A special tool for binding a nuclear island arc-shaped reinforcing mesh and a construction method thereof

Abstract

The present application relates to a kind of nuclear island arc shape reinforcing mesh special tool and its construction method, including reinforcing bar spacing control device, arc single support truss and lateral stabilizing structure;Arc single support truss includes arc support truss upper chord, support truss lower chord and the several support truss web between it, constitute continuous triangular frame;Reinforcing bar spacing control device includes arc reinforcing bar and several positioning reinforcing bar;Lateral stabilizing structure includes movable diagonal, horizontal rod and respectively connect movable diagonal, form the interval triangular frame supported in the rear side of arc single support truss;Nuclear island arc shape reinforcing mesh special tool every front and back two as a group, for the binding of nuclear island arc shape reinforcing mesh.The tool solves the problem of arc shape reinforcing mesh prefabrication binding in nuclear island civil construction, and has replacement, can improve arc shape reinforcing mesh prefabrication efficiency, shorten nuclear power plant construction period.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology, specifically to a special tool for binding arc-shaped steel mesh in a nuclear island and its construction method. Background Technology

[0002] The containment vessel of a nuclear power plant is the ultimate physical barrier ensuring the normal operation of the reactor and responding to extreme accidents. Its structural strength, integrity, and durability directly determine the safety level and service life of the nuclear power plant. As a core load-bearing component in the double-layered containment vessel, the quality of the curved steel mesh directly affects the concrete pouring effect and the overall mechanical properties of the structure. In actual prefabrication construction, the binding operation of the curved steel mesh faces many severe challenges: First, due to the complex cylindrical curved surface structure of the containment vessel, the steel mesh at different elevations and locations has diverse radii of curvature and spatial orientations. Traditional construction methods struggle to accurately guarantee the spacing of the reinforcing bars, the thickness of the protective layer, and the surface shape, easily leading to uneven stress distribution. Second, the complex environment and limited working space of the nuclear island construction site place high demands on the lightweight, modular, and rapid assembly of tooling. Third, existing binding processes rely heavily on manual positioning and operation, resulting in high labor intensity, low efficiency, and poor quality stability, making it difficult to meet the stringent requirements of modern nuclear power engineering for high precision, high reliability, and standardized construction. Therefore, there is an urgent need to develop a specialized and tool-based construction fixture to solve the above-mentioned technical bottlenecks and comprehensively improve the prefabrication quality and construction efficiency of curved steel mesh. Summary of the Invention

[0003] The purpose of this invention is to provide a special tooling and construction method for binding arc-shaped steel mesh in nuclear islands, so as to solve the problems of poor forming accuracy of arc-shaped steel mesh, difficulty in controlling steel bar spacing, low construction efficiency and high safety hazards of high-altitude operations in traditional construction.

[0004] To achieve the above objectives, the technical solution provided by the present invention is as follows: The first aspect of this application provides a special tooling for binding arc-shaped steel mesh in a nuclear island, including a steel bar spacing control device, an arc-shaped single-piece support truss, and a lateral stabilizing structure; The arc-shaped single-piece support truss includes an arc-shaped support truss upper chord, a support truss lower chord, and several support truss web members between them; the two ends of the support truss web members are respectively supported and connected to the arc-shaped support truss upper chord and the support truss lower chord, and include two types of web members: vertical web members and inclined web members; the vertical web members and inclined web members, together with the arc-shaped support truss upper chord and the support truss lower chord, form a continuous triangular frame; The rebar spacing control device includes an arc-shaped rebar and several positioning rebars. The positioning rebars are evenly distributed along the length of the arc-shaped rebar and are erected on the arc-shaped rebar. The arc-shaped rebars are fitted and installed on the top of the upper chord of the arc-shaped support truss. The lateral stabilizing structure includes a movable diagonal bar, a horizontal bar, and a rotatable connector that connects one end of the movable diagonal bar and the horizontal bar respectively. The other ends of the movable diagonal bar and the horizontal bar are respectively connected to the upper and lower ends of the vertical web members of the supporting truss web members. The movable diagonal bar, the horizontal bar, and the vertical web members form a spaced triangular frame that supports the rear side of the arc-shaped single-piece supporting truss. The special tooling for binding the arc-shaped steel mesh of the nuclear island is used in pairs, front and back, for binding the arc-shaped steel mesh of the nuclear island.

[0005] To optimize the above technical solution, the specific measures also include: The curvature of the upper chord of the arc-shaped support truss is matched with the curvature of the steel reinforcement in each layer of the inner and outer shells of the nuclear island; the curvature of the arc-shaped steel reinforcement is matched with the curvature of the upper chord of the arc-shaped support truss.

[0006] Preferably, the vertical web members are evenly distributed along the length of the lower chord of the supporting truss, and the inclined web members are located diagonally opposite to the adjacent vertical web members; the inclined web members and vertical web members on the left and right sides are symmetrically distributed to form a continuous triangular frame with left and right symmetry.

[0007] Preferably, the angle between the inclined web member and the lower chord of the supporting truss is 45° to 60°.

[0008] Preferably, the web members of the supporting truss are hollow rectangular tubes.

[0009] The different spacing of the positioning steel bars are used as different specifications of binding tools. The steel bar spacing control device uses different color marks as the identifiers of different specifications of binding tools, and a nameplate for identifying the device specification information is hung on the curved steel bar.

[0010] Furthermore, the rotatable connector is a hinged pin connecting the lower end of the movable diagonal bar and one end of the horizontal bar; the upper part of the movable diagonal bar is provided with an upper fastening joint for fastening to the upper chord of the arc-shaped support truss near the vertical web member; the other end of the horizontal bar is provided with a lower fastening joint for fastening to the lower chord of the support truss near the vertical web member.

[0011] Furthermore, the rebar spacing control device is fixed to the upper chord of the arc-shaped support truss by steel wire binding.

[0012] The second aspect of this application provides a construction method for a special tooling for binding arc-shaped steel mesh in a nuclear island, comprising the following steps: S1: Place the arc-shaped single-piece support truss on a hardened and leveled processing site; S2: Connect the lateral stabilizing structure to the upper chord and lower chord of the arc-shaped support truss; S3: Fix the rebar spacing control device to the upper chord of the arc-shaped support truss; S4: After assembling the special tooling for binding the two identical nuclear island arc-shaped steel mesh sheets, place them in parallel. S5: Place the two ends of the vertical steel bars in sequence next to the positioning steel bars of the steel bar spacing control device of the special tool for binding the arc steel bar mesh of the two core islands. After the vertical steel bars are placed, lay the horizontal steel bars and bind the nodes of the vertical and horizontal steel bars to form the arc steel bar mesh of the core island. S6: Move the processed nuclear island arc-shaped steel mesh to the storage area.

[0013] The special tooling for binding the arc-shaped steel mesh of the nuclear island can be reused. After the bound arc-shaped steel mesh of the nuclear island is removed, the next round of binding of the arc-shaped steel mesh of the nuclear island can be carried out on the special tooling.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a special tooling for binding arc-shaped steel mesh in nuclear islands. Its arc-shaped single-piece support truss is custom-designed and precisely formed according to the shape and size of the arc-shaped steel mesh, providing stable support and ensuring the shaping effect of the arc-shaped steel mesh. The tooling's steel bar spacing control device can adjust the arc and spacing of the steel mesh according to different specifications of steel bars and design requirements, ensuring the accuracy of steel bar spacing and arc, and improving construction quality. The lateral stabilization structure of the tooling can be adjusted according to the actual height of the arc-shaped single-piece support truss, enhancing the lateral stability of the tooling and ensuring the safety of the construction project.

[0015] The construction method of this tooling uses modular assembly, which can efficiently complete the assembly and disassembly of the tooling, significantly improve the prefabrication efficiency of curved steel mesh, reduce labor intensity, effectively improve the construction quality of prefabricated curved steel mesh, and provide a guarantee for the structural strength and stability of the nuclear island containment. Attached Figure Description

[0016] Figure 1 : Top view of the special tool for binding the arc-shaped steel mesh of the nuclear island according to the present invention.

[0017] Figure 2 : A schematic diagram of the special tooling for binding the arc-shaped steel mesh of the nuclear island according to the present invention. Figure 3 : AA cross-sectional view of the special tool for binding the arc-shaped steel mesh of the nuclear island according to the present invention. Figure 4 : A schematic diagram of the rebar spacing control device of the special tooling for binding the arc-shaped rebar mesh of the nuclear island of the present invention. Figure 5 : A schematic diagram of the arc-shaped single-piece support truss of the special tooling for binding arc-shaped steel mesh in the nuclear island of the present invention. Figure 6 : A schematic diagram of the lateral stabilization structure of the special tooling for binding the arc-shaped steel mesh of the nuclear island according to the present invention. Figure 7 : Schematic diagram of assembly node ① of the special tooling for binding the arc-shaped steel mesh of the nuclear island of the present invention. Figure 8 : Schematic diagram of assembly node ② of the special tooling for binding the arc-shaped steel mesh of the nuclear island of the present invention. Figure 9 : Schematic diagram of assembly node ③ of the special tooling for binding the arc-shaped steel mesh of the nuclear island of the present invention. In the diagram: 1-Special tool for binding the arc-shaped steel mesh of the nuclear island; 2-Rebar spacing control device; 3-Arch-shaped single-piece support truss; 4-Lateral stabilizing structure; 5-Positioning steel bar; 6-Arch-shaped steel bar; 7-Nameplate; 8-Upper chord of the support truss; 9-Lower chord of the support truss; 10-Web member of the support truss; 11-Modible diagonal member; 12-Horizontal member; 13-Modible hinge; 14-Upper coupling; 15-Lower coupling; 16-Hinged pin; 17-Binding wire; 18-Upper chord coupling; 19-Lower chord coupling. Detailed Implementation

[0018] The present invention will be further described in detail below through specific embodiments, but it should not be construed as limiting the scope of the subject matter of the present invention to the following embodiments. All technologies implemented based on the above content of the present invention fall within the scope of the present invention.

[0019] This invention provides a special tooling for binding arc-shaped steel mesh in nuclear islands, such as... Figure 1 , Figure 2 and Figure 3 As shown, the special tooling 1 for binding the arc-shaped steel mesh of the nuclear island includes a steel bar spacing control device 2, an arc-shaped single-piece support truss 3, and a lateral stabilizing structure 4. like Figure 5 As shown, the arc-shaped single-piece support truss 3 includes an arc-shaped support truss upper chord 8, a support truss lower chord 9, and several support truss web members 10 between them; the two ends of the support truss web members 10 are respectively supported and connected to the arc-shaped support truss upper chord 8 and the support truss lower chord 9, and include two types of web members: vertical web members and inclined web members; the vertical web members and inclined web members, together with the arc-shaped support truss upper chord 8 and the support truss lower chord 9, form a continuous triangular frame, and the load is transferred to the support truss lower chord 9 through the triangular web member structure, thereby improving the overall support of the arc-shaped single-piece support truss 3.

[0020] The vertical web members are evenly distributed along the length of the lower chord 9 of the supporting truss, and the inclined web members are located on the diagonal of the adjacent vertical web members. The inclined web members and vertical web members on the left and right sides are symmetrically distributed to form a continuous triangular frame with left and right symmetry, which ensures that the truss will not buckle or twist, and guarantees the shape stability and structural integrity of the special tool 1 for binding the arc-shaped steel mesh of the nuclear island under heavy load.

[0021] In some implementations, the angle between the inclined web members and the lower chord 9 of the supporting truss is 45° to 60°, so that the inclined web members can efficiently share the load without generating excessive adverse forces.

[0022] The supporting truss web members 10 are hollow rectangular tubes, which ensure sufficient strength to support the steel mesh while reducing the weight of the special tooling 1 for binding the arc-shaped steel mesh of the nuclear island, making it easier to handle, install and relocate the special tooling 1 for binding the arc-shaped steel mesh of the nuclear island.

[0023] like Figure 4 As shown, the rebar spacing control device 2 includes an arc-shaped rebar 6 and several positioning rebars 5. The positioning rebars 5 are evenly distributed along the length of the arc-shaped rebar 6 and are erected on the arc-shaped rebar 6. The arc-shaped rebar 6 is fitted and installed on the top of the upper chord 8 of the arc-shaped support truss.

[0024] In some embodiments, the rebar spacing control device 2 is fixed to the upper chord 8 of the arc-shaped support truss by binding wire 17, which facilitates the disassembly and replacement of rebar spacing control devices 2 of different specifications.

[0025] like Figure 3 and Figure 6 As shown, the lateral stabilizing structure 4 includes a movable diagonal bar 11, a horizontal bar 12, and rotatable connectors that connect one end of the movable diagonal bar 11 and the horizontal bar 12 respectively. The other ends of the movable diagonal bar 11 and the horizontal bar 12 are respectively connected to the upper and lower ends of the vertical web members of the supporting truss web members 10. The movable diagonal bar 11, the horizontal bar 12, and the vertical web members form a spaced triangular frame that supports the rear side of the arc-shaped single-piece supporting truss 3, providing lateral stabilizing support and preventing the nuclear island arc-shaped steel mesh binding special tooling 1 from overturning.

[0026] like Figure 8 As shown, the rotatable connector is a hinged pin 16 that connects the lower end of the movable diagonal bar 11 and one end of the horizontal bar 12; the upper part of the movable diagonal bar 11 is provided with an upper fastening joint 14 for fastening to the upper chord 8 of the arc-shaped support truss near the vertical web member; the other end of the horizontal bar 12 is provided with a lower fastening joint 15 for fastening to the lower chord 9 of the support truss near the vertical web member.

[0027] In some embodiments, one end of the lateral stabilizing structure 4 is connected by a hinged pin 16 to form a rotatable hinge 13, and the other end is fastened to the upper chord 8 and lower chord 9 of the arc-shaped single-piece support truss 3 by an upper fastening joint 14 and a lower fastening joint 15, respectively.

[0028] Specifically, the upper connector 14 at the upper end of the movable diagonal brace 11 and the upper chord connector 18 of the upper chord of the arc-shaped support truss 8 are fixed together by binding wire 17, such as Figure 7 As shown.

[0029] like Figure 9 As shown, the lower part of the horizontal bar 12 is directly fastened to the lower chord of the vertical web bar for installation.

[0030] The curvature of the upper chord 8 of the arc-shaped support truss is matched with the curvature of the steel reinforcement in each layer of the inner and outer shell of the nuclear island; the curvature of the arc-shaped steel reinforcement 6 is matched with the curvature of the upper chord 8 of the arc-shaped support truss to ensure that the arc shape of the nuclear island arc-shaped steel reinforcement mesh tied on the special tooling 1 meets the design requirements.

[0031] Based on the different spacing of the positioning steel bars 5, special tool 1 for binding the arc-shaped steel mesh of the nuclear island of different specifications is used. The steel bar spacing control device 2 uses different color marks as the identification of special tool 1 for binding the arc-shaped steel mesh of the nuclear island of different specifications, which increases the visual identification. Nameplates 7 for identifying device specification information are hung on the arc-shaped steel bars 6 to prevent the binding of the arc-shaped steel mesh of the nuclear island of different specifications and facilitate the subsequent acceptance of finished products.

[0032] This invention also provides a construction method for binding arc-shaped steel mesh in nuclear islands using specialized tools, comprising the following steps: S1: Place the arc-shaped single-piece support truss 3 on a hardened and flat processing site; S2: Connect the lateral stabilizing structure 4 to the upper chord 8 and lower chord 9 of the arc-shaped support truss; S3: Tie and fix the steel bar spacing control device 2 to the upper chord 8 of the arc-shaped support truss; S4: After assembling the two identical nuclear island arc-shaped steel mesh binding special tool 1, place them in parallel. S5: Place the two ends of the vertical steel bars in sequence next to the positioning steel bars 5 of the steel bar spacing control device 2 of the special tool 1 for binding the arc-shaped steel bar mesh of the two core islands. After the vertical steel bars are placed, lay the horizontal steel bars and bind the nodes of the vertical and horizontal steel bars to form the arc-shaped steel bar mesh of the core island. S6: Move the processed nuclear island arc-shaped steel mesh to the storage area.

[0033] The special tool for binding the arc-shaped steel mesh of the nuclear island can be reused. After the bound arc-shaped steel mesh of the nuclear island is removed, the next round of binding of the arc-shaped steel mesh of the nuclear island can be carried out on the special tool 1 for binding the arc-shaped steel mesh of the nuclear island.

[0034] The technical solution of the present invention will be further described in detail below with reference to specific implementation operations: The designed and specified arc-shaped single-piece support truss 3 is erected on a hardened and leveled processing site; one end of the lateral stabilizing structure 4 is connected by a hinged pin 16 to form a rotatable hinge 13, and the other end is fastened to the upper chord 8 and lower chord 9 of the arc-shaped single-piece support truss 3 by an upper fastener 14 and a lower fastener 15 respectively; after the lateral stabilizing structure is installed, the rebar spacing control device 2 is tied, and the curvature of the arc-shaped rebar 6 of the rebar spacing control device is matched with the curvature of the upper chord 8 of the arc-shaped support truss; the special tooling 1 for tying the arc-shaped rebar mesh of the nuclear island is assembled, and two nuclear island arc-shaped rebar meshes of the same specification are tied together. After the special tool 1 for binding the reinforcing mesh is assembled, it is placed in parallel. The positioning reinforcing bars 5 of the spacing control device on the two nuclear island arc-shaped reinforcing mesh binding tool 1 correspond one-to-one. The two ends of the vertical reinforcing bars are placed next to the positioning reinforcing bars 5 of the reinforcing bar spacing control device 2 on the two nuclear island arc-shaped reinforcing mesh binding tool 1. After the vertical reinforcing bars are placed, the horizontal reinforcing bars are laid. The nodes of the vertical and horizontal reinforcing bars are bound to form the nuclear island arc-shaped reinforcing mesh. After the bound nuclear island arc-shaped reinforcing mesh is removed, the next round of binding of the nuclear island arc-shaped reinforcing mesh is carried out on the special tool 1 for binding the nuclear island arc-shaped reinforcing mesh.

[0035] This invention solves the problem of prefabricating and binding arc-shaped steel mesh in the civil construction of nuclear islands. It also designs an arc-shaped support truss that can be customized according to the curvature of the nuclear island steel bars, a replaceable steel bar spacing control device made according to the designed steel bar spacing, and an adjustable lateral stabilizing structure whose angle can be adjusted according to the height of the truss.

[0036] This tooling adopts a modular design, which enables rapid assembly and convenient disassembly, improving the flexibility and continuity of the construction process. Its standardized and serialized component design not only ensures the substitutability and versatility of each component, effectively reducing the construction period delay caused by component damage, but also adapts to the processing needs of steel mesh with different curvatures and specifications.

[0037] This invention can significantly improve the prefabrication efficiency of curved steel mesh, reduce the intensity of manual operation, and at the same time ensure accurate mesh size and stable forming quality, providing a reliable guarantee for the overall project quality.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A special tooling for binding arc-shaped steel mesh in a nuclear island, characterized in that: It includes a steel bar spacing control device (2), an arc-shaped single-piece support truss (3), and a lateral stabilizing structure (4). The arc-shaped single-piece support truss (3) includes an arc-shaped support truss upper chord (8), a support truss lower chord (9), and several support truss web members (10) between them; the two ends of the support truss web members (10) are respectively supported and connected to the arc-shaped support truss upper chord (8) and the support truss lower chord (9), and include two types of web members: vertical web members and inclined web members; the vertical web members and inclined web members together with the arc-shaped support truss upper chord (8) and the support truss lower chord (9) form a continuous triangular frame; The rebar spacing control device (2) includes an arc-shaped rebar (6) and several positioning rebars (5). The positioning rebars (5) are evenly distributed along the length of the arc-shaped rebar (6) and are erected on the arc-shaped rebar (6). The arc-shaped rebar (6) is fitted to the top of the upper chord (8) of the arc-shaped support truss. The lateral stabilizing structure (4) includes a movable diagonal bar (11), a horizontal bar (12), and a rotatable connector that connects one end of the movable diagonal bar (11) and the horizontal bar (12), respectively. The other ends of the movable diagonal bar (11) and the horizontal bar (12) are respectively connected to the upper and lower ends of the vertical web members of the supporting truss web members (10). The movable diagonal bar (11), the horizontal bar (12), and the vertical web members form a spaced triangular frame that supports the rear side of the arc-shaped single-piece supporting truss (3). The special tool for binding the arc-shaped steel mesh of the nuclear island (1) consists of two pieces at the front and back, and is used for binding the arc-shaped steel mesh of the nuclear island.

2. The special tooling for binding arc-shaped steel mesh in a nuclear island according to claim 1, characterized in that: The curvature of the upper chord (8) of the arc-shaped support truss is matched with the curvature of the steel bars in each layer of the inner and outer shell of the nuclear island; the curvature of the arc-shaped steel bar (6) is matched with the curvature of the upper chord (8) of the arc-shaped support truss.

3. The special tooling for binding arc-shaped steel mesh in a nuclear island according to claim 1, characterized in that: The vertical web members are evenly distributed along the length of the lower chord (9) of the supporting truss, and the inclined web members are located at the diagonal position of the adjacent vertical web members; the inclined web members and vertical web members on the left and right sides are symmetrically distributed to form a continuous triangular frame with left and right symmetry.

4. The special tooling for binding arc-shaped steel mesh in a nuclear island according to claim 3, characterized in that: The angle between the inclined web member and the lower chord (9) of the supporting truss is 45° to 60°.

5. The special tooling for binding arc-shaped steel mesh in a nuclear island according to claim 1, characterized in that: The web members (10) of the supporting truss are hollow rectangular tubes.

6. The special tooling for binding arc-shaped steel mesh in a nuclear island according to claim 1, characterized in that: According to the different spacing of the positioning steel bars (5), different specifications of binding tools are used. The steel bar spacing control device (2) uses different color marks as the identification of the special tool (1) for binding the nuclear island arc steel bar mesh of different specifications, and hangs a nameplate (7) on the arc steel bar (6) to identify the device specification information.

7. The special tooling for binding arc-shaped steel mesh in a nuclear island according to claim 1, characterized in that: The rotatable connector is a hinged pin (16) connecting the lower end of the movable diagonal bar (11) and one end of the horizontal bar (12); the upper part of the movable diagonal bar (11) is provided with an upper fastening joint (14) for fastening to the upper chord (8) of the arc-shaped support truss near the vertical web member; the other end of the horizontal bar (12) is provided with a lower fastening joint (15) for fastening to the lower chord (9) of the support truss near the vertical web member.

8. The special tooling for binding arc-shaped steel mesh in a nuclear island according to claim 1, characterized in that: The rebar spacing control device (2) is fixed to the upper chord (8) of the arc-shaped support truss by steel wire (17).

9. The construction method of the special tooling for binding the arc-shaped steel mesh of the nuclear island as described in claim 1, characterized in that, Includes the following steps: S1: Place the arc-shaped single-piece support truss (3) on a hardened and flat processing site; S2: Connect the lateral stabilizing structure (4) to the upper chord (8) of the arc-shaped support truss and the lower chord (9) of the support truss. S3: Fix the steel bar spacing control device (2) on the upper chord (8) of the arc-shaped support truss; S4: After assembling the two identical nuclear island arc steel mesh binding special tool (1), place them in parallel. S5: Place the two ends of the vertical steel bars in sequence next to the positioning steel bars (5) of the steel bar spacing control device (2) of the special tool (1) for binding the arc steel bar mesh of the two nuclear islands. After the vertical steel bars are placed, lay the horizontal steel bars and bind the nodes of the vertical steel bars and the horizontal steel bars to form the arc steel bar mesh of the nuclear island. S6: Move the processed nuclear island arc-shaped steel mesh to the storage area.

10. A construction method for a special tooling for binding arc-shaped steel mesh in a nuclear island according to claim 9, characterized in that: The special tool (1) for binding the arc-shaped steel mesh of the nuclear island can be reused. After the binding of the arc-shaped steel mesh of the nuclear island is removed, the next round of binding of the arc-shaped steel mesh of the nuclear island is carried out on the special tool (1).

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