A penetration-resistant box-plate assembled double-layer wall structure and construction method

Abstract

The invention relates to an anti-penetration box-plate assembled double-layer wall structure and a construction method. The double-layer wall structure comprises: an outer wall, comprising a flat straight steel plate, a T-shaped stiffening rib and a prestressed steel strand, wherein a plurality of T-shaped stiffening ribs are evenly arranged on the inner side of the flat straight steel plate, and the web of the T-shaped stiffening ribs is vertically welded and fixed to the flat straight steel plate, a cavity is formed between two adjacent T-shaped stiffening ribs, and the prestressed steel strands are symmetrically arranged on both sides of the web of the T-shaped stiffening ribs close to the flat straight steel plate; an inner wall, which is a corrugated steel plate, arranged opposite to the outer wall, and wherein the corrugations extend outward along an oblique line direction at a predetermined angle to the height direction of the outer wall, and the wave crests of the corrugated steel plate are in close contact with the flange plates of the T-shaped stiffening ribs, and correspondingly provided with connecting holes; an anti-penetration structural layer, which is arranged in each cavity and detachably connected to the adjacent T-shaped stiffening ribs; a connecting device, which is installed on the flange plates of the T-shaped stiffening ribs and is suitable for fixing the inner and outer walls through the connecting holes. The double-layer wall structure of the present invention has excellent anti-penetration capability and can provide sufficient safety performance in wartime and other scenarios.

Description

Technical Field

[0001] The invention relates to the field of building structure engineering, in particular to a shelter building on a deep-sea island or reef, and specifically to an anti-penetration box-plate assembled double-layer wall structure and a construction method. Background Art

[0002] The box-panel prefabricated structure is a new type of structural system that can be assembled quickly. Its design concept is derived from the superstructure of the ship. In emergency situations where construction needs to be completed quickly, the box-panel prefabricated building structure can maximize its advantages such as light weight, convenient construction, high degree of standardization, and excellent seismic performance. In recent years, in the harsh environment of deep islands and reefs, prefabricated buildings have been valued for their rapid deployment and high adaptability. The deep island and reef environment requires the wall to be able to withstand high-strength shrapnel penetration and explosion impact to cope with various challenges.

[0003] Traditional prefabricated steel structure walls are usually single-layer structures with limited penetration resistance and are mainly designed for land environments. When facing long-term missions in special environments such as deep-sea islands and reefs, these ordinary prefabricated steel structure buildings often cannot meet higher safety and stability requirements. In addition, most of the existing deep-sea island and reef shelter walls are still mainly made of reinforced concrete materials. Although they have excellent explosion and penetration resistance, they also have economic and safety issues such as corrosion of reinforced concrete or cracking after being hit, difficulty in reinforcement, complex maintenance, and non-reusability.

[0004] Therefore, it is necessary to propose a new box-plate assembled wall structure which has strong explosion-proof and penetration-proof capabilities, can be quickly installed and can be reused. Summary of the invention

[0005] In view of the deficiencies in the prior art, the main purpose of the present invention is to provide an anti-penetration box panel assembled double-layer wall structure to solve the problem that the existing wall structure has poor explosion and penetration resistance and cannot be quickly installed and used.

[0006] The technical solution of the present invention is as follows:

[0007] An anti-penetration box-board assembled double-layer wall structure, comprising:

[0008] The outer wall comprises a flat straight steel plate, a T-shaped stiffening rib and a prestressed steel strand, wherein a plurality of the T-shaped stiffening ribs are evenly arranged on the inner side of the flat straight steel plate, and the webs thereof are vertically welded and fixed to the flat straight steel plate, a cavity is formed between two adjacent T-shaped stiffening ribs, and the prestressed steel strands are symmetrically arranged on both sides of the webs of the T-shaped stiffening ribs close to the flat straight steel plate, and are suitable for applying prestress to the outer wall by tensioning;

[0009] The inner wall is a corrugated steel plate, wherein the corrugations of the inner wall extend along an oblique line direction that forms a predetermined angle with the height direction of the outer wall, the crests of the corrugated steel plate are in close contact with the flange plate of the T-shaped stiffening rib, and corresponding connection holes are provided;

[0010] The anti-penetration structural layer is arranged between the outer wall and the inner wall, in the cavity formed by the adjacent T-shaped stiffening ribs, and is detachably connected and fixed to the adjacent T-shaped stiffening ribs;

[0011] The connecting device is installed on the flange plate of the T-shaped stiffening rib corresponding to the connecting hole, and is suitable for fixing the outer wall and the inner wall through the connecting hole.

[0012] Preferably, the outer wall further comprises L-shaped stiffening ribs, wherein the L-shaped stiffening ribs are arranged at equal intervals between two adjacent T-shaped stiffening ribs, and the webs of the L-shaped stiffening ribs are vertically welded and fixed to the flat straight steel plate.

[0013] Preferably, anchors are welded and fixed to the top and bottom of the flat straight steel plate corresponding to both sides of the T-shaped stiffening rib web, which are suitable for anchoring the two ends of the prestressed steel strand.

[0014] Preferably, the corrugation direction of the inner wall is 45° to the plane of the outer wall.

[0015] Preferably, the anti-penetration structural layer comprises:

[0016] A plurality of groups of anti-penetration structural plates, each group of the anti-penetration structural plates comprises at least one anti-penetration structural plate, both sides of each of the anti-penetration structural plates are provided with plug-in keys, and the webs of two adjacent T-shaped stiffening ribs are correspondingly provided with plug-in grooves suitable for inserting the plug-in keys to plug and fix the anti-penetration structural plates.

[0017] Preferably, each of the anti-penetration structural plates comprises:

[0018] Strip steel plate is a hollow steel plate;

[0019] The foam metal layer is filled in the hollow steel plate.

[0020] Preferably, the anti-penetration structural layer further comprises:

[0021] The bottom support plate is arranged at the bottom of the box-plate assembled double-layer wall structure, and the bottom support plate is welded and fixed to the bottom of at least a plurality of the T-shaped stiffening rib webs.

[0022] Preferably, the connecting device comprises:

[0023] A screw rod, one end of which is welded and fixed to the flange plate of the T-shaped stiffening rib, and the other end of which is suitable for passing through the connecting hole;

[0024] The nut is sleeved on the other end of the screw rod after it passes through the connecting hole, and is used to cooperate with the screw rod to tighten it.

[0025] Preferably, the connecting device further comprises:

[0026] The buckle cover is a strip-shaped block with a screw hole on it. The buckle cover is arranged between the nut and the corrugated steel plate by passing the screw through the screw hole, and the long side of the buckle cover is perpendicular to the corrugation direction of the corrugated steel plate;

[0027] The L-shaped elastic steel sheet is symmetrically arranged on the side of the buckle cover facing the corrugated steel plate. The web end of the L-shaped elastic steel sheet is rigidly connected to the buckle cover and is suitable for bending outward along the center of the buckle cover. The flange plate is arranged toward the side of the corrugated steel plate and is suitable for abutting against the corrugated steel plate.

[0028] The present invention also provides a construction method of the above-mentioned box-plate assembled double-layer wall structure, comprising the following steps:

[0029] S1: Prepare the outer wall: first make a flat straight steel plate, then evenly weld a plurality of T-shaped stiffening ribs on the flat straight steel plate, and finally symmetrically set prestressed steel strands on both sides of the connection between each T-shaped stiffening rib web and the flat straight steel plate;

[0030] S2: preparing the inner wall: preparing a corrugated steel plate having the same length and width as the outer wall, and the corrugations of the corrugated steel plate are arranged along an oblique direction at a predetermined angle to the height direction of the outer wall;

[0031] S3: preparing an anti-penetration structural layer between the inner and outer walls: making multiple sets of anti-penetration structural plates;

[0032] S4: preparing a connection device between the outer wall and the inner wall: firstly, welding a screw rod on the flange of the T-shaped stiffening rib of the outer wall, and then opening a connection hole at a position of the crest of the inner wall corresponding to the screw rod;

[0033] S5: At the construction site, first connect the inner wall to the outer wall by inserting the corresponding screws through the connecting holes, then detachably install multiple sets of anti-penetration structural plates between the outer wall and the inner wall, and finally install nuts along the screws on the outer side of the inner wall to fix the outer wall and the inner wall.

[0034] The beneficial effects of the present invention compared to the prior art are as follows: the present invention proposes a double-layer wall structure with anti-penetration box panels. The double-layer wall structure can simultaneously meet the needs of anti-penetration performance and the needs of rapid commissioning, and can be quickly repaired and maintain anti-penetration capability by replacing the anti-penetration structural layer, and can also play a good role in resisting explosives and protecting the interior during wartime. Specifically, it has at least the following practical effects:

[0035] In the present invention, prestressed steel strands are arranged on both sides of the connection between the web of the T-shaped stiffening rib welded on the inner side of the outer wall and the outer wall. By tensioning the prestressed steel strands to apply prestressing force to the outer wall, the outer wall can be deformed and warped toward the outer surface (explosion-facing surface) to increase its outer surface bearing limit capacity, thereby enhancing the outer wall's anti-penetration ability.

[0036] In the present invention, the corrugations of the inner wall extend outward along the oblique direction at a predetermined angle to the height direction of the outer wall, and the corrugated structure can effectively disperse and guide the vertical penetration force, decompose it into multi-directional stress, and make the impact force spread along the direction of the corrugation to reduce local damage. In addition, the corrugation and the outer wall are inclined at an angle to help resist the tangential sliding or direct penetration of the penetrator, making the penetration route complicated, increasing the difficulty of penetration, and providing better compressive and shear strength.

[0037] In the present invention, the anti-penetration structural layer is detachably connected and fixed to the webs of two adjacent T-shaped stiffening ribs. The detachable connection makes the installation and disassembly process of the anti-penetration structural layer more convenient. After the wall is hit, the anti-penetration structural plate can be replaced in time to quickly restore a certain anti-penetration ability of the wall.

[0038] In the present invention, when the foam metal layer of each anti-penetration structural plate is subjected to impact, its pore structure can be gradually compressed, thereby absorbing the impact force and avoiding damage or penetration. For explosion waves, the foam metal can absorb the shock wave energy by compressing the pores, reducing the impact of the explosion on subsequent structures.

[0039] In the present invention, each component of the double-layer wall structure is prepared in a standardized manner, transported to the site, and quickly connected and installed, thereby meeting the need for rapid commissioning.

[0040] It should be understood that the contents described in the Summary of the Invention section are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easy to understand through the following description. In addition, the implementation of any embodiment of the present invention does not mean that multiple or all of the above-mentioned beneficial effects must be possessed or achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0042] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0043] Figure 1 Schematic diagram of a box-board assembled double-layer wall structure according to some embodiments of the present invention;

[0044] Figure 2 Schematic diagram of the overall structure of the outer wall of some embodiments of the present invention;

[0045] Figure 3 A top view of an outer wall of some embodiments of the present invention;

[0046] Figure 4 Schematic diagram of the overall structure of the inner wall of some embodiments of the present invention;

[0047] Figure 5 Schematic diagram of screw installation of a connecting device according to some embodiments of the present invention;

[0048] Figure 6 It is a schematic diagram of the overall structure of the connecting device of some embodiments of the present invention;

[0049] Figure 7 It is a schematic diagram of the installation of the anti-penetration structural plate of some embodiments of the present invention;

[0050] Figure 8 A schematic diagram of the structure of a plug-in slot in some embodiments of the present invention;

[0051] Fig. 9 It is a schematic diagram of the overall installation of the bottom support plate of some embodiments of the present invention;

[0052] Fig.10 Schematic diagram of the local structure of the bottom support plate of some embodiments of the present invention.

[0053] Markings in the figure:

[0054] 1-outer wall; 101-flat straight steel plate; 102-T-type stiffening rib; 103-prestressed steel strand; 104-L-type stiffening rib;

[0055] 2-inner wall; 201-corrugated steel plate; 202-connection hole;

[0056] 3-connecting device; 301-screw; 302-nut; 303-buckle cover; 304-L-shaped elastic steel sheet;

[0057] 4-anti-penetration structural plate; 5-bottom support plate; 6-cavity; 7-plug key; 8-plug slot; 9-anchor; 10-L-shaped member; 11-T-shaped member.

[0058] The same or corresponding symbols in the drawings indicate the same or corresponding parts. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with the embodiments and drawings. Here, the illustrative embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] It should be understood that the terms "include / comprise", "consist of..." or any other variations are intended to cover non-exclusive inclusion, so that a product, device, process or method that includes a series of elements includes not only those elements, but also may include other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of more restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method that includes the elements.

[0062] It is also necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device, component or structure must have a specific direction, be constructed or operate in a specific direction, and should not be understood as a limitation on the present invention.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0064] The implementation of the present invention is described in detail below in conjunction with preferred embodiments.

[0065] like Figures 1 to 10 As shown, the present invention proposes a double-layer wall structure with box panels assembled to resist penetration. The double-layer wall structure is suitable for deep-sea islands and reefs, and can provide sufficient safety performance in wartime and other scenarios. In the present invention, the anti-penetration performance refers to the ability of the wall structure to resist being penetrated and damaged when subjected to high-speed projectiles or explosion impacts.

[0066] See also Figure 1 The box-plate assembled double-layer wall structure is composed of an outer wall 1, an inner wall 2 and a connection device 3 for an anti-penetration structural layer in a certain assembly manner.

[0067] See also Figure 2 , Figure 3 The outer wall 1 includes a flat straight steel plate 101, a T-shaped stiffening rib 102 and a prestressed steel strand 103. The flat straight steel plate 101 is made of high-strength steel. High-strength steel has extremely high tensile strength and yield strength, which enables the wall to maintain good stability and integrity when subjected to a large load.

[0068] There are multiple T-shaped stiffening ribs 102, and the multiple T-shaped stiffening ribs 102 are evenly spaced and arranged on the inner side (inner surface) of the flat straight steel plate 101. The multiple T-shaped stiffening ribs 102 are welded and fixed vertically to the inner surface of the flat straight steel plate 101 by using their webs. The T-shaped stiffening ribs 102 can increase the shear strength and bending rigidity of the outer wall 1, thereby improving the overall stability of the wall.

[0069] It is easy to understand that the arrangement and number of the T-shaped stiffening ribs 102 are usually determined according to the size, load and deformation requirements of the outer wall 1, and the present invention does not limit this.

[0070] There are multiple prestressed steel strands 103, each two in a group, and each group is symmetrically arranged on both sides of the connection between the web of each T-shaped stiffening rib 102 and the flat straight steel plate 101. That is, the web of the T-shaped stiffening rib 102 is close to both sides of the flat straight steel plate 101. It is suitable for applying prestress to the outer wall 1 by tensioning the prestressed steel strands 103.

[0071] In the present invention, the direction of the prestressing is parallel to the web of the T-shaped stiffening rib 102. By applying prestress to the outer wall 1 by tensioning, the outer wall 1 can be deformed and warped toward the outer surface (explosion-facing surface) to increase its outer surface bearing limit capacity, thereby enhancing the outer wall 1's ability to resist penetration.

[0072] In some embodiments, see Figures 1 to 3 as well as Figure 7 , Fig. 9, an anchor 9 is welded and fixed on both sides of the web of each T-shaped stiffening rib 102 at the top and bottom of the plane straight steel plate 101. After the tensioning is completed, the two ends of the prestressed steel strand 103 are anchored in the anchor 9.

[0073] The anchor 9 is usually made of high-strength steel and has sufficient bearing capacity and durability. The anchoring method can be mechanical anchoring (such as a wedge anchor) or bonding anchoring (such as using an adhesive such as epoxy resin).

[0074] It is easy to understand that during the tensioning process, the prestressed steel strand 103 is stretched to a predetermined prestressing level and then locked by the anchor 9 to keep it in a tensioned state. In this way, the prestressed steel strand 103 can provide additional tension to the outer wall 1, enhance the bearing capacity of the wall, and provide the outer wall 1 with tension parallel to the wall surface.

[0075] In the present invention, the anchor 9 can be welded and fixed only to the flat straight steel plate 101 , or can be welded and fixed to the flat straight steel plate 101 and the web of the T-shaped stiffening rib 102 at the same time.

[0076] In some embodiments, see Figures 1 to 3 The outer wall panel 1 further includes L-shaped stiffening ribs 104. The L-shaped stiffening ribs 104 are arranged at equal intervals between two adjacent T-shaped stiffening ribs 102. For example, one, two or more L-shaped stiffening ribs 104 are arranged at equal intervals between two adjacent T-shaped stiffening ribs 102. The web of the L-shaped stiffening rib 104 is vertically welded and fixed to the flat straight steel plate 101. The flange plates of the multiple L-shaped stiffening ribs 104 are arranged toward the same side.

[0077] In the present invention, the T-shaped stiffening rib 102 is named because its shape is similar to the letter "T", and its design generally includes a vertical web and a horizontal flange. This design enables the T-shaped stiffening rib 102 to more effectively form a firm connection with the flat straight steel plate 101, thereby enhancing the overall stability of the flat straight steel plate 101. The L-shaped stiffening rib 104 presents a right-angle shape, similar to the letter "L". Although the L-shaped stiffening rib 104 can also provide a certain support effect, it may be slightly inferior to the T-shaped stiffening rib 102 in terms of connection strength and overall stability. Therefore, the T-shaped stiffening rib 102 plays an important role in the anti-penetration performance of the outer wall 1. Furthermore, for walls with higher requirements for anti-penetration capabilities, the size of the T-shaped stiffening rib 102 is larger, and in the arrangement of the T-shaped stiffening rib 102 and the L-shaped stiffening rib 104, the number of the T-shaped stiffening rib 102 is greater and the arrangement density is higher.

[0078] In the present invention, the number of L-shaped stiffening ribs 104 provided between two adjacent T-shaped stiffening ribs 102 is determined according to the size of the wallboard and the required structural strength, and the present invention does not limit this. The present invention can reduce unnecessary material usage while ensuring structural strength by providing T-shaped stiffening ribs 102 and L-shaped stiffening ribs 104 at reasonable intervals. This method of optimizing material usage helps reduce costs and improve economic benefits.

[0079] The present invention will take the example of arranging two L-shaped stiffening ribs 104 at equal intervals between two adjacent T-shaped stiffening ribs 102 to explain other structural components.

[0080] See also Figure 1 , Figure 4 The inner wall 2 is a corrugated steel plate 201. The corrugated steel plate 201 is a low yield point steel plate. The low yield point steel plate has high ductility and toughness, and can maintain good mechanical properties within a large deformation range. This property enables the corrugated steel plate 201 to effectively absorb energy when bearing loads, further improving the explosion resistance of the wall.

[0081] In some embodiments, the corrugated steel plate 201 is a rounded corrugated steel plate. A rounded corrugated steel plate is a structural steel plate with a rounded corner corrugated shape that is formed by pressing a steel plate of a certain thickness through a specific processing technology. The rounded corners help reduce stress concentration and make the steel plate more uniform when subjected to stress, thereby improving its load-bearing capacity and durability.

[0082] The inner wall 2 is arranged opposite to the outer wall 1 , and the corrugations of the inner wall 2 extend along an oblique direction that forms a predetermined angle with the height direction or the length direction of the outer wall 1 .

[0083] In the present invention, the corrugations of the corrugated steel plate 201 do not simply extend along the height direction (vertical direction) or the length direction (horizontal direction) of the outer wall 1, but are extended outward along the oblique direction at a predetermined angle to these directions. In this way, the corrugated structure can be used to effectively disperse and guide the vertical penetration force, decompose it into multi-directional stresses, and make the impact force spread along the direction of the corrugation to reduce local damage. In addition, the oblique angle between the corrugation and the outer wall 1 helps to resist the tangential sliding or direct penetration of the penetrating object, making the penetration route complicated, increasing the difficulty of penetration, and providing better compressive and shear strength.

[0084] In some embodiments, the corrugations of the inner wall 2 extend outward along an inclined direction that is 45 degrees to the height direction and the length direction of the outer wall 1. That is, the corrugation direction of the inner wall 2 is 45 degrees to the plane formed by the length and width of the outer wall 1. 45 degrees can effectively balance and disperse the loads from the X-axis (length direction) and the Y-axis (height direction), ensuring that the overall force of the double-layer wall structure is more balanced.

[0085] Continue to see Figure 1 , Figure 4 The crest of the corrugated steel plate 201 is closely attached to the outer surface of the flange plate of the T-shaped stiffening rib 102. The flange plate of the T-shaped stiffening rib 102 provides additional support for the corrugated steel plate 201, thereby enhancing the shear resistance of the wall. Under the action of shear load, this design can more effectively disperse and resist shear force and maintain the stability of the wall.

[0086] The corrugated steel plate 201 is provided with a connection hole 202, and the connection hole 202 is located at the joint between the inner wall 2 and the outer wall 1. That is, the corrugated steel plate 201 and the flange plate of the T-shaped stiffening rib 102 are in close contact.

[0087] See also Figure 1 The connection device 3 is installed on the flange plate of the T-shaped stiffening rib 102 at a position corresponding to the connection hole 202, and is suitable for fixing the outer wall 1 and the inner wall 2 through the connection hole 202.

[0088] See also Figure 5 , Figure 6 The connecting device 3 includes a screw rod 301 and a nut 302. One end of the screw rod 301 is welded to the center line of the flange plate of the T-shaped stiffening rib 102 of the outer wall 1, and the other end is suitable for passing through the connecting hole 202 and fixed by the nut 302.

[0089] In the present invention, the size of the connecting hole 202 is slightly larger than the size of the screw rod 301 .

[0090] In some embodiments, see Figure 6 , the connection device 3 also includes a buckle cover 303 and an L-shaped elastic steel sheet 304. The buckle cover 303 is a strip-shaped block, which is arranged between the nut 302 and the corrugated steel plate 201, and its long side is perpendicular to the corrugation direction of the corrugated steel plate 201. That is, it is parallel to the corrugation propagation direction of the corrugated steel plate 201. A screw hole (not shown in the figure) is opened in the middle of the buckle cover 303, and the size of the screw hole is slightly larger than the size of the screw 301. The buckle cover 303 is arranged on the screw 301 through the screw hole along the inner side of the nut 302. There are two L-shaped elastic steel sheets 304, and the two L-shaped elastic steel sheets 304 are symmetrically arranged along the two short sides of the buckle cover 303 facing the corrugated steel plate 201. The web ends of the two L-shaped elastic steel sheets 304 are rigidly connected to the buckle cover 303, and the flange plates of the two L-shaped elastic steel sheets 304 are arranged toward the side of the corrugated steel plate 201. The webs of the two L-shaped elastic steel sheets 304 are adapted to bend outward along the center of the buckle cover when the nut 302 is tightened, until the flange plate abuts against the wave crest of the corrugated steel plate 201 .

[0091] In the present invention, the application of the L-shaped elastic steel sheet 304 significantly enhances the connection performance between the inner and outer steel plates and the uniformity of force transmission of the entire wall panel. The L-shaped elastic steel sheet 304 can make the inner and outer steel plates fit more closely at each connection, ensuring more uniform force transmission when the wall is hit, avoiding the possibility of some connections where the inner and outer wall panels do not fit closely and force transmission is not in place due to size manufacturing errors or installation errors, thereby reducing the possibility of local stress concentration.

[0092] In some embodiments, the strip-shaped block is a rounded rectangular parallelepiped with considerable thickness.

[0093] It should be understood that the cross-sectional shape of the L-shaped elastic steel sheet 304 is not a strictly geometric L-shape, but an approximate L-shaped feature. That is, the web and flange of the L-shaped elastic steel sheet 304 are not strictly perpendicular to each other, and the clamp between the web and flange may be an acute angle. This approximate L-shaped design is intended to meet the flexibility and adaptability requirements in practical applications, ensure that the L-shaped elastic steel sheet 304 can effectively fit the corrugated steel sheet 201, and provide the necessary elasticity and thrust to the corrugated steel sheet when the nut 302 is tightened.

[0094] It is easy to understand that the rigid connection here can be a welding connection or a hot melt connection.

[0095] In the present invention, after the inner and outer wall bodies are connected by the screw 301 of the connecting device 3, the buckle cover 303 of the connecting device 3 is inserted into the screw 301 through the screw hole on the buckle cover 303, and the long side of the buckle cover 303 is parallel to the corrugation propagation direction of the corrugated steel plate 201, and the nut 302 is installed on the screw 301 outside the buckle cover 303, and the web of the L-shaped elastic steel sheet 304 of the connecting device 3 is bent outward along the center of the buckle cover 303 by tightening the nut 302 until the flange plate of the L-shaped elastic steel sheet 304 abuts against the crest of the corrugated steel plate 201.

[0096] It is easy to understand that since the web of the L-shaped elastic steel sheet 304 should be against the corrugations, an appropriate angle of the elastic steel sheet should be set.

[0097] In the present invention, for different size requirements of the double-layer wall structure, the inner wall 2 and the outer wall 1 can be arranged alternately and connected corresponding to the connection holes 202 to extend the overall length of the wall, thereby meeting different size requirements.

[0098] In some embodiments, see Figure 1, a cavity 6 is formed between adjacent T-shaped stiffening ribs 102 and L-shaped stiffening ribs 104 and between two adjacent L-shaped stiffening ribs 104. An anti-penetration structural layer is arranged in each cavity 6, and the anti-penetration structural layer is detachably connected and fixed to the webs of adjacent T-shaped stiffening ribs 102 and L-shaped stiffening ribs 104 and between two adjacent L-shaped stiffening ribs 104. The detachable connection makes the installation and removal process of the anti-penetration structural layer more convenient. After the wall is hit, the anti-penetration structural plate can be replaced in time to quickly restore a certain anti-penetration ability of the wall.

[0099] See also Figure 7 , Figure 8 The anti-penetration structural layer includes a plurality of groups of anti-penetration structural plates 4 , and each group of anti-penetration structural plates 4 is arranged in the cavity 6 formed between adjacent T-shaped stiffening ribs 102 and L-shaped stiffening ribs 104 and between two adjacent L-shaped stiffening ribs 104 .

[0100] It is easy to understand that in some embodiments, if only T-shaped stiffening ribs 102 are provided on the plane straight steel plate 101, the cavity 6 is formed between two adjacent T-shaped stiffening ribs 102 among the plurality of T-shaped stiffening ribs 102 and the plane straight steel plate 101. The anti-penetration structural layer is detachably connected and fixed to the webs of the two adjacent T-shaped stiffening ribs 102. Similarly, each group of anti-penetration structural plates 4 is arranged in the cavity 6 formed by two adjacent T-shaped stiffening ribs 102.

[0101] In some embodiments, see Figure 7 , Figure 8 Each group of anti-penetration structural plates 4 includes three anti-penetration structural plates 4, and the three anti-penetration structural plates 4 are arranged side by side along the length direction of the web of the T-shaped stiffening rib 102. Both sides of each anti-penetration structural plate 4 are provided with plug-in keys 7, and the webs of adjacent T-shaped stiffening ribs 102 and L-shaped stiffening ribs 104 and adjacent two L-shaped stiffening ribs 104 are provided with corresponding plug-in grooves 8, and the shape of the plug-in grooves 8 is adapted to the plug-in keys 7, so that the three anti-penetration structural plates 4 can be inserted into the corresponding plug-in grooves 8 by using the plug-in keys 7 for plugging and fixing.

[0102] In the present invention, the size of the plug key 7 should be designed to be smaller than the size of the plug slot 8 to prevent the slot from being partially deformed and the anti-penetration structural plate 4 from being difficult to remove and replace after the wall is impacted by shrapnel or explosion.

[0103] It is easy to understand that each group of anti-penetration structural plates 4 includes but is not limited to three anti-penetration structural plates 4, and can also be one, two or more anti-penetration structural plates 4, which can be flexibly adjusted according to the thickness of the anti-penetration structural plates 4 and the length of the web of the T-shaped stiffening rib 102.

[0104] Continue to see Figure 7 , Figure 8Two L-shaped members 10 and two T-shaped members 11 are symmetrically arranged on the web of the T-shaped stiffening rib 102 and the L-shaped stiffening rib 104 facing the cavity 6. The two L-shaped members 10 are arranged on the outermost side, and the webs of the two L-shaped members 10 are vertically welded and fixed to the webs of the T-shaped stiffening rib 102. The flange plates are all arranged inwardly, and the two T-shaped members 11 are arranged between the two L-shaped members 10. The webs of the two T-shaped members 11 are vertically welded and fixed to the webs of the T-shaped stiffening rib 102 to form the above-mentioned plug-in groove 8 between the L-shaped members 10 and the T-shaped members 11 and between two adjacent T-shaped members 11.

[0105] In a specific embodiment, the plug key 7 is a T-shaped piece extending outwardly from both sides of the anti-penetration structural plate 4. The plug slot 8 is a rectangular slot, and the rectangular slot has an opening on one side facing the anti-penetration structural plate 4 to ensure that the T-shaped piece can be inserted into the rectangular slot from the opening.

[0106] In some embodiments, the anti-penetration structural plate 4 includes a strip steel plate and a foam metal layer. The strip steel plate is a hollow steel plate, the length of which is the spacing of the prestressed steel strands 103 vertically applied to the outer wall 1, the width is the spacing of adjacent stiffening ribs, and the thickness is determined by the spacing and number of the plug-in slots 8. The foam metal layer is filled in the hollow steel plate.

[0107] The foam metal layer is a porous material with high porosity, made of metal through gas foaming and sintering, which has both the strength of metal and the lightness of porous materials. The foam metal layer can deform when impacted through its porous structure, absorb a large amount of kinetic energy, and avoid damage or penetration.

[0108] The present invention sets multiple layers of anti-penetration structural plates 4 with a certain thickness and a foam metal layer in parallel to the wall in the cavity 6. When facing impact, explosion wave and shrapnel attack, the foam metal layer in the anti-penetration structural plate 4 can absorb the impact force and shock wave energy by compressing its pore structure, thereby reducing the impact of the explosion on the subsequent structure. In addition, the specific type of foam metal has good corrosion resistance and low thermal expansion coefficient, which is suitable for the high heat and high impact environment generated by the explosion.

[0109] Continue to see Fig. 9 , Fig.10 The anti-penetration structural layer also includes a bottom support plate 5. The bottom support plate 5 is arranged at the bottom of the box plate assembled double-layer wall structure, and the bottom support plate 5 is at least welded and fixed to the bottom of the web of multiple T-shaped stiffening ribs 102 to support the anti-penetration structural plate 4.

[0110] In some embodiments, in order to enhance the stability of the bottom supporting plate 5 , the bottom supporting plate 5 may be further welded and fixed to the bottom of the web of the L-shaped stiffening rib 104 and / or the bottom of the insertion groove 8 .

[0111] In some embodiments, the bottom support plate 5 is a flat steel plate.

[0112] The present invention also provides a construction method of the above-mentioned box-plate assembled double-layer wall structure, comprising the following steps:

[0113] S1: Preparation of outer wall;

[0114] This step specifically includes: firstly making a high-strength steel flat straight steel plate with uniform thickness, then welding T-shaped stiffening ribs of corresponding arrangement at equal intervals on the flat straight steel plate, and finally symmetrically arranging prestressed steel strands on both sides of the connection between the web of the T-shaped stiffening rib and the flat straight steel plate;

[0115] S2: Preparation of inner wall;

[0116] This step specifically includes: making a rounded corrugated steel plate with the same length and width as the outer wall, wherein the rounded corrugated steel plate is made of low yield point steel, and the "corrugation propagation direction" of the rounded corrugated steel plate is 45 degrees to the plane formed by the length and width of the outer wall;

[0117] S3: preparing an anti-penetration structural layer between the inner and outer walls;

[0118] This step specifically includes: preparing foam metal, a plug-in slot, an anti-penetration structural plate with a plug-in key and a bottom support plate of corresponding thickness according to the requirements of the anti-penetration capability, wherein the foam metal is adapted to the size of the anti-penetration structural plate, and the plug-in slot is welded to the web side of the T-shaped stiffening rib in a certain arrangement;

[0119] S4: preparing a connection device between the outer wall and the inner wall;

[0120] This step specifically includes:

[0121] S401: Screws and connection holes are provided at the connection between the outer wall and the inner wall: first, a screw of a connection device is welded at the connection on the center axis of the flange of the T-shaped stiffening rib of the outer wall, and then a connection hole is opened at the connection of the inner wall;

[0122] S402: prepare the remaining components of the connection device, including a nut, an L-shaped elastic steel sheet and a buckle cover: the nut is matched with the screw rod in size, the buckle cover is generally a rectangular parallelepiped made of rigid material, and the buckle cover is rigidly connected to the web of the L-shaped elastic steel sheet at both sides facing the wall; a hole is opened in the center of the buckle cover, and the size of the hole is slightly larger than the size of the screw rod; the elastic steel sheet is bent outward along the center of the buckle cover to ensure that the flange of the elastic steel sheet can resist the inner wall after connection;

[0123] S5: Transport the processed and prepared outer wall, inner wall, anti-penetration structural layer and connection device components to the site in the corresponding quantity according to the site requirements for assembly. Specifically including:

[0124] S501: rigidly constraining a long side of the outer wall at the installation site, and fixing multiple outer walls to be assembled according to the required wall size, so as to keep the outer walls in the same plane;

[0125] S502: connecting the inner wall to the outer wall through the connection hole;

[0126] In this step, one outer wall may be connected to one inner wall in a one-to-one manner according to the required double-layer wall structure size, or multiple outer walls may be arranged side by side, with one inner wall connected to each connection point of two outer walls, or multiple outer walls may be arranged along the length and height direction, with one inner wall connected to each corner of four outer walls, so as to form double-layer wall structures with different size requirements;

[0127] S503: After the corresponding connection of the inner and outer walls is completed, the anti-penetration structural plate is inserted along the plug-in slot to complete the assembly of the anti-penetration structural layer. The buckle cover with the L-shaped elastic steel sheet in the connection device is inserted into the screw through the screw hole in the center of the buckle cover with the flange of the L-shaped elastic steel sheet facing the inner wall. Finally, the nut is screwed onto the screw to initially connect and fix it. Then, the nut is further tightened with a pneumatic gun of a suitable size or other nut tightening equipment to keep the L-shaped elastic steel sheet of the connection device in a certain compression state. After all the connection devices are assembled, the overall construction of the double-layer wall structure is completed.

[0128] In the present invention, each component should be prepared in a standardized manner. Standardized preparation can ensure that when the outer wall and the inner wall are not connected one-to-one but connected in a staggered arrangement to meet different wall sizes, there will be no problems such as mismatched connection holes and mismatched sizes, thereby ensuring high efficiency and flexibility during on-site assembly.

[0129] The double-layer wall structure of the present invention has simple assembling parts and few types. All components are prefabricated in the factory, which is simple to assemble and disassemble and convenient to transport. Only simple threaded connections are required at the construction site, which is convenient for standardized preparation and management, and ensures assembly efficiency and construction quality.

[0130] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0131] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A penetration-resistant box-board assembled double-layer wall structure, characterized in that: include: The outer wall comprises a flat straight steel plate, a T-shaped stiffening rib and a prestressed steel strand, wherein a plurality of the T-shaped stiffening ribs are evenly arranged on the inner side of the flat straight steel plate, and the webs thereof are vertically welded and fixed to the flat straight steel plate, a cavity is formed between two adjacent T-shaped stiffening ribs, and the prestressed steel strands are symmetrically arranged on both sides of the webs of the T-shaped stiffening ribs close to the flat straight steel plate, and are suitable for applying prestress to the outer wall by tensioning; The inner wall is a low yield point corrugated steel plate, the corrugations of the inner wall are extended along an oblique direction at a predetermined angle to the height direction of the outer wall, the crests of the corrugated steel plate are in close contact with the flange plate of the T-shaped stiffening rib, and corresponding connection holes are provided; The anti-penetration structural layer is arranged between the outer wall and the inner wall, in the cavity formed by the adjacent T-shaped stiffening ribs, and is detachably connected and fixed to the adjacent T-shaped stiffening ribs; A connecting device, mounted on the flange plate of the T-shaped stiffening rib corresponding to the connecting hole, suitable for fixing the outer wall and the inner wall through the connecting hole; in The anti-penetration structural layer includes: multiple groups of anti-penetration structural plates, each group of the anti-penetration structural plates includes at least one anti-penetration structural plate, each of the anti-penetration structural plates is provided with plug-in keys on both sides, and the webs of two adjacent T-shaped stiffening ribs are correspondingly provided with plug-in grooves suitable for inserting the plug-in keys to plug and fix the anti-penetration structural plates.

2. The box panel assembled double-layer wall structure according to claim 1 is characterized in that: The outer wall also includes L-shaped stiffening ribs, which are arranged at equal intervals between two adjacent T-shaped stiffening ribs, and the webs of the L-shaped stiffening ribs are vertically welded and fixed to the flat straight steel plates.

3. The box panel assembled double-layer wall structure according to claim 1 is characterized in that: Anchors are welded and fixed to the top and bottom of the flat straight steel plate corresponding to both sides of the T-shaped stiffening rib web, which are suitable for anchoring the two ends of the prestressed steel strand.

4. The box panel assembled double-layer wall structure according to claim 1 is characterized in that: The corrugation direction of the inner wall is 45 degrees to the plane of the outer wall.

5. The box panel assembled double-layer wall structure according to claim 1 is characterized in that: Each of the anti-penetration structural plates comprises: Strip steel plate is a hollow steel plate; The foam metal layer is filled in the hollow steel plate.

6. The box panel assembled double-layer wall structure according to claim 1 is characterized in that: The anti-penetration structural layer also includes: The bottom support plate is arranged at the bottom of the box-plate assembled double-layer wall structure, and the bottom support plate is welded and fixed to the bottom of at least a plurality of the T-shaped stiffening rib webs.

7. The box panel assembled double-layer wall structure according to claim 1 is characterized in that: The connecting device comprises: A screw rod, one end of which is welded and fixed to the flange plate of the T-shaped stiffening rib, and the other end of which is suitable for passing through the connecting hole; The nut is sleeved on the other end of the screw rod after it passes through the connecting hole, and is used to cooperate with the screw rod to tighten it.

8. The box panel assembled double-layer wall structure according to claim 7 is characterized in that: The connecting device also includes: The buckle cover is a strip-shaped block with a screw hole on it. The buckle cover is arranged between the nut and the corrugated steel plate by passing the screw through the screw hole, and the long side of the buckle cover is perpendicular to the corrugation direction of the corrugated steel plate; The L-shaped elastic steel sheet is symmetrically arranged on the side of the buckle cover facing the corrugated steel plate. The web end of the L-shaped elastic steel sheet is rigidly connected to the buckle cover and is suitable for bending outward along the center of the buckle cover. The flange plate is arranged toward the side of the corrugated steel plate and is suitable for abutting against the corrugated steel plate.

9. A construction method for a box-plate assembled double-layer wall structure according to any one of claims 1 to 8, characterized in that: The steps include: S1: Prepare the outer wall: first make a flat straight steel plate, then evenly weld a plurality of T-shaped stiffening ribs on the flat straight steel plate, and finally symmetrically set prestressed steel strands on both sides of the connection between each T-shaped stiffening rib web and the flat straight steel plate; S2: preparing the inner wall: preparing a corrugated steel plate having the same length and width as the outer wall, and the corrugations of the corrugated steel plate are arranged along an oblique direction at a predetermined angle to the height direction of the outer wall; S3: preparing an anti-penetration structural layer between the inner and outer walls: making multiple sets of anti-penetration structural plates; S4: preparing a connection device between the outer wall and the inner wall: firstly, welding a screw rod on the flange of the T-shaped stiffening rib of the outer wall, and then opening a connection hole at a position of the crest of the inner wall corresponding to the screw rod; S5: At the construction site, first connect the inner wall to the outer wall by inserting the corresponding screws through the connecting holes, then detachably install multiple sets of anti-penetration structural plates between the outer wall and the inner wall, and finally install nuts along the screws on the outer side of the inner wall to fix the outer wall and the inner wall.

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