CN114856230A - Ventilation shaft assembled steel construction shed frame that collapses among civil air defense engineering - Google Patents
Ventilation shaft assembled steel construction shed frame that collapses among civil air defense engineering Download PDFInfo
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- CN114856230A CN114856230A CN202210675381.8A CN202210675381A CN114856230A CN 114856230 A CN114856230 A CN 114856230A CN 202210675381 A CN202210675381 A CN 202210675381A CN 114856230 A CN114856230 A CN 114856230A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 150
- 239000010959 steel Substances 0.000 title claims abstract description 150
- 238000009423 ventilation Methods 0.000 title claims abstract description 63
- 230000007123 defense Effects 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims description 13
- 230000002265 prevention Effects 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 12
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 8
- 239000011150 reinforced concrete Substances 0.000 description 19
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- 238000010168 coupling process Methods 0.000 description 15
- 238000005859 coupling reaction Methods 0.000 description 15
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- 238000009434 installation Methods 0.000 description 10
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F17/00—Vertical ducts; Channels, e.g. for drainage
- E04F17/04—Air-ducts or air channels
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/04—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against air-raid or other war-like actions
- E04H9/10—Independent shelters; Arrangement of independent splinter-proof walls
- E04H9/12—Independent shelters; Arrangement of independent splinter-proof walls entirely underneath the level of the ground, e.g. air-raid galleries
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a ventilation shaft assembly type steel structure collapse prevention shed frame in civil air defense engineering, which comprises a steel structure shed frame and a cover plate structure, wherein the ventilation shaft is provided with a waterproof retaining wall exposed out of an outdoor terrace, the waterproof retaining wall is provided with a pre-embedded component, the steel structure shed frame is installed on the waterproof retaining wall through the pre-embedded component in wartime, and the waterproof retaining wall is provided with the cover plate structure used for protecting the pre-embedded component and shielding the ventilation shaft in normal times. The invention can be put into use as soon as possible in wartime and can reduce the influence on the appearance of the city at ordinary times.
Description
Technical Field
The invention relates to the technical field of civil air defense engineering, in particular to a ventilation shaft assembly type steel structure collapse prevention shed frame in civil air defense engineering.
Background
In civil air defense engineering, the conventional weapon and the nuclear weapon cause air pollution during war, water vapor and harmful explosive gas that give off in the stratum, the waste gas that discharges during internal-combustion engine work, water vapor and carbon dioxide that staff discharged when breathing can accumulate in a large number, form unsafe factor. In order to ensure safety, ventilation facilities need to be arranged. A ventilation shaft is one of the ventilation facilities. One end of the ventilation vertical shaft is connected with the space of the underground building, and the other end of the ventilation vertical shaft is provided with a waterproof retaining wall exposed out of the outdoor terrace.
According to the requirement of 'design specification of civil air defense basements GB 50038-2005', in wartime, a collapse-proof shed frame needs to be built above a waterproof retaining wall, the collapse-proof shed frame is used for preventing ventilation vertical shaft from being blocked, and meanwhile, the collapse-proof shed frame can not collapse under the action of preset shock waves and collapse loads of ground buildings.
As shown in fig. 29, the conventional anti-collapse canopy frame is made of reinforced concrete, the height H2 of the reinforced concrete anti-collapse canopy frame 10 is 1200mm, the height H1 of the waterproof retaining wall 11 is 500mm, a window 101 is disposed on the reinforced concrete anti-collapse canopy frame 10, and a louver 102 is disposed in the window 101.
Because the solidification of the reinforced concrete needs 7-28 days, the time is long, the conversion time in battle is short, and cast-in-place reinforced concrete is not allowed, the reinforced concrete collapse-prevention shed frame is built on the waterproof retaining wall at ordinary times so as to be put into use as soon as possible in battle.
However, in civil air defense engineering ventilation vertical shafts in public places such as squares and playgrounds, if the reinforced concrete collapse prevention shed frame is continuously used at ordinary times, the appearance of the city is seriously influenced because the height of the reinforced concrete collapse prevention shed frame is higher.
Therefore, developing a collapse prevention shed frame which can be put into use as soon as possible in wartime and can reduce the influence on the market capacity at ordinary times is a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the collapse-preventing shed frame with the ventilation shaft assembly type steel structure in the civil air defense engineering.
In order to realize the purpose, the invention provides the following technical scheme:
the utility model provides a ventilation shaft assembled steel construction prevents rack that collapses among civil air defense engineering, includes steel construction rack and apron structure, and the ventilation shaft is equipped with the waterproof barricade that exposes outdoor terrace, is equipped with pre-buried subassembly on the waterproof barricade, and in the wartime, the steel construction rack is installed on the waterproof barricade through pre-buried subassembly, at ordinary times, is equipped with the apron structure that is used for protecting pre-buried subassembly and shelters from the ventilation shaft on the waterproof barricade.
Further, the steel structure rack includes braced frame, main holding pole, vice holding pole, rain-proof tile, guard rail, and braced frame is equipped with two at least side by side, and braced frame's long limit is along vertically setting up, braced frame's lower extreme with pre-buried subassembly is connected, is equipped with two main holding poles that set up side by side between two adjacent braced frames, and the long limit of main holding pole is along transversely setting up, and a plurality of vice holding poles have been laid along transversely to the up end of two main holding poles, and the long limit of vice holding pole is along vertically setting up, and rain-proof tile is vertically paved along the up end of vice holding pole, and the long limit of rain-proof tile is along transversely setting up, all is equipped with guard rail between two adjacent braced frames and in braced frame's the inner circle.
Further, braced frame's lower extreme is equipped with the supporting connection board, and the supporting connection board is equipped with the support connecting hole, the edge of waterproof barricade is equipped with pre-buried subassembly, pre-buried subassembly include pre-buried board and rag bolt, and the pre-buried board is equipped with pre-buried connecting hole, and waterproof barricade is buried to rag bolt's lower part, and pre-buried connecting hole, support connecting hole are passed in proper order on rag bolt's upper portion from bottom to top, and rag bolt's upper portion is equipped with mounting nut, and the supporting connection board presss from both sides between mounting nut and pre-buried board.
Further, braced frame includes two support montants that set up side by side and two support horizontal poles that set up side by side, and the long limit of supporting the montant is along vertical setting, and the long limit of supporting the horizontal pole is along vertical setting, and two support montants and two support horizontal poles are connected and are formed the rectangular frame structure, and the lower extreme of supporting the montant is equipped with the support connection board.
Further, the support montant erects the channel-section steel including the first channel-section steel of erectting that is connected and second, and the recess of the channel-section steel is erect to the first recess that erects the channel-section steel and the second sets up face to face, the lower extreme that the channel-section steel was erect to the first lower extreme that erects the channel-section steel and the second lower extreme all with the support connection board is connected, and the upper end that the channel-section steel was erect to the first upper end of erecting the channel-section steel and second all is equipped with the support shrouding.
Furthermore, the supporting vertical rod further comprises a third vertical channel steel, wherein a third vertical channel steel is arranged on one side, away from the first vertical channel steel, of the second vertical channel steel, a groove of the third vertical channel steel is arranged in a manner of facing the second vertical channel steel, the lower end of the third vertical channel steel is connected with the supporting connecting plate, the upper end of the third vertical channel steel is lower than the upper end of the second vertical channel steel, a bearing sealing plate is arranged at the upper end of the third vertical channel steel, a main connecting plate is arranged on the bearing sealing plate, and the main connecting plate is connected with the second vertical channel steel; the main bearing rod comprises a first main channel steel, a second main channel steel and a spacer, wherein a groove of the first main channel steel and a groove of the second main channel steel are arranged back to back, the spacer is arranged between the first main channel steel and the second main channel steel, the first main channel steel and the second main channel steel are connected with the spacer, a main connecting plate is arranged between the first main channel steel and the second main channel steel, and the first main channel steel, the second main channel steel and the main connecting plate are connected through a first fastener.
Furthermore, an auxiliary connecting plate is arranged on the upper end face of the main bearing rod, and the auxiliary bearing rod is connected with the auxiliary connecting plate through a second fastening piece.
Further, rain-proof tile with vice bearing rod passes through coupling assembling to be connected, and coupling assembling includes connecting bolt and connection nut, and connecting bolt locates between two adjacent vice bearing rods, and connecting bolt's lower extreme is equipped with and is used for catching on vice bearing rod and connects the crotch, and rain-proof tile is run through to connecting bolt's upper end, and connecting bolt's upper end is equipped with connection nut, and rain-proof tile presss from both sides between vice bearing rod and connection nut.
Further, the protection railing includes protecting frame and pin, is equipped with a plurality of pins in protecting the inner circle of frame, and the outer lane of protecting frame is equipped with the bolt, braced frame is equipped with the protection connecting plate, and the protection connecting plate is equipped with the intubate, and the bolt is pegged graft with the intubate and is cooperated.
Further, apron structure encloses the fender structure and surrounds including enclosing fender structure and sheltering from the structure pre-buried subassembly, and the top of enclosing the fender structure is equipped with the structure that shelters from that is used for coveing the ventilation shaft.
Compared with the prior art, the invention has the beneficial effects that:
1. at ordinary times and after a war, the ventilation vertical shaft is covered by a cover plate structure, and the embedded component positioned at the upper end of the waterproof retaining wall is enclosed, so that on one hand, people can be prevented from falling into the ventilation vertical shaft, and the safety of people is guaranteed; on the other hand, the external falling object can be prevented from falling into the ventilation shaft, so that the blockage of the ventilation shaft is avoided, and the pressure for dredging and maintaining the ventilation shaft is reduced; on the other hand, the embedded component can be prevented from being damaged by the outside, so that the embedded component can be put into use as soon as possible in wartime; more importantly, compared with the reinforced concrete collapse-prevention shed frame used in the background technology, the height is greatly reduced, so that the influence on the appearance of the city at ordinary times can be reduced.
In wartime, the cover plate structure needs to be dismantled firstly, then the steel structure shed frame is installed on the waterproof retaining wall through the embedded component, and the steel structure shed frame does not need to wait for the solidification of reinforced concrete, so the installation is quick, the steel structure shed frame is favorable for being put into use as soon as possible, and the ventilation shaft is more suitable for the urgency of conversion of imminent war.
In conclusion, the collapse prevention shed frame with the ventilation shaft assembled steel structure in the civil air defense engineering can be put into use as soon as possible in wartime, influence on city appearance at ordinary times can be reduced, the dual purposes of the collapse prevention shed frame with the ventilation shaft assembled steel structure in the civil air defense engineering at ordinary times and in wartime are achieved, and use flexibility is improved.
In addition, in order to further improve the installation efficiency of the steel structure shed frame on the waterproof retaining wall, the steel structure shed frame can be assembled in a factory in advance, and the steel structure shed frame can be directly installed on the site, so that the time can be saved, and the steel structure shed frame can be put into use more quickly in wartime.
2. In the collapse prevention shed frame, the steel structure shed frame reasonably utilizes steel, is beneficial to saving steel, and reduces the manufacturing cost of civil air defense engineering.
3. The vertical supporting rods, the horizontal supporting rods, the main bearing rods, the auxiliary bearing rods and the protective railings which are used for forming the supporting frame are simple in structure, convenient to obtain materials and process, beneficial to improvement of processing efficiency and further beneficial to improvement of construction efficiency of the steel structure collapse-preventing shed frame.
4. According to the invention, the upper end opening of the vertical supporting rod can be shielded by arranging the supporting sealing plate and the bearing sealing plate at the upper end of the vertical supporting rod in the supporting frame, so that rain, snow and dust can be prevented from entering the inside of the vertical supporting rod, the risk of corrosion from the inside of the vertical supporting rod is reduced, the service life of the vertical supporting rod is prolonged, and the maintenance cost is saved.
5. According to the invention, the main connecting plate positioned at the upper end of the supporting vertical rod is inserted between the first main channel steel and the second main channel steel of the main bearing rod, and the first fastener is used for connecting the main bearing rod and the main connecting plate, so that the contact area between the main connecting plate and the main bearing rod can be increased, the reliability of fixedly mounting the main connecting plate and the main bearing rod by using the first fastener is improved, and the structural reliability of the invention is improved.
6. According to the invention, the main bearing rod and the main connecting plate are connected by using the first fastener, and the auxiliary connecting plate and the auxiliary bearing rod are connected by using the second fastener, so that the main bearing rod and the auxiliary bearing rod can be conveniently disassembled and assembled, the disassembly and assembly efficiency can be improved, and the main bearing rod and the auxiliary bearing rod can be conveniently replaced and maintained.
7. The connecting component for mounting the rainproof tile on the auxiliary bearing rod is simple in structure and facilitates the dismounting of the rainproof tile on the auxiliary bearing rod, so that the dismounting efficiency of the rainproof tile on the auxiliary bearing rod is improved, and the rainproof tile can be replaced and maintained conveniently.
8. According to the invention, the bolt is arranged on the protective railing, and the insertion pipe is arranged on the supporting frame, so that the protective railing can be conveniently disassembled and assembled, and the protective railing can be conveniently replaced and maintained.
Drawings
FIG. 1 is a top view of a steel structural shelving;
FIG. 2 is A in FIG. 1 1 -A 1 A cross-sectional view thereof;
FIG. 3 is A in FIG. 1 2 -A 2 A cross-sectional view thereof;
FIG. 4 is a top view of the fastener embedment assembly;
FIG. 5 is a front view of the fastener driving assembly;
FIG. 6 is a front view of the support frame;
FIG. 7 is a left side view of the support frame;
FIG. 8 is B in FIG. 6 1 -B 1 A cross-sectional view thereof;
FIG. 9 is a front view of the reinforcing bar;
FIG. 10 is B in FIG. 6 2 -B 2 A cross-sectional view thereof;
FIG. 11 is B in FIG. 6 3 -B 3 A cross-sectional view thereof;
FIG. 12 is B in FIG. 6 4 -B 4 A cross-sectional view thereof;
FIG. 13 is a cross-sectional view taken at C-C of FIG. 12;
FIG. 14 is a front view of the main support bar;
FIG. 15 is D in FIG. 14 1 -D 1 A cross-sectional view thereof;
FIG. 16 is D in FIG. 14 2 -D 2 A cross-sectional view thereof;
FIG. 17 is a front view of the secondary support bar;
FIG. 18 is E in FIG. 17 1 -E 1 A cross-sectional view thereof;
FIG. 19 is E in FIG. 17 2 -E 2 A cross-sectional view thereof;
FIG. 20 is a front view of the secondary connecting plate;
FIG. 21 is a cross-sectional view taken at F-F of FIG. 20;
FIG. 22 is a schematic view of the assembly of the rain tile and the secondary support bar;
FIG. 23 is a front view of a guard rail;
FIG. 24 is a schematic view of an assembled structure of the protection frame and the latch;
FIG. 25 is a schematic view of the assembled structure of the plug and the insert tube;
FIG. 26 is a cross-sectional view taken at G-G of FIG. 25;
FIG. 27 is a schematic view of an assembled structure of a guard rail and a vertical support post;
FIG. 28 is a schematic structural view of a cover plate structure;
fig. 29 is a schematic structural view of a reinforced concrete collapse prevention shed in the background art.
In the figure:
1-a ventilation shaft, wherein the ventilation shaft is provided with a ventilation hole,
11-a water-proof retaining wall, wherein,
12-embedded components, 121-embedded plates, 1211-embedded connecting holes, 122-foundation bolts,
2-a support frame for supporting the frame,
21-support connection plate, 211-support connection hole,
22-support vertical bar, 221-reinforcing bar, 222-first vertical channel, 223-second vertical channel, 224-support closing plate, 225-third vertical channel, 226-main connecting plate, 227-support closing plate, 228-protective connecting plate, 2281-insertion tube,
23-support cross bar, 231-first transverse channel, 232-second transverse channel,
3-main supporting rods, 31-first main channel steel, 32-second main channel steel, 33-spacers, 34-auxiliary connecting plates,
4-an auxiliary supporting rod is arranged on the upper part of the supporting rod,
5-the rain-proof tile is made of,
51-connecting assembly, 511-connecting bolt, 5111-connecting hook, 512-connecting nut, 513-rubber pad, 514-washer,
6-a protective barrier for the air conditioner,
61-a protective frame, 611-a latch,
62-the stop lever is arranged on the upper portion of the frame,
7-the masonry structure of the red bricks,
8-a prefabricated cover plate made of reinforced concrete,
9-a slope-finding layer is arranged,
10-reinforced concrete anti-collapse canopy frame, 101-window, 102-shutter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1-3, a collapse-preventing shed frame of a ventilation shaft assembled steel structure in civil air defense engineering comprises a steel structure shed frame and a cover plate structure.
The steel structure rack includes braced frame 2, main bearing pole 3, vice bearing pole 4, rain-proof tile 5, guard rail 6. Fig. 1 is a top view of the steel structure canopy frame of this embodiment, and the secondary support rods 4 and the rain tiles 5 are not shown in order to clearly show the positional relationship between the support frame 2 and the primary support rods 3.
As shown in fig. 1, at least two support frames 2 are arranged side by side, and in the case that the transverse span is less than or equal to 2100mm, two support frames 2 are arranged side by side; for a transverse span of more than 2100mm, the support frames need to be arranged in plurality side by side. The long limit of braced frame 2 is along vertically setting up, is equipped with two main bearing rods 3 that set up side by side between two adjacent braced frame 2, and the long limit of main bearing rod 3 is along transversely setting up. FIG. 2 is A in FIG. 1 1 -A 1 In a cross-sectional view, FIG. 3 is A in FIG. 1 2 -A 2 In the section view, in order to clearly show the position relationship between the main support rods 3 and the auxiliary support rods 4, the rain-proof tiles 5 are not shown in fig. 2 and 3, as shown in fig. 2-3, a plurality of auxiliary support rods 4 are evenly laid on the upper end surfaces of the two main support rods 3 along the transverse direction, and the long edges of the auxiliary support rods 4 are arranged along the longitudinal direction. The upper end face of the auxiliary support rod 4 is longitudinally covered with rain-proof tiles 5, as shown in fig. 22, and the long sides of the rain-proof tiles 5 are arranged in the transverse direction. As shown in fig. 2-3, guard rails 6 are arranged between two adjacent supporting frames 2 and in the inner rings of the supporting frames 2, so that the guard rails 6 are arranged on the front, back, left and right sides of the whole steel structure shed frame.
As shown in fig. 2 to 3, the ventilation shaft 1 is provided with a waterproof retaining wall 11 which exposes the outdoor terrace, and the waterproof retaining wall 11 can prevent water on the outdoor terrace from entering the ventilation shaft 1. The waterproof retaining wall 11 is of a reinforced concrete structure.
In order to facilitate the installation of the steel structure shed frame on the waterproof retaining wall 11, when the waterproof retaining wall 11 is built, the embedded components 12 are embedded in four corners of the waterproof retaining wall 11, and the embedded components 12 are used for connecting the steel structure shed frame of the embodiment.
As shown in fig. 4-5, the embedment assembly 12 includes an embedment plate 121 and anchor bolts 122. The embedded plate 121 may be an embedded iron plate, four embedded connection holes 1211 are formed in the embedded plate 121, a portion of the anchor bolt 122 having the external thread on the upper portion thereof penetrates through the embedded connection holes 1211, and a portion of the anchor bolt 122 having the hook on the lower portion thereof is embedded in the waterproof retaining wall 11. After the waterproof retaining wall 11 is cured and molded, the upper end surface of the embedded plate 121 is flush with the upper end surface of the waterproof retaining wall 11, the part of the anchor bolt 122 with the upper external thread is exposed from the upper end surface of the embedded plate 121, and the anchor bolt 122 exposed from the upper end surface of the embedded plate 121 is used for connecting the steel structure shed frame of the embodiment.
As shown in fig. 1-3, the supporting frame 2 is a foundation structure of the steel-structure canopy frame of this embodiment, and the supporting frame 2 is directly installed with the waterproof retaining wall 11. The lower extreme welded fastening of braced frame 2 has supporting connection board 21, and supporting connection board 21 is equipped with supporting connection hole 211, and supporting connection hole 211 is used for upwards being worn out by the part that rag bolt 122 upper portion was equipped with the external screw thread to through screwing up mounting nut (not shown in the figure) on rag bolt 122, suppress supporting connection board 21 on pre-buried board 121, thereby realize braced frame 2 in the installation of waterproof barricade 11 up end.
When the steel structure shed frame of the embodiment needs to be installed on the ventilation shaft 1, the steel structure shed frame of the embodiment can be assembled in a factory in advance, and the steel structure shed frame can be directly installed on the site. Because the part of the ventilation shaft 1, which is exposed out of the waterproof retaining wall 11 of the outdoor terrace, is in direct contact with the supporting frame 2 in the steel structure shed frame, only the supporting frame 2 needs to be directly installed on the waterproof retaining wall 11. When installing the supporting frame 2 to the waterproof retaining wall 11, the following operations are required: firstly, a worker aligns the support coupling holes 211 on the support coupling plate 21 at the lower end of the support frame 2 with the anchor bolts 122; then, the worker lowers the support frame 2 to let the anchor bolts 122 pass through the support connection holes 211; finally, the worker unscrews the mounting nut on the anchor bolt 122 to press the support connection plate 21 against the embedded plate 121, and the mounting can be completed.
When the steel structure shed frame of this embodiment needs to be detached from the ventilation shaft 1, only the supporting frame 2 needs to be detached from the waterproof retaining wall 11, and the detaching operation is: first, a worker unscrews the mounting nut from the anchor bolt 122; then, the worker lifts the steel structure shelving of the embodiment upward, so that the anchor bolts 122 are withdrawn from the support connection holes 211, and the steel structure shelving of the embodiment can be detached from the ventilation shaft 1.
Can know through the above-mentioned process, pre-buried subassembly 12 and the setting of supporting connection board 21 can make things convenient for the steel construction rack of this embodiment and ventilation shaft 1's dismouting, not only is favorable to improving the installation effectiveness, still is favorable to improving dismantlement efficiency, more adapts to the urgency of ventilation shaft 1 conversion of just fighting.
Next, the concrete structure of the steel structure canopy frame of the present embodiment will be described in detail.
As shown in fig. 1 to 3, the supporting frames 2 are the basic structure of the steel structure canopy frame of the present embodiment, in the present embodiment, two supporting frames 2 are arranged side by side, and the long sides of the supporting frames 2 are arranged along the longitudinal direction. As shown in fig. 6, each support frame 2 includes a support vertical bar 22 and a support cross bar 23. The two vertical support rods 22 are arranged side by side, and the two horizontal support rods 23 are also arranged side by side. The long edge of the supporting vertical rod 22 is vertically arranged, the long edge of the supporting transverse rod 23 is longitudinally arranged, and the two supporting vertical rods 22 and the two supporting transverse rods 23 form a rectangular frame structure through welding. As shown in fig. 6-8, a support connecting plate 21 is welded to the lower end of each support vertical rod 22.
As shown in fig. 6 to 9, in order to improve the stability of the vertical support rod 22 standing on the support connecting plate 21, a reinforcing rib 221 is provided between the vertical support rod 22 and the support connecting plate 21, the side wall of the lower end of the vertical support rod 22 is welded and fixed to the side edge of the reinforcing rib 221, and the lower end of the reinforcing rib 221 is welded and fixed to the upper end face of the support connecting plate 21.
As shown in fig. 8, 10, 12 and 13, the vertical support member 22 comprises two channel beams. For convenience of description, the two channels are respectively referred to as a first vertical channel 222 and a second vertical channel 223. The groove of the first vertical channel 222 and the groove of the second vertical channel 223 are arranged in a face-to-face manner, and the first vertical channel 222 and the second vertical channel 223 are welded and fixed. As shown in fig. 6 to 8, the lower end of the first vertical channel 222 and the lower end of the second vertical channel 223 are welded to the upper end surface of the support connection plate 21, and the upper end of the first vertical channel 222 is flush with the upper end of the second vertical channel 223. As can be seen from the description in this section, the supporting vertical rod 22 has a simple structure, is convenient for material collection and processing, and is beneficial to improving the processing efficiency of the supporting vertical rod 22.
As shown in fig. 13, in order to prevent rain and snow dust from entering the grooves of the first vertical channel 222 and the second vertical channel 223, a support sealing plate 224 is welded and fixed to the upper end of the first vertical channel 222 and the upper end of the second vertical channel 223, and the setting of the support sealing plate 224 can prevent rain and snow dust from entering the grooves of the first vertical channel 222 and the second vertical channel 223, so that the risk of corrosion from the inside of the support vertical rod 22 is reduced, the service life of the support vertical rod 22 is prolonged, and the maintenance cost is saved.
As shown in fig. 11, the support rail 23 includes two channel beams. For convenience of description, the two channel beams are respectively referred to as a first transverse channel beam 231 and a second transverse channel beam 232, a groove of the first transverse channel beam 231 and a groove of the second transverse channel beam 232 are arranged in a face-to-face manner, and the first transverse channel beam 231 and the second transverse channel beam 232 are welded and fixed. As shown in fig. 6 and 8, both the end of the first transverse channel 231 and the end of the second transverse channel 232 are welded to the vertical support bar 22. As can be seen from the introduction of this section, the supporting cross rod 23 has a simple structure, is convenient to take materials and process, and is beneficial to improving the processing efficiency of the supporting cross rod 23.
As shown in fig. 1-3, the number of the main support rods 3 is two, the long side of the main support rod 3 is arranged along the transverse direction, the two main support rods 3 are fixedly installed together with the upper ends of the two support frames 2, from the top view as shown in fig. 1, the two main support rods 3 and the two support frames 2 form a rectangular frame structure, and the main support rods 3 serve as a building foundation for the auxiliary support rods 4.
As shown in fig. 8, 10 and 13, in order to improve the reliability of the main support rod 3 mounted on the support frame 2, the support vertical rod 22 in the support frame 2 further includes a third vertical channel 225, the third vertical channel 225 is disposed on a side of the second vertical channel 223 away from the first vertical channel 222, a groove of the third vertical channel 225 faces the second vertical channel 223, the third vertical channel 225 is welded to the second vertical channel 223, a lower end of the third vertical channel 225 is welded to an upper end surface of the support connecting plate 21, as shown in fig. 13, the upper end of the third vertical channel 225 is lower than the upper end of the second vertical channel 223, as shown in fig. 6, 7, 12 and 13, a main connecting plate 226 is welded to the upper end of the third vertical channel 225, the side of the main connecting plate 226 is welded to the second vertical channel 223, and the main connecting plate 226 is fixed to the main support bar 3 by a first fastener (e.g. a bolt, not shown). It can be seen from this description that the main connecting plate 226 can be supported by the third vertical channel 225, so that the reliability of the main connecting plate 226 can be improved, and the reliability of the main support rod 3 mounted together with the main connecting plate 226 can be improved.
As shown in fig. 12 to 13, in order to prevent rain and snow dust from entering the groove of the third vertical channel 225, a bearing sealing plate 227 is welded and fixed to the upper end of the third vertical channel 225, the lower end of the main connecting plate 226 is welded and fixed to the upper end face of the bearing sealing plate 227, and the bearing sealing plate 227 is arranged to prevent rain and snow dust from entering the groove of the third vertical channel 225, so that the risk of corrosion from the inside of the supporting vertical rod 22 is reduced, the service life of the supporting vertical rod 22 is prolonged, and the maintenance cost is saved.
As shown in figures 14-16, the main support bar 3 includes spacers 33 and two channel beams. For convenience of description, two of the channels are referred to as a first main channel 31 and a second main channel 32. The groove of first main channel steel 31 and the groove of second main channel steel 32 set up back to back, and spacer 33 sets up between first main channel steel 31 and second main channel steel 32, and first main channel steel 31 and second main channel steel 32 all with spacer 33 welded fastening. The setting of spacer 33 is in order to separate first main channel steel 31 and second main channel steel 32, lets the clearance between first main channel steel 31 and the second main channel steel 32 can let the main connecting plate 226 insert, and then lets the area of contact increase of main connecting plate 226 and main bearing rod 3 to in the reliability of the first fastener fixed mounting main connecting plate 226 of use and main bearing rod 3 improves. In addition, from this paragraph introduction can know, main bearing pole 3 simple structure, be convenient for draw materials, the processing of being convenient for is favorable to improving the machining efficiency of main bearing pole 3.
As shown in fig. 3, a plurality of the auxiliary support rods 4 are arranged side by side, all the auxiliary support rods 4 are uniformly laid on the upper end surface of the main support rod 3 in the transverse direction, and the long sides of the auxiliary support rods 4 are arranged in the longitudinal direction. The upper end face of the main support rod 3 is welded and fixed with an auxiliary connecting plate 34, in fig. 17, the auxiliary connecting plate 34 is welded on a partial area of the main support rod 3, as shown in fig. 20-21, the auxiliary connecting plate 34 adopts angle steel, as shown in fig. 17-19, and the auxiliary support rod 4 adopts channel steel. The secondary support rod 4 is fixedly attached to the secondary connecting plate 34 by a second fastener (e.g., a bolt, not shown). As can be seen from the description in this section, the auxiliary bearing rod 4 has a simple structure, is convenient for material taking and processing, and is beneficial to improving the processing efficiency of the auxiliary bearing rod 4; and, the connected mode of vice bearing rod 4 and main bearing rod 3 is simple, is favorable to improving dismouting efficiency, makes things convenient for the change of vice bearing rod 4 to maintain.
The protection tiles are arranged side by side, all the protection tiles are longitudinally paved on the upper end face of the auxiliary bearing rod 4, and the long edges of the protection tiles are transversely arranged. In this embodiment, the rain-proof tile 5 is made of wave-shaped transparent glass fiber reinforced plastic tile. As shown in fig. 22, in order to facilitate the attachment and detachment of the rain tiles 5 and the sub-support bar 4, the rain tiles 5 are attached to the sub-support bar 4 through the connecting member 51. The coupling assembly 51 includes a coupling bolt 511 and a coupling nut 512. Connecting bolt 511 is located between two adjacent vice bearing rods 4, connecting bolt 511's lower extreme is equipped with connection crotch 5111, connection crotch 5111 can catch on vice bearing rod 4, connecting bolt 511's upper end runs through rain-proof tile 5, it is specific, can set up the hole (not shown in the figure) on rain-proof tile 5, let connecting bolt 511 pass this hole from bottom to top, it runs through rain-proof tile 5 to realize connecting bolt 511, upper end threaded connection at connecting bolt 511 has connection nut 512, rain-proof tile 5 presss from both sides between vice bearing rod 4 and connection nut 512.
As shown in fig. 22, when the rain tile 5 is attached to the sub-support bar 4 by the connecting member 51, the following operations are required: (1) the worker penetrates the upper end of the connecting bolt 511 through the rain tile 5. (2) The worker lowers the connecting bolt 511 so that the connecting hook 5111 at the lower end of the connecting bolt 511 is inserted between two adjacent sub-support rods 4, and the worker rotates the connecting bolt 511 to adjust the position of the connecting hook 5111 so that the connecting hook 5111 is rotated to a position just below the sub-support rods 4. (3) The worker lifts the coupling bolt 511 so that the coupling hook 5111 is abutted against the sub-bearing bar 4. (4) The worker twists connecting nut 512 up to connecting bolt 511 for rain-proof tile 5 presss from both sides between vice bearing rod 4 and connecting nut 512, can realize the installation of rain-proof tile 5 on vice bearing rod 4. According to the installation mode, the upper end face of the auxiliary bearing rod 4 is fully paved with the rain-proof tiles 5.
As shown in fig. 22, when the rain tile 5 is detached from the auxiliary support rod 4, the following operations are required: (1) the worker unscrews the coupling nut 512 from the upper end of the coupling bolt 511, pinches the upper end of the coupling bolt 511, and pushes down the coupling bolt 511 so that the coupling hook 5111 is disengaged from the sub-bearing bar 4. (2) The worker rotates the connecting bolt 511 to allow the connecting hook 5111 to be rotated between two adjacent sub-support rods 4, so that the connecting hook 5111 is prevented from being caught by the sub-support rods 4 when the connecting bolt 511 is lifted up. (3) The workman lifts connecting bolt 511 for connecting crotch 5111 and coming out from the clearance between two adjacent vice bearing rod 4 smoothly, the rain-proof tile 5 that is run through by connecting bolt 511 this moment can be mentioned, makes rain-proof tile 5 and vice bearing rod 4 separation, can realize the split of rain-proof tile 5 and vice bearing rod 4.
Can know through the dismouting process of above-mentioned rain-proof tile 5 with vice bearing rod 4, coupling assembling 51's setting can make things convenient for the dismouting of rain-proof tile 5 on vice bearing rod 4 to be favorable to improving the dismouting efficiency of rain-proof tile 5 on vice bearing rod 4, also can be convenient for change and maintain rain-proof tile 5.
As shown in fig. 22, in order to prevent the rain-proof tile 5 from being damaged by the connecting nut 512, the connecting assembly 51 further comprises a rubber pad 513 and a washer 514, the rubber pad 513 and the washer 514 are arranged between the rain-proof tile 5 and the connecting nut 512, and the rubber pad 513 and the washer 514 are sleeved on the connecting bolt 511
In addition, in order to improve the effect of the rain-proof tiles 5 for shielding rain and snow, the rain-proof tiles 5 with longer length can be adopted to increase the coverage area of the rain-proof tiles 5, thereby being beneficial to improving the effect of shielding rain and snow.
As shown in fig. 2-3, guard rails 6 are disposed between two supporting frames 2 and in the inner rings of the supporting frames 2, so that the guard rails 6 are mounted on four sides of the steel structure shed frame of this embodiment. As shown in fig. 23, the guard rail 6 includes a guard frame 61 and a plurality of stop bars 62, the stop bars 62 are uniformly arranged in an inner ring of the guard frame 61, and the stop bars 62 are welded and fixed to the guard frame 61. The protection frame 61 is a rectangular frame structure welded by steel pipes. The stop lever 62 may be made of a round steel directly. As can be known from the introduction of this section, the guard rail 6 is simple in structure, convenient to take materials and process, and beneficial to improving the processing efficiency of the guard rail 6.
As shown in fig. 23 to 26, in order to facilitate the installation of the guard rail 6, a bolt 611 is welded to the outer ring of the guard frame 61, and the bolt 611 may be an inverted U-shaped steel bar. The protective connecting plate 228 is welded on the supporting vertical rod 22, the inserting tube 2281 is welded on the protective connecting plate 228, and when the inserting pin 611 is inserted into the inserting tube 2281, the protective handrail 6 can be installed; removal of the guard rail 6 can be achieved when the bolt 611 is withdrawn from the insertion tube 2281. Through the operation of above-mentioned dismouting guard rail 6 can know, bolt 611 and intubate 2281's setting can conveniently prevent the dismouting of guard rail 6 to conveniently change and maintain guard rail 6.
In addition, if the protection rail 6 needs to be fixed, the insertion pin 611 and the insertion tube 2281 can be welded after the insertion pin 611 is inserted into the insertion tube 2281, so that the protection rail 6 can be fixed. In addition, louvers may be installed between the two support frames 2 and in the inner rings of the support frames 2, and in order to prevent interference between the louvers and the guard rail 6, the louvers are located further outside than the guard rail 6. Consider that the steel construction rack that this embodiment provided is the steel construction, when need not use at ordinary times, need put into protection component storehouse, take care of rust-resistant maintenance.
The cover plate structure is used for covering the ventilation shaft 1 at ordinary times and protecting the embedded component 12 embedded at the upper end of the waterproof retaining wall 11, so that the embedded component 12 can be immediately put into use after the cover plate structure is detached.
As shown in fig. 28, the cover plate structure includes a surrounding structure and a shielding structure, the surrounding structure is used for surrounding the embedded component 12 located at the upper end of the waterproof retaining wall 11, the shielding structure is arranged above the surrounding structure, and the shielding structure is used for covering the ventilation shaft 1.
Specifically, enclose fender structure and adopt red brick masonry structure 7, red brick masonry structure 7 encloses at the up end of waterproof barricade 11 and establishes round mechanism red brick (mechanism red brick is the red brick that the machine produced), uses cement mortar to build the mechanism red brick at the up end of waterproof barricade 11, forms red brick masonry structure 7, and pre-buried subassembly 12 is located the inner circle of red brick masonry structure 7.
The shielding structure adopts a reinforced concrete prefabricated cover plate 8, the reinforced concrete prefabricated cover plate 8 is built above the red brick building structure 7, and the upper end of the ventilation vertical shaft 1 is sealed.
In order to improve the waterproof effect of the cover plate structure, the cover plate structure further comprises a slope layer 9 and a waterproof layer (not shown in the figure). And paving a slope on the upper end surface of the reinforced concrete prefabricated cover plate 8 by using cement mortar to form a slope finding layer 9. And coating a base layer treating agent on the upper end surface of the slope finding layer 9, and paving a high polymer modified asphalt waterproof coiled material as a waterproof layer.
In order to improve the protection effect on the cover plate structure, the cover plate structure further comprises a protection layer. And paving a reinforcing mesh above the waterproof layer, coating fine aggregate concrete, and forming a protective layer after the fine aggregate concrete is solidified.
The use method of the anti-collapse shed frame with the ventilation shaft assembly type steel structure in the civil air defense engineering comprises the following steps:
at ordinary times (namely during non-wartime) and after wartime, the ventilation vertical shaft 1 needs to be covered by a cover plate structure, and the embedded component 12 positioned at the upper end of the waterproof retaining wall 11 is enclosed, so that on one hand, people can be prevented from falling into the ventilation vertical shaft 1, and the safety of people is guaranteed; on the other hand, the external falling object can be prevented from falling into the ventilation shaft 1, the blockage 1 of the ventilation shaft is avoided, and the dredging and maintaining pressure on the ventilation shaft 1 is reduced; on the other hand, the embedded component 12 can be prevented from being damaged by the outside, so that the embedded component 12 can be put into use as soon as possible in wartime; more importantly, compared with the reinforced concrete collapse-prevention shed frame used in the background technology, the height is greatly reduced, so that the influence on the appearance of the city at ordinary times can be reduced.
In wartime, the cover plate structure needs to be removed firstly, then the steel structure shed frame is installed on the waterproof retaining wall 11 through the embedded component 12, and the steel structure shed frame is not required to wait for the solidification of reinforced concrete, so that the installation is quick, the steel structure shed frame is favorable for being put into use as soon as possible, and the ventilation shaft 1 is more suitable for the urgency of battle conversion.
In conclusion, the collapse prevention shed frame of the ventilation shaft assembled steel structure in the civil air defense engineering provided by the embodiment can be put into use as soon as possible in wartime, can reduce the influence on city appearance at ordinary times, realizes the dual-purpose of the collapse prevention shed frame of the ventilation shaft assembled steel structure in the civil air defense engineering at ordinary times and in wartime, and improves the use flexibility.
In addition, in order to further improve the installation efficiency of the steel structure canopy frame on the waterproof retaining wall 11, the steel structure canopy frame of the embodiment can be assembled in a factory in advance, and the steel structure canopy frame can be directly installed on the spot, so that the time can be saved, and the steel structure canopy frame can be put into use in wartime more quickly.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides a ventilation shaft assembled steel construction prevents rack that collapses among civil air defense engineering, the ventilation shaft is equipped with the waterproof barricade that exposes outdoor terrace, a serial communication port, including steel construction rack and apron structure, be equipped with pre-buried subassembly on the waterproof barricade, in the wartime, the steel construction rack passes through pre-buried subassembly and installs on waterproof barricade, at ordinary times, is equipped with the apron structure that is used for protecting pre-buried subassembly and shelters from the ventilation shaft on the waterproof barricade.
2. The collapse prevention shed frame of the ventilation shaft assembly type steel structure in the civil air defense engineering as claimed in claim 1, wherein the steel structure shed frame comprises two support frames, two main bearing rods, two auxiliary bearing rods, rain-proof tiles and guard rails, the two support frames are arranged side by side at least, the long edges of the two support frames are longitudinally arranged, the lower ends of the support frames are connected with the embedded components, the two main bearing rods arranged side by side are arranged between the two adjacent support frames, the long edges of the main bearing rods are transversely arranged, the plurality of auxiliary bearing rods are transversely paved on the upper end faces of the two main bearing rods, the long edges of the auxiliary bearing rods are longitudinally arranged, the rain-proof tiles are longitudinally paved on the upper end faces of the auxiliary bearing rods, the long edges of the rain-proof tiles are transversely arranged, and the guard rails are arranged between the two adjacent support frames and in the inner rings of the support frames.
3. The collapse prevention shed frame of the assembly type steel structure of the ventilation shaft in the civil air defense engineering as claimed in claim 2, wherein the lower end of the supporting frame is provided with a supporting connecting plate, the supporting connecting plate is provided with a supporting connecting hole, the corners of the waterproof retaining wall are provided with the pre-embedded components, the pre-embedded components comprise pre-embedded plates and foundation bolts, the pre-embedded plates are provided with pre-embedded connecting holes, the lower parts of the foundation bolts are embedded into the waterproof retaining wall, the upper parts of the foundation bolts sequentially pass through the pre-embedded connecting holes and the supporting connecting hole from bottom to top, the upper parts of the foundation bolts are provided with mounting nuts, and the supporting connecting plate is clamped between the mounting nuts and the pre-embedded plates.
4. The collapse prevention shed frame of the fabricated steel structure of the ventilation shaft in the civil air defense engineering as claimed in claim 3, wherein the support frame comprises two vertical support rods arranged side by side and two horizontal support rods arranged side by side, the long side of each vertical support rod is arranged vertically, the long side of each horizontal support rod is arranged longitudinally, the two vertical support rods and the two horizontal support rods are connected to form a rectangular frame structure, and the lower ends of the vertical support rods are provided with the support connecting plates.
5. The collapse prevention shed frame of the assembly type steel structure of the ventilation shaft in the civil air defense engineering as claimed in claim 4, wherein the support vertical rod comprises a first vertical channel steel and a second vertical channel steel which are connected, a groove of the first vertical channel steel and a groove of the second vertical channel steel are arranged in a face-to-face mode, a lower end of the first vertical channel steel and a lower end of the second vertical channel steel are both connected with the support connecting plate, and support sealing plates are arranged at an upper end of the first vertical channel steel and an upper end of the second vertical channel steel.
6. The collapse prevention shed frame of the assembly type steel structure of the ventilation shaft in the civil air defense engineering, according to claim 5, is characterized in that the supporting vertical rod further comprises a third vertical channel steel, the second vertical channel steel is provided with a third vertical channel steel on the side far away from the first vertical channel steel, the groove of the third vertical channel steel is arranged facing the second vertical channel steel, the lower end of the third vertical channel steel is connected with the supporting connecting plate, the upper end of the third vertical channel steel is lower than the upper end of the second vertical channel steel, the upper end of the third vertical channel steel is provided with a bearing sealing plate, a main connecting plate is arranged on the bearing sealing plate, and the main connecting plate is connected with the second vertical channel steel;
the main bearing rod comprises a first main channel steel, a second main channel steel and a spacer, wherein a groove of the first main channel steel and a groove of the second main channel steel are arranged back to back, the spacer is arranged between the first main channel steel and the second main channel steel, the first main channel steel and the second main channel steel are connected with the spacer, a main connecting plate is arranged between the first main channel steel and the second main channel steel, and the first main channel steel, the second main channel steel and the main connecting plate are connected through a first fastener.
7. The collapse prevention shed frame of the prefabricated steel structure for the ventilation shaft in the civil air defense construction as claimed in claim 6, wherein the upper end surface of the main support rod is provided with an auxiliary connecting plate, and the auxiliary support rod is connected with the auxiliary connecting plate through a second fastening member.
8. The collapse prevention shed frame of the assembled steel structure for the ventilation shaft in the civil air defense engineering as claimed in claim 1, wherein the rain-proof tiles are connected with the auxiliary bearing rods through the connecting members, the connecting members comprise connecting bolts and connecting nuts, the connecting bolts are arranged between two adjacent auxiliary bearing rods, the lower ends of the connecting bolts are provided with connecting hooks for hooking the auxiliary bearing rods, the upper ends of the connecting bolts penetrate through the rain-proof tiles, the upper ends of the connecting bolts are provided with the connecting nuts, and the rain-proof tiles are clamped between the auxiliary bearing rods and the connecting nuts.
9. The collapse prevention shed frame of the assembled steel structure for the ventilation shaft in the civil air defense engineering as claimed in claim 1, wherein the protection handrail comprises a protection frame and a stop rod, a plurality of stop rods are arranged in the inner ring of the protection frame, the outer ring of the protection frame is provided with a plug pin, the supporting frame is provided with a protection connecting plate, the protection connecting plate is provided with an insertion pipe, and the plug pin is in plug-in fit with the insertion pipe.
10. The collapse prevention shed frame of the prefabricated steel structure for the ventilation shaft in the civil air defense engineering as claimed in claim 1, wherein the cover plate structure comprises a surrounding structure and a shielding structure, the surrounding structure surrounds the embedded component, and the shielding structure for covering the ventilation shaft is arranged above the surrounding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210675381.8A CN114856230B (en) | 2022-06-15 | Assembled steel construction of ventilation shaft in civil air defense engineering prevents shed frame that collapses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210675381.8A CN114856230B (en) | 2022-06-15 | Assembled steel construction of ventilation shaft in civil air defense engineering prevents shed frame that collapses |
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| CN114856230A true CN114856230A (en) | 2022-08-05 |
| CN114856230B CN114856230B (en) | 2024-10-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115822322A (en) * | 2022-10-19 | 2023-03-21 | 济南市人防建筑设计研究院有限责任公司 | Automobile ramp assembly type steel structure anti-collapse shed frame and design method thereof |
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