Construction method and disassembly method of detachable component connecting node structure for radiation-proof building

Abstract

The application relates to a construction method and dismounting method of a detachable component connecting node structure of a radiation-proof building, which comprises the following steps: preparing at least two radiation-proof structural components provided with exposed steel skeleton parts at the ends and fixed with butt-joint parts; aligning the butt-joint parts of the two components with each other and locking by fasteners to realize detachable mechanical connection; filling flexible radiation-proof filling materials in the gap formed by the end faces of the two components and the outer side surface of the connecting device to provide continuous radiation shielding; covering sealing devices on the outer side of the flexible radiation-proof filling materials and detachably fixing the sealing devices to seal the gap. Compared with the prior art, the application solves the problems that the existing radiation-proof structure cannot be dismounted, reconstruction is difficult, and the node shielding continuity and mechanical reliability are difficult to be considered, and has the advantages of convenient dismounting and recombination, reliable node radiation shielding and the like.

Description

Technical Field

[0001] This invention relates to the field of building structure and radiation protection construction technology, and in particular to a construction method for a detachable component connection node structure for radiation protection buildings, and a disassembly method for a detachable component connection node structure for radiation protection buildings. Background Technology

[0002] In buildings housing nuclear energy, medical radiotherapy, scientific research accelerators, and nuclear waste treatment facilities, strict requirements are placed on the radiation shielding capabilities of the structures. Traditional radiation shielding structures often employ cast-in-place, thick, heavy-volume concrete walls, effectively shielding against gamma rays and neutron fluxes by incorporating heavy aggregates such as magnetite and barite, or by using lead plates and boron-containing compounds. Cast-in-place concrete radiation shielding walls offer good integrity, with no obvious through-gaps, and when poured densely, they generally achieve ideal continuous radiation shielding. However, these traditional cast-in-place structures are permanent structures; once completed, they are difficult to modify or demolish. With the rapid development of nuclear technology applications and the iterative needs of scientific research, the internal functional zoning and equipment layout of buildings often require updates or adjustments. Permanent shielding structures become a significant constraint, and renovations often involve extensive demolition and reconstruction work, generating massive amounts of radioactive or non-radioactive construction waste, resulting in extremely high costs and long construction periods, severely impacting the normal operation of existing facilities.

[0003] To address the aforementioned issues, existing technologies have proposed several prefabricated radiation shielding structural solutions. Chinese patent document CN206053102U discloses a radiation shielding wall panel and its connection structure. This solution involves placing a layer of copper mesh before and after the steel reinforcement skeleton of a concrete wall panel. The two ends of the copper mesh extend from the left and right ends of the wall panel, respectively. When adjacent wall panels are joined, the corresponding extensions of the copper mesh overlap, and finally, concrete is poured in the joint area to form an integral connection, ensuring the continuity of radiation shielding. However, this connection method still relies on wet-cast concrete consolidation, resulting in permanent nodes in the joint area, making it impossible to achieve disassembly and reuse of the components. Furthermore, the joint is filled with ordinary concrete, whose shielding attenuation capacity for radiation such as gamma rays is far lower than that of the radiation shielding concrete in the component body, inevitably forming weak areas in the radiation shielding at the node area, making it difficult to guarantee the continuity of shielding.

[0004] Chinese patent document CN109680827A discloses a radiation shielding wall structure and construction method for rapid assembly of medical buildings. The scheme adopts a prefabricated splicing main body with a connecting tenon at one end and a connecting groove at the other end. Adjacent main bodies are positioned by interlocking dovetail connecting tenons. The main body is provided with a lead plate layer and a metal wire mesh inside to provide radiation shielding. After on-site splicing, concrete is poured into the built-in steel cage to solidify the whole. The dovetail tenon design of this scheme improves the on-site installation speed to some extent, but it has the following shortcomings: First, the fit between the tenon and the groove is difficult to achieve a complete seal, which will form a through radiation leakage channel, and the joint area is not sealed with special radiation shielding filling material; Second, concrete must be poured into the steel cage for final consolidation, and the joint is essentially a permanent connection. Dismantling will cause serious damage to the main component, making it impossible to achieve true disassembly and reuse; Third, the composite system of lead plate layer and rigid materials such as concrete is prone to separation and cracking at the interface of each material layer under temperature changes, structural deformation or vibration, making it difficult to guarantee the long-term reliability of radiation shielding.

[0005] Currently, the industry has explored some removable radiation shielding solutions, such as using prefabricated lead plates or lead-containing composite panels as removable shielding linings. However, these solutions typically do not participate in the main structural load-bearing capacity, serving only as an additional protective layer and requiring attachment to an independent load-bearing structure. For main structural components that require both load-bearing and shielding functions, achieving reliable mechanical connections and completely continuous radiation shielding at the connection nodes between components remains a technical challenge in engineering. Traditional prefabricated building joints, such as prefabricated concrete components connected by sleeve grouting or bolts, often only fill the joints with ordinary cement mortar or structural adhesive. These filling materials have a much lower radiation attenuation capacity than dedicated radiation-shielding concrete, creating significant weak points for radiation leakage. Ordinary mortar is brittle and has limited bonding strength. Under the micro-deformation caused by component stress, thermal expansion and contraction due to ambient temperature, or long-term equipment vibration, it is prone to developing micro-cracks, which can evolve into penetrating radiation leakage channels. Furthermore, if prefabricated rigid radiation shielding blocks are used to fill the joints, it places almost unattainable demands on the precision of joint processing and on-site installation, and even tiny gaps are difficult to seal. Summary of the Invention

[0006] This invention provides a construction method for a detachable component connection node structure for radiation-proof buildings, which overcomes the problems of existing permanent structures being non-detachable and difficult to renovate, as well as existing detachable solutions being unable to simultaneously guarantee the mechanical load-bearing reliability of nodes and the continuity of radiation shielding, and the filling material being prone to cracking and failure and difficult to reuse.

[0007] The objective of this invention can be achieved through the following technical solutions: The first aspect of this invention provides a construction method for a detachable component connection node structure for radiation-proof buildings, comprising: Prepare at least two radiation shielding structural components, each of which has an exposed steel frame at its end, and the exposed steel frame at its end is fixed with a first or second mating part of a connecting device. Align the first and second mating portions of the exposed steel frames of the two radiation shielding structural members with each other and lock them together with fasteners to detachably connect and fix the two radiation shielding structural members. A flexible radiation shielding material is filled into the gap formed by the end faces of the two radiation shielding structural members and the outer surface of the connecting device to provide continuous radiation shielding. A sealing device is placed over the outside of the flexible radiation-shielding filling material and detachably fixed to the surface of the radiation-shielding structural member to enclose the flexible radiation-shielding filling material within the gap.

[0008] Furthermore, both the first and second docking portions of the connecting device include connecting end plates, which are welded and fixed to the ends of the corresponding exposed portions of the steel frame. A reinforcing member is also fixedly connected between the connecting end plate and the side wall of the corresponding exposed part of the steel frame to enhance the rigidity of the connecting end plate. An anti-slip layer is also provided on the contact surface of the connecting end plate to increase the coefficient of friction; The fastener is a high-strength bolt. The step of locking the two first mating parts and the second mating part includes inserting high-strength bolts and tightening the two connecting end plates.

[0009] Furthermore, the reinforcing member is a plurality of steel plate stiffening ribs, which are distributed circumferentially at intervals along the exposed portion of each steel frame. One side of each steel plate stiffening rib is welded and fixed to the plate surface of the connecting end plate, and the other side is welded and fixed to the outer side wall of the corresponding exposed portion of the steel frame, thereby enhancing the rigidity of the connecting end plate and the integrity of the joint.

[0010] Further, the step of filling the flexible radiation shielding filler material includes: An epoxy resin mixture containing lead particles is injected into the voids, and the mixture is compacted and filled by vibration or pressure. After curing, the mixture forms a solid filler with radiation shielding capability to ensure the continuity of radiation shielding.

[0011] Furthermore, the sealing device includes a cover plate, a sealing element, and a fixing element. The step of covering and securing the sealing device includes: pre-setting the sealing element on the inner edge of the cover plate; The cover plate is strung across the joint of the two mating radiation shielding structural members, so that the sealing element is sandwiched between the surface of the cover plate and the surface of the radiation shielding structural member; The fastener is inserted through the cover plate and fastened to the surface of the radiation shielding structural member or an adjacent structure to detachably fix the cover plate and to press the seal to achieve a seal.

[0012] Furthermore, the sealing element is a rubber sealing strip that is glued and fixed to the inner edge of the cover plate. When the fastener is locked, the rubber sealing strip is compressed and deformed between the surface of the cover plate and the surface of the radiation shielding structural member, thereby achieving a seal between the cover plate and the surface of the radiation shielding structural member.

[0013] Furthermore, the radiation shielding structural component includes a steel-reinforced concrete component, wherein the exposed steel frame portion is the portion of the internal steel frame of the steel-reinforced concrete component extending out of the concrete end face, and the step of providing at least two radiation shielding structural components includes reserving the exposed steel frame portion when prefabricating the steel-reinforced concrete component in the factory, and welding and fixing end plates and reinforcing members to the ends of the exposed steel frame portion.

[0014] A second aspect of the present invention provides a method for disassembling a detachable component connection node structure for a radiation-proof building, wherein the connection node structure is constructed according to the above-described construction method, and the disassembly method includes: Loosen and remove the fasteners that secure the cover plate of the sealing device to the radiation shielding structural member or the surface of an adjacent structure, and remove the cover plate; Remove the flexible radiation-shielding filling material that filled the gaps; Remove the fasteners of the connecting device that connects the two radiation shielding structural components to separate the two radiation shielding structural components.

[0015] Furthermore, the flexible radiation-shielding filler material is a solid filler formed by curing an epoxy resin mixture containing lead particles. The step of removing the flexible radiation shielding filling material includes: removing and recycling the solid filler from the gap in whole or in pieces for the recycling and reuse of the flexible radiation shielding filling material.

[0016] Furthermore, the connecting device includes a connecting end plate welded and fixed to the exposed end of the steel frame and high-strength bolts connecting the connecting end plate. The steps for removing the fasteners include: loosening and removing the high-strength bolts to separate the two connecting end plates, allowing the two radiation shielding structural components to be lifted off the ground to complete the dismantling and reassembly of the components.

[0017] Compared with the prior art, the present invention has the following beneficial effects: By employing a construction process that involves pre-exposing steel frames at the ends of components and securing them with fasteners, standardized and modular mechanical connections and non-destructive disassembly are achieved between the main load-bearing components of radiation-proof buildings. This fundamentally solves the technical barrier of traditional cast-in-place structures being unable to be modified. Compared to cast-in-place structures, buildings constructed using this method have significantly shorter construction cycles for adjusting internal space layouts and updating equipment. Furthermore, the disassembled radiation-proof structural components and connectors can be reused, reducing construction waste and aligning with green building principles.

[0018] By introducing a flexible radiation-shielding filler material followed by a removable sealing device, the problem of radiation shielding continuity in the node area was creatively solved. The flexible material adapts to the irregular and complex gaps in the node area during filling, and can be completely fitted through pressure or tamping processes, fundamentally eliminating potential radiation leakage paths. Its radiation shielding effectiveness is no less than that of the component itself. Simultaneously, its flexibility absorbs the micro-deformation and vibration energy of the component, avoiding the risk of shielding failure due to cracking of ordinary rigid filler materials. The outer sealing device not only provides multiple radiation protection barriers but, more importantly, isolates the filler material from the external environment, preventing it from becoming damp, oxidized, or leaking, and also protects the internal metal connectors from corrosion, significantly improving the long-term durability and reliability of the node. Through the matching of construction and disassembly methods, both the filler material and the sealing device can be removed without damage or with minimal damage, facilitating reuse and component reassembly. Attached Figure Description

[0019] Figure 1 This is a schematic flowchart illustrating the construction method of a detachable component connection node structure for radiation-proof buildings in an embodiment of the present invention.

[0020] Figure 2 This is a partial front view of the connection node structure of the detachable radiation-proof steel-reinforced concrete component in an embodiment of the present invention after construction is completed.

[0021] Figure 3 for Figure 1 A partially enlarged schematic diagram of the connecting device and the sealing device.

[0022] Figure 4 for Figure 1 A partial cross-sectional schematic diagram of the connecting device and sealing device shows the filling position of the flexible radiation shielding filling material.

[0023] In the diagram: 100, radiation shielding structural component; 110, steel-reinforced concrete component; 120, exposed steel frame portion; 200, connecting device; 210, connecting end plate; 220, reinforcing member; 230, fastener; 240, anti-slip layer; 300, sealing device; 310, cover plate; 320, sealing element; 330, fixing element; 400, flexible radiation shielding filling material; 500, adjacent wall; 600, adjacent structural beam. Detailed Implementation

[0024] This invention provides a construction method for a detachable component connection node structure for radiation-proof buildings. The core concept is as follows: Radiation-proof structural components with exposed steel frames and mating parts at their ends are prepared; the mating parts of two components are aligned and locked with fasteners to achieve a detachable mechanical connection; subsequently, a flexible radiation-proof filling material is filled into the gap formed by the end faces of the components and the outer surface of the connecting device to provide continuous radiation shielding; finally, a sealing device is placed over the flexible radiation-proof filling material and detachably fixed to enclose the filling material within the gap, thereby forming a mechanically reliable, continuously shielded, and detachable connection node.

[0025] In specific implementation, both the first and second docking parts of the connecting device include connecting end plates, which are welded and fixed to the ends of the corresponding exposed steel frame portions. A reinforcing member is also fixedly connected between the connecting end plate and the sidewall of the corresponding exposed steel frame portion to enhance the rigidity of the connecting end plate. An anti-slip layer is also provided on the contact surface of the connecting end plate to increase the coefficient of friction. The fastener is a high-strength bolt, and the locking step includes inserting the high-strength bolt and tightening both connecting end plates.

[0026] In specific implementation, the step of filling the flexible radiation shielding filler material includes injecting an epoxy resin mixture containing lead particles into the voids, and compacting or pressurizing the mixture to fill the voids densely. After curing, the mixture forms a solid filler with radiation shielding capability.

[0027] In specific implementation, the sealing device includes a cover plate, a sealing element, and a fixing element. The step of covering and fixing the sealing device includes: pre-setting the sealing element on the inner edge of the cover plate; bridging the cover plate across the joint of the two mating radiation shielding structural members, so that the sealing element is sandwiched between the surface of the cover plate and the surface of the radiation shielding structural member; and inserting and fastening the fixing element through the cover plate to detachably fix the cover plate and press the sealing element.

[0028] In specific implementation, the radiation shielding structural component includes a steel-reinforced concrete component, the exposed steel frame portion being the portion of the internal steel frame of the steel-reinforced concrete component extending out of the concrete end face, and the step of providing at least two radiation shielding structural components includes reserving the exposed steel frame portion when prefabricating the steel-reinforced concrete component in the factory, and welding and fixing end plates and reinforcing members to the ends of the exposed steel frame portion.

[0029] This invention also provides a method for disassembling a detachable component connection node structure for radiation-proof buildings. The connection node structure is constructed according to any of the above-described construction methods. The disassembly method includes: loosening and removing the fasteners that fix the cover plate of the sealing device to the surface of the radiation-proof structural component or an adjacent structure, and removing the cover plate; removing the flexible radiation-proof filling material filling the gaps; and removing the fasteners of the connecting device connecting two radiation-proof structural components to separate the two components. This method achieves non-destructive or minimal-destructive disassembly of the components and material recycling, facilitating facility renovation and component reuse.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, circuit structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0031] Example 1 This embodiment provides a construction method for a detachable component connection node structure for radiation-proof buildings. See [link to relevant documentation]. Figure 1 The core concept for solving the technical problem lies in: pre-reserving steel frames at the ends of the radiation-shielding structural components that need to be connected, forming an installation foundation; utilizing a detachable mechanical connection device to achieve a direct and reliable mechanical connection between the components; filling all irregular gaps in the connection node area with flexible radiation-shielding material to eliminate radiation leakage paths; and finally, completely sealing the flexible material with a detachable sealing cover, forming a mechanically reliable, continuously shielded, and removable / reassembleable complete node. The final node structure formed by this method is referenced... Figures 2 to 4 .

[0032] The construction method in this embodiment includes the following steps: Prepare 100 radiation shielding structural components: At least two radiation shielding structural components 100 are provided, each radiation shielding structural component 100 having an exposed steel frame portion 120 at its end, and the end of the exposed steel frame portion 120 being fixedly provided with a first docking portion or a second docking portion of a connecting device 200.

[0033] Specifically, the radiation-shielding structural component 100 is the basic unit forming the main body of the radiation-shielding building, such as radiation-shielding wall panels, radiation-shielding columns, or radiation-shielding beams. Its main body is preferably a steel-reinforced concrete component 110, that is, a composite material component formed by casting and compacting in a factory based on a steel (steel frame) framework. The concrete material uses special radiation-shielding concrete, for example, barite concrete prepared using barite as coarse and fine aggregate, which has excellent attenuation effects on gamma rays. Boron-containing compounds (such as borax and calcium borate) can also be added to the concrete according to the requirements for shielding neutron flux. The steel frame, or steel skeleton, can be made of Q355B grade structural steel, and its form can be flexibly selected according to the stress requirements. In this embodiment, welded box-type steel pipes are used, with a wall thickness ranging from 16mm to 40mm. Several shear studs are welded to the surface of the steel skeleton embedded in the concrete to enhance the cooperative working ability between the steel skeleton and the concrete.

[0034] The exposed steel frame portion 120 refers to a section of exposed steel formed when the internal steel frame (box-type steel pipe) is intentionally extended outward from the concrete end face during the factory prefabrication of the steel-reinforced concrete component 110. This extension length L should provide sufficient space for connection operations, typically ranging from 300mm to 800mm. If L is less than 300mm, there may be insufficient space for fasteners 230, making tightening with tools impossible. If L exceeds 800mm, the exposed steel frame section is too long, making it prone to collision and deformation during transportation and hoisting, and resulting in steel waste. The exposed steel frame portion 120 serves to provide a solid and reliable steel structure installation foundation for the connecting device 200, allowing force flow between components to be directly transmitted through the steel structure path. The four sides of the exposed steel frame portion 120 must undergo rust removal and sandblasting treatment before welding to achieve a cleanliness level of Sa2.5.

[0035] The first and second mating parts of the connecting device 200 are both fixed to the ends of the exposed steel frame 120 during the factory prefabrication stage. Each mating part includes a connecting end plate 210 and a reinforcing member 220. The connecting end plate 210 is a rectangular steel plate with a planar dimension slightly larger than the cross-sectional dimension of the exposed steel frame 120. It is fixedly welded to the end of the exposed steel frame 120 by a full penetration butt weld or a high-strength fillet weld. The thickness of the connecting end plate 210 should not be less than the wall thickness of the steel frame it is welded to, typically 25mm to 50mm. If the thickness is less than 25mm, the end plate stiffness is too low, and warping may occur under the bolt preload, leading to separation of the contact surface. If the thickness is greater than 50mm, the amount of steel used increases excessively, reducing economy and increasing welding residual stress. Its material is the same as the steel frame, which is Q355B grade steel. On the surface of the connecting end plate 210, a ring of bolt holes for high-strength bolts is precisely opened around the perimeter of the steel frame.

[0036] Align and lock the mating parts of the two components: Two radiation-shielding structural components 100 are hoisted into place, aligning the first mating portion of the exposed steel frame 120 with the connecting end plates 210 of the second mating portion. In this step, the front faces of the two connecting end plates 210 are pressed together. To ensure the anti-slip capability of the connection, an anti-slip layer 240 is also applied to the contact surface of the connecting end plates 210 to increase the coefficient of friction. A specific implementation of the anti-slip layer 240 involves sandblasting followed by coating with an inorganic zinc silicate primer. First, the contact surface of the connecting end plates 210 is sandblasted or shot-blasted to form a surface roughness Rz of 50μm~100μm. If the roughness is too low, the improvement in the coefficient of friction is not significant; if it is too high, it may crush the surface micro-peaks under high preload, thus reducing the anti-slip coefficient. Then, an inorganic zinc silicate primer is immediately sprayed. This coating not only provides corrosion protection, but its inherent rough texture also effectively improves the coefficient of friction. Another alternative implementation is to perform surface machining on the contact surface of the connecting end plate 210 to form dense, crisscrossing serrations with a depth of 0.5 mm to 1.0 mm.

[0037] Fastener 230 is used for locking. In this embodiment, the fastener 230 is a pair of high-strength hexagonal head bolts for steel structures, with specifications such as M24 or M30. The high-strength bolts are inserted into the aligned bolt holes on the two connecting end plates 210 and tightened with a specified preload, thereby generating a large normal clamping force between the contact surfaces of the two connecting end plates 210. Through friction, the shear load is shared, forming a reliable friction-type high-strength bolt connection, safely and tightly connecting the two radiation shielding structural components 100 into one unit, while retaining the ability to disassemble without damage by loosening the bolts.

[0038] To improve the out-of-plane bending stiffness of the connecting end plate 210 and prevent it from warping under bolt preload or external force, a reinforcing member 220 is fixedly connected between the connecting end plate 210 and the side wall of the corresponding exposed steel frame portion 120. In this embodiment, the reinforcing member 220 is specifically a plurality of steel plate stiffening ribs, the thickness of which is typically 10mm to 20mm. The plurality of steel plate stiffening ribs are distributed circumferentially at intervals along each exposed steel frame portion 120. Each steel plate stiffening rib is a right trapezoid or a right triangle. One right-angled side is attached to the plate surface of the connecting end plate 210 and fixed by double-sided fillet weld, and the other side is attached to the outer side wall of the corresponding exposed steel frame portion 120 and fixed by fillet weld, forming a stable triangular support structure, which effectively converts the bending moment borne by the connecting end plate 210 into shear force on the exposed steel frame portion 120.

[0039] 400g of flexible radiation shielding filler material: After the two radiation shielding structural components 100 are locked together, their concrete end faces, the side walls of the exposed steel frame 120, and the outer ring of the connecting end plate 210 will together form an annular, irregular U-shaped or V-shaped gap. This step involves filling this gap with flexible radiation shielding material 400 to provide continuous radiation shielding. Here, "flexible" refers to the material retaining a certain degree of elastic-plastic deformation capacity after filling and curing; for example, its elastic modulus is much lower than that of concrete, while its elongation is significantly higher, thus enabling it to accommodate small relative displacements between components without causing cracks.

[0040] The flexible radiation-shielding filling material 400 is a functional material whose function is to adaptively fill irregular gaps and provide radiation shielding equivalent to that of the component body. This embodiment provides at least two specific implementation methods: One approach involves using existing epoxy resin mixtures containing lead particles. Lead particles with a diameter between 0.5 mm and 3 mm are incorporated into an existing low-viscosity epoxy resin solution at a volume ratio of 40% to 60%, and after thorough stirring, a high-density paste-like mixture is formed. If the lead particle size is less than 0.5 mm, the specific surface area is too large, requiring an increase in resin dosage and reducing the mixture density; if it is greater than 3 mm, it is prone to settling in the mixture, causing uneven filling. Lead has a high atomic number and a strong ability to attenuate gamma rays; epoxy resin, as a binder, provides good toughness and sealing properties after curing.

[0041] Another approach is to use existing flexible epoxy resin mortar with added barite powder. Using barite powder of 300 mesh or finer as fine aggregate to replace ordinary quartz sand, and mixing it with existing flexible epoxy resin, the apparent density can reach 2.8 g / cm³. 3 The above applies to situations where neutron shielding has certain requirements.

[0042] The filling process involves injecting the paste-like mixture under pressure through the pre-reserved injection port into the voids, or filling it manually, and then compacting it with a vibrator or attached vibrator, or using pressurized grouting to ensure that the mixture completely and densely fills the entire cavity without air bubbles or voids. After the mixture cures at room temperature, it forms a solid filler with radiation shielding capabilities and bonds tightly to the surrounding steel and concrete surfaces.

[0043] Install sealing device 300: After the flexible radiation shielding filling material 400 is filled and cured, the sealing device 300 is covered on the outside of the flexible radiation shielding filling material 400 and detachably fixed to the surface of the radiation shielding structural member 100, so as to seal the flexible radiation shielding filling material 400 in the gap, thereby playing a protective, additional shielding and aesthetic role.

[0044] The sealing device 300 includes a cover plate 310, a sealing element 320, and a fixing element 330. The specific installation steps are as follows: The sealing element 320 is pre-installed on the inner edge of the cover plate 310. In this embodiment, the sealing element 320 is specifically implemented as a rubber sealing strip that is glued and fixed to the inner edge of the cover plate 310. Its cross-section is D-shaped or rectangular, and the material is preferably EPDM rubber or neoprene rubber, which has good weather resistance and elastic recovery rate. As another optional implementation, high-performance silicone sealant can also be applied to the edge joints of the cover plate 310 after installation, which forms an elastic sealing layer after curing.

[0045] A cover plate 310 with a sealing element 320 is bridging the joint between two mating radiation shielding structural members 100, such that the sealing element 320 is sandwiched between the cover plate 310 and the surface of the radiation shielding structural member 100. The shape of the cover plate 310 matches the outer contour of the component; in this embodiment, it is a right angle shape, welded from two rectangular Q235B steel plates, with a thickness of 4mm to 8mm. If the cover plate thickness is less than 4mm, its rigidity is insufficient, and it is prone to buckling deformation between fixing points, affecting the sealing effect; if it is greater than 8mm, its weight is too large, making it inconvenient for a single person to disassemble.

[0046] The fastener 330 is inserted through the pre-drilled mounting holes on the cover plate 310 and secured to the surface of the radiation shielding structural member 100 or an adjacent structure (such as a wall or floor slab). The fastener 330 is a detachable stainless steel expansion bolt or a self-cutting anchor. During the tightening of the fastener 330, the rubber sealing strip is uniformly compressed and deformed, and its elastic force tightly adheres to the surface of the member 100, thereby blocking the penetration path of external moisture and air into the node and achieving a reliable seal between the cover plate 310 and the surface of the member 100.

[0047] This embodiment successfully constructed a mechanically reliable, continuously shielded, and fully detachable node. The force flow path between components is clear: external loads act on the components, are transferred to the internal steel frame, and then through the exposed steel frame 120 and welds to the connecting end plate 210 and reinforcement 220. Finally, through the frictional shear resistance between the connecting end plates 210 and the tensile strength of the high-strength bolts, the force is completely transferred to the other component. Regarding radiation shielding, the flexible radiation-shielding filling material 400, in its initial paste or fluid form, adaptively fills the complex cavity, forming a seamless shield after curing, completely eliminating radiation leakage paths. The outer sealing device 300 provides physical protection and a second layer of shielding, ensuring the long-term durability of the node.

[0048] Example 2 Based on the construction method described in Example 1, both the first and second mating portions of the connecting device 200 include connecting end plates 210, which are welded and fixed to the ends of the corresponding exposed steel frame portions 120. The locking step specifically involves inserting and tightening high-strength bolts (serving as fasteners 230) through the bolt holes on the two mating connecting end plates 210, applying a specified preload. In this embodiment, to further enhance the rigidity of the connecting end plates 210 and the overall integrity of the joint, a reinforcing member 220 is fixedly connected between the connecting end plates 210 and the sidewalls of the corresponding exposed steel frame portions 120. An anti-slip layer 240 is also provided on the contact surface of the connecting end plates 210 to increase the coefficient of friction and prevent relative sliding under shear force. The additional effect of adding the reinforcing member 220 and the anti-slip layer 240 is that it improves the anti-slip capability and rigidity stability of the joint under dynamic or alternating loads, making the mechanical connection more reliable.

[0049] Example 3 Based on Embodiment 2, the reinforcing member 220 consists of multiple steel plate stiffeners, which are distributed circumferentially along the exposed portion 120 of each steel frame. Each steel plate stiffener is a right-angled trapezoidal or triangular steel plate, with one right-angled side welded to the surface of the connecting end plate 210 via a double-sided fillet weld, and the other right-angled side welded to the outer wall of the corresponding exposed portion 120 of the steel frame via a fillet weld. This circumferentially distributed structure with triangular supports can most effectively convert the bending moment generated by the eccentric load on the connecting end plate 210 into shear force on the exposed portion 120 of the steel frame, forming a stable closed-loop force flow and maximally limiting the out-of-plane deformation of the end plate.

[0050] Example 4 Based on the construction method described in Example 1, the specific steps of filling the flexible radiation shielding filler material 400 in this example include: injecting an epoxy resin mixture containing lead particles into the gap formed by the two component end faces and the outer surface of the connecting device 200 through a pre-reserved injection port, and then compacting the mixture to fill the gap by inserting a vibrator or by pressurized injection. After the mixture cures at room temperature, it forms a solid filler with radiation shielding capability. This filling method ensures that the final solid filler can completely fit every corner of the complex cavity, guaranteeing the continuity of radiation shielding.

[0051] Example 5 Based on the construction method described in Example 1, the sealing device 300 includes a cover plate 310, a sealing element 320, and a fixing element 330. The specific steps include: first, pre-attaching the sealing element 320 to the inner edge of the cover plate 310; then, spanning the joint of two mating radiation-shielding structural members 100, so that the sealing element 320 is sandwiched between the surfaces of the cover plate 310 and the radiation-shielding structural member 100; finally, inserting the fixing element 330 through a hole in the cover plate 310 and tightening it into a pre-set or post-placed hole to detachably fix the cover plate 310. During tightening, the sealing element 320 is compressed and deformed, achieving a seal. An additional advantage of this method is that the installation and removal of the cover plate 310 are extremely convenient, greatly facilitating future node maintenance, filling material replacement, or component disassembly.

[0052] Example 6 Based on Example 5, this example specifies the sealing element 320 as a rubber sealing strip that is pasted and fixed to the inner edge of the cover plate 310. When the fixing element 330 is locked, the rubber sealing strip is compressed and deformed between the surfaces of the cover plate 310 and the radiation shielding structural member 100, thereby achieving a reliable seal between the surfaces of the cover plate 310 and the radiation shielding structural member 100. Compared with on-site caulking, the use of pre-fabricated sealing strips results in faster construction speed, more controllable quality, and the compressed rubber layer has durable elastic recovery, maintaining sealing pressure for a long time and overcoming the problem of aging and cracking of traditional sealants.

[0053] Example 7 Based on the construction method described in Example 1, this example refines the steps for preparing the radiation shielding structural component 100. The main body of the radiation shielding structural component 100 is a steel-reinforced concrete component 110, and the exposed steel frame portion 120 is the portion of the internal steel frame of the steel-reinforced concrete component 110 that extends out of the concrete end face. The step of providing at least two radiation shielding structural components 100 includes: when prefabricating the steel-reinforced concrete component 110 in the factory, reserving the exposed steel frame portion 120 through template design, and performing rust removal and sandblasting treatment on the exposed portion; subsequently, fixing the end plate 210 at the end of the exposed steel frame portion 120 by welding, and welding the reinforcing member 220 between the end plate 210 and the exposed steel frame portion 120. By adopting the factory prefabrication method, all work requiring high precision and quality, such as welding, drilling, and anti-slip layer treatment, can be completed in a controlled environment, leaving only hoisting and bolt tightening on site, greatly shortening the on-site construction cycle, reducing the worker's exposure time in a radioactive environment, and ensuring the manufacturing quality of the nodes from the source.

[0054] Example 8 This embodiment provides a method for disassembling a detachable component connection node structure for radiation-proof buildings. This connection node structure is constructed according to the aforementioned construction method. The disassembly method includes the following steps: Loosen and remove the fasteners 330 that fix the cover plate 310 of the sealing device 300 to the radiation shielding structural member 100 or the surface of an adjacent structure, i.e., unscrew the expansion bolts or anchors and remove the cover plate 310.

[0055] Remove the flexible radiation shielding filler material 400 that fills the gap. When the flexible radiation shielding filler material 400 is a solid filler formed after curing of an epoxy resin mixture containing lead particles, the removal step is specifically as follows: use a tool to pry or cut the solid filler out of the gap in whole or in pieces and recycle it for subsequent reuse. This process causes no damage or only minor damage to the component body.

[0056] Remove the fasteners 230 of the connecting device 200 that connects the two radiation shielding structural components 100, that is, loosen and remove all the high-strength bolts, so that the two mating connecting end plates 210 are separated, thereby allowing the two radiation shielding structural components 100 to be lifted off separately, completing the non-destructive dismantling and reassembly of the components.

[0057] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A construction method for a detachable component connection node structure for radiation-proof buildings, characterized in that, include: Prepare at least two radiation shielding structural components (100), each of the radiation shielding structural components (100) having an exposed steel frame portion (120) at its end, and the end of the exposed steel frame portion (120) being fixed with a first docking portion or a second docking portion of a connecting device (200); Align the first and second mating portions of the exposed steel portions (120) of the two radiation shielding structural members (100) with each other and lock them together with fasteners (230) to detachably connect and fix the two radiation shielding structural members (100). A flexible radiation shielding filler material (400) is filled in the gap formed by the end faces of the two radiation shielding structural members (100) and the outer surface of the connecting device (200) to provide continuous radiation shielding. The sealing device (300) is covered on the outside of the flexible radiation shielding filling material (400) and detachably fixed to the surface of the radiation shielding structural member (100) to enclose the flexible radiation shielding filling material (400) in the gap.

2. The construction method for the detachable component connection node structure for radiation-proof buildings according to claim 1, characterized in that, The first and second docking portions of the connecting device (200) both include a connecting end plate (210), which is welded and fixed to the end of the corresponding exposed portion (120) of the steel frame; A reinforcing member (220) is also fixedly connected between the connecting end plate (210) and the side wall of the corresponding exposed steel frame (120) to enhance the rigidity of the connecting end plate (210); An anti-slip layer (240) is also provided on the contact surface of the connecting end plate (210) to increase the coefficient of friction; The fastener (230) is a high-strength bolt. The step of locking the two first mating parts and the second mating part includes inserting high-strength bolts and tightening the two connecting end plates (210).

3. The construction method for the detachable component connection node structure for radiation-proof buildings according to claim 2, characterized in that, The reinforcing member (220) consists of multiple steel plate stiffening ribs, which are distributed circumferentially along the exposed portion (120) of each steel frame. One side of each steel plate stiffening rib is welded and fixed to the plate surface of the connecting end plate (210), and the other side is welded and fixed to the outer side wall of the corresponding exposed portion (120) of the steel frame, in order to enhance the rigidity of the connecting end plate (210) and the integrity of the joint.

4. The construction method for the detachable component connection node structure for radiation-proof buildings according to claim 1, characterized in that, The steps of filling the flexible radiation shielding filler material (400) include: An epoxy resin mixture containing lead particles is injected into the voids, and the mixture is compacted and filled by vibration or pressure. After curing, the mixture forms a solid filler with radiation shielding capability to ensure the continuity of radiation shielding.

5. The construction method for the detachable component connection node structure for radiation-proof buildings according to claim 1, characterized in that, The sealing device (300) includes a cover plate (310), a sealing element (320), and a fixing element (330). The step of covering and securing the sealing device (300) includes: pre-setting the sealing element (320) on the inner edge of the cover plate (310); The cover plate (310) is strung across the joint of the two mating radiation shielding structural members (100), so that the seal (320) is sandwiched between the surface of the cover plate (310) and the radiation shielding structural member (100). The fastener (330) is inserted through the cover plate (310) and fastened to the surface of the radiation shielding structural member (100) or an adjacent structure to detachably fix the cover plate (310) and to press the seal (320) to achieve a seal.

6. The construction method for the detachable component connection node structure for radiation-proof buildings according to claim 5, characterized in that, The sealing element (320) is a rubber sealing strip that is glued and fixed to the inner edge of the cover plate (310). When the fastener (330) is locked, the rubber sealing strip is compressed and deformed between the surface of the cover plate (310) and the surface of the radiation shielding structural member (100) to achieve a seal between the surface of the cover plate (310) and the surface of the radiation shielding structural member (100).

7. The construction method for the detachable component connection node structure for radiation-proof buildings according to claim 1, characterized in that, The radiation shielding structural member (100) includes a steel-reinforced concrete member (110), wherein the exposed steel portion (120) is the portion of the internal steel reinforcement of the steel-reinforced concrete member (110) extending out of the concrete end face. The step of providing at least two radiation shielding structural members (100) includes reserving the exposed steel portion (120) when prefabricating the steel-reinforced concrete member (110) in the factory, and welding and fixing end plates (210) and reinforcing members (220) to the ends of the exposed steel portion (120).

8. A method for disassembling a detachable component connection node structure for radiation-proof buildings, characterized in that, The connection node structure is constructed using the construction method according to any one of claims 1 to 7, and the disassembly method includes: Loosen and remove the fasteners (330) that secure the cover plate (310) of the sealing device (300) to the radiation shielding structural member (100) or the surface of an adjacent structure, and remove the cover plate (310). Remove the flexible radiation shielding filling material (400) that was filling the gap; Remove the fasteners (230) of the connecting device (200) that connects the two radiation shielding structural members (100) to separate the two radiation shielding structural members (100).

9. The method for disassembling a detachable component connection node structure according to claim 8, characterized in that, The flexible radiation shielding filler material (400) is a solid filler formed by curing an epoxy resin mixture containing lead particles. The step of removing the flexible radiation shielding filling material (400) includes: removing and recycling the solid filler from the gap in whole or in pieces for recycling and reuse of the flexible radiation shielding filling material (400).

10. The method for disassembling a detachable component connection node structure according to claim 8, characterized in that, The connecting device (200) includes a connecting end plate (210) welded and fixed to the end of the exposed portion (120) of the steel frame and high-strength bolts connecting the connecting end plate (210). The step of removing the fastener (230) includes: loosening and removing the high-strength bolt to separate the two connecting end plates (210) to allow the two radiation shielding structural members (100) to be lifted off in order to complete the dismantling and reassembly of the members.

Images