A support structure and construction method for the steel reinforcement cage of the concrete wall of a nuclear power plant

Abstract

The present invention discloses a support structure and construction method for the steel reinforcement cage of a concrete wall in a nuclear power plant, which relates to the field of structural engineering. It includes a node reinforcement member, which includes fasteners. Multiple support steel bars in the wall steel reinforcement cage are connected by the fasteners to form a criss-cross steel bar mesh. An internal limit support member, which includes a fixing member, and the fixing member is provided with a U-shaped groove for connecting the support steel bars. V-shaped stay bars are spaced and connected between the two fixing members, and the openings of adjacent stay bars face in opposite directions. The internal limit support member is connected to the inner side of the steel bar mesh. An external lateral support member, which includes a support member, is connected to the outer side of the steel bar mesh. The fixing member with a U-shaped groove opening is used to manufacture the internal limit support member to position and limit the steel bars in the steel reinforcement cage, which can ensure the precise positioning of the steel bars during the construction process of the steel reinforcement cage. The support member of the external lateral support member provides a reliable anchoring support point for the steel reinforcement cage wall, which can reduce most or even eliminate temporary lateral supports such as scaffolding steel pipes.

Description

Technical Field

[0001] The present invention relates to the field of structural engineering, and particularly to a support structure and construction method for the steel bar cage of a concrete wall in a nuclear power plant. Background Art

[0002] In nuclear power projects, the structural members generally have a large amount of steel bar reinforcement and many installation items. The traditional on-site steel bar binding method belongs to extensive construction. The integrated prefabricated construction of the steel bar cage is adopted to realize the transformation of steel bar construction from traditional on-site binding to modular construction of the steel bar cage, which is beneficial to shortening the construction period and ensuring the construction quality. However, the lateral safety and stability of the steel bar cage are poor during the processes of processing, storage, transportation, and hoisting into place. If the overall stability of the steel bar cage is insufficient, it will further lead to inaccurate positions of the steel bar joints.

[0003] The existing support for the steel bar cage is to set up a formwork outside the steel bars to strengthen the binding strength of the steel bars and position the steel bars. However, this support structure is prone to deviation in the positioning position of the steel bars, and even affects the connection of the sleeves at the positions of the steel bar joints after the steel bar cage is in place.

[0004] In the existing construction process, the lateral safety support of the steel bar cage generally needs to be achieved by separately setting up external construction measures such as scaffolding in the processes of processing, transportation, hoisting, etc. There are repetitive tasks in each construction link, with a large workload and low construction efficiency. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a support structure and construction method for the steel bar cage of a concrete wall in a nuclear power plant, which is used to improve the overall lateral stability of the steel bar cage and ensure the accurate positioning of the steel bar cage joints; by adding limit support members, node strengthening members, and external lateral support members inside and outside the steel bar cage, the overall stability of the steel bar cage module during the processes of processing, transportation, hoisting, and positioning can be improved, most of the temporary lateral supports such as scaffolding steel pipes can be reduced or even eliminated, and at the same time, the positions of the steel bar joints are ensured to be accurate, which is convenient for the accurate connection of the sleeves at the positions of the steel bar joints after the steel bar cage is in place.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a support structure for the steel bar cage of a concrete wall in a nuclear power plant, including:

[0008] A node strengthening member, including fasteners, and a plurality of support steel bars in the wall steel bar cage are connected by the fasteners to form a criss-cross steel bar mesh;

[0009] The internal limit support member includes a fixing member, the fixing member is provided with a U-shaped groove for connecting the supporting steel bars; V-shaped inclined steel bars are connected between two fixing members at intervals, and the openings of adjacent inclined steel bars face opposite directions; the internal limit support member is connected to the inner side of the steel mesh;

[0010] The external lateral support member includes a support member connected to the outside of the steel mesh.

[0011] As a further implementation, the node reinforcement also includes oblique reinforcement, and the oblique reinforcement is connected to the supporting steel bar via a fastener.

[0012] As a further implementation, U-shaped grooves are symmetrically arranged on both sides of the fixing member.

[0013] As a further implementation, the U-shaped grooves are set at equal intervals along the length direction of the fixing member.

[0014] As a further implementation method, the spacing distance of the U-shaped grooves is set according to the preset spacing of the supporting steel bars.

[0015] As a further implementation method, the external lateral support member also includes a pad and a steel beam; one side of the pad is connected to the steel beam, and the other side is connected to the support member; the external lateral support member is fixedly connected to the steel mesh by bolts through the support member.

[0016] In a second aspect, an embodiment of the present invention further provides a construction method for a concrete wall steel cage of a nuclear power plant, the specific steps of which are as follows:

[0017] Connect the external lateral support members to the steel mesh of the wall reinforcement cage;

[0018] Connect one side of the manufactured internal limit support member to the steel mesh to which the external lateral support member has been tied; and tie the steel mesh on the other side of the internal limit support member;

[0019] Install node reinforcements on the steel mesh;

[0020] Install the external lateral support member on the steel mesh on the other side;

[0021] After re-measurement and adjustment of the deviation of the wall reinforcement cage, hoist it into place and connect the reinforcement joint sleeve;

[0022] Install anchor bolts between supports and base plate, install wall formwork, and pour concrete.

[0023] As a further implementation method, the steel beam of the lateral support structure is bolted to the steel mesh in the wall steel cage.

[0024] As a further implementation method, the fixing part in the internal limit support member is welded to the support steel bars in the wall reinforcement cage.

[0025] As a further implementation method, after the concrete reaches the strength, the support member is removed, or the support member is retained and removed after all the wall constructions are completed.

[0026] The beneficial effects of the present invention are as follows:

[0027] (1) The fixing part with a U-shaped notch in the present invention is used to manufacture the internal limit support member, and the support member is connected to the outside of the steel mesh as the external lateral support member of the entire reinforcement cage. The internal limit support member positions and limits the steel bars in the reinforcement cage, which can ensure the precise positioning of the steel bars during the construction process of the reinforcement cage. The internal limit support member and the external lateral support member enhance the overall strength of the reinforcement cage.

[0028] (2) The present invention utilizes the certain stiffness possessed by the reinforcement cage itself after being bound and formed, and further strengthens the overall stiffness of the reinforcement cage by arranging node strengthening members on the bound reinforcement cage, ensuring that the deformation of the reinforcement cage during the construction process is within a controllable range.

[0029] (3) The internal limit support member of the present invention can be exempted from removal, which is beneficial to improving the construction efficiency of the wall reinforcement cage. The external lateral support member of the present invention provides a reliable anchoring support point for the reinforcement cage wall, improves the anti-overturning ability of the reinforcement cage, and can reduce most or even cancel the temporary lateral supports such as scaffolding steel pipes. Moreover, after the external lateral support member is removed, it can be moved to the next reinforcement cage for repeated use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The specification drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0031] Figure 1 is a schematic diagram of the overall structure of the present invention applied to a wall reinforcement cage according to one or more embodiments;

[0032] Figure 2 is a schematic diagram of the structure of the internal limit support member of the present invention according to one or more embodiments;

[0033] Figure 3 is a schematic diagram of the node strengthening member of the wall reinforcement cage of the present invention according to one or more embodiments;

[0034] Figure 4 is Figure 3 the A-A view of

[0035] Figure 5 isFigure 4 View B is a structural diagram of a fastener according to one or more embodiments of the present invention;

[0036] Figure 6 is a schematic structural diagram of an external lateral support member according to one or more embodiments of the present invention;

[0037] Among them, 1. fixing parts, 2. U-shaped grooves, 3. diagonal steel bars, 4. supporting steel bars, 5. diagonal steel bars, 6. fasteners, 7. supporting parts, 8. pads, 9. steel mesh, and 10. bolts. DETAILED DESCRIPTION

[0038] Embodiment 1:

[0039] like Figures 1-6 An embodiment of the present invention provides a support structure for a reinforcement cage of a concrete wall of a nuclear power plant, comprising a node reinforcement, an internal limiting support member and an external lateral support member.

[0040] The node reinforcement is used to connect the multiple support steel bars 4 in the wall reinforcement cage. The support steel bars 4 are crisscrossed to form a mesh structure. The multiple support steel bars 4 constitute the steel mesh 9. The node reinforcement is set to further enhance the support strength of the entire steel mesh 9. The internal limit support member and the external lateral support member of the present application are respectively located inside and outside the entire wall reinforcement cage, and are used to support the inside and outside of the wall reinforcement cage, thereby enhancing the strength of the entire wall reinforcement cage.

[0041] The node reinforcement includes a fastener 6, through which a plurality of supporting steel bars 4 in the wall steel cage are connected to form a crisscross steel mesh 9; Figure 5 The structure of the fastener 6 shown in the figure, the fastener 6 includes a fixing piece that is vertically fixedly connected, and two through holes are respectively opened in the two fixing pieces that are perpendicular to each other, and the axes of the two through holes are vertically distributed. By inserting two vertically distributed supporting steel bars 4 into the two vertically distributed through holes of the fastener, and locking the fastener 6 by bolts, the two supporting steel bars 4 are vertically fixed to each other.

[0042] A plurality of supporting steel bars 4 are distributed longitudinally, and a plurality of supporting steel bars 4 are distributed transversely. The supporting steel bars 4 distributed transversely and longitudinally are connected by fasteners 6 to form a crisscross steel mesh 9. Figure 4 As shown, in the steel mesh 9 formed by a plurality of supporting steel bars 4, each node of the supporting steel bars 4 intersecting horizontally and vertically is connected with a fastener 6.

[0043] like Figure 4As shown, the node reinforcement also includes a stay bar 5, and the stay bar 5 is connected to the support steel bar 4 by a fastener. The stay bar 5 is arranged at an angle to the support steel bar 4. The intersection node of the stay bar 5 and the support steel bar 4 is fixedly connected by a fastener. Select a fastener of appropriate specification according to the diameter of the support steel bar 4 to strengthen the connection nodes of the steel reinforcement cage, and arrange the stay bar 5 appropriately, which can achieve the purpose of improving the overall stiffness of the steel reinforcement cage.

[0044] The internal limit support member includes a fixing member 1, and V-shaped stay steel bars 3 are spaced and connected between the two fixing members 1; the V-shaped stay steel bars are spaced and connected between the two fixing members, and the open ends of the stay steel bars are staggered along the length direction of the fixing member, that is, the open ends of adjacent two V-shaped stay steel bars face in opposite directions and are staggered along the length direction of the fixing member, further realizing the strength support for the two fixing members.

[0045] The internal limit support member is connected to the inner side of the steel mesh 9. The internal limit support member includes two fixing members 1 arranged in parallel. The fixing member 1 is made of steel plate and is a rectangular steel plate structure. Stay steel bars 3 are arranged at equal intervals along the length direction of the two fixing members 1.

[0046] One end of the V-shaped opening of the stay steel bar 3 is connected to one fixing member 1, and the closed end of the stay steel bar 3 is connected to the other fixing member 1. The purpose of the stay steel bar 3 is to connect the two fixing members 1, and the two fixing members 1 are welded and connected by the stay steel bar 3 to form an internal limit support member.

[0047] U-shaped grooves 2 are symmetrically arranged on both sides of each fixing member 1, and the U-shaped grooves 2 are set at equal intervals along the length direction of the fixing member 1. The interval distance of the U-shaped grooves 2 is set according to the preset spacing of the support steel bars. The fixing member is provided with U-shaped grooves 2 for connecting the support steel bars; the purpose of the U-shaped grooves 2 is to provide an installation position for the connection between the support steel bars and the fixing member 1, so U-shaped grooves 2 are opened on the fixing member 1 plate according to the steel bar design spacing, and the purpose is to limit the support steel bars. Thus, the steel mesh is installed on the fixing member 1, and steel meshes 9 are installed on the outer sides of the two fixing members 1, so as to place the fixing member 1 between the steel meshes of the wall steel reinforcement cage, and the internal limit support member is used as the internal support structure of the wall steel reinforcement cage.

[0048] The external lateral support member includes a support member 7, a backing plate 8, and a steel beam; the steel beam is a square steel. One side of the backing plate 8 is connected to the steel beam, and the other side is connected to the support member 7; the external lateral support member is bolted and fixed to the steel mesh 9 through the support member 7. The support member 7 is located on the outer side of the steel mesh 9, and the entire external lateral support member is located on the outer side of the steel mesh 9, forming an external support structure for the steel mesh 9.

[0049] As Figure 6As shown, backing plates 8 are symmetrically connected to both sides of the steel beam. The backing plates 8 and the steel beam are fixedly connected by bolts. On the other side of the backing plates 8, support members 7 are symmetrically connected. The support members 7 and the steel beam are fixedly connected by bolts, so that the entire external lateral support member is connected to the steel mesh 9. An internal limit support member is installed inside the steel mesh 9, and the external lateral support member is connected externally, forming an internal and external support structure for the steel mesh 9.

[0050] Two support members are arranged on both sides of the wall reinforcement cage, and a steel beam + backing plate are connected into a whole between the two support members 7. The steel beam and the backing plate are connected by welding, and bolts 10 are used to connect the backing plate and the support members 7. Moreover, edge sealing node plates are arranged at both the top and the bottom of the support members 7, and bolt holes are opened in the node plates for the connection and fixation between the upper and lower layer lateral support support members 7.

[0051] After the wall reinforcement cage is hoisted in place, the support members 7 of the external lateral support member are anchored to the constructed concrete floor slab by expansion bolts, providing a stable anchoring support point for the wall reinforcement cage. Edge sealing plates and bolt holes are reserved at the top of the vertical support members 7 for connection with the upper layer wall reinforcement cage. After the wall construction is completed, the expansion bolts connecting the support members 7 of the external lateral support member and the floor slab are cut off, and the connection bolts of the support members are removed, and the support members can be removed.

[0052] The support structure for integral installation of the wall reinforcement cage refers to combining the internal limit support member and the external lateral support member of the wall reinforcement cage to provide support for the wall reinforcement cage. At the same time, node strengthening connection members are arranged on the reinforcement cage, forming a structural form that provides support for the wall reinforcement cage.

[0053] Embodiment 2

[0054] The embodiment of the present invention also provides a construction method for the reinforcement cage of the concrete wall of a nuclear power plant. Based on the support structure for the reinforcement cage of the concrete wall of a nuclear power plant in Embodiment 1, the specific steps are as follows:

[0055] Step 1: Connect the external lateral support member to the steel mesh of the wall reinforcement cage.

[0056] Further, fabricate the support members 7 of the unilateral external lateral support member and the connecting steel beam, arrange the support members 7 in the reinforcement cage processing area, and bind the unilateral steel mesh 9 on the support members 7.

[0057] Further, bolt-connect the steel beam of the lateral support structure to the steel mesh 9 in the wall reinforcement cage.

[0058] Furthermore, after step 1 and before step 2, an internal limit support member is manufactured, including a fixing member 1 and a U-shaped groove 2 is opened on the fixing member 1, and two steel plates are connected with V-shaped inclined steel bars 3 to form a complete internal limit support member frame.

[0059] Step 2: Connect one side of the manufactured internal limit support member to the steel mesh 9 to which the external lateral support member has been tied; and tie the steel mesh 9 to the other side of the internal limit support member.

[0060] Furthermore, the internal limit support member is connected to the steel mesh 9, and the fixing member in the internal limit support member is welded to the supporting steel bars of the steel mesh 9, and the U-shaped groove 2 on the fixing member is welded to the supporting steel bars 4.

[0061] Furthermore, steel mesh sheets 9 are respectively tied to both sides of the internal limit support member to form internal support for the wall steel cage.

[0062] Step 3: Install node reinforcements on the steel mesh 9.

[0063] Furthermore, the fasteners 6 and the diagonal tie bars 5 of the reinforcement cage node connection components are installed, and the embedded parts and penetration parts are installed.

[0064] Step 4: Install the external lateral support member on the steel mesh 9 on the other side.

[0065] Furthermore, the external lateral support member 7 on the other side is manufactured and installed, and the connecting bolts of the support member 7 are tightened to achieve effective restraint of the external lateral support member on the steel cage.

[0066] Step 5: Re-measure and adjust the deviation of the wall reinforcement cage, then hoist it into place and connect the reinforcement joint sleeve.

[0067] Step 6: Install anchor bolts between support member 7 and the base plate, install wall formwork, and pour concrete. Remove support member 7 after the concrete reaches the required strength, or keep support member 7 and remove it after all wall construction is completed.

[0068] The present invention improves the overall stability of the steel cage module during the processing, manufacturing, transportation, lifting and positioning processes by adding limiting support components, node reinforcement components and lateral support components inside and outside the steel cage. It can reduce most of or even eliminate temporary lateral supports such as scaffolding steel pipes, while ensuring the accurate position of the steel bar joints, facilitating the accurate connection of the sleeves at the steel bar joint position after the steel cage is in place.

[0069] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A support structure for a reinforced cage of a concrete wall of a nuclear power plant, It is characterized in that include: Node reinforcements, including fasteners, are used to connect multiple supporting steel bars in the wall reinforcement cage to form a crisscross steel mesh; The internal limit support member includes a fixing member, the fixing member is provided with a U-shaped groove for connecting the supporting steel bars; V-shaped inclined steel bars are connected between two fixing members at intervals, and the openings of adjacent inclined steel bars face opposite directions; the internal limit support member is connected to the inner side of the steel mesh; An external lateral support member, including a support member, connected to the outside of the steel mesh; The fastener comprises a fixing piece connected vertically and fixedly, two fixing pieces perpendicular to each other are respectively provided with through holes, the axes of the two through holes are vertically distributed, and the two supporting steel bars are vertically fixed to each other by inserting two vertically distributed supporting steel bars into the two vertically distributed through holes of the fastener and locking the fastener with bolts; The node reinforcement also includes an oblique tie bar, and the oblique tie bar is connected to the supporting steel bar by a fastener; The external lateral support member also includes a pad and a steel beam; one side of the pad is connected to the steel beam, and the other side is connected to the support member; the external lateral support member is fixedly connected to the steel mesh by bolts through the support member.

2. A support structure for a concrete wall steel cage of a nuclear power plant as claimed in claim 1, It is characterized in that U-shaped grooves are symmetrically arranged on both sides of the fixing piece.

3. A support structure for a concrete wall steel cage of a nuclear power plant as claimed in claim 2, It is characterized in that The U-shaped grooves are set at equal intervals along the length direction of the fixing member.

4. A support structure for a concrete wall steel cage of a nuclear power plant as claimed in claim 3, It is characterized in that The spacing distance of the U-shaped grooves is set according to the preset spacing of the supporting steel bars.

5. A construction method for a concrete wall steel cage of a nuclear power plant, It is characterized in that A support structure for a steel cage of a concrete wall of a nuclear power plant according to any one of claims 1 to 4, wherein the specific steps are as follows: Connect the external lateral support members to the steel mesh of the wall reinforcement cage; Connect one side of the manufactured internal limit support member to the steel mesh to which the external lateral support member has been tied; and tie the steel mesh on the other side of the internal limit support member; Install node reinforcements on the steel mesh; Install the external lateral support member on the steel mesh on the other side; After re-measurement and adjustment of the deviation of the wall reinforcement cage, hoist it into place and connect the reinforcement joint sleeve; Install anchor bolts between supports and base plate, install wall formwork, and pour concrete.

6. A construction method for a nuclear power plant concrete wall reinforcement cage as claimed in claim 5, It is characterized in that The support member of the lateral support member is bolted to the steel mesh in the wall steel cage.

7. A construction method for a nuclear power plant concrete wall reinforcement cage as claimed in claim 5, It is characterized in that The fixing parts in the internal position-limiting support member are welded to the supporting steel bars in the wall steel cage.

8. A construction method for a nuclear power plant concrete wall reinforcement cage as claimed in claim 5, It is characterized in that Remove the support members after the concrete reaches the required strength, or retain the support members and remove them after all wall construction is completed.

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