrete is as follows: An assembled explosion-proof roof panel using UHPC concrete comprises a UHPC concrete slab and a high-strength concrete slab which are arranged at intervals up and down, a buffer cavity is provided between the UHPC concrete slab and the high-strength concrete slab, a plurality of steel pipes which are arranged sequentially in the left-right direction are provided in the buffer cavity, the length of the steel pipes is extended in the front-back direction, a connecting plate is provided between two corresponding adjacent steel pipes, a buffer spring whose axis extends in the up-down direction is provided on the connecting plate, the upper end of the steel pipe cooperates with the bottom of the UHPC concrete slab for force transmission, the lower end of the steel pipe cooperates with the upper end of the high-strength concrete slab for force transmission, the steel pipe is filled with a first explosion-proof fiber, and a rock wool buffer layer is filled around the steel pipe and the buffer spring in the buffer cavity.

[0013] Furthermore, the high-strength concrete slab has an upwardly notched mounting groove, the high-strength concrete slab comprises a bottom wall and side walls arranged around the bottom wall, the lower end of the steel pipe cooperates with the upper end of the bottom wall for force transmission, the inner sides of the four side walls are protruded with reserved steel bars, the reserved steel bars are connected to the steel frame of the high-strength concrete slab, and the steel frame of the UHPC concrete slab is connected to the corresponding reserved steel bars.

[0014] Furthermore, a second explosion-proof fiber layer is laid between the bottom of the steel pipe and the high-strength concrete slab, and the second explosion-proof fiber layer is fixed to the high-strength concrete slab by vertical bolts.

[0015] Furthermore, any two adjacent steel pipes are connected via the connecting plate.

[0016] Furthermore, a vertical steel column connected to the high-strength concrete slab is fixed to the lower side of the connecting plate.

[0017] Furthermore, the steel pipes are arranged into a plurality of steel pipe groups along the left-right direction, each steel pipe group includes two steel pipes spaced apart from each other, and the two steel pipes in each steel pipe group are connected by the connecting plate.

[0018] Furthermore, a buffer plate for contacting and cooperating with the bottom of the UHPC concrete slab is provided at the upper end of the buffer spring, and the diameter of the buffer plate is larger than the diameter of the buffer spring.

[0019] Furthermore, a connecting plate guide hole is opened on the connecting plate, and a guide rod located on the inner side of the buffer spring is fixed on the buffer plate. The bottom of the guide rod has a guide section for guiding and moving with the connecting plate guide hole, and the guide rod has a pressing shoulder on the upper side of the guide section for pressing the connecting plate downward.

[0020] Furthermore, a second explosion-proof fiber layer is laid between the bottom of the steel pipe and the high-strength concrete slab, and the second explosion-proof fiber layer is fixed to the high-strength concrete slab by vertical bolts. The vertical bolts are located on the lower side of the corresponding guide rods, and the upper ends of the vertical bolts are spaced apart from the bottom of the guide rods. The top height of the vertical bolts is higher than the second explosion-proof fiber layer, and the top of the vertical bolts is used to push against the bottom of the guide rod to limit the downward movement limit of the guide rod.

[0021] The technical solution of the method for manufacturing the assembled explosion-proof roof panel in the present invention is: The method comprises the following steps: a first step, casting a high-strength concrete slab, the high-strength concrete slab is a U-shaped structure with an opening facing upward, the high-strength concrete slab comprises a bottom wall and side walls arranged on the left and right sides of the bottom wall, the opposite sides of the two side walls are protruding with reserved steel bars, and the reserved steel bars are connected to the steel skeleton of the high-strength concrete slab; a second step, laying a second explosion-proof fiber layer on the upper side of the bottom wall of the high-strength concrete slab, and fixing the second explosion-proof fiber layer on the bottom wall by vertical bolts; a third step, arranging steel pipes on the upper side of the second explosion-proof fiber layer, the steel pipes are arranged into a plurality of steel pipe groups in the left and right directions, each steel pipe group comprises two steel pipes arranged at intervals on the left and right, and the two steel pipes of each steel pipe group are connected by a connecting plate, a buffer spring with an axis extending in the up-down direction is arranged on the connecting plate, a buffer plate for contacting and cooperating with the bottom of the UHPC concrete slab is arranged on the upper end of the buffer spring, the diameter of the buffer plate is larger than the diameter of the buffer spring, and a connecting plate is provided on the connecting plate A guide hole, a guide rod located inside the buffer spring is fixed on the buffer plate, the bottom of the guide rod has a guide section for guiding and moving with the guide hole of the connecting plate, the guide rod has a pressing shoulder for pressing the connecting plate downward on the upper side of the guide section, the vertical bolt is located on the lower side of the corresponding guide rod, the upper end of the vertical bolt is spaced from the bottom of the guide rod, the top height of the vertical bolt is higher than the second explosion-proof fiber layer, the top of the vertical bolt is used to push with the bottom of the guide rod to limit the downward movement limit of the guide rod, and the steel pipe is filled with the first explosion-proof fiber; the fourth step is to fill the first explosion-proof fiber around the steel pipe and the buffer spring, and the upper end surface of the first explosion-proof fiber is not lower than the upper plate surface of the buffer plate; the fifth step is to connect the left and right ends of the steel skeleton of the UHPC concrete slab with the corresponding reserved steel bars, and use the upper plate surface of the buffer plate and the upper end surface of the first explosion-proof fiber as the bottom mold to pour UHPC concrete around the steel skeleton of the UHPC concrete slab.

[0022] The beneficial effects of the present invention are as follows: when an explosion occurs outside a building, the shock wave generated by the explosion acts on the UHPC concrete slab, which is a high-performance concrete slab that can withstand strong explosion shocks and ensure that it will not break or become unstable under the impact; the UHPC concrete produces downward elastic deformation due to the shock wave, and the deformation force is absorbed by the buffer spring, steel pipe and rock wool buffer layer, and the first explosion-proof fiber filled in the steel pipe can increase the supporting force of the steel pipe. In the present invention, instead of using only heavy concrete slabs, other materials that are lighter than concrete slabs are used in the buffer cavity, so the overall weight of the assembled explosion-proof roof panels is reduced compared to the simple concrete slabs of the prior art. In addition, the use of UHPC concrete slabs alone is also conducive to reducing the production cost of assembled explosion-proof roof panels.

[0023] Furthermore, the provision of the first explosion-proof fiber layer and the second explosion-proof fiber layer can significantly improve the fire resistance of the roof panel, effectively resist the threat posed by fire, prevent the spread of fire, and enhance the fire safety of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 It is a structural schematic diagram of Example 1 of an assembled explosion-proof roof panel using UHPC concrete in the present invention; Figure 2 yes Figure 1 AA section view in the figure; Figure 3 yes Figure 1 Stereoscopic image of Figure 4 yes Figure 1 Schematic diagram of the coordination between the steel pipe and the connecting plate; Figure 5 yes Figure 1 Schematic diagram of the coordination between the middle steel tube, buffer spring and vertical steel column; Figure 6 is a top view of the steel reinforcement skeleton of the UHPC in Example 1; Figure 7 This is a structural schematic diagram of Example 2 of an assembled explosion-proof roof panel using UHPC concrete in the present invention; Figure 8 yes Figure 7 Schematic diagram of the coordination between the middle steel tube group and the buffer spring; Fig. 9 yes Figure 7 Schematic diagram of the coordination between the steel pipe group and the buffer spring after the UHPC concrete slab is impacted; 1. UHPC concrete slab; 2. High-strength concrete slab; 3. Steel pipe; 4. First explosion-proof fiber; 5. Second explosion-proof fiber layer; 6. Rock wool buffer layer; 7. Buffer spring; 8. Steel skeleton of UHPC concrete slab; 9. Explosion-proof and fire-proof coating; 10. Vertical studs; 11. Vertical steel columns; 12. Bolts; 13. Mounting grooves; 14. Side walls; 15. Bottom wall; 16. Connecting plate; 17. Transverse reinforcement; 18. Longitudinal reinforcement; 19. Buffer plate; 20. Connecting plate guide holes; 21. Guide section; 22. Top pressure shoulder. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] Embodiment 1 of an assembled explosion-proof roof panel using UHPC concrete in the present invention is as follows Figures 1 to 6 As shown: The assembled explosion-proof roof panel is prefabricated in the factory and assembled on site. It includes a UHPC concrete panel 1 and a high-strength concrete panel 2 arranged at intervals from top to bottom. The high-strength concrete panel 2 has an installation groove 13 with a notch facing upward. The UHPC concrete panel 1 is located in the installation groove 13. The high-strength concrete panel includes a bottom wall 15 and side walls 14 arranged around the bottom wall. There is a buffer cavity between the UHPC concrete panel and the high-wall concrete panel. The upper end surface of the UHPC concrete panel is coated with an explosion-proof and fire-proof coating 9.

[0028] A second explosion-proof fiber layer 5 is laid on the upper side of the bottom wall of the high-strength concrete slab, and the second explosion-proof fiber layer 5 is fixed to the high-strength concrete slab 2 by vertical bolts 10 .

[0029] A plurality of steel pipes 3 arranged sequentially along the left-right direction are arranged on the upper side of the second explosion-proof fiber layer. The steel pipes 3 in this embodiment are thin-walled steel pipes with a wall thickness of 2 to 5 mm. The length of the steel pipes extends along the front-to-back direction, and any two adjacent steel pipes are connected by a connecting plate 20.

[0030] A buffer spring 7 with an axis extending in the up-down direction is provided on the connecting plate 20. The upper end of the steel pipe 3 is force-coordinated with the bottom of the UHPC concrete slab 1, and the lower end of the steel pipe is force-coordinated with the upper end of the bottom wall of the high-strength concrete slab through the second explosion-proof fiber layer. The steel pipe is filled with the first explosion-proof fiber 4, and the buffer cavity is filled with a rock wool buffer layer 6 around the steel pipe 3 and the buffer spring 7.

[0031] The inner sides of the four side walls of the high-strength concrete slab are protruding with reserved steel bars, which are connected to the steel skeleton of the high-strength concrete slab. The steel skeleton 8 of the UHPC concrete slab is connected to the corresponding reserved steel bars. In this embodiment, the steel skeleton of the UHPC concrete slab is composed of transverse bars 17 and longitudinal bars 18 arranged in a cross-direction.

[0032] A vertical steel column 11 connected to the high-strength concrete slab is fixed to the lower side of the connecting plate. In this embodiment, the vertical steel column 11 is fixed to the bottom of the connecting plate 16 by bolts 12. The vertical steel column 11 and the vertical studs 10 are staggered.

[0033] There is a buffer cavity between the UHPC concrete slab and the high-strength concrete slab, in which a plurality of steel pipes 3 are arranged sequentially along the left-right direction. The length of the steel pipe 3 extends along the front-back direction. A connecting plate 16 is arranged between two corresponding adjacent steel pipes. A buffer spring 7 with an axis extending along the up-down direction is arranged on the connecting plate 16. The upper end of the steel pipe 3 cooperates with the bottom of the UHPC concrete slab for force transmission.

[0034] During the production process, the high-strength concrete slab is poured first, then the second explosion-proof fiber layer is laid, and then the steel pipe is arranged. Then the rock wool buffer layer is filled, and then the steel skeleton of the UHPC concrete is connected to the expected steel bars reserved for the high-strength concrete slab. Finally, UHPC concrete is poured on the upper side of the rock wool buffer layer and the steel pipe. After the UHPC concrete is cured, it forms a UHPC concrete slab together with the steel skeleton.

[0035] When an explosion occurs outside the building, the shock wave first acts on the UHPC concrete slab 1, which deforms downward. The deformation acts on the buffer spring 7, the steel pipe 3 and the rock wool buffer layer 6. When the deformation is small, the buffer spring is sufficient to absorb the impact force of the explosion. The first explosion-proof fiber improves the supporting force and restoring force of the steel pipe, so that the steel pipe also has a certain elastic recovery ability. The steel pipe will also transfer part of the impact force to the high-strength concrete slab. As the deformation of the UHPC concrete slab increases, in the later stage of deformation, the deformation of the steel pipe and the compression of the rock wool buffer layer play a major buffering role.

[0036] Compared with the prior art, the present invention has the following technical effects: Enhanced explosion-proof performance: By adopting ultra-high performance concrete (UHPC) and optimizing the structural design, the present invention effectively improves the explosion-proof ability of the roof panel, which can withstand stronger explosion impacts and ensure that it will not break or become unstable under the explosion impact, thereby ensuring the overall safety of the building.

[0037] Reduce weight and reduce burden: The present invention uses lightweight composite materials, which greatly reduces the weight of the roof panel, reduces the burden of the building on the foundation, simplifies the construction process, and reduces the load-bearing requirements of the building foundation.

[0038] Improve fire resistance: By adding a fire-resistant layer to the composite material or using a more thermally stable material, the present invention significantly improves the fire resistance of the roof panel, can effectively resist the threat posed by fire, prevent the spread of fire, and enhance the fire safety of the building.

[0039] High cost-effectiveness: The present invention reduces the production cost of the roof panel by optimizing the material ratio and production process, while maintaining excellent explosion-proof performance and durability, making it more cost-effective in the market and suitable for a wider range of application scenarios.

[0040] Example 2 of an assembled explosion-proof roof panel using UHPC concrete Figures 7-9 As shown: The difference between Example 2 and Example 1 is that in this embodiment, the steel pipes are arranged into a plurality of steel pipe groups along the left-right direction, two adjacent steel pipe groups are independently arranged, each steel pipe group includes two steel pipes 3 arranged at intervals from left to right, and the two steel pipes 3 of each steel pipe group are connected by a connecting plate 16. The upper end of the buffer spring 7 is provided with a buffer plate 19 for contacting and cooperating with the bottom of the UHPC concrete slab, and the diameter of the buffer plate 19 is larger than the diameter of the buffer spring.

[0041] A connecting plate guide hole 20 is opened on the connecting plate, and a guide rod located on the inner side of the buffer spring is fixed on the buffer plate 19. The bottom of the guide rod has a guide section 21 for guiding and moving with the connecting plate guide hole 20, and the guide rod has a pressing shoulder on the upper side of the guide section for pressing the connecting plate downward.

[0042] A second explosion-proof fiber layer 5 is laid between the bottom of the steel pipe and the high-strength concrete slab. The second explosion-proof fiber layer 5 is fixed to the high-strength concrete slab 2 by vertical studs 10. The vertical studs 10 are located at the lower side of the corresponding guide rod. The upper end of the vertical stud 10 is spaced apart from the bottom of the guide rod. The top height of the vertical stud 10 is higher than the second explosion-proof fiber layer. The top of the vertical stud 10 is used to push against the bottom of the guide rod to limit the downward movement limit of the guide rod.

[0043] The setting of the buffer plate has the following technical effects. The buffer plate 19 has a large surface area. On the one hand, it can transmit the force over a larger range. On the other hand, the large surface area can also provide a sufficiently large area of ​​bottom mold support during the UHPC concrete pouring process. If the bottom mold support is completely provided by rock wool, the rock wool is prone to collapse and deformation during the pouring process. When an explosion occurs outside, the impact force acts on the UHPC concrete slab, and then on the buffer spring, rock wool and steel pipe. In the initial stage of the impact, the buffer spring bears the main impact force. As the impact force continues, the top pressure shoulder of the guide rod pushes the connecting plate to deform the connecting plate. During the deformation of the connecting plate, the connecting plate pulls the steel pipes on both sides. The steel pipes on both sides have a tendency to rotate and move relative to each other. Rotational friction and sliding friction are generated between the upper and lower ends of the steel pipe and the UHPC concrete slab and the second explosion-proof fiber layer. The elastic deformation of the connecting plate and the rotational friction of the steel pipe are used to realize energy consumption. As the UHPC concrete slab continues to move downward and deform, the four sides of the UHPC concrete slab will separate from the high-strength concrete slab, the UHPC concrete slab squeezes the steel pipe to deform, and the bottom of the guide rod presses the vertical studs, so that the impact force of the UHPC concrete slab is completely borne by the high-strength concrete slab.

[0044] An implementation example of a method for manufacturing an assembled explosion-proof roof panel using UHPC concrete Figures 7-9 As shown: The specific structure of the assembled explosion-proof roof panel in this embodiment is the same as that of the embodiment 2 of the assembled explosion-proof roof panel, and will not be described in detail here.

[0045] The method comprises the following steps: a first step, casting a high-strength concrete slab, the high-strength concrete slab having an upwardly recessed mounting groove, the high-strength concrete slab comprising a bottom wall and side walls arranged around, the inner sides of the two side walls protrudingly provided with reserved steel bars, the reserved steel bars being connected to the steel bar skeleton of the high-strength concrete slab; a second step, laying a second explosion-proof fiber layer on the upper side of the bottom wall of the high-strength concrete slab, fixing the second explosion-proof fiber layer on the bottom wall by vertical bolts; a third step, arranging steel pipes on the upper side of the second explosion-proof fiber layer, the steel pipes being arranged into a plurality of steel pipe groups in the left-right direction, each steel pipe group comprising two steel pipes spaced apart in the left-right direction, the two steel pipes of each steel pipe group being connected by a connecting plate, a buffer spring having an axis extending in the up-down direction being provided on the connecting plate, a buffer plate for contacting and cooperating with the bottom of the UHPC concrete slab being provided on the upper end of the buffer spring, the diameter of the buffer plate being larger than the diameter of the buffer spring, and a connecting plate guide being provided on the connecting plate The guide rod is located inside the buffer spring and is fixed on the buffer plate. The bottom of the guide rod has a guide section for guiding and moving with the guide hole of the connecting plate. The guide rod has a pressing shoulder for pressing the connecting plate downward on the upper side of the guide section. The vertical bolt is located on the lower side of the corresponding guide rod. The upper end of the vertical bolt is spaced from the bottom of the guide rod. The top height of the vertical bolt is higher than the second explosion-proof fiber layer. The top of the vertical bolt is used to push against the bottom of the guide rod to limit the downward movement limit of the guide rod. The steel pipe is filled with the first explosion-proof fiber. In the fourth step, the first explosion-proof fiber is filled around the periphery of the steel pipe and the buffer spring, and the upper end surface of the first explosion-proof fiber is not lower than the upper plate surface of the buffer plate. In the fifth step, the outer end of the steel skeleton of the UHPC concrete slab is connected to the corresponding reserved steel bars, and the UHPC concrete is poured around the steel skeleton of the UHPC concrete slab using the upper plate surface of the buffer plate and the upper end surface of the first explosion-proof fiber as the bottom mold.

[0046] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; 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 be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0047] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0048] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembled explosion-proof roof panel using UHPC concrete, characterized by: It includes a UHPC concrete slab and a high-strength concrete slab arranged at intervals in the upper and lower parts, a buffer cavity is provided between the UHPC concrete slab and the high-strength concrete slab, a plurality of steel pipes arranged in sequence along the left-right direction are provided in the buffer cavity, the length of the steel pipe is extended in the front-back direction, a connecting plate is provided between two corresponding adjacent steel pipes, a buffer spring with an axis extending in the upper and lower directions is provided on the connecting plate, the upper end of the steel pipe is matched with the bottom of the UHPC concrete slab for force transmission, the lower end of the steel pipe is matched with the upper end of the high-strength concrete slab for force transmission, the steel pipe is filled with a first explosion-proof fiber, and a rock wool buffer layer is filled on the periphery of the steel pipe and the buffer spring in the buffer cavity.

2. The assembled explosion-proof roof panel according to claim 1, characterized in that: The high-strength concrete slab has an upwardly notched mounting groove, and includes a bottom wall and side walls arranged around the bottom wall. The lower end of the steel pipe is force-coordinated with the upper end of the bottom wall, and reserved steel bars are protruding from the inner sides of the four side walls. The reserved steel bars are connected to the steel bar skeleton of the high-strength concrete slab, and the steel bar skeleton of the UHPC concrete slab is connected to the corresponding reserved steel bars.

3. The assembled explosion-proof roof panel according to claim 1 is characterized in that: A second explosion-proof fiber layer is laid between the bottom of the steel pipe and the high-strength concrete slab, and the second explosion-proof fiber layer is fixed to the high-strength concrete slab through vertical bolts.

4. The assembled explosion-proof roof panel according to any one of claims 1 to 3, characterized in that: Any two adjacent steel pipes are connected via the connecting plate.

5. The assembled explosion-proof roof panel according to claim 4 is characterized in that: A vertical steel column connected to the high-strength concrete slab is fixed to the lower side of the connecting plate.

6. The assembled explosion-proof roof panel according to any one of claims 1 to 3, characterized in that: The steel pipes are arranged into a plurality of steel pipe groups along the left-right direction, each of which includes two steel pipes spaced apart from each other, and the two steel pipes in each steel pipe group are connected by the connecting plate.

7. The assembled explosion-proof roof panel according to claim 6 is characterized in that: A buffer plate for contacting and cooperating with the bottom of the UHPC concrete slab is arranged at the upper end of the buffer spring, and the diameter of the buffer plate is larger than the diameter of the buffer spring.

8. The assembled explosion-proof roof panel according to claim 7 is characterized in that: A connecting plate guide hole is opened on the connecting plate, and a guide rod located on the inner side of the buffer spring is fixed to the buffer plate. The bottom of the guide rod has a guide section for guiding and moving with the connecting plate guide hole, and the guide rod has a pressing shoulder on the upper side of the guide section for pressing the connecting plate downward.

9. The assembled explosion-proof roof panel according to claim 8, characterized in that: A second explosion-proof fiber layer is laid between the bottom of the steel pipe and the high-strength concrete slab, and the second explosion-proof fiber layer is fixed to the high-strength concrete slab by vertical bolts. The vertical bolts are located on the lower side of the corresponding guide rods, and the upper ends of the vertical bolts are spaced apart from the bottom of the guide rods. The top height of the vertical bolts is higher than the second explosion-proof fiber layer, and the top of the vertical bolts is used to push against the bottom of the guide rod to limit the downward movement limit of the guide rod.

10. A method for manufacturing an assembled explosion-proof roof panel according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: a first step, casting a high-strength concrete slab, the high-strength concrete slab having an upwardly recessed mounting groove, the high-strength concrete slab comprising a bottom wall and side walls arranged around, the inner sides of the two side walls protrudingly provided with reserved steel bars, the reserved steel bars being connected to the steel bar skeleton of the high-strength concrete slab; a second step, laying a second explosion-proof fiber layer on the upper side of the bottom wall of the high-strength concrete slab, fixing the second explosion-proof fiber layer on the bottom wall by vertical bolts; a third step, arranging steel pipes on the upper side of the second explosion-proof fiber layer, the steel pipes being arranged into a plurality of steel pipe groups in the left-right direction, each steel pipe group comprising two steel pipes spaced apart in the left-right direction, the two steel pipes of each steel pipe group being connected by a connecting plate, a buffer spring having an axis extending in the up-down direction being provided on the connecting plate, a buffer plate for contacting and cooperating with the bottom of the UHPC concrete slab being provided on the upper end of the buffer spring, the diameter of the buffer plate being larger than the diameter of the buffer spring, and a connecting plate guide being provided on the connecting plate The guide rod is located inside the buffer spring and is fixed on the buffer plate. The bottom of the guide rod has a guide section for guiding and moving with the guide hole of the connecting plate. The guide rod has a pressing shoulder for pressing the connecting plate downward on the upper side of the guide section. The vertical bolt is located on the lower side of the corresponding guide rod. The upper end of the vertical bolt is spaced from the bottom of the guide rod. The top height of the vertical bolt is higher than the second explosion-proof fiber layer. The top of the vertical bolt is used to push against the bottom of the guide rod to limit the downward movement limit of the guide rod. The steel pipe is filled with the first explosion-proof fiber. In the fourth step, the first explosion-proof fiber is filled around the periphery of the steel pipe and the buffer spring, and the upper end surface of the first explosion-proof fiber is not lower than the upper plate surface of the buffer plate. In the fifth step, the outer end of the steel skeleton of the UHPC concrete slab is connected to the corresponding reserved steel bars, and the UHPC concrete is poured around the steel skeleton of the UHPC concrete slab using the upper plate surface of the buffer plate and the upper end surface of the first explosion-proof fiber as the bottom mold.

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