CN111236729B - Steel bar series-connection polyurea material spraying sandwich ball anti-explosion wall and manufacturing method thereof - Google Patents
Steel bar series-connection polyurea material spraying sandwich ball anti-explosion wall and manufacturing method thereof Download PDFInfo
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- CN111236729B CN111236729B CN202010023705.0A CN202010023705A CN111236729B CN 111236729 B CN111236729 B CN 111236729B CN 202010023705 A CN202010023705 A CN 202010023705A CN 111236729 B CN111236729 B CN 111236729B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/04—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against air-raid or other war-like actions
- E04H9/10—Independent shelters; Arrangement of independent splinter-proof walls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
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Abstract
A steel bar series polyurea material spraying sandwich ball anti-explosion wall comprises a wall body, a plurality of sandwich ball strings, a reinforced concrete buckle cover and a steel plate buckle cover, wherein a cavity is formed in the wall body, the sandwich ball strings are filled in the cavity of the wall body and used for changing the penetration direction of a projectile body or a fragment and dispersing the impact kinetic energy of a high-speed fragment, the reinforced concrete buckle cover is used for sealing the cavity of the wall body, and the steel plate buckle cover is used for tightly pressing the reinforced concrete buckle cover on the top of the wall body; the wall body is of a reinforced concrete structure; the manufacturing method of the wall body comprises the following steps: firstly, manufacturing a reinforcement cage, then installing a template, pouring concrete, and removing the template after the concrete reaches the strength to form a wall body with a cavity; filling a plurality of sandwich ball strings in the cavity; manufacturing a reinforced concrete buckle cover and installing the reinforced concrete buckle cover on the top of the wall body, and then pressing the reinforced concrete buckle cover on the top of the wall body by the steel plate buckle cover; the steel bar series-connection polyurea material spraying sandwich ball anti-explosion wall can play a role in protecting and resisting explosion by consuming explosion shock waves and fragment energy.
Description
Technical Field
The invention belongs to the field of building structures, and particularly relates to an anti-explosion wall with steel bars connected in series and sprayed with polyurea materials and sandwich balls and a manufacturing method of the anti-explosion wall.
Background
Civil air defense engineering also calls civil air defense workers, and refers to underground protective buildings which are independently built for guaranteeing personnel and material shelter, civil air defense command and medical rescue in wartime, and basements which are built by combining ground buildings and can be used for air defense in wartime.
The great amount of civil air defense projects are changed from the single use function in wartime in the past to the use function in normal times, and the combat readiness benefit, the social benefit and the economic benefit of the civil air defense projects need to be realized. The method in the specification comprises two types of prefabricated concrete member combined walls and sand bag piling and piling, but both of the prefabricated concrete member combined walls and the sand bag piling and piling need to occupy a large amount of personnel and material resources, and when the civil air defense construction amount is large, the imminent installation of the anti-explosion partition walls and the anti-explosion partition walls becomes a task which cannot be completed; when the sand bags are piled, the situation that fragments rebound to cause injury also exists, so that the development of a protective structure capable of efficiently resisting explosion and penetration is urgently needed. .
Disclosure of Invention
The invention aims to provide an anti-explosion wall with steel bars connected in series and sprayed with polyurea material sandwich balls and a manufacturing method thereof.
The invention aims to realize the following technical scheme, and provides a steel bar series polyurea material spraying sandwich ball anti-explosion wall which comprises a wall body 1, a plurality of sandwich ball strings, a reinforced concrete buckle cover 3 and a steel plate buckle cover 4, wherein the wall body 1 is internally provided with a cavity, the sandwich ball strings are filled in the cavity of the wall body 1 and are used for changing the penetration direction of a projectile body or a fragment and dispersing the impact kinetic energy of a high-speed fragment, the reinforced concrete buckle cover 3 is used for sealing the cavity of the wall body 1, and the steel plate buckle cover 4 is used for tightly pressing the reinforced concrete buckle cover 3 on the top of the wall body 1; the wall body 1 is of a reinforced concrete structure; each sandwich ball string comprises a plurality of closely arranged sandwich balls 2 for changing the penetration direction of the projectile bodies or fragments entering the cavity of the wall body 1 and a plurality of connecting reinforcing steel bars 5 for connecting the sandwich balls 2 in series into a whole, and the outer surface of each sandwich ball 2 is sprayed with polyurea materials; the sandwich sphere 2 comprises a core 201 and a shell 202 which is arranged outside the core 201 and wraps the core 201; a through hole 203 for the connecting steel bar 5 to pass through is also arranged in the sandwich sphere 2; the polyurea material is sprayed on the outside of the housing 202.
Preferably, the wall body 1 is cast by high-strength concrete.
Preferably, the inner core 201 is made of a rounded granite sphere and the shell 202 is made of a foamed aluminum material.
Preferably, the shell 202 is a split structure, and the shell 202 includes an upper hemispherical shell 204 and a lower hemispherical shell 205, which are used together to form a whole and enclose the inner core 201.
Preferably, the steel plate buckle cover 4 is a U-shaped structure to ensure that it can tightly cover and buckle the reinforced concrete buckle cover 3.
The invention provides a method for manufacturing an anti-explosion wall with steel bars connected in series and sprayed with polyurea material sandwich balls, which comprises the following steps:
s1: designing reinforcement according to the reinforcement ratio, binding vertical reinforcements, horizontal reinforcements and stirrups to form a reinforcement cage, then installing formworks around the reinforcement cage, then pouring concrete, and removing the formworks after the concrete reaches the strength to form a wall body (1) with a cavity;
s2: filling a plurality of sandwich ball strings in the cavity;
s3: manufacturing a reinforced concrete buckle cover (3), installing the reinforced concrete buckle cover (3) on the top of a wall body, then manufacturing a steel plate buckle cover (4) by using a steel plate, pressing the reinforced concrete buckle cover (3) on the top of the wall body by using the steel plate buckle cover (4) so as to seal the cavity, and then fixing two ends of the steel plate buckle cover (4) on the wall body (1).
The invention has the following advantages:
1. the anti-explosion wall formed by filling the wall body with the steel bar series sandwich spheres has the advantages that the anti-explosion core material sandwich ball strings have good integrity and are not easy to scatter, can play a role in consuming explosion shock waves and fragment energy, and can greatly improve the bulletproof and anti-explosion capability of the wall body.
The foregoing is a summary of the present invention, and for the purposes of promoting a clear understanding of the technical means of the present invention, the present invention may be embodied in the form of the following detailed description, taken in conjunction with the accompanying drawings, wherein:
drawings
Fig. 1 is a schematic structural view of an anti-explosion wall with steel bars connected in series and sprayed with polyurea material sandwich balls.
Fig. 2 is a cross-sectional view at a-a in fig. 1.
Fig. 3 is a side view of the reinforced steel bar series-connection polyurea material sandwich ball blast-resistant wall of the embodiment.
FIG. 4 is a schematic structural view of a sandwich sphere coated with polyurea material according to this embodiment.
Fig. 5 is a schematic view of the structure of the sandwich sphere in this embodiment.
Fig. 6 is a bottom view of the reinforced concrete cover in this embodiment.
Fig. 7 is a front view of the reinforced concrete buckle cover in the present embodiment.
Fig. 8 is a front view of the steel plate buckle cover in the present embodiment.
[ description of main element symbols ]
1-a wall body; 2-sandwich sphere, 201-inner core, 202-shell, 203-through hole, 204-upper hemispherical shell, 205-lower hemispherical shell, 206-bump, 207-groove, 3-reinforced concrete buckle cover, 4-steel plate buckle cover and 5-connecting steel bar.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the predetermined purpose, the following detailed description of the anti-explosion wall with steel bar series-sprayed polyurea material sandwich ball and the manufacturing method thereof according to the present invention will be provided with reference to the accompanying drawings and preferred embodiments, and the detailed description of the embodiments, structures, features and effects thereof will be provided.
Referring to fig. 1 to 4, the reinforced-bar series-spraying polyurea material sandwich ball blast-resistant wall of the embodiment includes a wall body 1 with a cavity inside, the thickness b of the wall body 1 is 160mm to 240mm, the width h of the cavity is 300mm to 500mm, in order to improve the penetration resistance of the wall body, the wall body 1 is of a reinforced concrete structure and is poured by high-strength concrete, because the wall body is specially used for penetration resistance, basic stress requirements such as bending, pulling and pressing do not need to be considered according to building construction requirements, when reinforcing the wall body, the reinforcing rate of the wall body is 0.25% higher than the smallest reinforcing rate of a common shear wall, so that the reinforcing rate of the wall body 1 is 0.4% to 0.8%, wherein bolt connecting holes with the radius of 10mm to 15mm are reserved in the lateral direction of the wall body, and the wall body can be connected and assembled according to the engineering conditions; the cavity is filled with a plurality of sandwich ball strings, the sandwich ball strings are tightly arranged in the cavity of the wall body, each sandwich ball string comprises a plurality of tightly arranged sandwich balls 2 used for changing the penetration direction of the projectile bodies or fragments entering the cavity of the wall body 1 and a plurality of sandwich balls 2 which are connected in series to form a whole connecting reinforcing steel bar 5, and the outer surface of each sandwich ball 2 is sprayed with polyurea materials.
Referring to fig. 5, the sandwich sphere 2 includes a core 201 and a shell 202 disposed outside the core 201 and wrapping the core 201, the core 201 is a sphere made of granite and having a radius r of 80mm to 100mm, and the dynamic compressive strength of granite is generally greater than 100MPa, so that the penetration resistance and energy consumption of the sandwich sphere can be improved by using the granite sphere as the core; the shell 202 is a foamed aluminum wall shell made of a foamed aluminum material and having a thickness d of 10mm-20mm, the shell 202 may be an integral structure or a split structure, in this embodiment, the shell 202 is made into the split structure for convenience of installation, the shell 202 includes an upper hemispherical shell 204 and a lower hemispherical shell 205 used in cooperation with the upper hemispherical shell 204 to form a whole and wrap the core 201, the upper hemispherical shell 204 is provided with a bump 206, the lower hemispherical shell 205 is provided with a groove 207 matched with the bump 206, the bump 206 is provided with an external thread, the groove 207 is provided with an internal thread matched with the external thread, the upper hemispherical shell 204 is installed on the lower hemispherical shell 205 in a threaded connection manner, of course, in other embodiments of the present invention, the upper hemispherical shell 204 may also be installed on the lower hemispherical shell 205 in a covering, clamping or other manners; the thickness of the polyurea material is 3mm-8mm, and the polyurea material is sprayed on the outer surface of the shell 202, so that a polyurea material-wrapped foamed aluminum granite sandwich spherical structure is formed; the sandwich sphere 2 is also internally provided with a through hole 203 with the diameter of 6mm-10mm for the connecting steel bar 5 to pass through, the sandwich sphere 2 can be used for changing the penetration direction of the projectile body or fragment and dispersing the impact kinetic energy of high-speed fragment, the steel bar is connected with the sandwich sphere in series, the integrity of the protective material can be enhanced, and the sandwich sphere and the protective material are ensured not to be easily scattered.
In the embodiment, polyurea materials are sprayed on the outer surface of the sandwich sphere 2 after the sandwich sphere 2 is manufactured, and then the sandwich sphere 2 sprayed with the polyurea materials is connected in series into a whole by the connecting steel bars 5; of course, in other embodiments of the present invention, the connection steel bars 5 may be connected in series to form a whole, and the polyurea material is sprayed on the outer surface of each sandwich sphere 2 by the spraying gun.
When the sandwich sphere 2 is penetrated by the projectile or the fragment, the sandwich sphere 2 can play a role in energy consumption, that is, the projectile or the fragment is shot from a certain direction of the polyurea material and then shot from the other direction of the polyurea material layer 202 after sequentially passing through the shell 202 and the core 201, or the projectile or the fragment passes through the shell 202 and then penetrates out from one side of the polyurea material layer 202 after being shot by the core 201, so that the multiple blocking energy consumption of the projectile or the fragment is realized, and meanwhile, if the projectile or the fragment hits the steel bar, the steel bar can play a role in consuming the kinetic energy of the impacting body.
Referring to fig. 1, 3, 6, 7 and 8, a reinforced concrete buckle cover 3 for sealing a cavity of the wall 1 and a steel plate buckle cover 4 for tightly pressing the reinforced concrete buckle cover 3 to the top of the wall 1 are further installed at the top of the wall 1, a boss is arranged at the bottom of the reinforced concrete buckle cover 3, the size of the boss is consistent with the internal size of the cavity, when the reinforced concrete buckle cover 3 is installed at the top of the wall 1, the boss is installed in the cavity and seals the cavity, the steel plate buckle cover 4 is U-shaped, and two ends of the steel plate buckle cover are fixed on the wall 1 through bolts, so that the reinforced concrete buckle cover 3 is prevented from being loosened in the using process. In this embodiment, the steel plate buckle cover is machined from a steel plate with a thickness of 5 mm.
According to the anti-explosion wall with the steel bar series sprayed polyurea material sandwich ball, the invention also provides a manufacturing method of the anti-explosion wall with the steel bar series sprayed polyurea material sandwich ball, which comprises the following steps:
s1: designing reinforcement according to the reinforcement ratio, binding vertical reinforcements, horizontal reinforcements and stirrups to form a reinforcement cage, then installing formworks around the reinforcement cage, then pouring concrete, and removing the formworks after the concrete reaches the strength to form a wall body 1 with a cavity;
s2: filling a plurality of sandwich ball strings formed by sandwich balls which are connected in series by reinforcing steel bars and are sprayed with polyurea materials into the cavities;
s3: manufacturing a reinforced concrete buckle cover 3, installing the reinforced concrete buckle cover 3 on the top of a wall body, then manufacturing a steel plate buckle cover 4 by using a steel plate, pressing the reinforced concrete buckle cover 3 on the top of the wall body by using the steel plate buckle cover 4 so as to seal the cavity, and then fixing two ends of the steel plate buckle cover 4 on the wall body 1 by using bolts.
When the bullet or the fragment penetrates to the concrete wall surface, the concrete wall surface firstly plays a role in resisting the bullet or the fragment, so that the impact speed of the bullet or the fragment is greatly reduced. When the projectile body or the fragment penetrates through the concrete wall surface and impacts a sandwich ball string, the sandwich ball body is connected in series by using the steel bars and is placed in the concrete wall body, the polyurea material on the outer side of the sandwich ball body can buffer the impact of the projectile body or the fragment, so that the penetration speed is reduced, and then when the projectile body or the fragment penetrates through the shell 202 and impacts the surface of the inner core 201 made of granite, the impact of the inner core 201 on the projectile body or the fragment generates further buffering; when the projectile body or the fragment impacts the connecting steel bar or the next sandwich sphere sprayed with the polyurea material, the connecting steel bar or the sandwich sphere sprayed with the polyurea material again has a buffering effect on the impact of the connecting steel bar or the next sandwich sphere and changes the motion track of the connecting steel bar or the next sandwich sphere again, so that the projectile body or the fragment collides between the sandwich sphere and the steel bar, the impact energy is effectively consumed, and the wall body has the effect of resisting penetration of the external projectile body or the fragment.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any simple modification, equivalent change and modification made by those skilled in the art according to the technical spirit of the present invention are still within the technical scope of the present invention without departing from the technical scope of the present invention.
Claims (6)
1. The utility model provides a steel bar series connection spraying polyurea material sandwich ball blast resistant wall which characterized in that: the reinforced concrete wall comprises a wall body (1) with a cavity inside, a plurality of sandwich ball strings which are filled in the cavity of the wall body (1) and used for changing the penetration direction of a projectile body or fragment and dispersing the impact kinetic energy of high-speed fragment, a reinforced concrete buckle cover (3) used for sealing the cavity of the wall body (1), and a steel plate buckle cover (4) used for pressing the reinforced concrete buckle cover (3) on the top of the wall body (1); the wall body (1) is of a reinforced concrete structure; each sandwich ball string comprises a plurality of closely arranged sandwich balls (2) for changing the penetration direction of the projectile bodies or fragments entering the cavity of the wall body (1) and a connecting reinforcing steel bar (5) for connecting the plurality of sandwich balls (2) in series into a whole, wherein the outer surface of each sandwich ball (2) is sprayed with polyurea materials; the sandwich sphere (2) comprises an inner core (201) and a shell (202) which is arranged outside the inner core (201) and wraps the inner core (201); a through hole (203) for the connecting steel bar (5) to pass through is also arranged in the sandwich sphere (2); the polyurea material is sprayed on the outer side of the shell (202).
2. The reinforced bar series connection spray polyurea material sandwich ball blast-resistant wall as claimed in claim 1, wherein: the wall body (1) is cast by adopting high-strength concrete.
3. The reinforced bar series connection spray polyurea material sandwich ball blast-resistant wall as claimed in claim 1, wherein: the inner core (201) is made of a rounded granite sphere and the shell (202) is made of a foamed aluminum material.
4. The reinforced bar series connection spray polyurea material sandwich ball blast-resistant wall as claimed in claim 3, wherein: the shell (202) is of a split structure, and the shell (202) comprises an upper hemispherical shell (204) and a lower hemispherical shell (205) which are matched with each other to form a whole and wrap the inner core (201).
5. The manufacturing method of the steel bar series spray polyurea material sandwich ball blast resistant wall according to claim 1, characterized in that: the steel plate buckle cover (4) is of a U-shaped structure which can ensure that the steel plate buckle cover (3) can tightly cover and buckle the reinforced concrete buckle cover.
6. A method for manufacturing the steel bar series spray polyurea material sandwich ball blast resistant wall as claimed in any one of claims 1 to 5, which is characterized in that: the method specifically comprises the following steps:
s1: designing reinforcement according to the reinforcement ratio, binding vertical reinforcements, horizontal reinforcements and stirrups to form a reinforcement cage, then installing formworks around the reinforcement cage, then pouring concrete, and removing the formworks after the concrete reaches the strength to form a wall body (1) with a cavity;
s2: filling a plurality of sandwich ball strings in the cavity;
s3: manufacturing a reinforced concrete buckle cover (3), installing the reinforced concrete buckle cover (3) on the top of a wall body, then manufacturing a steel plate buckle cover (4) by using a steel plate, pressing the reinforced concrete buckle cover (3) on the top of the wall body by using the steel plate buckle cover (4) so as to seal the cavity, and then fixing two ends of the steel plate buckle cover (4) on the wall body (1).
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| CN209686970U (en) * | 2019-03-14 | 2019-11-26 | 南京顶峰创智工程科技有限公司 | A kind of combined type wall to impede bullets |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2817516A1 (en) * | 1978-04-21 | 1979-10-25 | Messerschmitt Boelkow Blohm | Composite protective sheet for vehicle - has plastics or ceramic rings or spheres inside corrugated or grid protected sheets |
| GB9915104D0 (en) * | 1999-06-29 | 1999-09-01 | Willcox Robert D | Blast suppression panel |
| CA2595837A1 (en) * | 2004-12-08 | 2006-08-10 | Armordynamics, Inc. | Methods and apparatus for providing ballistic protection |
| CN105569258B (en) * | 2015-10-16 | 2017-12-01 | 安徽省深美建设环境科技股份有限公司 | Explosion-resistant curtain walls plate |
| CN209025266U (en) * | 2018-09-27 | 2019-06-25 | 徐州工润建筑科技有限公司 | A kind of internal partition wall of sound-absorbing material filling |
| CN110229305A (en) * | 2019-06-27 | 2019-09-13 | 青岛爱尔家佳新材料股份有限公司 | A kind of explosion-proof polyurea materials and preparation method thereof |
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|---|---|---|---|---|
| CN106567583A (en) * | 2016-10-18 | 2017-04-19 | 同济大学 | Particle damper with multi-mechanism energy dissipation function |
| CN209686970U (en) * | 2019-03-14 | 2019-11-26 | 南京顶峰创智工程科技有限公司 | A kind of combined type wall to impede bullets |
Non-Patent Citations (1)
| Title |
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| 聚脲涂层复合结构抗侵彻机理实验研究;高照等;《高压物理学报》;20190430;第025102-1至025102-6页 * |
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