Radiation-proof concrete wall structure

Abstract

The utility model relates to the technical field of radiation protection walls, and discloses a radiation protection concrete wall structure which comprises a first side wall, a second side wall, a concrete inner wall and an isolation layer, the first side wall and the second side wall are arranged in parallel at an interval, and a containing space is formed between the first side wall and the second side wall; the concrete inner wall is arranged in the containing space, the isolation layer is arranged outside the concrete inner wall in a wrapping mode, and the isolation layer is arranged between the concrete inner wall and the first side wall and between the concrete inner wall and the second side wall; the isolating layer is used for isolating heat transfer from the concrete inner wall to the first side wall and the second side wall and buffering stress release of the concrete inner wall; the edge of the concrete inner wall is further provided with a joint-through-preventing part, and the joint-through-preventing part is used for being matched with an adjacent structural part in a concave-convex mode. The two side walls serve as structural stress walls, and the concrete inner wall serves as a radiation protection wall, so that a three-layer radiation protection wall structure is formed, the phenomenon that the earthquake effect is increased due to most ineffective rigidity of a thick wall is avoided, and the structural rigidity and the anti-seismic property of the radiation protection wall are ensured.

Description

Technical Field

[0001] This utility model relates to the field of radiation shielding wall technology, and in particular to a radiation shielding concrete wall structure. Background Technology

[0002] Currently, boron neutron, proton, and heavy ion radiation technologies are commonly used in clinical treatment of tumors. In order to prevent excessive radiation dose to the surrounding environment during treatment, thick radiation-proof walls are required to shield and isolate the treatment device. The wall thickness ranges from 800mm to 3400mm.

[0003] Existing radiation-shielding thick walls are large-volume concrete thick walls, which have the following problems: 1. The structural stiffness of the thick walls is large, far exceeding the required stiffness of the structure, resulting in abrupt changes in structural stiffness and excessive seismic load; 2. Even if the thick walls are reinforced according to the minimum reinforcement ratio, the amount of steel reinforcement required for structural stress exceeds the amount required; 3. The heat of hydration inside the thick walls is not easily dissipated, and under the influence of internal and external constraints, temperature cracks are very likely to occur.

[0004] Subsequently, Chinese invention patent application CN118933225A, with publication date of November 12, 2024, disclosed the structure and construction method of a radiation-proof sandwich wall, including a structural column and a first radiation-proof sandwich wall and a second radiation-proof sandwich wall respectively located on both sides of the structural column. The sandwich wall includes an inner leaf wall, an outer leaf wall and a protective interlayer. During construction, the inner leaf wall and the outer leaf wall are built and a space is reserved for pouring the protective interlayer.

[0005] However, after pouring concrete into the sandwich space of the sandwich wall, there is still a temperature difference between the internal hydration heat and the external temperature. The high internal stress of the protective sandwich layer may damage the inner and outer leaf walls, resulting in poor structural stiffness and seismic performance of the entire sandwich wall. Utility Model Content

[0006] The technical problem to be solved by this utility model is that the existing sandwich wall has a temperature difference between the internal heat of hydration and the external temperature, the internal stress of the protective interlayer is large and may damage the inner and outer leaf walls, and the structural rigidity and seismic performance of the entire sandwich wall are poor.

[0007] To solve the above-mentioned technical problems, this utility model provides a technical solution for a radiation-proof concrete wall structure:

[0008] The radiation-proof concrete wall structure includes a first side wall, a second side wall, a concrete inner wall, and an isolation layer. The first side wall and the second side wall are arranged in parallel and spaced apart, and an accommodating space is formed between the first side wall and the second side wall.

[0009] The concrete interior wall is disposed in the accommodating space, the isolation layer is disposed on the outside of the concrete interior wall, and the isolation layer is located between the concrete interior wall and the first side wall, and between the concrete interior wall and the second side wall.

[0010] The isolation layer is used to isolate the heat transfer between the concrete inner wall and the first side wall and the second side wall, and to buffer the stress release of the concrete inner wall; the edge of the concrete inner wall is also provided with an anti-through-joint part, which is used to cooperate with the adjacent structural members.

[0011] Furthermore, the isolation layer is an extruded polystyrene board, and the thickness of the extruded polystyrene board is any size between 10mm and 50mm.

[0012] Furthermore, the anti-through-seam portion includes a first step portion disposed at the bottom edge of the concrete inner wall, and the isolation layer is also disposed on the first step portion, the first step portion being used to engage with the protrusion of the bottom plate.

[0013] Furthermore, the anti-through-crack portion also includes a second step portion disposed at the top edge of the concrete inner wall, and the isolation layer is also disposed on the second step portion, which is used to engage with the boss of the top plate.

[0014] Furthermore, both the first and second side walls are reinforced concrete walls, and the inner concrete wall is a plain concrete backfill wall.

[0015] Furthermore, both the first sidewall and the second sidewall are segmented wall structures, which include a bottom section, a middle section and a top section arranged sequentially along the height direction, and construction joints are provided between the middle section and the bottom section and the top section respectively.

[0016] Furthermore, a water-stop steel plate is connected between the middle section and the bottom section, and between the middle section and the top section, and the water-stop steel plate is arranged crosswise with the construction joint.

[0017] Furthermore, the first sidewall has the same structure as the second sidewall. The first sidewall includes an outer steel mesh and an inner steel mesh. The outer steel mesh and the inner steel mesh are arranged parallel to each other along the wall thickness direction and are both integral steel mesh sheets.

[0018] Furthermore, the height-to-thickness ratio of the first sidewall and the height-to-thickness ratio of the second sidewall are both arbitrary values ​​between 6 and 7.5.

[0019] Furthermore, the thickness of the first sidewall and the thickness of the second sidewall are any dimensions between 0.3m and 1m, and the width of the accommodating space is any dimension between 1m and 3m.

[0020] Compared with existing technologies, the radiation-shielding concrete wall structure of this utility model has the following advantages: This radiation-shielding concrete wall structure adopts a structural form consisting of a first side wall, a second side wall, a concrete inner wall, and an isolation layer. The first and second side walls are arranged in parallel and spaced apart, forming an accommodating space between them. The concrete inner wall is set within this accommodating space. Within the radiation-shielding thick wall area, the first and second side walls are constructed first, with an accommodating space reserved in between. The two side walls can serve as permanent formwork for the inner wall, allowing concrete to be backfilled and poured into the accommodating space to form the concrete inner wall. After forming, the two side walls serve as structural load-bearing walls, while the concrete inner wall serves as the radiation-shielding wall, thus constituting a three-layer radiation-shielding wall structure.

[0021] The isolation layer is placed on the outside of the concrete inner wall and is located between the concrete inner wall and the first side wall, as well as between the concrete inner wall and the second side wall. The isolation layer isolates heat transfer between the concrete inner wall and the first and second side walls, and plays a role in heat preservation for the backfilled concrete, so as to reduce the temperature difference between the inside and outside caused by the heat of hydration. At the same time, the isolation layer also has a buffer capacity to absorb the stress release of the concrete inner wall, preventing the concrete inner wall from causing stress damage to the two side walls.

[0022] In addition, the edges of the concrete interior wall are equipped with anti-through-joint sections, which are used to fit with adjacent structural components, improving the structural compatibility between the concrete interior wall and adjacent structural components and enhancing the structural reliability of the concrete interior wall. The first and second side walls of this radiation shielding wall structure can meet the bending and shear stiffness requirements of a shear wall while effectively reducing the thickness of the high-strength wall, avoiding the negative increase in seismic forces due to the largely ineffective stiffness of the thick wall, thus ensuring the structural stiffness and seismic performance of the entire radiation shielding concrete wall. Attached Figure Description

[0023] Figure 1 This is a cross-sectional schematic diagram of the radiation-proof concrete wall structure in an embodiment of this utility model;

[0024] Figure 2 This is a cross-sectional schematic diagram of the radiation-proof concrete wall structure in the first construction step of this utility model embodiment;

[0025] Figure 3 This is a cross-sectional schematic diagram of the radiation-proof concrete wall structure in the second construction step of this utility model embodiment;

[0026] Figure 4This is a cross-sectional schematic diagram of the radiation-proof concrete wall structure in step three of the construction process in this embodiment of the present invention;

[0027] Figure 5 This is a cross-sectional schematic diagram of the radiation-proof concrete wall structure in step four of the construction process in this embodiment of the present invention;

[0028] In the diagram: 1-First side wall, 10-Construction joint, 11-Bottom section of the first side wall, 12-Middle section of the first side wall, 13-Top section of the first side wall, 14-Waterstop steel plate, 15-Outer steel mesh, 16-Inner steel mesh, 2-Second side wall, 20-Accommodation space, 21-Bottom section of the second side wall, 22-Middle section of the second side wall, 23-Top section of the second side wall, 3-Concrete inner wall, 31-First step, 32-Second step, 4-Isolation layer, 5-Bottom slab, 50-Bottom slab boss, 6-Top slab, 60-Top slab boss. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0033] like Figure 1 As shown, an embodiment of the present invention provides a radiation-proof concrete wall structure, comprising a first side wall 1, a second side wall 2, a concrete inner wall 3, and an isolation layer 4. The first side wall 1 and the second side wall 2 are arranged in parallel and spaced apart, forming an accommodating space 20 between the first side wall 1 and the second side wall 2. The concrete inner wall 3 is disposed in the accommodating space 20, and the isolation layer 4 is disposed on the outside of the concrete inner wall 3, and is located between the concrete inner wall 3 and the first side wall 1, and between the concrete inner wall 3 and the second side wall 2. The isolation layer 4 is used to isolate heat transfer from the concrete inner wall 3 to the first side wall 1 and the second side wall 2, and to buffer the stress release of the concrete inner wall 3. The edge of the concrete inner wall 3 is also provided with an anti-through-joint part, which is used to engage with adjacent structural members.

[0034] The radiation-shielding concrete wall structure adopts a structural form consisting of a first side wall 1, a second side wall 2, a concrete inner wall 3, and an isolation layer 4. The first side wall 1 and the second side wall 2 are arranged in parallel and spaced apart, forming an accommodating space 20 between them. The concrete inner wall 3 is set in the accommodating space 20. Within the radiation-shielding thick wall area, the first side wall 1 and the second side wall 2 are constructed first, leaving the accommodating space 20 in the middle. The two side walls can serve as permanent formwork for backfilling and pouring concrete into the accommodating space 20 to form the concrete inner wall 3. After completion, the two side walls serve as structural load-bearing walls, and the concrete inner wall 3 serves as the radiation-shielding wall, thus forming a three-layer radiation-shielding wall structure.

[0035] The isolation layer 4 is installed on the outside of the concrete inner wall 3, and is located between the concrete inner wall 3 and the first side wall 1, and between the concrete inner wall 3 and the second side wall 2. The isolation layer 4 isolates heat transfer between the concrete inner wall 3 and the first side wall 1 and the second side wall 2, and plays a role in heat preservation for the backfilled concrete, so as to reduce the temperature difference between the inside and outside caused by the heat of hydration. At the same time, the isolation layer 4 also has a buffer that can absorb the stress release of the concrete inner wall 3, preventing the concrete inner wall 3 from causing stress damage to the two side walls.

[0036] In addition, the edges of the concrete inner wall 3 are provided with anti-through-joint sections, which are used to fit with adjacent structural members. This improves the structural compatibility between the concrete inner wall 3 and adjacent structural members, thus enhancing the structural reliability of the concrete inner wall 3. The first side wall 1 and the second side wall 2 of this radiation shielding wall structure can meet the bending and shear stiffness requirements of a shear wall while effectively reducing the thickness of the high-strength wall. This avoids the ineffective stiffness of the thick wall increasing seismic forces, thereby ensuring the structural stiffness and seismic performance of the entire radiation shielding concrete wall.

[0037] In this embodiment, the insulating layer 4 is an extruded polystyrene (XPS) board, and the thickness of the XPS board can be any size between 10mm and 50mm. Specifically, the thickness of the XPS board is 20mm. XPS board has the characteristics of being lightweight and high-strength, having high thermal resistance, and low water absorption, and can play a good role in thermal insulation. To meet different usage requirements, in other embodiments, the thickness of the XPS board can be selected as 30mm, 40mm, or any other size between 10mm and 50mm.

[0038] As a further preferred embodiment, the anti-through-joint section includes a first step 31 located at the bottom edge of the concrete inner wall 3, with an isolation layer 4 also covering the first step 31. The first step 31 is used for a concave-convex fit with the bottom plate boss 50. Correspondingly, the anti-through-joint section also includes a second step 32 located at the top edge of the concrete inner wall 3, with the isolation layer 4 also covering the second step 32. The second step 32 is used for a concave-convex fit with the top plate boss 60. The height H0 of both the first step 31 and the second step 32 is 0.1m.

[0039] Furthermore, both the first side wall 1 and the second side wall 2 are reinforced concrete walls. Reinforced concrete walls have high bending and shear stiffness, which can meet the structural requirements for shear walls. The inner concrete wall 3 is a plain concrete backfill wall. The plain concrete backfill wall is thicker and mainly serves to effectively isolate radiation. Instead of being used as a shear wall structure, it reduces the thickness of the high-strength wall, avoiding the increase in seismic force due to the large amount of ineffective stiffness of the thick wall.

[0040] It should be noted that both the first side wall 1 and the second side wall 2 are segmented wall structures. The first side wall 1 includes a bottom section 11, a middle section 12, and a top section 13 arranged sequentially along the height direction. Construction joints 10 are provided between the middle section 12 and the bottom section 11 and the top section 13, respectively. Correspondingly, the second side wall 2 includes a bottom section 21, a middle section 22, and a top section 23 arranged sequentially along the height direction. Construction joints 10 are provided between the middle section 22 and the bottom section 21 and the top section 23, respectively. The segmented wall structure ensures the structural strength of the two side walls and reduces the difficulty of construction.

[0041] Furthermore, the bottom section 11 of the first side wall and the bottom section 21 of the second side wall are integrally cast with the base plate 5, and the top section 13 of the first side wall and the top section 23 of the second side wall are integrally cast with the top plate 6. The height H1 of the bottom section 11 of the first side wall and the bottom section 21 of the second side wall is 0.5m.

[0042] Water-stop steel plates 14 are also connected between the middle section 12 and the bottom section 11 of the first side wall, between the middle section 12 and the top section 13 of the first side wall, between the middle section 22 and the bottom section 21 of the second side wall, and between the middle section 22 and the top section 23 of the second side wall. The water-stop steel plates 14 are arranged intersectingly with the construction joint 10, which effectively improves the waterproof performance of the entire side wall.

[0043] In this embodiment, the first side wall 1 and the second side wall 2 have the same structure. The first side wall 1 includes an outer steel mesh 15 and an inner steel mesh 16. The outer steel mesh 15 and the inner steel mesh 16 are arranged parallel to each other along the wall thickness direction and are both integral steel mesh sheets. The first side wall 1 and the second side wall 2 both adopt the design of inner and outer double-layer steel mesh, which can ensure the bending and shear stiffness of the two side walls.

[0044] In addition, the reinforcement of the first side wall 1 and the second side wall 2 must meet the structural requirements. The lateral pressure of the inner concrete can be calculated by the following formula: q = γH, where q is the lateral pressure (kN / m). 2 γ is the unit weight of concrete, which can be taken as 24 kN / m³. 3 H represents the concrete pouring height. The height-to-thickness ratio of the first side wall 1 and the second side wall 2 can be any value between 6 and 7.5. For example: when the side wall height is 3m, the designed thickness is 0.4m, i.e., the height-to-thickness ratio is 7.5; when the side wall height is 4m, the designed thickness is 0.6m, i.e., the height-to-thickness ratio is 6.67; when the side wall height is 5m, the designed thickness is 0.8m, i.e., the height-to-thickness ratio is 6.25.

[0045] As a further preferred embodiment, the thickness of the first sidewall 1 and the thickness of the second sidewall 2 are any dimensions between 0.3m and 1m, and the width of the accommodating space 20 is any dimension between 1m and 3m. In this embodiment, the thickness of the first sidewall 1 is D1, the thickness of the second sidewall 2 is D2, D1 = D2 = 0.4m, the total thickness of the radiation-shielding concrete wall structure is D = 2m, and the width of the accommodating space 20 is D3, D3 = 1.2m.

[0046] The specific construction process is as follows: Step 1, as... Figure 2 As shown, first construct the base slab 5 of the wall, and reserve a 0.1m high base slab protrusion 50 on the base slab 5. Then, pour the bottom section 11 of the first side wall and the bottom section 21 of the second side wall, both 0.5m high. Step 2, as... Figure 3 As shown, steel mesh is tied to the two side walls to support the inner and outer formwork of the side walls. Concrete is poured into the formwork up to 0.3m below the top slab 6. After curing, the formwork is removed to form the middle section 12 of the first side wall and the middle section 22 of the second side wall.

[0047] Step 3, as follows Figure 4 As shown, the inner sides of the first side wall 1, the inner sides of the second side wall 2, and the bottom protrusion 50 are fully covered with extruded polystyrene board to ensure that the isolation layer 4 can completely surround the concrete inner wall 3. Step 4, as... Figure 5 As shown, C25 plain concrete is backfilled into the accommodating space 20, and a second step 32 with a height of 0.1m is reserved at the top. Step 5, as... Figure 1 As shown, the second step 32 is fully covered with extruded polystyrene board, and concrete is poured to the top to form the top plate 6 and the top plate protrusion 60.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A radiation shielding concrete wall structure, characterized by, The first side wall and the second side wall are arranged in parallel and spaced apart, and a containing space is formed between the first side wall and the second side wall; The concrete inner wall is arranged in the containing space, the isolation layer is wrapped outside the concrete inner wall, and the isolation layer is arranged between the concrete inner wall and the first side wall and between the concrete inner wall and the second side wall; The isolation layer is used for heat insulation of the concrete inner wall to the first side wall and the second side wall, and stress release buffering of the concrete inner wall; and the edge of the concrete inner wall is further provided with a through-seam prevention part used for concave-convex matching with an adjacent structural member.

2. The radiation shielding concrete wall structure according to claim 1, wherein The isolation layer is an extruded sheet with a thickness of any size between 10 mm and 50 mm.

3. The radiation shielding concrete wall structure of claim 1, wherein The through-seam prevention part includes a first step part arranged at the bottom edge of the concrete inner wall, and the isolation layer is further wrapped on the first step part, and the first step part is used for concave-convex matching with a floor boss.

4. The radiation shielding concrete wall structure of claim 3, wherein The through-seam prevention part further includes a second step part arranged at the top edge of the concrete inner wall, and the isolation layer is further wrapped on the second step part, and the second step part is used for concave-convex matching with a roof boss.

5. The radiation shielding concrete wall structure of claim 1, wherein The first side wall and the second side wall are both reinforced concrete walls, and the concrete inner wall is a plain concrete backfill wall.

6. The radiation shielding concrete wall structure of claim 1, wherein The first side wall and the second side wall are both sectional wall structures, which include a bottom section, a middle section and a top section arranged in sequence in the height direction, and construction joints are arranged between the middle section and the bottom section and between the middle section and the top section.

7. The radiation shielding concrete wall structure of claim 6, wherein Water stop steel plates are further connected between the middle section and the bottom section and between the middle section and the top section, and the water stop steel plates are arranged in cross with the construction joints.

8. The radiation shielding concrete wall structure of claim 7, wherein The first side wall and the second side wall have the same structure, the first side wall includes an outer layer of reinforcement mesh and an inner layer of reinforcement mesh, the outer layer of reinforcement mesh and the inner layer of reinforcement mesh are arranged in parallel and spaced apart in the wall thickness direction, and the outer layer of reinforcement mesh and the inner layer of reinforcement mesh are both one-piece reinforcement mesh sheets.

9. The radiation shielding concrete wall structure of claim 1, wherein The height-to-thickness ratio of the first side wall and the height-to-thickness ratio of the second side wall are both any size between 6 and 7.

5.

10. The radiation shielding concrete wall structure of claim 1, wherein The thickness of the first side wall and the thickness of the second side wall are both any size between 0.3 m and 1 m, and the width of the containing space is any size between 1 m and 3 m.

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