CN115853570A - Prefabricated rail top air duct assembly type structure based on foamed ceramics and construction method - Google Patents
Prefabricated rail top air duct assembly type structure based on foamed ceramics and construction method Download PDFInfo
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- CN115853570A CN115853570A CN202310160213.XA CN202310160213A CN115853570A CN 115853570 A CN115853570 A CN 115853570A CN 202310160213 A CN202310160213 A CN 202310160213A CN 115853570 A CN115853570 A CN 115853570A
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Abstract
The invention provides a prefabricated rail top air channel assembly type structure based on foamed ceramics and a construction method, wherein the side wall and the bottom plate of a rail top air channel unit are made of foamed ceramics, and the light weight of the subway station rail top air channel unit is realized on the premise of meeting the structural strength, so that the installation and construction efficiency of the subway station rail top air channel is greatly improved, the construction period is shortened, and the construction safety is ensured. The rail top air duct assembly type structure comprises a plurality of rail top air duct units which are prefabricated in a split mode; two foamed ceramic side walls in the rail top air channel unit are oppositely arranged, and two sides of each foamed ceramic side wall in the width direction are respectively provided with a prefabricated bracket hanging column for bearing force; pre-embedded hanging ribs for fixedly connecting with a station structural slab are pre-embedded at the tops of the prefabricated bracket hanging columns; the lower end of one side surface of the prefabricated bracket hanging column is provided with a supporting connecting seat; the precast beam is arranged between the two side wall assemblies, and two ends of the precast beam are respectively supported and fixed on the support connecting seats on the corresponding sides; the foamed ceramic bottom plate is tiled on the precast beam.
Description
Technical Field
The invention relates to an assembled structure of a prefabricated rail top air duct of a subway station, in particular to an assembled structure of a prefabricated rail top air duct of the subway station based on foamed ceramics, and belongs to the technical field of subway station engineering.
Background
At present, the construction of a rail top air channel of a subway station mainly adopts cast-in-place reinforced concrete, and the cast-in-place reinforced concrete construction has the following problems: (1) The construction progress is slow, and a large amount of operations are all in comparatively narrow space in the underground, and the goods and materials are transported inconveniently, large-scale machinery can't use. (2) The operation quality can not be guaranteed, and phenomena such as elevation deviation, uneven surface, substandard concrete vibration quality and the like generally exist, and troubles are brought to later-period work. (3) The method has the advantages of poor economy, incapability of constructing the main structure together, casting of the structure per se in multiple times, small engineering quantity, high construction difficulty, high labor input and low efficiency. (4) The operation environment is dirty and messy, excessive underground wet operation is performed, the operation surface is narrow, the construction waste cannot be cleaned in time, and the dust is harmful to the health of operation personnel. And (5) endangering occupational health and safety. The dust in the dense space harms the health of operators, the working surface of the air channel on the top of the rail is narrow and has more protrusions, and workers are easily injured when crawling in the rail. Therefore, in the subway project engineering, the development and the application of the assembled component are promoted, the construction waste and the raised dust are reduced on site, and the quality, the safety, the environmental protection, the construction period progress, the economic benefit and the like are greatly improved.
Compared with the traditional cast-in-place construction technology, the assembly type technology is rapidly developed and popularized and applied in the field of subway station engineering by the advantages of rapidness, high efficiency, low energy consumption and the like. However, the conventional subway station fabricated rail top air duct is still prefabricated by adopting concrete whether being a rail top air duct unit with an integrally prefabricated concrete structure or a rail top air duct unit with a block prefabricated concrete structure, so that the concrete prefabrication consumes long time, the weight of the concrete prefabricated part is large, the installation difficulty is high during site construction, and potential safety hazards exist in construction; in addition, the hoisting of the concrete prefabricated member with larger weight is long in time consumption, and further improvement of the construction efficiency is also limited.
Therefore, a subway station rail top air duct assembly type structure which is light in weight, capable of saving materials and high in construction speed and a construction method thereof need to be designed.
The foamed ceramic building material overcomes the defects of low strength, combustibility and easy aging of the traditional heat insulation material, is a novel green heat insulation building material which has the characteristics of light weight, high strength, corrosion resistance, thin plastering, water and moisture resistance and A1-grade fireproof grade, is mainly prepared by firing various wastes, eliminates the problems of environmental pollution, land encroachment, vegetation damage and the like caused by waste accumulation, realizes the reutilization of resources, does not discharge wastes in the whole production process, and belongs to an environment-friendly process technology.
Disclosure of Invention
In view of the above, the invention provides a prefabricated rail top air duct assembly type structure based on foamed ceramics, the side walls and the bottom plate of the rail top air duct unit of the subway station are made of foamed ceramics, and on the premise of meeting the structural strength, the light weight of the rail top air duct unit of the subway station is realized, so that the installation and construction efficiency of the rail top air duct of the subway station can be greatly improved, the construction period is shortened, and the construction safety can be ensured.
The prefabricated rail top air channel assembly type structure based on the foamed ceramics comprises a plurality of rail top air channel units which are prefabricated in a split mode;
the rail top duct unit includes: the prefabricated bracket comprises foamed ceramic side walls, a foamed ceramic bottom plate, prefabricated bracket hanging columns and prefabricated beams;
the two foamed ceramic side walls are oppositely arranged, and two sides of each foamed ceramic side wall in the width direction are respectively provided with a prefabricated bracket hanging column for bearing force, so that a side wall assembly is formed; the top of the prefabricated bracket hanging column is embedded with an embedded hanging bar for fixedly connecting with a subway station structural slab;
the lower end of one side surface of the prefabricated bracket hanging column is provided with a supporting and connecting seat; the prefabricated beam is arranged between the two side wall assemblies, and two ends of the prefabricated beam are respectively supported and fixed on the support connecting seats of the prefabricated bracket hanging posts on the corresponding sides;
the foamed ceramic bottom plate is tiled on the precast beam.
As a preferred mode of the invention, diagonal bracing angle steel is arranged on the inner side and/or the outer side of the foamed ceramic side wall, and the diagonal bracing angle steel is arranged along the diagonal line of the foamed ceramic side wall;
when the inner side and the outer side of the foamed ceramic side wall are both provided with the inclined strut angle steel, the two inclined strut angle steels on the inner side and the outer side are arranged in a crossed mode.
As a preferred mode of the invention, the diagonal angle steel positioned at the outer side of the foamed ceramic side wall is fixedly connected with the foamed ceramic side wall through a fastener; and the diagonal angle steel positioned on the inner side of the foamed ceramic side wall is fixedly connected with the foamed ceramic side wall and the prefabricated bracket hanging column at the corresponding end through fasteners respectively.
As a preferred mode of the invention, the precast beam comprises two longitudinal beams and a plurality of cross beams for connecting the two longitudinal beams, and the two longitudinal beams are respectively connected with two precast corbel hanging posts in the side wall assembly.
As a preferred mode of the invention, a tongue-and-groove splicing structure is adopted between the foamed ceramic side wall and the prefabricated bracket hanging post.
As a preferred mode of the invention, a gap of 5-10 mm is reserved between the hanging column rabbet of the prefabricated bracket hanging column and the foamed ceramic side wall, and the gap is filled with grouting material.
As a preferred mode of the invention, two ends of a longitudinal beam in the precast beam are provided with precast beam groove holes, and a support connecting seat of the precast corbel hanging column is correspondingly provided with a corbel groove hole; after the precast beam groove holes are in butt joint with the bracket groove holes, the precast bracket hanging columns are spliced with the precast beams through bolts arranged in the two groove holes.
As a preferable mode of the invention, grouting materials are filled in the groove holes of the precast beams and the bracket grooves provided with the bolts for grouting and sealing.
As a preferred mode of the invention, a gap of 5-10 mm is formed between the two ends of the foamed ceramic baseplate and the side wall components on the corresponding sides, and grouting materials are filled in the gap.
In addition, the invention provides a construction method of a prefabricated rail top air channel assembly type structure based on foamed ceramics, which comprises the following steps:
firstly, pre-assembling an air duct unit at the top of a rail on the ground, wherein during pre-assembling, four prefabricated bracket hanging columns are hoisted to set positions; then manually installing two foamed ceramic side walls;
then hoisting the precast beam between two oppositely arranged side wall assemblies, supporting and fixing the precast beam on a supporting and connecting seat of the precast corbel hanging column on the corresponding side, and manually paving the foamed ceramic bottom plate on the precast beam; thus completing the pre-assembly of the rail top air duct unit;
after the pre-assembled rail top air duct unit is integrally hoisted to the installation position, pre-embedded hoisting ribs pre-embedded at the top of the prefabricated bracket hoisting column penetrate through groove holes pre-arranged on a subway station structural slab and are fixedly connected by bolts; and then grouting and filling joints at the joints of the prefabricated bracket hanging columns and the lower plate surface of the structural slab of the subway station.
Has the advantages that:
(1) The assembled structure of the rail top air channel adopts a block prefabricated structure, and the side wall assembly and the bottom assembly adopt prefabricated bracket hanging posts and prefabricated beams as main bearing structures and are matched with the foamed ceramic side wall and the foamed ceramic bottom plate, so that the consumption of concrete can be reduced as much as possible on the premise of meeting the structural strength; compared with the traditional concrete hanging wall and concrete bottom plate, the prefabricated bracket hanging column and the prefabricated beam have light weight and are convenient to hoist on site; the foamed ceramic material has high strength, light weight and good durability, when the foamed ceramic side wall and the foamed ceramic bottom plate are installed on site, hoisting is not needed, manual installation is only needed, and the site installation operation and site connection are convenient and maintenance is also convenient; therefore, the prefabricated rail top air channel assembly type structure based on the foamed ceramics realizes the light weight of the rail top air channel unit, so that the installation and construction efficiency of the rail top air channel of the subway station can be greatly improved, the construction period is shortened, and the construction safety can be ensured; meanwhile, because the consumption of concrete is greatly reduced, the construction of the subway station rail top air channel is carried out by adopting novel green environment-friendly foamed ceramics, and the resource consumption and the environmental pollution can be reduced.
(2) In the rail top air duct assembly type structure, the bottom plate assembly is of a light weight structure, and the bottom plate assembly and the side wall assembly are connected only through simple fasteners (such as bolts), so that the joint connection mode can be simplified, and the construction efficiency is improved.
(3) In the rail top air duct assembly type structure, the bottom of the foamed ceramic bottom plate is supported by the precast beam, so that the structural strength of the foamed ceramic bottom plate is improved.
(4) In the rail top air duct assembly type structure, the inclined strut angle steel is arranged on the inner side and/or the outer side of the foamed ceramic side wall and arranged along the diagonal line of the foamed ceramic side wall, so that the structural strength of the foamed ceramic side wall can be improved.
(5) In the rail top air duct assembly type structure, the foamed ceramic side wall is connected with the prefabricated bracket hanging post through the hanging post tongue-and-groove, and the tongue-and-groove type splicing structure can improve the splicing quality of the rail top air duct unit, effectively prevent the rail top air duct from leaking air and improve the assembling reliability and the assembling efficiency.
(6) In the rail top air duct assembly type structure, a gap is reserved between the hanging column tongue-and-groove and the foamed ceramic side wall, grouting materials are filled in the gap through the grouting pipe, and fault tolerance is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic overall structural diagram of a rail-top air duct unit according to an embodiment of the present invention;
FIG. 2 is an exploded view of a rail top duct unit provided in accordance with an embodiment of the present invention;
fig. 3 is a schematic structural view of a precast beam according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a grooved and tongued prefabricated bracket hanging pillar provided by an embodiment of the present invention;
fig. 5 is a schematic structural view of fixing the foamed ceramic side wall, the prefabricated bracket hanging post and the diagonal bracing angle steel provided by the embodiment of the invention.
Wherein: 1-precast beam, 2-diagonal angle steel, 3-precast corbel hanging post, 4-foamed ceramic side wall, 5-foamed ceramic bottom plate, 6-precast beam groove hole, 7-hanging post tongue and groove, 8-corbel groove hole, 9-embedded hanging rib and 10-bolt.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 1:
the embodiment provides a prefabricated rail top wind channel assembled structure based on foamed ceramics, adopts green's foamed ceramics prefabricated subway station rail top wind channel unit's side wall and bottom plate to make it can be under the prerequisite that satisfies structural strength through the improvement to the structure, the concrete volume of minimizing realizes lightweight, the low carbonization of whole subway station rail top wind channel assembled structure.
The prefabricated rail top air duct assembly type structure comprises a plurality of rail top air duct units prefabricated in a split mode; as shown in fig. 1 and 2, the rail head duct unit includes: the prefabricated bracket comprises two foamed ceramic side walls 4, a foamed ceramic bottom plate 5, a prefabricated bracket hanging column 3 and a prefabricated beam 1; the foamed ceramic side wall 4 and the foamed ceramic bottom plate 5 are cut according to the size in a factory, and the prefabricated bracket hanging column 3 and the prefabricated beam 1 are main bearing parts and are prefabricated and molded by adopting concrete; and the foamed ceramic side wall 4, the foamed ceramic bottom plate 5, the prefabricated bracket hanging post 3 and the prefabricated beam 1 are delivered to the site and then assembled. The foamed ceramic side wall 4 and the foamed ceramic bottom plate 5 are made of novel environment-friendly foamed ceramic materials, and have higher application value for quality control and follow-up maintenance and replacement of the rail top air channel unit.
The two foamed ceramic side walls 4 are oppositely arranged, and two sides of each foamed ceramic side wall 4 in the width direction are respectively provided with a prefabricated bracket hanging column 3 for bearing force, so that a side wall assembly is formed; and a tongue-and-groove type splicing structure is adopted between the foamed ceramic side wall 4 and the prefabricated bracket hanging column 3. As shown in fig. 4, in this example, the opposite surfaces of two prefabricated bracket hanging posts 3 in the side wall assembly are provided with hanging post grooves 7, and when the side wall assembly is installed, the two lateral sides of the foamed ceramic side wall 4 are directly placed in the hanging post grooves 7 on the corresponding side. After the rail top air channel unit is installed, a gap is reserved between the hanging column rabbet 7 and the foamed ceramic side wall 4, the gap is 5-10 mm, grouting materials are filled in the gap through a grouting pipe, the fault tolerance rate is guaranteed, the splicing quality of the rail top air channel unit can be improved through the rabbet type splicing structure, air leakage of the rail top air channel can be effectively prevented, and the assembling reliability and the assembling efficiency are improved.
As shown in fig. 4, the top of the prefabricated bracket davit 3 is pre-embedded with an embedded lifting bar 9 for fixedly connecting with cast-in-place concrete of a structural slab of a subway station; after the prefabricated bracket hanging column 3 is hoisted in place, the embedded hanging ribs 9 at the top of the prefabricated bracket hanging column penetrate through groove holes of a structural slab of a subway station and are fixedly connected by bolts; then utilize the slip casting pipe to carry out the slip casting processing of caulking at the junction of prefabricated bracket davit 3 and subway station structural slab lower plate face, the holing in advance of subway station structural slab has guaranteed the integrality and the stability of pre-buried hanger bar 9, has improved the factor of safety of rail top wind channel unit, has guaranteed the good of leakproofness simultaneously.
The lower end of one side surface of the prefabricated bracket hanging column 3 is provided with a bulge serving as a supporting and connecting seat of the prefabricated beam 1; the supporting and connecting seats of the prefabricated bracket hanging columns 3 in the two side wall assemblies are oppositely arranged, so that the two ends of the prefabricated beam 1 are respectively supported and fixed on the supporting and connecting seats of the prefabricated bracket hanging columns 3 on the corresponding sides. Two ends of a longitudinal beam in the prefabricated beam 1 are provided with prefabricated beam groove holes 6, and bracket groove holes 8 are correspondingly arranged on the support connecting seats of the prefabricated bracket hanging columns 3; after the bracket groove holes 8 and the precast beam groove holes 6 are in up-and-down butt joint, the precast bracket hanging posts 3 and the precast beams 1 are spliced together through bolts arranged in the two groove holes, then grouting materials are poured into gaps of the two groove holes, and the bolts are wrapped in the grouting materials, so that the strength and the flatness of connecting parts are guaranteed. The prefabricated beam 1 and the prefabricated bracket hanging column 3 are connected to form a main bearing structure of the rail top air duct unit.
The foamed ceramic bottom plate 5 is laid on the precast beam 1, so that a bottom plate assembly is formed; a gap of 5-10 mm is formed between each of two ends of the foamed ceramic bottom plate 5 and the corresponding side wall assembly, grouting materials are poured in the gap through grouting pipes, fault tolerance rate is improved, integrity of the rail top air channel unit is guaranteed, and air leakage is avoided.
As shown in fig. 5, in order to improve the structural strength of the side wall assembly, diagonal brace angles 2 are arranged on the inner side and the outer side of the foamed ceramic side wall 4, the diagonal brace angles 2 are arranged along a diagonal line of the foamed ceramic side wall 4, and the diagonal brace angles 2 on the inner side and the outer side of each foamed ceramic side wall 4 are arranged in a crossed manner. As shown in fig. 5, in this example, the diagonal angle 2 located outside the foamed ceramic side wall 4 is fixed to the foamed ceramic side wall 4 through two bolts 10, the diagonal angle 2 located inside the foamed ceramic side wall 4 is fixed through four bolts 10, wherein the two bolts 10 located at two sides are respectively fixed to the prefabricated bracket hanging posts 3 at the corresponding sides, and the two bolts 10 located in the middle are fixed to the foamed ceramic side wall 4, so that the stability of the foamed ceramic side wall 4 is ensured, and the shear strength and the connection force of the foamed ceramic side wall 4 are further improved.
Example 2:
the embodiment provides a construction method of the prefabricated rail top air duct fabricated structure in the embodiment 1.
Firstly, pre-assembling a rail top air duct unit on the ground, wherein four prefabricated bracket hanging columns 3 are hoisted to a set position in the pre-assembling process; then, manually installing two foamed ceramic side walls 4, and fixing inclined strut angle steel 2 on the inner side and the outer side of each foamed ceramic side wall 4 through bolts 10, thereby completing the assembly of the side wall assembly;
and then hoisting the precast beam 1 between two oppositely arranged side wall assemblies, and connecting the precast beam 1 with the precast bracket hanging posts 3 through bolts. And finally, manually paving the foamed ceramic bottom plate 5 on the precast beam 1.
And then grouting and sealing the connection nodes, namely pouring grouting material between the gaps of the foamed ceramic side wall 4 and the hanging column rabbet 7 of the prefabricated bracket hanging column 3 for sealing, pouring grouting material in the gap of the groove hole formed by splicing the prefabricated beam 1 and the prefabricated bracket hanging column 3 through bolts for sealing, and pouring grouting material in the gap between the foamed ceramic bottom plate 5 and the foamed ceramic side wall 4 for sealing.
Thus completing the pre-assembly of the rail top air duct unit.
After the pre-assembled rail top air channel unit is integrally hoisted to the installation position, pre-embedded hanging ribs 9 pre-embedded at the top of the prefabricated bracket hanging column 3 penetrate through preset groove holes in a subway station structural plate and are fixedly connected by bolts, and then grouting and gap filling treatment is carried out at the connection position of the prefabricated bracket hanging column 3 and the lower plate surface of the subway station structural plate by using a grouting pipe.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the invention. Accordingly, it is intended that all such modifications and alterations be included within the scope of this invention as defined in the appended claims.
Claims (10)
1. Prefabricated rail top wind channel assembled structure based on foamed ceramic, its characterized in that: the device comprises a plurality of split prefabricated rail top air channel units;
the rail head duct unit includes: the prefabricated bracket comprises a foamed ceramic side wall, a foamed ceramic bottom plate, prefabricated bracket hanging columns and prefabricated beams;
the two foamed ceramic side walls are oppositely arranged, and two sides of each foamed ceramic side wall in the width direction are respectively provided with a prefabricated bracket hanging column for bearing force, so that a side wall assembly is formed; pre-buried hanging bars used for being fixedly connected with a structural slab of a subway station are pre-buried at the tops of the prefabricated bracket hanging columns;
the lower end of one side surface of the prefabricated bracket hanging column is provided with a supporting and connecting seat; the prefabricated beam is arranged between the two side wall assemblies, and two ends of the prefabricated beam are respectively supported and fixed on the support connecting seats of the prefabricated bracket hanging columns on the corresponding sides;
the foamed ceramic bottom plate is tiled on the precast beam.
2. The pre-fabricated rail-top duct fabricated structure based on foamed ceramics of claim 1, wherein: inclined strut angle steel is arranged on the inner side and/or the outer side of the foamed ceramic side wall, and the inclined strut angle steel is arranged along the diagonal line of the foamed ceramic side wall;
when the inner side and the outer side of the foamed ceramic side wall are both provided with the inclined strut angle steel, the two inclined strut angle steels on the inner side and the outer side are arranged in a crossed manner.
3. The pre-fabricated rail-top duct fabricated structure based on foamed ceramics of claim 2, wherein: the diagonal angle steel positioned on the outer side of the foamed ceramic side wall is fixedly connected with the foamed ceramic side wall through a fastener; and the diagonal angle steel positioned on the inner side of the foamed ceramic side wall is fixedly connected with the foamed ceramic side wall and the prefabricated bracket hanging column at the corresponding end through fasteners respectively.
4. The pre-fabricated rail-top duct fabricated structure based on foamed ceramics of claim 1, wherein: the precast beam comprises two longitudinal beams and a plurality of cross beams used for connecting the two longitudinal beams, and the two longitudinal beams are respectively connected with two precast bracket hanging columns in the side wall assembly.
5. The pre-fabricated rail-top duct fabricated structure based on foamed ceramics of any one of claims 1 to 4, wherein: and a tongue-and-groove type splicing structure is adopted between the foamed ceramic side wall and the prefabricated bracket hanging post.
6. The pre-fabricated rail-top-duct fabricated structure based on foamed ceramics of claim 5, wherein: and a gap of 5-10 mm is reserved between the hanging column tongue-and-groove of the prefabricated bracket hanging column and the foamed ceramic side wall, and the gap is filled with grouting material.
7. The pre-fabricated rail-top duct fabricated structure based on foamed ceramics of claim 4, wherein: two ends of a longitudinal beam in the precast beam are provided with precast beam groove holes, and bracket groove holes are correspondingly arranged on the support connecting seats of the precast bracket hanging columns; after the precast beam groove holes are in butt joint with the bracket groove holes, the precast bracket hanging columns are spliced with the precast beams through bolts arranged in the two groove holes.
8. The pre-fabricated rail-top duct fabricated structure based on foamed ceramics of claim 7, wherein: and filling grouting materials into the groove holes of the precast beams and the bracket grooves provided with the bolts for grouting and sealing.
9. The pre-fabricated rail-top duct fabricated structure based on foamed ceramics of any one of claims 1 to 4, wherein: and a gap of 5-10 mm is formed between the two ends of the foamed ceramic bottom plate and the side wall components on the corresponding sides, and grouting materials are filled in the gap.
10. The construction method of the prefabricated rail top air duct assembly type structure based on the foamed ceramics is characterized by comprising the following steps of: the prefabricated rail top air duct fabricated structure is the prefabricated rail top air duct fabricated structure based on the foamed ceramics of any one of claims 1 to 9;
firstly, pre-assembling a rail top air duct unit on the ground, wherein four prefabricated bracket hanging columns are hoisted to set positions in the pre-assembling process; then manually installing two foamed ceramic side walls;
then hoisting the precast beam between two oppositely arranged side wall assemblies, supporting and fixing the precast beam on a supporting and connecting seat of the precast corbel hanging column on the corresponding side, and manually paving the foamed ceramic bottom plate on the precast beam; thus completing the pre-assembly of the rail top air duct unit;
after the pre-assembled rail top air duct unit is integrally hoisted to the installation position, pre-embedded hoisting ribs pre-embedded at the top of the prefabricated bracket hoisting column penetrate through groove holes pre-arranged on a subway station structural slab and are fixedly connected by bolts; and then grouting and filling joints at the joints of the prefabricated bracket davits and the lower plate surface of the structural slab of the subway station.
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| CN214615228U (en) * | 2021-02-05 | 2021-11-05 | 重庆市轨道交通设计研究院有限责任公司 | Block assembled rail top air duct for underground station |
| CN216405479U (en) * | 2021-12-07 | 2022-04-29 | 中建隧道建设有限公司 | Subway station antidetonation assembled reinforced concrete rail top wind channel structure |
| CN114230368A (en) * | 2022-01-13 | 2022-03-25 | 崔耀春 | Exterior wall thermal insulation material for building and preparation method thereof |
| CN114718270A (en) * | 2022-04-29 | 2022-07-08 | 广州市第一装修有限公司 | Assembled foamed ceramic outer wall and assembling method thereof |
| CN114991845A (en) * | 2022-07-04 | 2022-09-02 | 中建六局(天津)绿色建筑科技有限公司 | Assembled installation system of prefabricated rail top air duct in underground space |
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| CN115853570B (en) | 2023-06-02 |
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