Stainless steel cladding mounting structure and mounting method therefor, and spent fuel pool

Abstract

Disclosed in the present invention are a stainless steel cladding mounting structure and a mounting method therefor, and a spent fuel pool. The stainless steel cladding mounting structure comprises a cladding panel, at least one engagement rail arranged on a first surface of the cladding panel facing a concrete inner wall face, and an engagement groove engaged with the engagement rail and configured to be fixed to the concrete inner wall face, wherein the engagement rail corresponds to the side of a weld seam of the cladding panel, and a leakage detection groove enclosing the outer side of the weld seam is formed inside the engagement rail; in a pool, the cladding panel is vertically arranged and is fitted against the outer surface of the engagement groove, and the engagement rail is engaged in the engagement groove. In the present invention, a mounting structure is formed by mounting the cladding panel on faces such as concrete through the engagement of the engagement rail and the engagement groove, thereby realizing mounting of the cladding panel in the pool. The cladding panel and components such as the engagement rail and the engagement groove, and the fixation of the engagement rail on the cladding panel can all be prefabricated in a workshop, thereby achieving modularization, which in turn reduces the workload on a construction site and reduces on-site construction safety risks, achieving the aim of optimizing the construction progress and improving the construction quality.

Description

Stainless steel cladding installation structure and installation method thereof, spent fuel pool Technical Field

[0001] The present invention relates to the technical field of nuclear facilities, and in particular to a stainless steel cladding installation structure and an installation method thereof, and a spent fuel pool. Background Art

[0002] Large, long-term water storage tanks at nuclear power plants typically have a stainless steel cladding applied to the concrete surface to prevent leakage. The cladding is welded on-site from multiple flat stainless steel plates, with support structures and leak monitoring and collection tanks (detection devices) located behind each weld.

[0003] From a construction perspective, existing steel cladding can be categorized as post-applied and pre-applied. Post-applied steel cladding involves first pouring the concrete structure, then installing the stainless steel pool cladding support frame and applying mortar plastering. Finally, the stainless steel cladding panels are welded to the stainless steel pool cladding support frame. Pre-applied steel cladding involves prefabricating the stainless steel pool cladding submodules in a workshop and assembling or installing them on-site before back-concrete pouring or grouting.

[0004] The on-site construction process for post-application steel cladding is cumbersome and can only be done serially. This results in a small construction space, low efficiency, long construction periods, and long-term resource occupation. Large-scale tank construction involves extensive overhead work, making it difficult to guarantee the quality of steel cladding welding on the first try, and also detrimental to the physical and mental health of construction workers. In pre-application steel cladding, because the cladding panels are generally thin and have poor rigidity, deformation during welding, transportation, and hoisting is difficult to control, resulting in poor surface flatness of the prefabricated steel cladding modules. Furthermore, as formwork, it is cast and fixed along with the concrete structure, further exacerbating deformation, resulting in poor precision tolerances for the construction of stainless steel tank steel cladding. Therefore, pre-application steel cladding is generally not used for large, safe, and important stainless steel tanks, such as spent fuel pools. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a stainless steel cladding installation structure suitable for a spent fuel pool and an installation method thereof, and a spent fuel pool realized by the installation structure.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: providing a stainless steel cladding installation structure, comprising a cladding panel for installation on the concrete inner wall surface of a pool and formed by welding a plurality of stainless steel plates, at least one rail provided on a first surface of the cladding panel facing the concrete inner wall surface, and a slot cooperating with the rail and used for fixing to the concrete inner wall surface;

[0007] The weld between the stainless steel plates extends along the height direction of the cover plate, the rail corresponds to one side of the weld, and a leak detection groove surrounding the outside of the weld is formed inside the rail;

[0008] In the pool, the cover plate is vertically arranged and fits with the outer surface of the slot, and the rail is fitted in the slot.

[0009] Preferably, the rail comprises a steel plate and a channel steel; the channel steel is fixed to the steel plate with a U-shaped groove facing away from the steel plate;

[0010] The rail is oriented toward and fixed on the first surface of the covering panel with the channel steel; wherein the legs on both sides of the U-shaped groove of the channel steel are respectively located on opposite sides of the weld and are connected to the stainless steel plates on both sides of the weld; the U-shaped groove of the channel steel forms the leak detection groove.

[0011] Preferably, the slot comprises two angle steels spaced apart and arranged opposite to each other, each of the angle steels being fixed to the inner wall surface of the concrete by at least one set of connecting components; the space between the two angle steels is used for the rail to fit therein;

[0012] The side of the angle steel facing away from the inner wall of the concrete forms the outer surface of the slot.

[0013] Preferably, each set of connection components includes a first anchoring angle steel sheet and a first expansion bolt;

[0014] One end of the first anchoring angle steel piece is connected to the angle steel, and the other end of the first anchoring angle steel piece is fitted on the inner wall surface of the concrete and fixed on the inner wall surface of the concrete by the first expansion bolt.

[0015] Preferably, the stainless steel covering installation structure further includes a plaster layer, the plaster layer is coated on the inner wall surface of the concrete outside the slot, and the covering panel is in contact with the plaster layer.

[0016] Preferably, the stainless steel cladding installation structure further includes a filling layer formed between the rail and the slot by grouting and integrally connected to the concrete inner wall surface.

[0017] Preferably, the stainless steel cladding installation structure further comprises a skeleton support structure, which is arranged on the inner wall surface of the concrete and corresponds to the connection between two adjacent cladding panels.

[0018] Preferably, the skeleton support structure includes a first U-shaped channel steel and a second U-shaped channel steel, the second U-shaped channel steel is buckled into the first U-shaped channel steel, and the opposite sides of the first U-shaped channel steel are respectively fixed to the inner wall surface of the concrete by a second anchor angle steel sheet and a second expansion bolt;

[0019] The first U-shaped channel steel is welded to two adjacent cladding plates with its two end portions, and the second U-shaped channel steel is welded to two adjacent cladding plates with its surface facing away from the first U-shaped channel steel.

[0020] The present invention also provides a method for installing a stainless steel cladding installation structure, comprising the following steps:

[0021] S1, prefabricated covering panels, each covering panel having a rail on the first surface;

[0022] S2. Adding a fixing frame to the second surface of the covering panel to enhance the rigidity of the covering panel;

[0023] S3. Hoist the covering panel with the fixed frame and place it in the pool in a vertical state;

[0024] Each concrete inner wall surface of the pool is pre-installed with a slot; when in place, the rail of the cover panel is aligned above the slot, and when the cover panel is lowered, the rail slides from top to bottom into the slot;

[0025] S4, extending the grouting hose into the bottom of the card slot, and pouring grout into the card slot through the grouting hose, so that the grout is densely filled layer by layer from bottom to top between the card rail and the card slot;

[0026] During grouting, the outlet of the grouting hose is kept below the grouting surface;

[0027] After solidification, the slurry forms a filling layer and is connected to the inner wall surface of the concrete as a whole.

[0028] Preferably, in step S3, a plaster layer is pre-applied on the inner wall surface of the concrete, and the plaster layer is located outside the slot; after the covering panel is in place, the first surface of the covering panel is in contact with the plaster layer.

[0029] Preferably, in step S3, when in position, multiple positioning points are selected on the fixed frame, and the positioning points are respectively supported by jacks to push the covering panel until it is close to the plaster layer.

[0030] Preferably, in step S4, during grouting, the height of each layer of slurry poured gradually is ≤2m; and the pouring of the next slurry layer is carried out after the previous poured slurry layer hardens.

[0031] Preferably, in step S2, a plurality of fixing points are provided on the fixing frame, suction cups are installed on the fixing points, and the fixing frame is adsorbed on the second surface of the cover panel through the suction cups.

[0032] The present invention also provides a spent fuel pool, comprising a pool body formed of concrete and a plurality of covering panels; the pool body has a plurality of concrete inner wall surfaces, each of the covering panels corresponds to one of the concrete inner wall surfaces, and the plurality of covering panels are connected in sequence;

[0033] Each of the covering panels is provided with at least one rail on the first surface facing the concrete inner wall surface, the rail corresponds to one side of the weld on the covering panel, and a leak detection groove surrounding the outside of the weld is formed inside the rail; the concrete inner wall surface is provided with a groove adapted to the rail, and the covering panel is fixed to the concrete inner wall surface in the groove through the rail.

[0034] Preferably, the spent fuel pool further comprises a plaster layer, which is coated on the inner wall surface of the concrete outside the slot, and the covering panel is in contact with the plaster layer.

[0035] Preferably, the spent fuel pool further comprises a filling layer formed between the rail and the slot by grouting and integrally connected to the inner wall surface of the concrete.

[0036] The stainless steel cladding mounting structure of the present invention utilizes stainless steel sheet (referred to as steel sheet) cladding panels, which are installed on a surface such as concrete using rails and slots. This structure allows for the cladding panels to be installed within a pool. The cladding panels, rails, slots, and other components, as well as the rails' attachment to the cladding panels, can all be prefabricated in a workshop, achieving modularity. This reduces on-site workload and safety risks, thereby optimizing construction schedules and improving quality.

[0037] The stainless steel cladding installation structure of the present invention is suitable for spent fuel pools and meets the construction accuracy requirements of safety-critical pools such as spent fuel pools. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0039] FIG1 is a schematic diagram of the three-dimensional structure of a plurality of cladding panels in a stainless steel cladding installation structure according to an embodiment of the present invention;

[0040] FIG2 is a schematic diagram of the matching structure of the clamping rail and the clamping slot in the stainless steel cladding installation structure according to an embodiment of the present invention;

[0041] 3 is a schematic cross-sectional view of a stainless steel cladding mounting structure on a concrete inner wall surface according to an embodiment of the present invention;

[0042] 4 is a schematic structural diagram of a fixing frame used in an installation method of a stainless steel cladding installation structure according to an embodiment of the present invention;

[0043] FIG5 is a schematic diagram of a skeleton support structure in a stainless steel cladding installation structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0045] The stainless steel cladding mounting structure of the present invention is used to be installed in a water pool, forming a steel cladding on the inner wall of the water pool to prevent liquid leakage. Water pools include but are not limited to storage pools (such as spent fuel pools) in nuclear power plants.

[0046] As shown in FIG1 to FIG3 , a stainless steel cladding installation structure according to an embodiment of the present invention includes a cladding panel 100 , at least one rail 10 and at least one slot 20 , wherein the rail 10 and the slot 20 are adapted to be arranged.

[0047] The cladding panel 100 is formed by welding together several stainless steel plates 101. The entire panel can be a polygonal plate (e.g., a square plate). The stainless steel plates 101 are primarily joined along the width of the cladding panel 100. The joint line between the stainless steel plates 101 corresponds to the length of the stainless steel plates 101 and also corresponds to the height of the cladding panel 100. The joint line is welded to form a weld seam 102. Thus, the weld seam 102 is formed between adjacent stainless steel plates 101 and extends along the height of the cladding panel 100. The length of the weld seam 102 is consistent with the height of the cladding panel 100.

[0048] The cladding panel 100 is designed to be installed on the concrete inner wall 200 of a pool. The cladding panel 100 has a first surface and a second surface facing each other, with the first surface facing the concrete inner wall 200. A rail 10 is disposed on the first surface of the cladding panel 100, corresponding to one side of the weld 102 and wrapping around the outside of the weld 102. A leak detection groove 13 is formed within the rail 100, surrounding the outside of the weld 102. The rail 10 can be fixed to the cladding panel 100 by welding or other means during prefabrication of the cladding panel 100 in a workshop, creating a modular design.

[0049] Specifically, structurally, the rail 10 may include a steel plate 11 and a channel steel 12; the channel steel 12 is fixed (e.g., by welding) to the steel plate 11 with its back facing the steel plate 11 in a U-shaped groove. The channel steel 12 is U-shaped in cross section, with its internal space being a U-shaped groove. The two ends of the channel steel 12 are located on either side of the U-shaped groove, also forming the two legs of the channel steel 12. On the covering panel 100, the rail 10 is fixed to the first surface of the covering panel 100 with the channel steel 12 facing it; the legs on either side of the U-shaped groove of the channel steel 12 are located on opposite sides of the weld 102, and are connected to the stainless steel plates 101 on either side of the weld 102 (i.e., the two adjacent stainless steel plates 101) by welding or other means; the U-shaped groove of the channel steel 12 forms a leak detection groove 13.

[0050] The formation of the leak detection groove 13, when the weld 102 leaks, the leaked liquid can be concentrated in the leak detection groove 13. At the same time, it is also beneficial to perform leak detection work through the leak detection groove 13.

[0051] On the cladding panel 100, the length of the rail 10 (including the steel plate 11 and the channel steel 12) extends along the height of the cladding panel 100 and also along the height of the weld 102. The length of the rail 10 can be set to be the same as the length of the weld 102; alternatively, the length of the rail 10 can be slightly shorter than the length of the weld 102. The upper and lower ends of the rail 10 are respectively connected to the transverse channel steel 12 welded to the upper and lower ends of the cladding panel 100.

[0052] The width of the steel plate 11 is set to be greater than the width of the channel steel 12. When the two are connected, the opposite ends of the steel plate 11 protrude outside the opposite sides of the channel steel 12.

[0053] The slot 20 is mounted and fixed to the concrete inner wall 200 of the pool, and is adapted to engage with the rail 10. The cladding panel 100 is secured to the concrete inner wall 200 by the rail 10 engaging with the slot 20. Within the pool, the cladding panel 100 is vertically positioned and aligned with the outer surface of the slot 20, and the rail 10 engages within the slot 20.

[0054] The slot 20 may include two angle steels 21 spaced apart from each other, arranged at right angles to each other. The length of the angle steels 21 corresponds to the length of the rail 10 and extends along the height of the concrete inner wall 200. Each angle steel 21 is secured to the concrete inner wall 200 via at least one set of connecting components; the space between the two angle steels 21 allows the rail 10 to fit within it. The side of the angle steels 21 facing away from the concrete inner wall 200 forms the outer surface of the slot 20, within which the rail 10 fits.

[0055] Each set of connection components may further include a first anchoring angle steel sheet 22 and a first expansion bolt 23; one end of the first anchoring angle steel sheet 22 is connected to the angle steel 21, and the other end of the first anchoring angle steel sheet 22 is fitted on the concrete inner wall surface 200 and fixed on the concrete inner wall surface 200 by the first expansion bolt 23.

[0056] In the height direction of the slot 20, each angle steel 21 is fixed to the concrete inner wall surface 200 through a plurality of connecting components. The plurality of connecting components are distributed at intervals along the height direction of the angle steel 21.

[0057] Furthermore, the width of the internal space of the slot 20 (i.e., the interval between the two angle steels 21) is set to be greater than the maximum width of the rail 10, so that the rail 10 can slide up and down in the slot 20, and there is also sufficient gap between the rail 10 and the slot 20 for grouting. The slurry is densely filled between the rail 10 and the slot 20, and the rail 10 and the slot 20 are buried on one side of the concrete inner wall 200 to realize the load transfer function.

[0058] Furthermore, the stainless steel cladding installation structure of the present invention further includes a plaster layer 30 and a filling layer 40 formed by grouting.

[0059] The plaster layer 30 is coated on the concrete inner wall surface 200 outside the slot 20 , and the outer surface of the plaster layer 30 is flush with the outer surface of the slot 20 ; the covering panel 100 is in contact with the outer surface of the slot 20 and also in contact with the plaster layer 30 .

[0060] The filling layer 40 is densely filled between the rail 10 and the slot 20 by grouting, and after hardening, is connected to the concrete inner wall 200. The setting of the filling layer 40 also buries the rail 10 and the slot 20 therein and improves the stability of the cover plate 100 on the concrete inner wall 200.

[0061] The installation method of the stainless steel cladding installation structure of the present invention, with reference to FIG1 to FIG3 , may include the following steps in some embodiments:

[0062] S1 . Prefabricated covering panels 100 . Each covering panel 100 has a rail 10 on its first surface.

[0063] The covering panel 100, the rail 10 and the slot 20 are all prefabricated in the workshop. The rail 10 is fixed to the first surface of the covering panel 100 by welding. The slot 20 is installed on the concrete inner wall 200 of the on-site pool after being transported to the site.

[0064] When welding the rail 10, the covering plate 100 is cooled by water circulation cooling, that is, a water tank is set under the weld pad to quickly cool down the plate by flowing water, thereby reducing welding deformation.

[0065] S2. A fixing frame 300 is added to the second surface of the covering panel 100 to enhance the rigidity of the covering panel 100 .

[0066] As shown in Figure 4 , the fixing frame 300 is configured to correspond to the outer perimeter of the cladding panel 100, for example, in a rectangular shape. The fixing frame 300 is formed by welding a plurality of horizontal bars 301 and vertical bars 302. The fixing frame 300 is provided with multiple fixing points, each of which is equipped with suction cups (not shown). These suction cups attach the fixing frame 300 to the second surface of the cladding panel 100. These fixing points include, but are not limited to, the diagonal corners of the fixing frame 300, the ends and center of each horizontal bar 301, and the ends and center of each vertical bar 302.

[0067] The installation of the fixing frame 300 on the second surface of the cladding panel 100 enhances the rigidity of the cladding panel 100 and prevents the cladding panel 100 from being deformed during hoisting and transportation.

[0068] The fixing frame 300 can be installed in a workshop, reducing the construction process on site and improving efficiency. Alternatively, the fixing frame can be installed on site after the cover plate 100, the slot 20, etc. are transported to the site.

[0069] S3. The covering panel 100 with the fixing frame 300 is hoisted and positioned in the pool in a vertical state.

[0070] Step S3 is primarily performed on-site. Each cladding panel 100, attached to a fixed frame 300, is hoisted into the pool. During hoisting, a counterweight adjustment device (not shown) installed on the fixed frame 300 ensures that the cladding panel 100 remains vertical. One cladding panel 100 is installed on each concrete inner wall 200 of the pool.

[0071] Each concrete inner wall surface 200 of the pool is pre-installed with a slot 20. After the slot 20 is installed, a plaster layer 30 is applied to the concrete inner wall surface 200. The plaster layer 30 is located outside the slot 20 and the outer surface of the plaster layer 30 is flush with the outer surface of the slot 20, as shown in Figure 3.

[0072] When hoisting the cladding panel 100 into position, align the panel's rails 10 over the slots 20 above the pool. When lowering the cladding panel 100, the rails 10 slide from top to bottom into the slots 20. Multiple positioning points are selected on the fixed frame 300, and jacks are used to support each of these points, pushing the cladding panel 100 until it rests against the plaster layer 30.

[0073] After the covering panel 100 is in place, the first surface of the covering panel 100 is in contact with the outer surface of the slot 20 and the plaster layer 30 .

[0074] After the positioning is completed, grouting is performed to densely fill the gap between the card slot 20 and the card rail 10 with grout.

[0075] S4. Insert the grouting hose into the bottom of the card slot 20, and pour grout into the card slot 20 through the grouting hose, so that the slurry is densely filled between the card rail 10 and the card slot 20 layer by layer from bottom to top.

[0076] Specifically, during grouting, the grouting hose first delivers a certain amount of slurry to the bottom of the slot 20 (also the gap between the slot 20 and the rail 10), forming a first layer of slurry at the bottom of the slot 20. During grouting, the outlet of the grouting hose remains below the grouting surface, ensuring that the delivered slurry is densely filled and unaffected by air or bubbles. After the previous grouting layer hardens, the next slurry layer is poured. Similarly, during grouting, the outlet of the grouting hose remains below the grouting surface, forming slurry layers from bottom to top within the slot 20.

[0077] During grouting, the height of each layer of slurry poured gradually shall be ≤2m; the next layer of slurry shall be poured after the previous layer of slurry has hardened.

[0078] The slurry poured between the rail 10 and the slot 20 forms a filling layer 40 after solidification and is connected to the concrete inner wall 200 as a whole, while also firmly fixing the cover panel 100 on the concrete inner wall 200 and effectively restraining deformation of the module where the cover panel 100 is located.

[0079] The above installation method primarily implements the installation of one cladding panel 100 on one concrete inner wall surface 200 of a pool. The same steps are followed for installing cladding panels 100 on the remaining concrete inner walls 200. By installing multiple cladding panels 100 separately, cladding panels 100 can be installed on all concrete inner walls 200 within the pool. By connecting adjacent cladding panels 100, all cladding panels 100 within the pool can be sequentially connected to form a single, integrated steel cladding.

[0080] 1 and 5 , each of the aforementioned cladding panels 100 is surrounded by double U-shaped channel steels as a skeletal support structure, connected to the inner concrete wall surface 200. This skeletal support structure includes a first U-shaped channel steel 401 and a second U-shaped channel steel 402. The second U-shaped channel steel 402 is smaller in size than the first U-shaped channel steel 401. The second U-shaped channel steel 402 fits within the first U-shaped channel steel 401, placing the first U-shaped channel steel 401 on the outside and the second U-shaped channel steel 402 on the inside.

[0081] Opposite sides of the first U-shaped channel 401 are connected to the concrete inner wall 200 via a plurality of second anchoring angle steel pieces 403 and second expansion bolts 404. The plurality of second anchoring angle steel pieces 403 are spaced apart along the length (and height) of the first U-shaped channel 401. One end of each second anchoring angle steel piece 403 is welded to the outside of the first U-shaped channel 401, and the other end is fastened to the concrete inner wall 200 via at least one second expansion bolt 404.

[0082] During on-site installation, adjacent cladding panels 100 are welded to the upper portion of the skeletal support structure, which serves as a backing plate for the cladding panel welding. During welding, the first U-shaped channel steel 401 is welded to the adjacent cladding panels 100 at its ends, while the second U-shaped channel steel 402 is welded to the adjacent cladding panels 100 with its surface facing away from the first U-shaped channel steel 401. The weld seam 103 between the two cladding panels 100 corresponds to the confines of the skeletal support structure, meaning that the second U-shaped channel steel 402 fits over the weld seam 103.

[0083] The inner space of the second U-shaped channel steel 102 and the space between the first U-shaped channel steel 401 and the second U-shaped channel steel 402 can both serve as leak detection slots. If a weld leaks, the leaked liquid will flow along the inside of the leak detection slots, so the skeleton support structure can realize weld leak detection.

[0084] It can be understood that the present invention is not only applicable to the parallel butt jointing between the covering panels as shown in FIG. 5 , but also applicable to the 90° bend butt jointing between the covering panels.

[0085] Furthermore, the internal space of the skeleton support structure meets the requirements for placing radiographic film. Radiographic holes 104 (as shown in Figure 1) are provided at the horizontal and vertical intersections of the cladding panel 100, providing a radiographic access channel for on-site radiographic inspections. Therefore, the skeleton support structure can simultaneously serve as a welding pad, a radiographic access channel, leak detection, and load transfer.

[0086] The stainless steel cladding installation structure of the present invention is suitable for use in spent fuel pools, enabling installation of cladding panels 100 within the pool. Referring to Figures 1 to 3 , the structure of the spent fuel pool can include a concrete pool body and multiple cladding panels 100. The pool body has multiple concrete inner walls 200, with each cladding panel 100 corresponding to one inner wall, and the multiple cladding panels 100 are sequentially connected.

[0087] The cladding panels 100 have first and second opposing surfaces, with the first surface facing the concrete inner wall 200. Each cladding panel 100 has at least one rail 10 on its first surface facing the concrete inner wall 200. The rail 10 corresponds to one side of the weld seam on the cladding panel 100, and a leak detection groove 13 is formed inside the rail 10, surrounding the outer side of the weld seam. The concrete inner wall 200 is provided with a slot 20 that matches the rail 10. The cladding panel 100 is secured to the concrete inner wall 200 by the rail 10 fitting within the slot 20.

[0088] The specific structure and configuration of the card rail 10 and the card slot 20 are referred to the above related descriptions and will not be repeated here.

[0089] Furthermore, the spent fuel pool includes a plaster layer 30, which is applied to the concrete inner wall surface 200 outside the slot 20. The plaster layer 30 is applied after the slot 20 is installed. Subsequently, the cover panel 100 is positioned on the concrete inner wall surface 200 by fitting the rail 10 within the slot 20. The cover panel 100 is then bonded to the outer surface of the slot 20 and the plaster layer 30.

[0090] The spent fuel pool also includes a filling layer 40, which is formed by solidifying slurry. The slurry is densely filled between the rail 10 and the slot 20 by grouting. After solidification, it is connected to the concrete inner wall surface 200 as a whole, and at the same time, the cover panel 100 is firmly fixed on the concrete inner wall surface 200, effectively restraining the deformation of the module where the cover panel 100 is located.

[0091] On the premise of maintaining the principle of post-pasting construction technology unchanged, a large amount of on-site work is transferred to the factory workshop through the concept of modular advanced construction technology, and parallel and cross-operation are introduced to achieve the purpose of optimizing construction progress, improving construction quality and reducing construction safety risks.

[0092] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structures or equivalent process changes made using the contents of the present invention's description and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A stainless steel cladding installation structure, characterized in that It includes a cladding panel for installation on the concrete inner wall surface of a pool and formed by welding several stainless steel plates, at least one clamping rail provided on a first surface of the cladding panel facing the concrete inner wall surface, and a clamping groove that cooperates with the clamping rail and is used for fixing on the concrete inner wall surface; The weld between the stainless steel plates extends along the height direction of the cladding panel, the clamping rail is correspondingly located on one side of the weld, and a leak detection groove surrounding the outside of the weld is formed inside the clamping rail; Inside the pool, the cladding panel is vertically arranged and fits against the outer surface of the clamping groove, and the clamping rail is fitted inside the clamping groove.

2. The stainless steel clad mounting structure according to claim 1, wherein The clamping rail includes a steel plate and a channel steel; the channel steel is fixed on the steel plate with the U-shaped groove facing away from the steel plate; The clamping rail is fixed on the first surface of the cladding panel with the channel steel facing and fixed thereon; wherein, the legs on both sides of the U-shaped groove of the channel steel are respectively located on opposite sides of the weld and are connected to the stainless steel plates on both sides of the weld; the U-shaped groove of the channel steel forms the leak detection groove.

3. The stainless steel cladding installation structure according to claim 1, characterized in that, The clamping groove includes two angle steels arranged oppositely at intervals, and each angle steel is fixed on the concrete inner wall surface through at least one set of connecting components; the interval between the two angle steels is for the clamping rail to fit therein; The surface of the angle steel facing away from the concrete inner wall surface forms the outer surface of the clamping groove.

4. The stainless steel cladding installation structure according to claim 3, characterized in that, Each set of connecting components includes a first anchoring angle steel sheet and a first expansion bolt; One end of the first anchoring angle steel sheet is connected to the angle steel, the opposite end of the first anchoring angle steel sheet fits against the concrete inner wall surface, and is fixed on the concrete inner wall surface through the first expansion bolt.

5. The stainless steel cladding installation structure according to any one of claims 1 to 4, characterized in that The stainless steel cladding installation structure further includes a plastering layer, the plastering layer is coated on the concrete inner wall surface outside the clamping groove, and the cladding panel fits against the plastering layer.

6. The stainless steel cladding installation structure according to any one of claims 1 to 4, characterized in that The stainless steel cladding installation structure further includes a filling layer formed by grouting between the clamping rail and the clamping groove and connected to the concrete inner wall surface as a whole.

7. The stainless steel cladding installation structure according to any one of claims 1 to 4, characterized in that, The stainless steel cladding installation structure further includes a skeleton support structure, the skeleton support structure is arranged on the concrete inner wall surface and corresponds to the connection part between two adjacent cladding panels; The skeleton support structure includes a first U-shaped channel steel and a second U-shaped channel steel, the second U-shaped channel steel is buckled inside the first U-shaped channel steel, and the opposite sides of the first U-shaped channel steel are respectively fixed on the concrete inner wall surface through a second anchoring angle steel sheet and a second expansion bolt; The two ends of the first U-shaped channel steel are welded to two adjacent cladding panels, and the surface of the second U-shaped channel steel facing away from the first U-shaped channel steel is welded to two adjacent cladding panels.

8. The installation method of the stainless steel cladding installation structure according to any one of claims 1 to 7, characterized in that, It includes the following steps: S1. Prefabricate the cladding panel, and each first surface of the cladding panel is provided with a clamping rail; S2. Add a fixing frame to the second surface of the cladding panel to enhance the rigidity of the cladding panel; S3. Lift and place the cladding panel with the fixing frame in a vertical state in the pool; Each concrete inner wall surface of the pool is pre-installed with a clamping groove; when in place, align the clamping rail of the cladding panel above the clamping groove, and when lowering the cladding panel, the clamping rail slides into the clamping groove from top to bottom; S4. Insert the grouting hose into the bottom of the clamping groove, and grout into the clamping groove through the grouting hose, so that the slurry is densely filled layer by layer from bottom to top between the clamping rail and the clamping groove; During grouting, the outlet of the grouting hose remains below the grouting surface; After the slurry solidifies, a filling layer is formed and connected to the concrete inner wall surface as a whole.

9. The installation method of the stainless steel cladding installation structure according to claim 8, characterized in that, In step S3, a plastering layer is pre-set on the concrete inner wall surface, and the plastering layer is located outside the clamping groove; after the cladding panel is in place, the first surface of the cladding panel is attached to the plastering layer.

10. The installation method of the stainless steel clad installation structure according to claim 9, characterized in that, In step S3, when in place, select a plurality of positioning points on the fixed frame, and use jacks to respectively press against the positioning points to press the cladding panel against the plastering layer.

11. The installation method of the stainless steel cladding installation structure according to claim 8, characterized in that, In step S4, during grouting, the height of each layer of slurry gradually poured ≤ 2m; the next slurry layer is poured after the previously poured slurry layer has hardened.

12. The installation method of the stainless steel cladding installation structure according to any one of claims 8 to 11, characterized in that, In step S2, a plurality of fixing points are arranged on the fixed frame, suction cups are installed at the fixing points, and the fixed frame is adsorbed on the second surface of the cladding panel through the suction cups.

13. A spent fuel pool, characterized in that, It includes a pool body formed of concrete and a plurality of cladding panels; the pool body has a plurality of concrete inner wall surfaces, each of the cladding panels corresponds to one of the concrete inner wall surfaces, and the plurality of cladding panels are connected in sequence; Each first surface of the cladding panel facing the concrete inner wall surface is provided with at least one clamping rail, the clamping rail corresponds to one side of the weld on the cladding panel, and a leak detection groove surrounding the outside of the weld is formed inside the clamping rail; the concrete inner wall surface is provided with a clamping groove adapted to the clamping rail, and the cladding panel is fixed on the concrete inner wall surface by fitting the clamping rail in the clamping groove.

14. The spent fuel pool according to claim 13, wherein, The spent fuel pool further includes a plastering layer, the plastering layer is coated on the concrete inner wall surface outside the clamping groove, and the cladding panel is attached to the plastering layer.

15. The spent fuel pool according to claim 13, characterized in that, The spent fuel pool further includes a filling layer formed by grouting between the clamping rail and the clamping groove and connected to the concrete inner wall surface as a whole.

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