Arrangement and connection node of steel plate concrete shielding plant and reinforced concrete wall

Abstract

The invention relates to a steel plate concrete shielding workshop and reinforced concrete wall arrangement and connection node, and relates to the technical field of concrete shielding workshops, the steel plate concrete shielding workshop and reinforced concrete wall arrangement and connection node comprises a steel plate concrete assembly, a reinforced concrete wall assembly and a composite connection assembly, the steel plate concrete assembly is fixedly arranged on the outer side surface of the reinforced concrete wall assembly; the steel plate concrete assembly comprises an outer-layer steel plate and inner-layer radiation shielding concrete. The radiation shielding performance is excellent, 15%-20% of barite aggregate and borax are doped into the inner-layer radiation shielding concrete, the barite aggregate can effectively block penetration of gamma rays and the like, the borax can specifically absorb neutron radiation, a dual-radiation protection barrier is formed, and the core requirement of a shielding plant for radiation isolation is met. In the composite connecting assembly, the radiation shielding plug filled in the shear-resistant sleeve is tightly attached to the steel plate concrete assembly and the reinforced concrete wall assembly, and a radiation leakage gap at a connecting node can be filled.

Description

Technical Field

[0001] This application relates to the field of concrete shielded workshop technology, and in particular to the arrangement and connection nodes of steel plate concrete shielded workshops and reinforced concrete walls. Background Technology

[0002] In locations requiring high radiation shielding, such as nuclear power plants, the structural design of shielding buildings is crucial. Currently, common shielding building structures mainly include pure steel structures, pure concrete structures, and steel-concrete composite structures. While pure steel structures offer high strength, their radiation shielding performance is relatively poor; pure concrete structures offer good radiation shielding performance but have weak seismic resistance; steel-concrete composite structures combine the advantages of both, but present significant challenges in the design and construction of connection nodes.

[0003] Traditional shielded workshops often use a single reinforced concrete wall design or simply add a small amount of barite aggregate to the concrete, lacking a targeted gamma-ray protection mechanism. On the other hand, the connection nodes between the wall and the external protective structure (such as steel plate layer) are poorly designed, often using direct bonding or simple bolt fixing. The nodes are prone to radiation leakage channels due to concrete shrinkage and installation gaps. The lack of a dedicated shielding filling structure makes them weak points for radiation penetration.

[0004] Therefore, we designed the layout and connection nodes of the steel plate concrete shielded plant and the reinforced concrete walls. Summary of the Invention

[0005] The purpose of this application is to provide the layout and connection details of steel plate concrete shielded workshops and reinforced concrete walls.

[0006] Firstly, the technical solution for the arrangement and connection nodes of the steel plate concrete shielded workshop and the reinforced concrete wall provided in this application is as follows: The steel-concrete shielded workshop and the reinforced concrete wall layout and connection nodes include steel-concrete components, reinforced concrete wall components, and composite connection components. The steel-concrete components are fixedly installed on the outer surface of the reinforced concrete wall components. Each steel-concrete component includes an outer steel plate and an inner radiation-shielding concrete layer. Several steel frames are provided between the outer steel plate and the inner radiation-shielding concrete layer. The steel frames are welded and fixed to the outer steel plate, and the steel frames are evenly distributed in the area between the outer steel plate and the inner radiation-shielding concrete layer. Preferably, the main body of the reinforced concrete wall component is C60 impermeable concrete, and the interior of the reinforced concrete wall component is provided with a double-layer bidirectional steel mesh, and a number of annular stirrups are fixedly provided on the side of the double-layer bidirectional steel mesh near the steel plate concrete component.

[0007] Preferably, the strength grade of the inner radiation shielding concrete is C40-C50, and 15%-20% barite aggregate and 5%-8% borax are added inside the inner radiation shielding concrete. The steel frame is made of H-shaped steel or box-shaped steel.

[0008] Preferably, the composite connection component penetrates the steel plate concrete component and the reinforced concrete wall component, and the composite connection component includes a shear sleeve, a radiation shielding plug, a prestressed anchor rod, and an elastic buffer layer.

[0009] Preferably, the shear sleeve is a seamless steel pipe with external threads at both ends, and the surface of the shear sleeve is provided with a spiral shear groove, which is used to enhance the interlocking effect between the shear sleeve and the concrete.

[0010] Preferably, the outer steel plate and the reinforced concrete wall component are provided with a plurality of sleeve mounting holes. The size of the sleeve mounting holes is matched with the shear sleeve. The shear sleeve is inserted into the sleeve mounting holes, and the plurality of shear sleeves are evenly and alternately distributed in a triangular array between the reinforced concrete wall component and the steel plate concrete component.

[0011] Preferably, the lateral spacing between two adjacent shear sleeves is 300-400mm, and the longitudinal spacing between the two shear sleeves is 250-350mm. The central axis of the shear sleeve is inclined at a 15°-20° angle to the connection interface to simultaneously bear shear force and tensile force and avoid stress concentration. The radiation shielding plug is filled and installed inside the shear sleeve, and the two ends of the radiation shielding plug are tightly fitted to the steel plate concrete component and the reinforced concrete wall component, respectively.

[0012] Preferably, the prestressed anchor rod is made of high-strength precision-rolled threaded steel with a galvanized surface. Both ends of the prestressed anchor rod are provided with external threads, and both ends of the prestressed anchor rod are threadedly connected with anti-loosening nuts and reinforcing washers. Both ends of the radiation shielding plug are provided with central reserved holes, the size of which matches the prestressed anchor rod. One end of the prestressed anchor rod is fixed to the steel frame inside the steel plate concrete component, and the other end is anchored to the double-layer bidirectional steel mesh inside the reinforced concrete wall component.

[0013] Preferably, a sealing block is inserted into both ends of the sleeve mounting hole, one end of the sealing block overlaps with the end of the prestressed anchor rod, and the sealing block is tightly fitted to the inner wall of the sleeve mounting hole by sealant.

[0014] Preferably, the elastic buffer layer is disposed between the outer steel plate of the steel plate concrete assembly and the contact surface of the reinforced concrete wall assembly. The width of the elastic buffer layer is 100-150mm larger than the edge of the connection node. The elastic buffer layer is made of butyl rubber-polyethylene composite roll material, and the elastic buffer layer is bonded and fixed to the structures on both sides by a special adhesive.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. Excellent radiation shielding performance: The inner layer of radiation shielding concrete incorporates 15%-20% barite aggregate and borax. The barite aggregate effectively blocks the penetration of gamma rays, while the borax specifically absorbs neutron radiation, forming a dual radiation protection barrier that meets the core radiation isolation requirements of shielded workshops. In the composite connection assembly, the radiation shielding plug filled inside the shear sleeve fits tightly with the steel plate concrete assembly and the reinforced concrete wall assembly, filling the radiation leakage gaps at the connection nodes. Simultaneously, the outer steel plate not only serves as structural support but also assists in blocking radiation, further enhancing the overall shielding integrity and preventing radiation penetration from weak areas at the nodes.

[0016] 2. The structure exhibits stable mechanical properties. The uniformly arranged steel frame is welded and fixed to the outer steel plate, which enhances the overall rigidity of the steel plate concrete assembly, prevents deformation of the outer steel plate due to uneven stress, and evenly transfers the load to the inner radiation shielding concrete, reducing local stress concentration. The shear sleeves are evenly distributed in a triangular array, which can achieve multi-directional load distribution and has stronger stability compared to the traditional uniform arrangement structure. Furthermore, the central axis of the shear sleeve is at a certain angle to the connection interface, which can simultaneously withstand shear and tensile forces, avoiding node damage caused by single force. Combined with the spiral shear groove on the surface, it enhances the interlocking with the concrete and further improves the shear resistance.

[0017] 3. The prestressed anchor rods are made of high-strength precision-rolled threaded steel, and are anchored at both ends to the steel frame and the double-layer bidirectional steel mesh, respectively. The prestress is locked by anti-loosening nuts and reinforcing washers, which can effectively restrain the relative displacement of the steel plate concrete component and the reinforced concrete wall component, and reduce the structural deformation caused by temperature changes and load fluctuations. The elastic buffer layer is set on the contact surface between the two, which can absorb the structural vibration energy and adapt to small deformations, avoiding stress damage caused by rigid contact. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a top view of an embodiment of the present application; Figure 3 This is a rear view structural diagram of an embodiment of this application; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 This is a partial cross-sectional structural diagram of an embodiment of this application; Figure 6 This is a side view structural diagram of an embodiment of this application; Figure 7 yes Figure 6 A magnified structural diagram at point B in the middle.

[0019] Explanation of reference numerals in the attached drawings: 1. Steel plate concrete assembly; 2. Reinforced concrete wall assembly; 3. Composite connection assembly; 101. Outer steel plate; 102. Inner radiation shielding concrete; 103. Steel frame; 201. Double-layer bidirectional steel mesh; 301. Shear sleeve; 302. Radiation shielding plug; 303. Prestressed anchor bolt; 304. Elastic buffer layer; 305. Spiral shear groove; 306. Sleeve mounting hole; 307. Anti-loosening nut; 308. Reinforcing washer; 309. Center reserved hole; 310. Sealing block. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail below.

[0021] Example: The arrangement and connection nodes of the steel plate concrete shielded workshop and the reinforced concrete wall include a steel plate concrete component 1, a reinforced concrete wall component 2, and a composite connection component 3. The steel plate concrete component 1 is fixedly installed on the outer surface of the reinforced concrete wall component 2. The steel plate concrete component 1 includes an outer steel plate 101 and an inner radiation shielding concrete 102. Several steel frames 103 are provided between the outer steel plate 101 and the inner radiation shielding concrete 102. The steel frames 103 are welded and fixed to the outer steel plate 101, and the several steel frames 103 are evenly distributed in the area between the outer steel plate 101 and the inner radiation shielding concrete 102.

[0022] The main body of the reinforced concrete wall component 2 is C60 impermeable concrete, and the interior of the reinforced concrete wall component 2 is provided with a double-layer bidirectional steel mesh 201. Several annular stirrups are fixedly installed on the side of the double-layer bidirectional steel mesh 201 near the steel plate concrete component 1.

[0023] Construction of Reinforced Concrete Wall Component 2: Following the marked positioning lines, the double-layer bidirectional steel mesh 201 is first tied. The longitudinal and transverse steel bars are arranged crosswise and secured point-by-point with binding wire to ensure the mesh structure is stable and secure. On the side of the double-layer bidirectional steel mesh 201 closest to the steel plate concrete component 1, ring stirrups are welded at the designed locations. The weld points between the ring stirrups and the steel mesh must be firm to ensure they form an integral load-bearing structure. The synergistic effect of the double-layer bidirectional steel mesh 201 and the ring stirrups significantly improves the compressive and crack resistance of the reinforced concrete wall component 2, providing a stable foundation for the overall load-bearing capacity of the joint.

[0024] Erect concrete pouring formwork, ensuring the formwork maintains the designed spacing with the double-layer, two-way reinforcing mesh 201 to guarantee the thickness of the reinforced concrete wall component 2 meets requirements after pouring. Pour the thoroughly mixed C60 impermeable concrete into the formwork using a conveying device, and compact it in layers using a vibrating device until the concrete is dense and free of defects such as air bubbles, honeycombing, and pitting. C60 impermeable concrete possesses excellent impermeability, effectively preventing external moisture from seeping into the wall, avoiding steel corrosion or structural damage due to water seepage, and ensuring the durability of the reinforced concrete wall component 2. After pouring, cure according to specifications, and remove the formwork once the concrete strength reaches the design requirements.

[0025] On the surface of the cured reinforced concrete wall component 2, according to the previously marked positions, drilling equipment is used to drill sleeve installation holes 306. The size of the sleeve installation hole 306 matches that of the shear sleeve 301, ensuring that the shear sleeve 301 can be smoothly inserted and installed. During the drilling process, the drilling depth and verticality must be controlled to avoid affecting the subsequent installation accuracy of the shear sleeve 301 due to hole position deviation, thus laying the foundation for the effective connection of the composite connection component 3.

[0026] Construction of Steel Plate Concrete Component 1: Place the outer steel plate 101 flat on a level construction platform. Position the steel frame 103 according to the marked locations, ensuring that several steel frames 103 are evenly distributed in the area between the outer steel plate 101 and the inner radiation shielding concrete 102. Use welding equipment to weld and fix the steel frame 103 to the outer steel plate 101. The weld joints must be full, free of slag inclusions, porosity, and other defects to ensure a firm connection. The rigid frame formed by the steel frame 103 and the outer steel plate 101 enhances the overall rigidity of the steel plate concrete component 1, preventing deformation of the outer steel plate 101 due to uneven stress. It also provides support during the subsequent pouring of the inner radiation shielding concrete 102 and evenly distributes the load to the inner concrete, reducing localized stress concentration.

[0027] Inside the frame structure formed by the outer steel plate 101 and the steel frame 103, a casting formwork is erected. The formwork must be tightly sealed to prevent grout leakage during concrete pouring. The prepared inner radiation shielding concrete 102 (strength grade C40-C50, with 15%-20% barite aggregate and 5%-8% borax) is poured into the formwork and compacted using a vibratory compactor. The barite aggregate effectively blocks the penetration of gamma rays, while borax specifically absorbs neutron radiation. The synergistic effect of these two materials creates a double radiation protection barrier for the inner radiation shielding concrete 102, meeting the core radiation isolation requirements of the shielded plant. After pouring, curing is carried out according to specifications. The formwork is removed after the concrete reaches the required strength.

[0028] After the inner radiation shielding concrete 102 has cured, according to the positions marked on the construction drawings, using the same drilling equipment as the reinforced concrete wall component 2, sleeve installation holes 306 are drilled on the outer steel plate 101 and the inner radiation shielding concrete 102. The positions of the sleeve installation holes 306 must correspond one-to-one with the sleeve installation holes 306 on the reinforced concrete wall component 2, and their sizes must match the shear sleeves 301 to ensure that the shear sleeves 301 can penetrate through the steel plate concrete component 1 and the reinforced concrete wall component 2, achieving an effective connection between the two.

[0029] Installation of Composite Connection Component 3: Clean the contact surfaces between the outer steel plate 101 of the steel plate concrete component 1 and the reinforced concrete wall component 2, removing surface dust and impurities to ensure the contact surfaces are clean and dry. Lay the elastic buffer layer 304 between the contact surfaces, with the width of the elastic buffer layer 304 being 100-150mm wider than the edge of the connection node. Use a special adhesive to bond and fix the elastic buffer layer 304 to the structures on both sides, ensuring a firm bond without bubbles or wrinkles. The elastic buffer layer 304 is made of butyl rubber-polyethylene composite roll material, which has excellent elasticity and sealing properties. It can absorb structural vibration energy, adapt to minor structural deformations, and avoid stress damage caused by rigid contact. It can also prevent moisture and corrosive media from seeping into the contact surface, ensuring the durability of the node.

[0030] Shear sleeves 301 (made of seamless steel pipes with external threads at both ends and spiral shear grooves 305 on the surface) are inserted into the sleeve mounting holes 306. Several shear sleeves 301 are evenly and alternately distributed in a triangular array between the reinforced concrete wall component 2 and the steel plate concrete component 1. The lateral and longitudinal spacing between two adjacent shear sleeves 301 meets the design requirements, and the central axis of the shear sleeve 301 forms a 15°-20° angle with the connection interface. The spiral shear grooves 305 enhance the interlocking effect between the shear sleeves 301 and the concrete, improving the shear resistance of the joint.

[0031] The radiation shielding plug 302 is installed inside the shear sleeve 301, ensuring that both ends of the radiation shielding plug 302 are tightly fitted with the steel plate concrete component 1 and the reinforced concrete wall component 2, respectively, without gaps. It should be noted that the radiation shielding plug 302 is made of a composite material of barite, borax, and epoxy resin, and its radiation shielding performance matches that of the surrounding concrete. The radiation shielding plug 302 fills the space inside the shear sleeve 301, preventing radiation from penetrating through this weak point. Working synergistically with the inner radiation shielding concrete 102 and the outer steel plate 101, it further enhances the overall radiation shielding integrity, meeting the radiation protection requirements of the shielded building.

[0032] The prestressed anchor rod 303 is made of high-strength precision-rolled threaded steel with a galvanized surface and external threads at both ends. First, central pre-drilled holes 309 are made at both ends of the radiation shielding plug 302, the size of which matches the prestressed anchor rod 303. Then, one end of the prestressed anchor rod 303 is passed through the central pre-drilled hole 309 and anchored to the steel frame 103 inside the steel plate concrete assembly 1; the other end is also passed through the central pre-drilled hole 309 and anchored to the double-layer bidirectional steel mesh 201 inside the reinforced concrete wall assembly 2. Anti-loosening nuts 307 and reinforcing washers 308 are threaded onto both ends of the prestressed anchor rod 303, respectively. Tightening the anti-loosening nuts 307 applies a preset prestress to the prestressed anchor rod 303.

[0033] Application of sealing block 310 and sealant: The sealing block 310 is inserted into both ends of the sleeve mounting hole 306. One end of the sealing block 310 overlaps with the end of the prestressed anchor rod 303, and the other end is flush with the end of the sleeve mounting hole 306. Then, sealant is applied to the gap between the sealing block 310 and the inner wall of the sleeve mounting hole 306, ensuring the sealant completely fills the gap to form a tight seal.

[0034] In summary, the C60 impermeable concrete used in reinforced concrete wall component 2 has excellent impermeability. The anti-corrosion treatment of the outer steel plate 101 and the galvanizing treatment of the prestressed anchor rod 303 further enhance the corrosion resistance of the metal components of the joint. The synergistic effect of multiple sealing and protection measures ensures the durability of the joint and extends its service life.

Claims

1. A steel-concrete shielded workshop and reinforced concrete wall arrangement and connection node, comprising a steel-concrete component (1), a reinforced concrete wall component (2), and a composite connection component (3), characterized in that, The steel plate concrete assembly (1) is fixedly installed on the outer surface of the reinforced concrete wall assembly (2). The steel plate concrete assembly (1) includes an outer steel plate (101) and an inner radiation shielding concrete (102). A number of steel frames (103) are provided between the outer steel plate (101) and the inner radiation shielding concrete (102). The steel frames (103) are welded and fixed to the outer steel plate (101), and the number of steel frames (103) are evenly arranged in the area between the outer steel plate (101) and the inner radiation shielding concrete (102).

2. The arrangement and connection nodes of the steel plate concrete shielded workshop and reinforced concrete walls according to claim 1, characterized in that, The main body of the reinforced concrete wall component (2) is C60 impermeable concrete, and the interior of the reinforced concrete wall component (2) is provided with a double-layer bidirectional steel mesh (201). Several annular stirrups are fixedly provided on the side of the double-layer bidirectional steel mesh (201) close to the steel plate concrete component (1).

3. The arrangement and connection nodes of the steel plate concrete shielded workshop and reinforced concrete walls according to claim 2, characterized in that, The inner radiation shielding concrete (102) has a strength grade of C40-C50, and 15%-20% barite aggregate and 5%-8% borax are added inside the inner radiation shielding concrete (102). The steel frame (103) is made of H-shaped steel or box-shaped steel.

4. The arrangement and connection nodes of the steel plate concrete shielded workshop and reinforced concrete walls according to claim 1, characterized in that, The composite connection component (3) penetrates the steel plate concrete component (1) and the reinforced concrete wall component (2), and the composite connection component (3) includes a shear sleeve (301), a radiation shielding plug (302), a prestressed anchor (303) and an elastic buffer layer (304).

5. The arrangement and connection node of the steel plate concrete shielded workshop and reinforced concrete wall as described in claim 4, characterized in that, The shear sleeve (301) is made of seamless steel pipe with external threads at both ends, and the surface of the shear sleeve (301) is provided with a spiral shear groove (305), which is used to enhance the interlocking effect between the shear sleeve (301) and the concrete.

6. The arrangement and connection node of the steel plate concrete shielded workshop and reinforced concrete wall as described in claim 5, characterized in that, The outer steel plate (101) and the reinforced concrete wall component (2) are provided with a number of sleeve mounting holes (306). The size of the sleeve mounting holes (306) matches the shear sleeve (301). The shear sleeve (301) is inserted into the sleeve mounting hole (306). The shear sleeve (301) is evenly distributed in a triangular array between the reinforced concrete wall component (2) and the steel plate concrete component (1).

7. The arrangement and connection node of the steel plate concrete shielded workshop and reinforced concrete wall as described in claim 6, characterized in that, The lateral spacing between two adjacent shear sleeves (301) is 300-400mm, and the longitudinal spacing between the two shear sleeves (301) is 250-350mm. The central axis of the shear sleeve (301) is inclined at 15°-20° to the connection interface, which is used to simultaneously bear shear force and tensile force and avoid stress concentration. The radiation shielding plug (302) is filled and installed inside the shear sleeve (301), and the two ends of the radiation shielding plug (302) are tightly fitted to the steel plate concrete component (1) and the reinforced concrete wall component (2), respectively.

8. The arrangement and connection node of the steel plate concrete shielded workshop and reinforced concrete wall as described in claim 7, characterized in that, The prestressed anchor rod (303) is made of high-strength precision rolled threaded steel and its surface is galvanized. Both ends of the prestressed anchor rod (303) are provided with external threads, and both ends of the prestressed anchor rod (303) are threadedly connected with anti-loosening nuts (307) and reinforcing washers (308). Both ends of the radiation shielding plug (302) are provided with central reserved holes (309). The size of the central reserved holes (309) matches that of the prestressed anchor rod (303). One end of the prestressed anchor rod (303) is fixed to the steel frame (103) inside the steel plate concrete component (1), and the other end is anchored to the double-layer bidirectional steel mesh (201) inside the reinforced concrete wall component (2).

9. The arrangement and connection node of the steel plate concrete shielded workshop and reinforced concrete wall as described in claim 8, characterized in that, A sealing block (310) is inserted into both ends of the sleeve mounting hole (306). One end of the sealing block (310) overlaps with the end of the prestressed anchor rod (303), and the sealing block (310) is tightly fitted to the inner wall of the sleeve mounting hole (306) with sealant.

10. The arrangement and connection node of the steel plate concrete shielded workshop and reinforced concrete wall as described in claim 9, characterized in that, The elastic buffer layer (304) is disposed between the outer steel plate (101) of the steel plate concrete component (1) and the contact surface of the reinforced concrete wall component (2). The width of the elastic buffer layer (304) is 100-150mm larger than the edge of the connection node. The elastic buffer layer (304) is made of butyl rubber-polyethylene composite roll material, and the elastic buffer layer (304) is bonded and fixed to the structures on both sides by special adhesive.

Images