Concrete shielding body structure of large radiation device

Abstract

The utility model relates to the technical field of large-scale radiation device shielding body building construction, and discloses a concrete shielding body structure of a large-scale radiation device, which comprises a top plate, a bottom plate, a shear wall and an internal space enclosed by the top plate, the bottom plate and the shear wall and used for placing the radiation device, building anti-seismic joints are reserved on the periphery of the building structural column, and the building structural column is sleeved with a first bracket protection compensation structure. Furthermore, the building bearing beam is arranged in the top plate and connected with the building structural columns, anti-seismic joints are reserved on the periphery of the building bearing beam, and the building bearing beam is sleeved with a second bracket protection compensation structure. According to the scheme, the problem that the anti-seismic property of a building is damaged due to the fact that a large-scale radiation device shielding room is large in space span and high in floor height requirement and a protective wall body of the shielding room easily occupies the space of a building structural column and / or a bearing beam during site selection construction is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to large -scale radiation device shielding body building construction technical field, concretely relates to a kind of concrete shielding body structure of large -scale radiation device. BACKGROUND

[0002] With the development of nuclear technology, large-scale radiation devices are increasingly used in industry, agriculture, scientific research and medicine. Large-scale radiation devices mainly include radiation processing devices, non-medical accelerators and radiotherapy devices, among which radiotherapy devices include proton and heavy ion therapy devices, BNCT therapy devices, gamma teletherapy machines (including gamma knives), medical accelerators and the like. Radiation brings great benefits to society, but also causes radiation hazards. The radiation shielding of the shielding room built outside the radiation device should ensure that the personnel outside the shielding room may be exposed to radiation in compliance with the protection requirements of GB18871 4.3. Therefore, the walls of the shielding room are generally thick. Due to the large size of large-scale radiation devices, the spatial span of the shielding room often exceeds the limit span of the building, causing difficulties in site selection and problems in the seismic performance of the building.

[0003] For example, a large cyclotron device weighs more than 10 tons and has a diameter of more than 3 meters. The effective area of the machine room should be no less than 4x4 meters according to the construction requirements, and the thickness of the protective wall around the machine room should be at least 3 meters according to the radiation protection requirements. Therefore, the spatial span of the large cyclotron machine room is at least 10 meters, which exceeds the limit span of the building. When constructing the machine room, the protective wall of the machine room will occupy the space of the structural column of the building, and the construction requires that the floor height of the machine room be no less than 3 meters. For some buildings with low floor height, the roof of the machine room will also occupy the space of the load-bearing beam of the building. However, according to the seismic requirements, the structural column and load-bearing beam must have seismic joints around them. If the protective wall of the machine room occupies the space of the structural column and / or load-bearing beam, the seismic joints will divide the wall, causing the radiation protection of the cyclotron machine room to fail to meet the standard requirements. The current conventional method is to construct the cyclotron machine room in a corner of the bottom floor of the building, and the structural column and / or load-bearing beam is directly cast in the wall of the machine room without leaving seismic joints around it. This method not only causes the building to fail to meet the structural seismic requirements, but also affects the eccentricity of the building due to the large weight of the cyclotron device placed in a corner of the building. SUMMARY

[0004] Therefore, the purpose of the utility model is to provide a concrete shielding body structure of large-scale radiation device, which aims to solve the problem of the large spatial span and high floor height of the shielding room of large-scale radiation device, which easily causes the protective wall of the shielding room to occupy the space of the structural column and / or load-bearing beam of the building, resulting in the destruction of the seismic performance of the building.

[0005] To achieve the above object, the utility model provides the following technical scheme.

[0006] The utility model provides a kind of concrete shield body structure of large radiation device, it includes roof, bottom plate, shear wall and the shield body interior space for placing radiation device formed by the roof, bottom plate, shear wall enclosure, building structure column is fixed on the bottom plate by the shear wall and roof, the building structure column is reserved building seismic joint around, first bracket protection compensation structure is sleeved on the building structure column, and the first bracket protection compensation structure is arranged above the roof.

[0007] Further, building load-bearing beam is arranged in the roof and is connected with the building structure column, the building load-bearing beam is reserved building seismic joint around, second bracket protection compensation structure is sleeved on the building load-bearing beam, and the second bracket protection compensation structure is arranged on one side outside the roof.

[0008] Further, the length of the first bracket protection compensation structure is L1, the width is W1, the cross-sectional length of the building structure column is M1, the width is N1, the width of the building seismic joint is Y, the distance between the first bracket protection compensation structure and the roof is D1, then L1≥6Y+M1, W1≥6Y+N1 or L1≥6Y+N1, W1≥6Y+M1, D1≤Y.

[0009] Further, the length of the second bracket protection compensation structure is L2, the width is W2, the cross-sectional length of the building load-bearing beam is M2, the width is N2, the width of the building seismic joint is Y, the distance between the second bracket protection compensation structure and the roof is D2, then L2≥6Y+M2, W2≥6Y+N2 or L2≥6Y+N2, W2≥6Y+M2, D2≤Y.

[0010] The utility model places the structure column of building in shield body protection wall body, places the load-bearing beam of building in the roof of shield body, and reserves the anti-seismic joint outside structure column and load-bearing beam, to meet the requirement of building structure shockproof;Bracket protection compensation structure is arranged on building structure column and building load-bearing beam, and the setting position and size of bracket protection compensation structure are limited, to ensure that the radiation protection of machine room reaches standard requirement.

[0011] Further, the first bracket protection compensation structure is coincident with the center of the building structure column, and the second bracket protection compensation structure is coincident with the center of the building load-bearing beam.

[0012] Further, the building structure column and the building anti-seismic joint divide the shear wall into a first shear wall close to the interior space of the shielding body and a second shear wall away from the interior space of the shielding body, the thickness of the shear wall meeting the radiation protection requirement is I, the thickness of the first shear wall is I1, the thickness of the second shear wall is I2, the cross-sectional length of the building structure column is M1, and the width is N1, so I = I1 + I2 + M1 or I = I1 + I2 + N1.

[0013] Further, the building load-bearing beam and the building anti-seismic joint divide the roof into a first roof close to the interior space of the shielding body and a second roof away from the interior space of the shielding body, the thickness of the roof meeting the radiation protection requirement is B, the thickness of the first roof is B1, the thickness of the second roof is B2, the cross-sectional length of the building load-bearing beam is M2, and the width is N2, so B = B1 + B2 + M2 or B = B1 + B2 + N2.

[0014] Compared with the prior art, the shielding body structure can well solve the problem of difficult selection of a site for construction of a shielding room of a large radiation device due to that the limit span of a building cannot meet the span requirement of the shielding room or the layer height of the building cannot meet the layer height requirement of the shielding room, avoid the influence of the construction of the shielding room on the anti-seismic performance of the building, meet the anti-seismic requirement of the building structure, increase the range of selection of a site for construction of the shielding room, and the shielding body structure can set the large radiation device at the center position of the building, so that the eccentricity of the building is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structure schematic view of a large radiation device concrete shielding body provided for Embodiment 1 is shown in the figure.

[0016] Figure 2 For Figure 1 A top view schematic view of the building structure column arranged in the shear wall is shown in the figure.

[0017] Figure 3 A structural schematic diagram of a large radiation device concrete shield provided for the embodiment 2;

[0018] Figure 4 For Figure 3 A top view schematic diagram of a building load-bearing beam arranged in a top plate.

[0019] Legend:

[0020] 1-top plate; 11-first top plate; 12-second top plate; 2-bottom plate; 3-shear wall; 31-first shear wall; 32-second shear wall; 4-internal space; 5-building structure column; 6-building anti-seismic joint; 71-first bracket protection compensation structure; 72-second bracket protection compensation structure; 8-building load-bearing beam. DETAILED DESCRIPTION

[0021] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below in combination with specific embodiments.

[0022] Embodiment 1:

[0023] The embodiment is suitable for site selection construction of a large radiation device shield room, which meets the layer height requirement of the shield room. Referring to Figure 1 and Figure 2 , the embodiment provides a concrete shield structure for a large radiation device, which comprises a top plate 1, a bottom plate 2, a shear wall 3, and a shield internal space 4 for placing a radiation device formed by the top plate, the bottom plate, and the shear wall, a building structure column 5 penetrates through the shear wall 3 and the top plate 1 and is fixed on the bottom plate 2, a building anti-seismic joint 6 is reserved around the building structure column 5, a first bracket protection compensation structure 71 is sleeved on the building structure column 5, and the bracket protection compensation structure 71 is arranged above the top plate 1.

[0024] Due to the earthquake-resistant joint reserved outside the building structure column, the first bracket protection compensation structure 71 is sleeved on the building structure column above the top plate in the embodiment, so that the radiation protection of the shielding room meets the standard requirements. Specifically, in order to ensure the radiation protection effect of the first bracket protection compensation structure 71, the length of the first bracket protection compensation structure is L1, the width is W1, the cross-sectional length of the building structure column is M1, the width is N1, the width of the building earthquake-resistant joint is Y, and the distance between the first bracket protection compensation structure and the top plate is D1. Then L1≥6Y+M1, W1≥6Y+N1 or L1≥6Y+N1, W1≥6Y+M1, and D1≤Y. Further, the thickness of the first bracket protection compensation structure should be ≥2Y, and the minimum should not be less than 500mm. In the embodiment, the width Y of the building earthquake-resistant joint is ≥150mm, so the thickness of the first bracket protection compensation structure should be above 500mm.

[0025] Further, the building structure column 5 and the building earthquake-resistant joint 6 divide the shear wall into a first shear wall 31 close to the interior space of the shielding body and a second shear wall 32 away from the interior space of the shielding body. The thickness of the shear wall meeting the radiation protection requirements is I, the thickness of the first shear wall is I1, the thickness of the second shear wall is I2, the cross-sectional length of the building structure column is M1, and the width is N1. Then I=I1+I2+M1 or I=I1+I2+N1, and the thickness I1 of the first shear wall 31 and the thickness I2 of the second shear wall 32 should be at least above 500mm.

[0026] In the embodiment, the first bracket protection compensation structure 71 is sleeved with the center of the building structure column 5, and the length of the first bracket protection compensation structure 71 protruding outside the building structure column 5 is three times the width of the building earthquake-resistant joint 6.

[0027] Embodiment 2:

[0028] The embodiment is suitable for the site selection and construction of a large radiation device shielding room whose building layer height cannot meet the shielding room layer height requirement. The shielding body structure provided in the embodiment is different from that in embodiment 1. Referring to Figure 3 and Figure 4 , the building load-bearing beam 8 is arranged in the top plate 1 and connected with the building structure column 5, the building load-bearing beam 8 is provided with the building earthquake-resistant joint 6 around, the second bracket protection compensation structure 72 is sleeved on the building load-bearing beam 8, and the second bracket protection compensation structure 72 is arranged on one side outside the top plate.

[0029] The second bracket protection compensation structure 72 is provided to ensure that the radiation protection performance of the roof meets the standard requirements. Specifically, the length of the second bracket protection compensation structure is L2, the width of the second bracket protection compensation structure is W2, the cross-sectional length of the building load-bearing beam is M2, the width of the building load-bearing beam is N2, the width of the building seismic joint is Y, the distance between the second bracket protection compensation structure and the roof is D2, L2≥6Y+M2, W2≥6Y+N2, or L2≥6Y+N2, W2≥6Y+M2, and D2≤Y. Further, the thickness of the second bracket protection compensation structure should be ≥2Y, and is at least not less than 500 mm. In this embodiment, the width of the building seismic joint Y≥150 mm, and the thickness of the second bracket protection compensation structure should be more than 500 mm.

[0030] Further, the building load-bearing beam 8 and the building seismic joint 6 divide the roof 1 into a first roof 11 close to the interior space of the shielding body and a second roof 12 away from the interior space of the shielding body. The thickness of the roof meeting the radiation protection requirements is B, the thickness of the first roof is B1, the thickness of the second roof is B2, the cross-sectional length of the building load-bearing beam is M2, and the width of the building load-bearing beam is N2. Then, B=B1+B2+M2 or B=B1+B2+N2, and the thickness B1 of the first roof 11 and the thickness B2 of the second roof 12 should be at least more than 500 mm.

[0031] In this embodiment, the second bracket protection compensation structure 72 is coaxially sleeved with the building load-bearing beam 8, and the length of the second bracket protection compensation structure 72 protruding out of the building load-bearing beam 8 is three times the width of the building seismic joint 6.

[0032] Embodiment 3:

[0033] In this embodiment, the radiation protection effect of the shielding body structure provided in embodiment 1 is verified by actual construction.

[0034] A hospital is equipped with PET-CT and cyclotron for early detection and diagnosis of major diseases. The cyclotron has a proton energy of 10 MeV. The cyclotron room is constructed using the concrete shielding structure disclosed in Embodiment 1. The cyclotron room meets the radiation protection requirements of a shear wall with a wall thickness of 3200 mm, a top plate thickness of 2400 mm, a bottom plate thickness of 1200 mm, a building seismic joint width of 200 mm, a building structure column section length of 1000 mm, a building structure column section width of 800 mm, a first bracket protection compensation structure length of 2200 mm, a first bracket protection compensation structure width of 2000 mm, a first bracket protection compensation structure thickness of 500 mm, a gap width between the first bracket protection compensation structure and the top plate of 150 mm, and a gap width between the top plate and the building floor of 1000 mm (Note: The shear wall wall thickness, top plate thickness, and bottom plate thickness are determined according to the equipment requirements and site layout factors. The building seismic joint and structure column size are determined according to the building requirements). The top plate, the bottom plate, the shear wall, and the first bracket protection compensation structure are formed by one-time pouring of reinforced concrete with a density of ≥2.35 g / cm3. 3 A device transport inlet is provided on the shear wall, and an electric sliding protection door or an electric vertical sliding protection door is used. When the protection door is closed, it should meet the same protection requirements of the wall where it is located, and the door body is added with a protection neutron material.

[0035] The cyclotron room is constructed according to the above structure size. After the construction is completed, the radiation shielding of the cyclotron is monitored. The monitoring reference standards are as follows:

[0036] 1. Radiation Shielding Specification for Radiotherapy Machine Room Part 1: General Principles (GBZ / T201.1-2007);

[0037] 2. Radiation Protection Requirements for Electron Accelerator Radiotherapy (GBZ126-2011).

[0038] The monitoring results are as follows: During the cyclotron pharmaceutical process, in the non-working state, the X-γ radiation dose rate range around the cyclotron room is (60.1-75.2) nGy / h; in the on-state (10 MeV, 45 μA), the cyclotron outputs 945 mCi of F-18, and the X-γ radiation dose rate range around the accelerator room is (61.0-79.5) nGy / h, and no neutrons are detected, which is lower than the standard limit value of 2.5 μSv / h specified in the Radiation Protection Requirements for Electron Accelerator Radiotherapy (GBZ126-2011).

[0039] In summary, the concrete shielding structure provided in this embodiment ensures the radiation protection requirements of the shielding room of a large radiation device.

[0040] The above are only preferred embodiments of the present application, and it should be pointed out that the above preferred embodiments should not be regarded as a limitation to the present application, and the protection scope of the present application should be subject to the range defined by the claims. For ordinary skilled in the art, some improvements and refinements can be made without departing from the spirit and scope of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A concrete shield structure of a large radiation device, comprising a top plate, a bottom plate, shear walls, and a shield inner space for placing a radiation device, which is enclosed by the top plate, the bottom plate, and the shear walls, characterized in that: Building structure column is fixed on the bottom plate through the shear wall and the roof, and a building anti-seismic joint is reserved around the building structure column.

2. A concrete shield structure for a large radiation device according to claim 1, characterized in that: A building load-bearing beam is arranged in the roof and connected with the building structure column, and the building anti-seismic joint is reserved around the building load-bearing beam.

3. A concrete shield structure for a large radiation device according to claim 1, characterized in that: The length of the first bracket protective compensation structure is L1, the width is W1, the cross-sectional length of the building structure column is M1, the width is N1, the width of the building anti-seismic joint is Y, and the distance between the first bracket protective compensation structure and the roof is D1, then L1≥6Y+M1, W1≥6Y+N1 or L1≥6Y+N1, W1≥6Y+M1, and D1≤Y.

4. A concrete shield structure for a large radiation device according to claim 2, characterized in that: The length of the second bracket protective compensation structure is L2, the width is W2, the cross-sectional length of the building load-bearing beam is M2, the width is N2, the width of the building anti-seismic joint is Y, and the distance between the second bracket protective compensation structure and the roof is D2, then L2≥6Y+M2, W2≥6Y+N2 or L2≥6Y+N2, W2≥6Y+M2, and D2≤Y.

5. A concrete shield structure for a large radiation device according to claim 1, characterized in that: The first bracket protective compensation structure is coincident with the center of the building structure column.

6. A concrete shield structure for a large radiation device according to claim 2, characterized in that: The second bracket protective compensation structure is coincident with the center of the building load-bearing beam.

7. A large radiation device concrete shield structure according to claim 1, characterized in that: The building structure column and the building anti-seismic joint divide the shear wall into a first shear wall close to the internal space of the shielding body and a second shear wall away from the internal space of the shielding body, the thickness of the shear wall meeting the radiation protection requirement is I, the thickness of the first shear wall is I1, the thickness of the second shear wall is I2, the cross-sectional length of the building structure column is M1, and the width is N1, then I=I1+I2+M1 or I=I1+I2+N1.

8. A concrete shield structure for a large radiation device according to claim 7, characterized in that: I1≥500mm, I2≥500mm.

9. A concrete shield structure for a large radiation device according to claim 2, characterized in that: The building load-bearing beam and the building anti-seismic joint divide the roof into a first roof close to the internal space of the shielding body and a second roof away from the internal space of the shielding body, the thickness of the roof meeting the radiation protection requirement is B, the thickness of the first roof is B1, the thickness of the second roof is B2, the cross-sectional length of the building load-bearing beam is M2, and the width is N2, then B=B1+B2+M2 or B=B1+B2+N2.

10. A concrete shield structure for a large radiation device according to claim 9, characterized in that: B1≥500mm, B2≥500mm.

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