Fabricated composite structure anti-explosion protection fortification and assembling method thereof

Abstract

The invention belongs to the technical field of protection fortification, and particularly discloses an assembly type composite structure anti-explosion protection fortification and an assembly method thereof.The protection fortification comprises a bottom plate, vertical protection wallboards and arched protection wallboards; a sliding groove is formed in the upper surface of the bottom plate. The upright protective wall plate comprises an upright protective wall plate body clamped with the bottom plate through the sliding chute, and a first connecting piece arranged at the upper end of the upright protective wall plate body; the arched protective wall plate is clamped with the upright protective wall plate through the first connecting piece; wherein the upright protective wallboard body comprises a plane steel plate, a first rubber concrete layer, a first corrugated steel plate, a second rubber concrete layer, a second corrugated steel plate, a rubber filling layer, a foam concrete layer, a third corrugated steel plate, a UHPC layer and a fourth corrugated steel plate which are fixedly connected in sequence, and the wave impedance of each layer of material is in gradient change. And the high-wave impedance material and the low-wave impedance material are alternately arranged to realize effective explosion resistance.

Description

Technical Field

[0001] This invention belongs to the field of protective fortification technology, and more specifically, relates to a prefabricated composite structure explosion-proof protective fortification and its assembly method. Background Technology

[0002] With the increasing severity of non-traditional security threats, critical facilities (such as command posts, ammunition depots, and chemical plants) are facing higher demands for efficient, flexible, and reliable protection systems. Against this backdrop, blast-resistant structures, as a key physical protection measure, have become a focus of current engineering research due to their rapid deployment capabilities and comprehensive protective performance.

[0003] To address these challenges, extensive research has been conducted both domestically and internationally in recent years, and the application of prefabricated blast-resistant structures has been gradually promoted. These structures are assembled on-site using prefabricated components, significantly improving construction efficiency and flexibility, and overcoming the problems of long construction cycles and poor adaptability associated with traditional cast-in-place structures. For example, some existing technologies use bolted connections or welding to splice prefabricated concrete slabs, steel beams, and other components into a unified structure to achieve modular construction. In addition, some studies have explored the introduction of lightweight, high-strength materials (such as ultra-high performance concrete and fiber-reinforced composite materials) to enhance the blast resistance of structures with limited thickness. These technical solutions have, to some extent, improved the assembly efficiency and local impact resistance of structures, initially meeting the deployment needs in some emergency scenarios.

[0004] However, despite the progress made in existing technologies, many limitations remain in practical applications, making it difficult to fully meet modern protection needs. For example, existing prefabricated structures mostly rely on threaded connections or welding to fix components. The former requires high assembly precision, is cumbersome to install, and is prone to loosening under vibration or impact, while the latter requires on-site welding equipment, limiting construction conditions and affecting assembly speed and quality stability. Secondly, existing technologies mostly rely on single materials to construct blast-resistant systems, such as reinforced concrete or steel structures. Although each has its advantages, they all suffer from insufficient energy absorption capacity and poor ductility, making them prone to brittle failure under high-intensity explosive loads, leading to overall structural failure. In addition, existing structural systems lack research on the synergistic mechanism of multi-materials, failing to fully utilize the complementary advantages of composite materials in blast-resistant performance. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a prefabricated composite structure explosion-proof protective fortification and its assembly method. By using the upright protective wall panel as the core protective layer, the wave impedance gradient design of its multi-layer composite structure can be used to control the stress wave propagation path. Combined with the alternating arrangement of high wave impedance materials and low wave impedance materials, the energy of the shock wave is gradually attenuated, thereby reducing the structural weight while effectively meeting the explosion-proof performance requirements.

[0006] To achieve the above objectives, the present invention provides a prefabricated composite structure explosion-proof protective structure, comprising: a base plate, a vertical protective wall panel, and an arched protective wall panel; The upper surface of the base plate is provided with a sliding groove; The upright protective wall panel includes: an upright protective wall panel body that is engaged with the base plate via the sliding groove, and a first connecting member disposed at the upper end of the upright protective wall panel body; The arched protective wall panel is snapped into the upright protective wall panel by the first connector. The upright protective wall panel body includes a planar steel plate, a first rubber concrete layer, a first corrugated steel plate, a second rubber concrete layer, a second corrugated steel plate, a rubber filling layer, a foam concrete layer, a third corrugated steel plate, a UHPC layer, and a fourth corrugated steel plate that are fixedly connected in sequence, and the wave impedance of each layer of material varies in a gradient.

[0007] Furthermore, the first connector is an H-shaped steel plate, and its web upper end is provided with a plurality of connecting through holes and limiting tubes at equal intervals; The first connector is fixedly connected to the upright protective wall panel body through the connecting through hole and the fastening connector, and is detachably connected to the arched protective wall panel through the limiting tube.

[0008] Furthermore, the upright protective wall panel body is divided into three sections along its width direction. The first section includes a flat steel plate, a first rubber concrete layer, a first corrugated steel plate, and a portion of the second rubber concrete layer bonded to it. The second section includes the remaining second rubber concrete layer connected to the first section, the second corrugated steel plate, and a rubber filler layer. The third section includes a foam concrete layer, a third corrugated steel plate, a UHPC layer, and a fourth corrugated steel plate. The first segment and the second segment are offset along the length of the upright protective wall panel body in the second rubber concrete layer and are provided with positioning bosses and positioning grooves. The positioning bosses and the positioning grooves are engaged and connected in a detachable manner through positioning holes and positioning pins. The upper surfaces of the first segment, the second segment, and the third segment are flush. The first segment and the second segment have the same length and are longer than the third segment, and the difference between them is the same as the depth of the groove. The bottom ends of the first segment and the second segment fall into the groove, and the third segment abuts against the upper surface of the base plate.

[0009] Furthermore, the arched protective wall panel includes: an arched protective side panel, an arched protective top panel, and a third connector; the arched protective side panel is detachably connected to the first connector; the arched protective top panel is detachably connected to the two arched protective side panels on both sides of it through the third connector.

[0010] Furthermore, the arched protective side plate includes: an arched protective side plate body, a third lifting point, a fourth lifting point, a first connecting groove, and a limiting hole; Multiple third lifting points are located on the outer surface of the arched protective side plate body; Multiple fourth lifting points are evenly distributed on both sides of the arched protective side plate body; The first connecting groove and the limiting hole are respectively provided on both sides of the arched protective side plate body; The limiting hole is adapted to and corresponds one-to-one with the limiting tube; the first connecting groove passes through the arched protective side plate body along the length direction of the protective structure, and multiple corresponding first positioning holes are provided on its two side wing plates.

[0011] Furthermore, the arched protective roof panel includes: an arched protective roof panel body, a fifth lifting point, a sixth lifting point, and a second connecting groove; Multiple fifth lifting points are respectively located on the outer surface of the arched protective top plate body; Multiple sixth lifting points are respectively located on both sides of the arched protective top plate body; The second connecting groove is respectively provided on both sides of the arched protective top plate body, and it penetrates the arched protective top plate body along the length direction of the protective works and corresponds to the position of the first connecting groove; The second connecting groove has multiple corresponding second positioning holes on its two side wing plates, and the second positioning holes correspond one-to-one with the first positioning holes.

[0012] Furthermore, the third connecting member includes: an upper cover plate, a pad plate, a lower cover plate, a positioning pin, and a limiting pin; Multiple positioning pins are fixedly disposed at the bottom end of the upper cover plate, corresponding to the first positioning hole and the second positioning hole; The pad is disposed in the first connecting groove and the second connecting groove, and has a through hole corresponding to the positioning pin. The lower cover plate is located at the bottom end of the arched protective side plate and the arched protective top plate, and has a through hole corresponding to the positioning pin. Two corresponding positioning pins pass through the arched protective side plate body, the arched protective top plate body, the pad plate and the lower cover plate at one end, and are connected by the limiting pins to make the arched protective side plate and the arched protective top plate detachably connected.

[0013] Furthermore, the base plate also includes a wedge-shaped groove and a first lifting point; The wedge-shaped groove is provided on the upper three sides of the base plate; the two base plates are mirror-symmetrically connected by wedge-shaped blocks that are adapted to the wedge-shaped groove to form a basic support unit in the width direction of the protective fortification; multiple such basic support units are connected along the length direction of the protective fortification by wedge-shaped blocks that are adapted to the wedge-shaped groove to form a support structure at the bottom of the protective fortification. The first lifting point is fixedly located on the upper end of the base plate.

[0014] Furthermore, the upright protective wall panel also includes: a second suspension point, a second connector, and a packer; Multiple second lifting points are evenly distributed and fixed on the outside of the upright protective wall panel body, and the second lifting points are detachably connected to the first lifting point through the second connector; The cross-sectional shape of one end of the packer is adapted to the bevel provided on the side of the chute adjacent to the flat steel plate.

[0015] Another aspect of the present invention provides an assembly method for a prefabricated composite structure explosion-proof protective fortification, applicable to the protective fortification described above, comprising the following steps: S1: After leveling the ground in the area to be installed, multiple base plates are hoisted to the working ground using the first lifting point, and the multiple base plates are assembled using wedge grooves; S2: Hoist the upright protective wall panel to the vicinity of the slide groove through the second lifting point, straighten the upright protective wall panel and insert its bottom end into the slide groove, then insert the packer into the slide groove, and connect the first lifting point and the second lifting point with the second connector. Repeat the above steps to complete the installation of all the upright protective wall panels. S3: The arched protective side panels and the arched protective top panel are lifted off the ground using a hoist, and the arched protective top panel and the two arched protective side panels are assembled using two third connectors. Then, the assembled arched protective wall panel is transferred to the top of the upright protective wall panel using a hoist, and the upright protective wall panel and the arched protective wall panel are assembled using the first connector and the limiting hole. S4: Repeat steps S2 and S3. Meanwhile, in the length direction of the protective fortification, connect the upright protective wall panels through positioning bosses, positioning grooves, corresponding positioning holes and positioning pins, and complete the expansion of each module of the protective fortification in the length direction.

[0016] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: 1. The protective structure of the present invention uses the vertical protective wall panel as the core protective layer. The wave impedance gradient design of its multi-layer composite structure can be used to control the propagation path of stress waves. Combined with the alternating arrangement of high wave impedance materials and low wave impedance materials, the energy of the shock wave is gradually attenuated, thereby reducing the self-weight of the structure while effectively meeting the requirements of explosion resistance.

[0017] 2. The protective fortification of the present invention utilizes the wedge-shaped groove to assemble multiple base plates, which not only facilitates operation but also ensures a tight and stable connection, effectively improving the stability and load-bearing capacity of the overall structure. At the same time, it helps to quickly build protective fortifications of the required scale according to actual needs, and is especially suitable for scenarios with high requirements for construction speed and stability. It is also convenient for later disassembly or maintenance and replacement.

[0018] 3. The protective structure of the present invention comprises a first rubber concrete layer and a second rubber concrete layer that convert elasto-plastic energy and absorb kinetic energy through the crack-resistant effect of rubber particles; a foamed concrete layer that absorbs energy through porous compression, reducing peak pressure; a rubber filler layer that dissipates energy through molecular chain slippage and reversible bond breakage and recombination; a UHPC layer that serves as a high-density core layer, blocking fragment penetration with its ultra-high strength; and a structural synergy that enhances the blast resistance of the core protective layer. The outer planar steel plate provides initial impact resistance, and combined with the elastic buffering characteristics of the first rubber concrete, dissipates local energy through the plastic deformation of the first corrugated steel plate. The second corrugated steel plate and the rubber filler layer form a rigid-flexible alternating structure, utilizing the waveform extensibility to disperse impact loads and prolong the impact time. The third and fourth corrugated steel plates absorb residual energy through continuous deformation. The combination of the first and second corrugated steel plates enhances shear buckling resistance and prolongs the shock wave propagation path. The third and fourth corrugated steel plates, combined with the UHPC layer, form a highly ductile bending system that suppresses overall deformation.

[0019] 4. The protective fortification of the present invention, through the detachable connection of the arched protective side plate, the arched protective top plate and the third connecting member, forms an arched protective wall panel system that not only improves the overall stability and impact resistance of the protective fortification, but also significantly enhances construction efficiency and on-site adaptability, enabling uniform stress distribution under explosive impact loads, reducing the risk of local damage, and enhancing the blast resistance safety of the structure.

[0020] 5. The protective fortifications of the present invention, through dry assembly process and modular design, can meet the customized requirements of protective engineering of different scales, and support rapid transportation, efficient and rapid deployment and dismantling, and are especially suitable for wartime emergency scenarios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the protective fortification according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the upright protective wall panel body according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first connector in an embodiment of the present invention; Figure 4 This is a schematic diagram of the assembly of two upright protective wall panel bodies according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the packer assembly according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the arched protective side plate according to an embodiment of the present invention; Figure 7 This is a bottom view of the arched protective side panel according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the arched protective roof plate according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the third connector in an embodiment of the present invention; Figure 10 This is a schematic flowchart illustrating the steps of the protective fortification assembly method according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the steps of the protective fortification dismantling and assembly method according to an embodiment of the present invention.

[0022] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-base plate, 11-wedge groove, 12-slide groove, 13-first lifting point, 2-upright protective wall panel, 21-first connector, 21a-connecting through hole, 21b-limiting tube, 22-upright protective wall panel body, 221-flat steel plate, 222-first rubber concrete layer, 223-first corrugated steel plate, 224-second rubber concrete layer, 225-second corrugated steel plate, 226-rubber filling layer, 227-foamed concrete layer, 228-third corrugated steel plate, 229-UHPC layer, 2210-fourth corrugated steel plate, 2211-positioning boss, 2 212-Positioning groove, 23-Second lifting point, 24-Second connector, 25-Packard, 3-Arched protective wall panel, 31-Arched protective side panel, 311-Arched protective side panel body, 312-Third lifting point, 313-Fourth lifting point, 314-First connecting groove, 314a-First positioning hole, 315-Limiting hole, 32-Arched protective top plate, 321-Arched protective top plate body, 322-Fifth lifting point, 323-Sixth lifting point, 324-Second connecting groove, 324a-Second positioning hole, 33-Third connector, 331-Upper cover plate, 332-Pad plate, 333-Lower cover plate, 334-Positioning pin, Limiting pin 335. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1 like Figures 1 to 9As shown, Embodiment 1 of the present invention provides a prefabricated composite structure explosion-proof protective structure, including: a base plate 1, a vertical protective wall panel 2, and an arched protective wall panel 3; the upper surface of the base plate 1 is provided with a sliding groove 12; the vertical protective wall panel 2 includes: a vertical protective wall panel body 22 that is engaged with the base plate 1 through the sliding groove 12, and a first connecting member 21 disposed at the upper end of the vertical protective wall panel body 22; the arched protective wall panel 3 is engaged with the vertical protective wall panel 2 through the first connecting member 21; wherein, the vertical protective wall panel body 22 includes a flat steel plate 221, a first rubber concrete layer 222, a first corrugated steel plate 223, a second rubber concrete layer 224, a second corrugated steel plate 225, a rubber filling layer 226, a foam concrete layer 227, a third corrugated steel plate 228, a UHPC layer 229, and a fourth corrugated steel plate 2210 that are fixedly connected in sequence. The protective structure of the present invention uses the vertical protective wall panel 2 as the core protective layer. The wave impedance gradient design of its multi-layer composite structure can be used to control the propagation path of stress waves. Combined with the alternating arrangement of high wave impedance materials and low wave impedance materials, the energy of the shock wave is gradually attenuated, thereby reducing the self-weight of the structure while effectively meeting the requirements of explosion resistance.

[0025] It should be noted that the high wave resistance material includes: a flat steel plate 221, a first corrugated steel plate 223, a second corrugated steel plate 225, a third corrugated steel plate 228, and a fourth corrugated steel plate 2210; the low wave resistance material includes: a first rubber concrete layer 222, a second rubber concrete layer 224, a rubber filler layer 226, a foam concrete layer 227, and a UHPC (Ultra-High Performance Concrete) layer 229.

[0026] like Figure 1 As shown, the base plate 1 also includes a wedge-shaped groove 11, which is located on the three upper edges of the base plate 1. Two base plates 1 are mirror-symmetrically joined together by wedge-shaped blocks that fit the wedge-shaped groove 11 to form a basic support unit in the width direction of the protective fortification. Multiple such basic support units are joined together along the length direction of the protective fortification by wedge-shaped blocks that fit the wedge-shaped groove 11 to form the support structure at the bottom of the protective fortification. It can be understood that, through the above design, the assembly of multiple base plates 1 using the wedge-shaped groove 11 is not only convenient to operate, but also ensures a tight and stable connection, effectively improving the stability and load-bearing capacity of the overall structure. At the same time, it helps to quickly build a protective fortification of the required scale according to actual needs, which is especially suitable for scenarios with high requirements for construction speed and stability, and also facilitates later disassembly or maintenance and replacement.

[0027] Furthermore, the base plate 1 also includes a first lifting point 13, which is fixedly disposed on the upper end of the base plate 1. It should be noted that in this embodiment, the first lifting point 13 is a structure commonly used in the prior art for convenient mechanical transfer, such as a lifting ring. In other embodiments, other types of devices may also be used, which are not specifically limited here.

[0028] like Figures 1 to 5 As shown, the upright protective wall panel 2 further includes: a second lifting point 23 and a second connecting member 24; multiple second lifting points 23 are evenly distributed and fixed on the outside of the upright protective wall panel body 22, and the second lifting points 23 are detachably connected to the first lifting point 13 through the second connecting member 24. It can be understood that through the above design, reliable vertical constraint can be provided for the upright protective wall panel 2, avoiding the overturning or displacement of the protective wall panel caused by external forces such as explosion impact, ensuring that the entire protective structure can still maintain its integrity and stability when subjected to impact, and ensuring the effective performance of the protective function; secondly, from the perspective of construction and installation, this design simplifies the connection process between the wall panel and the base plate. Construction personnel do not need complicated positioning and fixing operations. The installation and disassembly of the protective wall panel can be quickly and accurately realized through the lifting points and connecting members, which greatly improves construction efficiency and saves on-site assembly time, especially suitable for emergency protection scenarios with high requirements for construction speed.

[0029] In an optional embodiment, there are at least four second lifting points 23 on the outer side of the upright protective wall panel body 22. It should be noted that the second lifting points 23 are structures commonly used in the prior art for convenient mechanical transfer, such as lifting rings. In other embodiments, other types of devices may also be used, which are not specifically limited here.

[0030] It should be noted that the second connector 24 is a dry connection structure commonly used in the prior art, such as a telescopic rod with locking function. In other embodiments, other types of devices may also be used, which are not specifically limited here.

[0031] Preferably, the first connector 21 is an H-shaped steel plate, with multiple connecting through holes 21a and limiting tubes 21b spaced at equal intervals on its upper web. The first connector 21 is fixedly connected to the upright protective wall panel body 22 through the connecting through holes 21a and fastening connectors, and is detachably connected to the arched protective wall panel 3 through the limiting tubes 21b. It should be noted that the fastening connectors are commonly used fasteners in the prior art, such as screws and nails. In other embodiments, other types of devices may also be used, which are not specifically limited here.

[0032] Furthermore, the upright protective wall panel body 22 is divided into three sections along its width direction. The first section includes a flat steel plate 221, a first rubber concrete layer 222, a first corrugated steel plate 223, and a portion of a second rubber concrete layer 224 bonded to it. The second section includes the remaining second rubber concrete layer 224 connected to the first section, a second corrugated steel plate 225, and a rubber filling layer 226. The third section includes a foam concrete layer 227, a third corrugated steel plate 228, a UHPC layer 229, and a fourth corrugated steel plate 2210. The first section and the second section are offset at the second rubber concrete layer 224 along the length direction of the upright protective wall panel body 22 and are provided with a positioning boss 2211 and a positioning groove 2212. The positioning boss 2211 and the positioning groove 2212 are engaged and connected detachably through positioning holes and positioning pins.

[0033] Furthermore, the upper surfaces of the first, second, and third segments are flush; the first and second segments are of the same length and longer than the third segment, with the difference being the same as the depth of the groove 12; the bottom ends of the first and second segments fall into the groove 12, and the third segment abuts against the upper surface of the base plate 1. It is understood that the edges of the first and second segments are composed of straight lines, facilitating their sliding within the groove 12 to the assembly position. Simultaneously, the third segment's abutment against the upper surface of the base plate 1 further improves connection stability and prevents the upright protective wall panel 2 from tipping over.

[0034] In an optional embodiment, an L-shaped rigid connector is provided on the inner side of the planar steel plate 221, and the L-shaped rigid connector is embedded in the first rubber concrete layer 222 to enhance the connection strength between the planar steel plate 221 and the first rubber concrete layer 222. In an optional embodiment, the third corrugated steel plate 228 and the fourth corrugated steel plate 2210 are provided with a plurality of corresponding L-shaped rigid connectors on their adjacent sides, and the ends of two corresponding L-shaped rigid connectors overlap to ensure interface coordination between the third corrugated steel plate 228 and the fourth corrugated steel plate 2210.

[0035] It should be noted that in this embodiment, the L-shaped rigid connector is a common structure in the prior art, such as an L-shaped steel bar. In other embodiments, other types of devices may be used, which are not specifically limited here.

[0036] In an optional embodiment, the third corrugated steel plate 228 and the fourth corrugated steel plate 2210 are mirror-symmetrical about the central axis of the UHPC layer 229. Their wave height and wave pitch are greater than those of the second corrugated steel plate 225, and the wave height and wave pitch of the second corrugated steel plate 225 are greater than those of the first corrugated steel plate 223. This is to achieve a gradient distribution of structural stiffness and energy absorption capacity through the gradual change of different waveform parameters, thereby significantly improving the dynamic response performance of the protective fortification under explosive impact loads.

[0037] In an optional embodiment, the upright protective wall panel 2 further includes a packer 25, one end of which has a cross-sectional shape that is adapted to the bevel provided on the side of the slide groove 12 adjacent to the flat steel plate 221, in order to further enhance the connection stability between the upright protective wall panel body 22 and the slide groove 12 in conjunction with the third section structure of the upright protective wall panel body 22.

[0038] Understandably, through the above design, the first rubber concrete layer 222 and the second rubber concrete layer 224 convert elasto-plastic energy and absorb kinetic energy through the crack-resistant effect of rubber particles; the foamed concrete 227 absorbs energy through porous compression, reducing peak pressure; the rubber filler layer 226 dissipates energy through molecular chain slippage and reversible bond breaking and recombination; the UHPC layer 229, as a high-density core layer, blocks fragment penetration with its ultra-high strength; simultaneously, the structural synergy enhances the blast resistance of the core protective layer, wherein the outer planar steel plate 221 provides initial impact resistance, combined with the elasticity of the first rubber concrete 222. The first corrugated steel plate 223 dissipates local energy through plastic deformation; the second corrugated steel plate 225 and the rubber filler layer 226 form a rigid-flexible alternating structure, utilizing the ductility of the corrugations to disperse the impact load and prolong the duration of impact; the third corrugated steel plate 228 and the fourth corrugated steel plate 210 absorb residual energy through continuous deformation; the combination of the first corrugated steel plate 223 and the second corrugated steel plate 225 can improve shear buckling resistance and prolong the propagation path of the shock wave; the third corrugated steel plate 228 and the fourth corrugated steel plate 2210, together with the UHPC layer 229, form a high-ductility bending resistance system, suppressing overall deformation.

[0039] like Figure 1 , Figures 6 to 9 As shown, the arched protective wall panel 3 includes: an arched protective side panel 31, an arched protective top panel 32, and a third connecting member 33; the arched protective side panel 31 is detachably connected to the first connecting member 21; the arched protective top panel 32 is detachably connected to the two arched protective side panels 31 on both sides of it through the third connecting member 33.

[0040] Further, the arched protective side panel 31 includes: an arched protective side panel body 311, a third lifting point 312, a fourth lifting point 313, a first connecting groove 314, and a limiting hole 315; a plurality of the third lifting points 312 are disposed on the outer surface of the arched protective side panel body 311; a plurality of the fourth lifting points 313 are evenly distributed on both sides of the arched protective side panel body 311; the first connecting groove 314 and the limiting hole 315 are respectively disposed on both sides of the arched protective side panel body 311; the limiting hole 315 is adapted to and corresponds one-to-one with the limiting tube 21b; the first connecting groove 314 penetrates the arched protective side panel body 311 along the length direction of the protective structure, and a plurality of one-to-one corresponding first positioning holes 314a are provided on its two side wing plates.

[0041] Further, the arched protective roof plate 32 includes: an arched protective roof plate body 321, a fifth lifting point 322, a sixth lifting point 323, and a second connecting groove 324; multiple fifth lifting points 322 are respectively disposed on the outer surface of the arched protective roof plate body 321; multiple sixth lifting points 323 are respectively disposed on both sides of the arched protective roof plate body 321; the second connecting groove 324 is respectively disposed on both sides of the arched protective roof plate body 321, and it penetrates the arched protective roof plate body 321 along the length direction of the protective structure and corresponds to the position of the first connecting groove 314; multiple corresponding second positioning holes 324a are provided on the wing plates on both sides of the second connecting groove 324, and the second positioning holes 324a correspond one-to-one with the first positioning holes 314a.

[0042] In an optional embodiment, the bottom ends of the arched protective side plate body 311 and the arched protective top plate body 321 are corrugated to disperse stress and enhance the explosion-proof performance of the top of the protective structure.

[0043] It should be noted that the third lifting point 312, the fourth lifting point 313, the fifth lifting point 322 and the sixth lifting point 323 are all structures commonly used in the prior art for convenient mechanical transfer, such as lifting rings and lifting rods. In other embodiments, other types of devices may also be used, which are not specifically limited here.

[0044] Further, the third connecting member 33 includes: an upper cover plate 331, a pad plate 332, a lower cover plate 333, a positioning pin 334, and a limiting pin 335; a plurality of positioning pins 334 are fixedly disposed at the bottom end of the upper cover plate 331, corresponding to the first positioning hole 314a and the second positioning hole 324a; the pad plate 332 is disposed in the first connecting groove 314 and the second connecting groove 324, and has through holes corresponding to the positioning pins 334; The lower cover plate 333 is located at the bottom of the arched protective side plate 31 and the arched protective top plate 32, and has through holes corresponding to the positioning pins 334. One end of the two corresponding positioning pins 334 passes through the arched protective side plate body 311, the arched protective top plate body 321, the pad 332 and the lower cover plate 333, and is connected by the limiting pins 335 to make the arched protective side plate 31 and the arched protective top plate 32 detachably connected.

[0045] In an optional embodiment, one of the third connectors 33 is detachably connected to the two arched protective wall panels 3 along the length of the protective structure to further enhance the connection stability of the protective structure.

[0046] It is understandable that, through the above design, the arched protective wall panel system, which is formed by the detachable connection of the arched protective side plate 31, the arched protective top plate 32 and the third connecting member 33, not only improves the overall stability and impact resistance of the protective works, but also significantly enhances construction efficiency and on-site adaptability, so that stress can be evenly distributed under the action of explosive impact load, reducing the risk of local damage and enhancing the explosion-proof safety of the structure.

[0047] Example 2 like Figure 10 and Figure 11 As shown, Embodiment 2 of the present invention provides an assembly method for a prefabricated composite structure explosion-proof protective fortification, comprising the following steps: S1: After leveling the ground in the area to be installed, multiple base plates 1 are hoisted to the working ground using the first lifting point 13, and the multiple base plates 1 are assembled using the wedge groove 11. S2: Hoist the upright protective wall panel 2 to the vicinity of the slide groove 12 through the second lifting point 23, straighten the upright protective wall panel 2 and insert its bottom end into the slide groove 12. Then, insert the packer 25 into the slide groove 12 and connect the first lifting point 13 and the second lifting point 23 with the second connector 24. Repeat the above steps to complete the installation of all the upright protective wall panels 2. S3: The arched protective side panel 31 and the arched protective top panel 32 are lifted off the ground by the hoisting equipment, and the arched protective top panel 32 and the two arched protective side panels 31 are assembled by the two third connecting parts 33. Then, the assembled arched protective wall panel 3 is transferred to the top of the upright protective wall panel 2 by the hoisting equipment, and the upright protective wall panel 2 and the arched protective wall panel 3 are assembled by the first connecting part 21 and the limiting hole 315. S4: Repeat steps S2 and S3. Meanwhile, in the length direction of the protective fortification, the vertical protective wall panels 2 are connected through the positioning boss 2211, positioning groove 2212 and corresponding positioning holes and positioning pins, and the expansion of each module of the protective fortification in the length direction is completed.

[0048] In an optional embodiment, after the assembly of the protective structure is completed, if it is attacked, a damage assessment of its modular components is required. According to the damage assessment, if only some or all of the components of the arched protective wall panel 3 need to be replaced, it is lifted off the vertical protective wall panel 2 using a lifting device and directly replaced. Then, the repaired arched protective wall panel 3 is reassembled with the vertical protective wall panel 2 using a lifting device. If the vertical protective wall panel 2 needs to be replaced, the arched protective wall panel 3, the second connector 24, and the packer 25 must be removed first. The damaged vertical protective wall panel 2 is lifted off using a lifting device, and the intact vertical protective wall panel 2 is transported back to its original position. The aforementioned steps are repeated to install the arched protective wall panel 3, the second connector 24, and the packer 25 to restore the protective structure.

[0049] Understandably, the criteria for replacing the arched protective wall panel 3 are as follows: The weak points at the connection nodes with other arched protective wall panels 3 and vertical protective wall panels 2 are damaged, preventing a proper connection; The blast-facing surface of the arched protective wall panel 3 shows cratering damage with a depth exceeding one-third of the panel thickness; The blast-facing surface of the arched protective wall panel 3 shows cratering damage, and the back surface shows a large bulge; The blast-facing surface of the arched protective wall panel 3 shows cratering damage, and the back surface shows through-and-through tearing damage; The mid-span of the arched protective wall panel 3 is deformed, affecting structural stability. The criteria for replacing the vertical protective wall panel 2 are as follows: The weak points at the connection nodes between the vertical protective wall panel 2 and the arched protective wall panel 3 are damaged, preventing a proper connection; The blast-facing surface of the vertical protective wall panel 2 shows cratering damage with a depth exceeding one-third of the panel thickness; The blast-facing surface of the vertical protective wall panel 2 shows cratering damage, and the back surface shows a large bulge; The blast-facing surface of the vertical protective wall panel 2 shows cratering damage, and the back surface shows through-and-through tearing damage; The bottom end of the vertical protective wall panel 2 experiences shear deformation, affecting structural stability.

[0050] In an optional embodiment, when it is necessary to dismantle the protective fortification, steps S1 to S4 can be repeated in reverse until the entire protective fortification is dismantled and reassembled.

[0051] Other technical features are the same as in Embodiment 1 and can achieve the same technical effects, so they will not be described in detail here.

[0052] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0053] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0054] In this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit it; those skilled in the art will readily understand that the above descriptions are only preferred embodiments of the present invention and are 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 within the protection scope of the present invention.

Claims

1. A prefabricated composite structure explosion-proof protective fortification, characterized in that, include: The base plate (1), the upright protective wall panel (2) and the arched protective wall panel (3); The upper surface of the base plate (1) is provided with a sliding groove (12); The upright protective wall panel (2) includes: an upright protective wall panel body (22) that is engaged with the base plate (1) via the sliding groove (12), and a first connector (21) disposed at the upper end of the upright protective wall panel body (22). The arched protective wall panel (3) is snapped onto the upright protective wall panel (2) by the first connector (21); The upright protective wall panel body (22) includes a flat steel plate (221), a first rubber concrete layer (222), a first corrugated steel plate (223), a second rubber concrete layer (224), a second corrugated steel plate (225), a rubber filling layer (226), a foam concrete layer (227), a third corrugated steel plate (228), a UHPC layer (229), and a fourth corrugated steel plate (2210) that are fixedly connected in sequence. The wave impedance of each layer of material changes in a gradient.

2. The protective fortification according to claim 1, characterized in that, The first connector (21) is an H-shaped steel plate, and its upper web is provided with a plurality of connecting through holes (21a) and limiting tubes (21b) at equal intervals. The first connector (21) is fixedly connected to the upright protective wall panel body (22) through the connecting through hole (21a) and the fastening connector, and is detachably connected to the arched protective wall panel (3) through the limiting tube (21b).

3. The protective fortification according to claim 2, characterized in that, The upright protective wall panel body (22) is divided into three sections along its width direction. The first section includes a flat steel plate (221), a first rubber concrete layer (222), a first corrugated steel plate (223), and a portion of the second rubber concrete layer (224) bonded to it. The second section includes the remaining second rubber concrete layer (224) connected to the first section, a second corrugated steel plate (225), and a rubber filler layer (226). The third section includes a foam concrete layer (227), a third corrugated steel plate (228), a UHPC layer (229), and a fourth corrugated steel plate (2210). The first segment and the second segment are offset along the length of the upright protective wall panel body (22) in the second rubber concrete layer (224) and are provided with positioning bosses (2211) and positioning grooves (2212). The positioning bosses (2211) and the positioning grooves (2212) are engaged and connected in a detachable manner through positioning holes and positioning pins on them. The upper surfaces of the first segment, the second segment and the third segment are flush. The first segment and the second segment have the same length and are longer than the third segment, and the difference between them is the same as the depth of the groove (12). The bottom ends of the first segment and the second segment fall into the groove (12) and the third segment abuts against the upper surface of the base plate (1).

4. The protective fortification according to any one of claims 1-3, characterized in that, The arched protective wall panel (3) includes: an arched protective side panel (31), an arched protective top panel (32), and a third connector (33); the arched protective side panel (31) is detachably connected to the first connector (21); the arched protective top panel (32) is detachably connected to the two arched protective side panels (31) on both sides of it through the third connector (33).

5. The protective fortification according to claim 4, characterized in that, The arched protective side panel (31) includes: an arched protective side panel body (311), a third lifting point (312), a fourth lifting point (313), a first connecting groove (314), and a limiting hole (315). Multiple third lifting points (312) are provided on the outer surface of the arched protective side panel body (311); Multiple fourth lifting points (313) are evenly distributed on both sides of the arched protective side plate body (311); The first connecting groove (314) and the limiting hole (315) are respectively provided on both sides of the arched protective side plate body (311); The limiting hole (315) is adapted to and corresponds one-to-one with the limiting tube (21b); the first connecting groove (314) passes through the arched protective side plate body (311) along the length direction of the protective fortification, and multiple corresponding first positioning holes (314a) are provided on its two side wing plates.

6. The protective fortification according to claim 5, characterized in that, The arched protective roof panel (32) includes: an arched protective roof panel body (321), a fifth lifting point (322), a sixth lifting point (323), and a second connecting groove (324). Multiple fifth lifting points (322) are respectively located on the outer surface of the arched protective top plate body (321); Multiple sixth lifting points (323) are respectively located on both sides of the arched protective top plate body (321); The second connecting groove (324) is respectively provided on both sides of the arched protective top plate body (321), and it penetrates the arched protective top plate body (321) along the length direction of the protective works and corresponds to the position of the first connecting groove (314); The second connecting groove (324) has multiple corresponding second positioning holes (324a) on both sides of the wing plate, and the second positioning holes (324a) correspond to the first positioning holes (314a).

7. The protective fortification according to claim 6, characterized in that, The third connector (33) includes: an upper cover plate (331), a pad plate (332), a lower cover plate (333), a positioning pin (334), and a limiting pin (335); Multiple positioning pins (334) are fixedly disposed at the bottom end of the upper cover plate (331), corresponding to the first positioning hole (314a) and the second positioning hole (324a); The pad (332) is disposed in the first connecting groove (314) and the second connecting groove (324), and has a through hole corresponding to the positioning pin (334); The lower cover plate (333) is located at the bottom of the arched protective side plate (31) and the arched protective top plate (32), and has a through hole corresponding to the positioning pin (334); Two corresponding positioning pins (334) pass through the arched protective side plate body (311), the arched protective top plate body (321), the pad plate (332) and the lower cover plate (333) at one end, and are connected by the limiting pins (335) to make the arched protective side plate (31) and the arched protective top plate (32) detachably connected.

8. The protective fortification according to any one of claims 1-3, characterized in that, The base plate (1) also includes a wedge groove (11) and a first lifting point (13); The wedge-shaped groove (11) is provided on the upper three sides of the base plate (1); the two base plates (1) are mirror-symmetrically connected by wedge-shaped blocks that are adapted to the wedge-shaped groove (11) to form the basic support unit in the width direction of the protective fortification; multiple such basic support units are connected along the length direction of the protective fortification by wedge-shaped blocks that are adapted to the wedge-shaped groove (11) to form the support structure at the bottom of the protective fortification; The first lifting point (13) is fixedly installed on the upper end of the base plate (1).

9. The protective fortification according to claim 8, characterized in that, The upright protective wall panel (2) also includes: a second hanging point (23), a second connector (24), and a packer (25); Multiple second lifting points (23) are evenly distributed and fixed on the outside of the upright protective wall panel body (22), and the second lifting points (23) are detachably connected to the first lifting point (13) through the second connector (24); The cross-sectional shape of one end of the packer (25) is adapted to the bevel provided on the side of the chute (12) near the flat steel plate (221).

10. An assembly method for a prefabricated composite structure explosion-proof protective fortification, applied to the protective fortification as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: After leveling the ground in the area to be installed, use the first lifting point (13) to lift multiple base plates (1) to the working ground, and use the wedge groove (11) to complete the assembly of multiple base plates (1); S2: Hoist the upright protective wall panel (2) to the vicinity of the slide groove (12) through the second lifting point (23), straighten the upright protective wall panel (2) and insert its bottom end into the slide groove (12), then insert the packer (25) into the slide groove (12), and use the second connector (24) to connect the first lifting point (13) and the second lifting point (23). Repeat the above steps to complete the installation of all the upright protective wall panels (2); S3: The arched protective side panel (31) and the arched protective top panel (32) are lifted off the ground by the hoisting equipment, and the arched protective top panel (32) and the two arched protective side panels (31) are assembled by the two third connectors (33). Then, the assembled arched protective wall panel (3) is transferred to the top of the upright protective wall panel (2) by the hoisting equipment, and the upright protective wall panel (2) and the arched protective wall panel (3) are assembled by the first connector (21) and the limiting hole (315). S4: Repeat steps S2 and S3. Meanwhile, in the length direction of the protective fortification, the vertical protective wall panels (2) are connected by positioning bosses (2211), positioning grooves (2212), and corresponding positioning holes and positioning pins, and the extension of each module of the protective fortification in the length direction is completed.

Images