A high-performance concrete air-raid shelter door that is impact-resistant and protects against neutron radiation

Abstract

This invention discloses an impact-resistant and neutron radiation-shielding ultra-high performance concrete air-raid shelter door, comprising two ultra-high performance concrete door panels, with a filling layer between the two panels. The filling layer includes water-absorbing resin containing boric acid solution. A plurality of unidirectional displacement connectors are installed at equal intervals between the two ultra-high performance concrete door panels, located within the filling layer. Through holes are installed on the outer side of the ultra-high performance concrete door panels, communicating with the interior of the door panels. This invention provides an impact-resistant and radiation-shielding ultra-high performance concrete air-raid shelter door that can not only resist blast impacts from both inside and outside the door through the ultra-high performance concrete door panels and the filling layer, but also shield neutrons and gamma rays of different energy levels through the boric acid solution in the water-absorbing resin of the filling layer. It can meet the complex and diverse protection requirements of today and has universal applicability.

Description

Technical Field

[0001] This invention relates to the field of civil defense engineering and civil defense door technology, and in particular to an impact-resistant and neutron radiation-proof ultra-high performance concrete civil defense door. Background Technology

[0002] To meet the various protection requirements of civil defense entrances under extreme circumstances, it is necessary to seek a civil defense door with comprehensive protection functions.

[0003] The main protective functions of civil defense doors are resistance to blast wave impact and radiation protection. Conventional civil defense doors have relatively simple functions. They either increase the thickness of the doors to resist blast wave impact, which wastes costs and is inconvenient for on-site construction and installation; or they use anti-radiation coatings to shield neutron radiation. However, in reality, the range of neutron energy levels reaching civil defense doors is wide, and a single anti-radiation coating is difficult to achieve a full neutron shielding effect.

[0004] Therefore, there is an urgent need for a new type of impact-resistant, neutron radiation-proof, ultra-high performance concrete air-raid shelter door to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an impact-resistant and neutron radiation-proof ultra-high performance concrete air-raid shelter door to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides an impact-resistant and neutron radiation-proof ultra-high performance concrete air-raid shelter door, comprising two ultra-high performance concrete door panels, a filling layer between the two ultra-high performance concrete door panels, the filling layer comprising water-absorbing resin containing boric acid solution, a plurality of unidirectional displacement connectors equally spaced between the two ultra-high performance concrete door panels, the plurality of unidirectional displacement connectors being located within the filling layer, and through holes installed on the outer side of the ultra-high performance concrete door panels, the through holes communicating with the interior of the ultra-high performance concrete door panels.

[0007] Preferably, the ultra-high performance concrete door panel is made of ultra-high performance concrete, which contains steel fibers.

[0008] Preferably, the ultra-high performance concrete door panel is provided with a number of reinforcing steel bars.

[0009] Preferably, the filler layer is a water-absorbing resin, and the water-absorbing resin contains the boric acid solution.

[0010] Preferably, the two unidirectional displacement connectors located at the same horizontal position are adapted to each other.

[0011] Preferably, the filling layer further includes a rubber kit and a rubber seal, the outer side of the unidirectional displacement connector is covered by the rubber kit, and the rubber seal is located on the outer side of the absorbent resin.

[0012] Preferably, the two ultra-high performance concrete door panels and the filling layer are sealed with steel strips around their perimeter.

[0013] The present invention discloses the following technical effects: By applying pressure to two ultra-high performance concrete door panels, the present invention causes the entire air defense door to be in a state of slight compression, and the buffer components are interlocked and connected, so that the layers of each component are stacked together by internal force, thereby forming a stable whole; the air defense door structure of the present application is symmetrically arranged and can resist impact damage from two directions.

[0014] This invention provides an impact-resistant and radiation-shielding ultra-high performance concrete air-raid shelter door. It not only withstands blast impacts from both the inside and outside of the door through its ultra-high performance concrete door panel and filling layer, but also shields neutrons and gamma rays of different energy levels through the boric acid solution in the water-absorbing resin within the filling layer. It can meet the complex and diverse protection requirements of today and has universal applicability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of the impact-resistant and neutron radiation-proof ultra-high performance concrete air-raid shelter door of the present invention;

[0017] Figure 2 This is a cross-sectional schematic diagram of the impact-resistant and neutron radiation-proof ultra-high performance concrete air-raid shelter door of the present invention;

[0018] Figure 3 This is a schematic diagram of the connection structure of a unidirectional displacement connector;

[0019] Figure 4 The relationship between shielding performance under different neutron energies and water-absorbing resin thicknesses;

[0020] Figure 5 The relationship between the thickness of the water-absorbing resin for a 4.5 megahertz americium neutron source and its shielding performance;

[0021] The components include: 1. Ultra-high performance concrete door panel; 2. Reinforcing steel bars; 3. Water-absorbing resin; 4. One-way displacement connector; 5. Rubber kit; 6. Rubber edge sealing; 7. Steel fiber; 8. Steel strip edge sealing; and 9. Through hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Reference Figure 1-5 This invention provides an impact-resistant and neutron radiation-proof ultra-high performance concrete air-raid shelter door, comprising two ultra-high performance concrete door panels 1, with a filling layer between the two ultra-high performance concrete door panels 1. The filling layer includes water-absorbing resin 3, and the water-absorbing resin 3 contains boric acid solution. A plurality of unidirectional displacement connectors 4 are installed at equal intervals between the two ultra-high performance concrete door panels 1, and the plurality of unidirectional displacement connectors 4 are located in the filling layer. A through hole 9 is installed on the outer side of the ultra-high performance concrete door panel 1, and the through hole 9 communicates with the inside of the ultra-high performance concrete door panel 1.

[0025] By applying pressure to the two ultra-high performance concrete door panels 1, the entire air-raid shelter door is in a state of slight compression, and the one-way displacement connector 4 is connected to each other, so that the internal forces of each component layer are superimposed together, thereby forming a stable whole; the air-raid shelter door structure of this application is symmetrically arranged and can resist impact damage from two directions.

[0026] Further optimization of the design: the ultra-high performance concrete door panel 1 is made of ultra-high performance concrete, which contains steel fibers 7.

[0027] Further optimization of the design involves incorporating several reinforcing steel bars 2 within the ultra-high performance concrete door panel 1. The diameter of these reinforcing steel bars ranges from φ8 to φ16.

[0028] The ultra-high performance concrete door panel 1 is cast from ultra-high performance concrete containing steel fibers 7. The steel fiber 7 content accounts for 1%-3% of the total concrete volume. The flexural strength of ultra-high performance concrete is 5 to 10 times that of ordinary concrete, and its fracture toughness is 100 to 200 times that of ordinary concrete. The incorporated steel fibers 7 and the internal reinforcing steel bars 2 greatly improve the impact resistance of the ultra-high performance concrete door panel 1. The thickness of the ultra-high performance concrete door panel 1 for civil defense can be significantly reduced compared to that of conventional concrete door panels for civil defense without affecting the mechanical damage resistance of the civil defense door. The water permeability coefficient is 1 / 6 to 1 / 15 of that of ordinary concrete, and the freeze-thaw peel resistance is 1 / 10 to 1 / 100 of that of ordinary concrete. The use of ultra-high performance concrete door panel 1 can effectively reduce the erosion of the ultra-high performance concrete door panel 1 by the water-absorbing resin 3, prevent the penetration of overflowing water, have a water retention function, improve the resistance to freeze-thaw cycles, and improve the durability of the ultra-high performance concrete door panel 1.

[0029] Saturated water-absorbing resin 3 swells into hydrogel particles after absorbing water, exhibiting excellent water-locking properties and preventing water leakage under pressure. Even if micro-cracks appear on the ultra-high performance concrete door panel 1, the water absorbed by the water-absorbing resin 3 will not seep out, reducing erosion of the internal unidirectional displacement connector 4 and the ultra-high performance concrete door panel 1, and preventing a decrease in neutron shielding effect due to water loss. The water-absorbing resin 3 is evenly distributed in the cavity formed by the two ultra-high performance concrete door panels 1 and the rubber kit 5, and the cavity is tightly sealed with rubber edge sealing 6 and steel strip edge sealing 8. A through hole 9 is pre-reserved in the door handle assembly; the through hole 9 serves as a water level detection hole and a water injection hole.

[0030] The absorbent resin 3 saturates and absorbs the boric acid solution. The iron in the steel of the ultra-high performance concrete door panel 1 slows down fast neutrons, the water in the boric acid solution further slows down and shields medium-energy neutrons, and the boron in the boric acid solution absorbs slow neutrons. Therefore, when the provided air-raid shelter door is exposed to radiation, the synergistic effect of these three elements ultimately reduces high-energy neutrons to slow neutrons. These slow neutrons can then be directly absorbed by the boron in the boric acid solution, reducing the generation of secondary gamma rays. This achieves a comprehensive shielding effect against neutrons of different energy ranges.

[0031] The scheme was further optimized so that the two unidirectional displacement connectors 4 located at the same horizontal position interlock with each other.

[0032] In a further optimized design, the filling layer also includes a rubber kit 5 and a rubber seal 6. The rubber kit 5 covers the outer side of the unidirectional displacement connector 4, and the rubber seal 6 is located on the outer side of the absorbent resin 3.

[0033] The rubber kit 5 and rubber edge sealing 6 possess sufficient rigidity and elasticity in the direction perpendicular to the ultra-high performance concrete door panel 1, enabling them to undergo extrusion deformation to reduce impact energy under sudden and severe impact loads. Furthermore, they are evenly distributed between the two ultra-high performance concrete door panels 1, ensuring that when one ultra-high performance concrete door panel 1 is impacted, the impact force can be evenly transferred to the other ultra-high performance concrete door panel 1 through the rubber kit 5 and rubber edge sealing 6, preventing damage to the ultra-high performance concrete door panel 1 due to excessive local stress.

[0034] The design was further optimized by fixing steel strips 8 around the two ultra-high performance concrete door panels 1 and the filling layer. The rubber kit 5 and the rubber sealing strip 6 form a closed and airtight space with the ultra-high performance concrete door panels 1, which also serves to prevent moisture penetration.

[0035] Experiments were conducted according to the above embodiments.

[0036] Experiment 1: The thickness of the ultra-high performance concrete door panel 1 was set to 60mm, and the thickness of the water-absorbing resin 3 saturated with boric acid solution was set to 0cm, 1cm, 2cm, and 3.5cm respectively. A radiation resistance experiment was simulated using neutrons of different energy levels.

[0037] Table 1 Transmittance of neutrons at different energies

[0038]

[0039] Experiment 2: The thickness of the ultra-high performance concrete door panel 1 was set to 60mm and 80mm respectively, and the thickness of the water-absorbing resin 3 saturated with boric acid solution was set to 0cm, 1cm, 2cm, and 3.5cm respectively. A neutron source with an average energy of 4.5meV in the americium wave range (energy range of 4.14×10⁻⁶) was used. -7 ~1.10×10 meV) simulated radiation resistance experiment:

[0040] Table 2 Transmittance of different combinations

[0041]

[0042] The above two sets of experiments demonstrate that water-absorbing resin 3 containing boric acid solution can achieve neutron shielding very effectively, and the shielding effect will be significantly improved as the thickness of water-absorbing resin 3 (boric acid solution content) increases.

[0043] This invention provides an impact-resistant and radiation-proof ultra-high-performance concrete air-raid shelter door. It not only withstands blast impacts from both the inside and outside of the door through high-strength door panels and energy-absorbing devices, but also shields neutrons and gamma rays of different energy levels through the synergistic effect of three different neutron-shielding materials. It can meet the complex and diverse protection requirements of today and has universal applicability.

[0044] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0045] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high-performance concrete air-raid shelter door that is impact-resistant and protects against neutron radiation, characterized in that: The device includes two ultra-high performance concrete door panels (1), with a filling layer between the two ultra-high performance concrete door panels (1). The filling layer includes water-absorbing resin (3), which contains boric acid solution. Several unidirectional displacement connectors (4) are installed at equal intervals between the two ultra-high performance concrete door panels (1). The several unidirectional displacement connectors (4) are located within the filling layer. Through holes (9) are installed on the outer side of the ultra-high performance concrete door panels (1). The through holes (9) are water detection holes and water injection holes. The through holes (9) are connected to the inside of the ultra-high performance concrete door panels (1). The two unidirectional displacement connectors (4) located at the same horizontal position are adapted to each other. The filling layer also includes a rubber kit (5) and a rubber seal (6). The rubber kit (5) covers the outer side of the unidirectional displacement connectors (4). The rubber seal (6) is located on the outer side of the water-absorbing resin (3). Steel strip seals (8) are fixed around the two ultra-high performance concrete door panels (1) and the filling layer. By applying pressure to the two ultra-high performance concrete door panels (1), the entire air defense door is in a state of slight compression, and the one-way displacement connector (4) is connected to each other, so that the internal forces of each component layer are superimposed together, thereby forming a stable whole; the air defense door can resist impact damage from two directions. The rubber kit (5) and the rubber edge seal (6) have sufficient rigidity and elasticity in the direction perpendicular to the ultra-high performance concrete door panel (1), and can generate extrusion deformation to reduce impact energy when subjected to sudden and severe impact loads. The one-way displacement connector (4) includes a straight section and a bent section. One end of the straight section is installed on the ultra-high performance concrete door panel (1), and the other end of the straight section is a bent section. The outer side of the interlocking part of the bent sections of the two one-way displacement connectors (4) at the same horizontal position is covered with the rubber kit (5). The ultra-high performance concrete door panel (1) is provided with several reinforcing steel bars (2).

2. The impact-resistant and neutron radiation-proof ultra-high performance concrete air-raid shelter door according to claim 1, characterized in that: The ultra-high performance concrete door panel (1) is made of ultra-high performance concrete containing steel fibers (7).

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