CN112030626A - Prefabricated rail top air duct unit, rail top air duct installation structure and construction method thereof - Google Patents
Prefabricated rail top air duct unit, rail top air duct installation structure and construction method thereof Download PDFInfo
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- CN112030626A CN112030626A CN202010711647.0A CN202010711647A CN112030626A CN 112030626 A CN112030626 A CN 112030626A CN 202010711647 A CN202010711647 A CN 202010711647A CN 112030626 A CN112030626 A CN 112030626A
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- air duct
- plate
- rail top
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B26/00—Tracks or track components not covered by any one of the preceding groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B1/00—General arrangement of stations, platforms, or sidings; Railway networks; Rail vehicle marshalling systems
- B61B1/02—General arrangement of stations and platforms including protection devices for the passengers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/0245—Manufacturing or assembly of air ducts; Methods therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/0254—Ducting arrangements characterised by their mounting means, e.g. supports
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a prefabricated rail top air duct unit, wherein an air duct top plate, an air duct bottom plate and two air duct side plates are combined into an integrated prefabricated box type structure, and two transverse ends of the air duct top plate are respectively provided with lateral embedded ribs for connecting with air duct reinforcing ribs on a middle plate of a station. The prefabricated rail top air channel units are adopted by each air channel unit of the rail top air channel, the air channel reinforcing bars of the station middle plate are connected with the side embedded ribs in a one-to-one correspondence mode, and the air channel top plate is at least partially embedded into the station middle plate. The integrally prefabricated box structure can avoid the problems in the construction of a cast-in-place rail top air channel, and the strength of the integral structure is obviously superior to that of a conventional U-shaped air channel unit; the air duct top plate is at least partially built into the station middle plate, the air duct top plate and the station middle plate have better cooperative stress performance, and the reliability and the stability of the connection structure of the rail top air duct and the station middle plate can be obviously improved, so that the operation safety of the rail top air duct is higher.
Description
Technical Field
The invention belongs to the technical field of rail traffic engineering, and particularly relates to a prefabricated rail top air duct unit, a mounting structure of a rail top air duct and a construction method of the mounting structure.
Background
The rail top air duct is an important component of a rail transit station, and currently, two modes of cast-in-place construction and prefabrication construction are mainly adopted.
The problems existing in the construction of a cast-in-place rail top air duct are as follows:
(1) the rail top air duct is positioned below the middle plate of the subway station and above the rail, is a secondary structure of the station, and is difficult to support a template in the synchronous construction with a complex shape. If for later stage construction, the scaffold of erectting the medium plate all has been demolishd, needs to set up scaffold and template again, wastes time and energy and takes money.
(2) The rail top air channel utilizes the middle plate to reserve the reinforcing bar and suspends in midair below the middle plate, and rail top air channel space is narrow and small, and there is very big degree of difficulty in reinforcement and concrete placement etc. and construction quality is difficult to obtain guaranteeing, seepage water and quality hidden danger ubiquitous.
The problems existing in the construction of the prefabricated rail top air duct are as follows: at present, a prefabricated rail top air duct is mostly in a U shape and is connected with a station middle plate through a lifting hook and the like, and the problems of insufficient reliability and durability of a connecting node exist; the sealing performance of the joint of the U-shaped rail top air duct and the middle plate is not easy to guarantee, and air leakage is easy to occur; meanwhile, the embedded parts or holes embedded in the middle plate of the station inevitably weaken the rigidity of the middle plate, and the middle plate is stressed unfavorably, which is also the reason why the prefabricated rail top air duct is not applied on site at present.
Disclosure of Invention
The invention relates to a prefabricated rail top air duct unit, a mounting structure of a rail top air duct and a construction method thereof, which can at least solve part of defects in the prior art.
The invention relates to a prefabricated rail top air duct unit which comprises an air duct top plate, an air duct bottom plate and two air duct side plates, wherein the air duct top plate, the air duct bottom plate and the two air duct side plates are combined into an integrated prefabricated box structure, and two transverse ends of the air duct top plate are respectively provided with lateral pre-embedded ribs for connecting with air duct reinforcing ribs on a station middle plate.
In one embodiment, the top of the air duct top plate is embedded with top embedded ribs for being solidified with cast-in-place concrete of the station middle plate.
In one embodiment, the top embedded rib is a triangular rib.
In one embodiment, the duct bottom panel and/or the duct side panel have a hollow cavity.
As one embodiment, when the air duct side plate has a side plate hollow cavity, a cast-in-place channel for cast-in-place concrete to enter is arranged on the air duct top plate, and the cast-in-place channel is communicated with the side plate hollow cavity;
when the air duct bottom plate is provided with a bottom plate hollow cavity and the air duct side plate is provided with a side plate hollow cavity, the side plate hollow cavity is communicated with the bottom plate hollow cavity.
As one embodiment, the air duct bottom plate is provided with an air exhaust hole; and/or, a smoke exhaust hole is arranged on at least one air duct side plate.
As one embodiment, a catenary suspension bracket is pre-embedded on the air duct bottom plate; and/or the air duct side plate on the corresponding side extends downwards to form an ear part, and a shield door mounting piece is pre-buried on the ear part.
As one embodiment, two ends of the prefabricated rail top air duct unit are respectively provided with an assembly structure for being assembled with an adjacent air duct unit, and the assembly structure is arranged on at least one of the air duct top plate, the air duct bottom plate and the air duct side plate.
As one embodiment, the assembling structure of one end of the prefabricated rail-top air duct unit includes a tenon portion formed on the corresponding plate body, and the assembling structure of the other end of the prefabricated rail-top air duct unit includes a groove portion formed on the corresponding plate body.
The invention also relates to an installation structure of the rail top air channel, wherein the rail top air channel comprises a plurality of air channel units which are sequentially spliced, each air channel unit is installed on the station middle plate, each air channel unit adopts the prefabricated rail top air channel unit, the station middle plate is a cast-in-place middle plate and is provided with a plurality of air channel reinforcing bars, the air channel reinforcing bars are respectively connected with the side embedded bars in a one-to-one correspondence mode, and the air channel top plate is at least partially embedded into the station middle plate.
The invention also relates to a construction method of the mounting structure, which comprises the following steps:
prefabricating and producing each prefabricated rail top air duct unit under the line;
lifting each prefabricated rail top air channel unit to a preset position, and splicing each prefabricated rail top air channel unit to form a rail top air channel;
installing a middle plate template, and finishing the binding of middle plate reinforcing bars, wherein each air duct reinforcing bar is correspondingly connected with each lateral embedded bar one by one;
and pouring the middle plate concrete to combine the middle plate and the rail top air duct into an integral structure.
As an embodiment, the construction method further includes: when two adjacent prefabricated rail top air duct units are spliced, grouting pipes are embedded at the joints of the two prefabricated rail top air duct units; and after the station middle plate and the rail top air channel are combined into an integral structure, cement slurry is injected into the grouting pipe to fill the joint between two adjacent prefabricated rail top air channel units.
The invention has at least the following beneficial effects:
the invention adopts an integrally prefabricated box type structure, which can avoid the problems existing in the construction of a cast-in-place rail top air channel; the integral structural strength of the air duct unit is obviously superior to that of a conventional U-shaped air duct unit, the reliability and durability of the rail top air duct can be ensured, and the rail top air duct is more convenient to transport and hoist; the box-shaped air duct unit has good circumferential tightness, and can avoid the air leakage phenomenon at the contact position of the prefabricated part and the middle plate. The air duct unit is connected with the station middle plate through the steel bars, so that the air duct top plate is at least partially built into the station middle plate and forms a part of the station middle plate, the air duct top plate and the station middle plate are better in stress performance in cooperation, the reliability and the stability of a connecting structure of the rail top air duct and the station middle plate can be remarkably improved, and the operation safety of the rail top air duct is higher.
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. 1-3 are schematic structural diagrams of a prefabricated rail top air duct unit provided by an embodiment of the invention;
FIG. 4 is a schematic view of an installation structure of a rail top duct according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a tenon-and-mortise type splicing structure of two adjacent prefabricated rail top air duct units according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a prefabricated rail top air duct unit provided with a plug according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a prefabricated rail top air duct unit provided with a support head according to an embodiment of the present invention;
fig. 8 is a schematic view illustrating an installation state of the prefabricated rail air duct unit according to the embodiment of the invention.
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 one
As shown in fig. 1 to 4, an embodiment of the present invention provides a prefabricated rail top air duct unit 1, which includes an air duct top plate 11, an air duct bottom plate 13, and two air duct side plates 12, where the air duct top plate 11, the air duct bottom plate 13, and the two air duct side plates 12 are combined into an integrated prefabricated box structure, and two lateral ends of the air duct top plate 11 are respectively provided with lateral pre-embedded ribs 111 for connecting with air duct ribs on a station middle plate 2.
The air duct top plate 11, the air duct bottom plate 13 and the two air duct side plates 12 are integrally prefabricated and formed under the line, and the specific prefabricating mode is easily determined by a person skilled in the art and is not described herein again.
It will be understood that the longitudinal direction of the tunnel roof 11 is parallel to the longitudinal direction of the tunnel or the longitudinal direction of the rails, and the transverse direction of the tunnel roof 11 is parallel to the transverse direction of the tunnel or perpendicular to the longitudinal direction of the rails.
The transverse end of each side is preferably provided with a plurality of lateral embedded ribs 111, and the lateral embedded ribs 111 of each side are sequentially arranged at intervals along the longitudinal direction of the air duct. Of course, each lateral embedded rib 111 on each side can also be arranged in a multi-row distribution manner, each rib row is sequentially arranged from bottom to top, and each rib row comprises a plurality of lateral embedded ribs 111 which are sequentially arranged at intervals along the longitudinal direction of the air duct.
The lateral embedded ribs 111 and the air duct reinforcing bars on the station middle plate 2 can be welded, and can also be connected by adopting a reinforcing bar connector 3 and the like. Preferably, the reinforcing bar connector 3 is arranged on the side embedded bar 111, so that the efficiency of connecting the reinforcing bar connector with the air duct reinforcing bar can be improved.
The prefabricated rail top air channel unit 1 provided by the embodiment adopts an integrally prefabricated box type structure, so that the problems existing in cast-in-place rail top air channel construction can be avoided; the integral structural strength of the air duct unit 1 is obviously superior to that of the conventional U-shaped air duct unit 1, the reliability and durability of the rail top air duct can be ensured, and the rail top air duct is more convenient to transport and hoist; the box-shaped air duct unit 1 has good circumferential tightness, and can avoid the air leakage phenomenon at the contact position of the prefabricated member and the middle plate. Air duct unit 1 passes through the steel bar connection with station medium plate 2 to air duct roof 11 builds into station medium plate 2 at least partially in, constitutes for the partly of station medium plate 2, and the two atress performance preferred in coordination can show the connection structure reliability and the stability that improves rail top air duct and station medium plate 2, therefore the operation security in rail top air duct is higher.
Obviously, when the middle plate 2 of the station is poured, the lateral embedded ribs 111 are wrapped and consolidated by the cast-in-place concrete of the middle plate, so that the durability is good; and need not to carry out operations such as trompil or pre-buried component on station medium plate 2, can guarantee the structural rigidity and the atress performance of station medium plate 2.
Further preferably, as shown in fig. 1 to 4, a top pre-embedded rib 112 for being solidified with cast-in-place concrete of the station middle plate 2 is embedded in the top of the air duct top plate 11, so that the cooperative stress between the air duct unit 1 and the station middle plate 2 and the reliability and stability of the connection structure between the air duct unit 1 and the station middle plate 2 can be further improved. In one embodiment, the top embedded rib 112 is a triangular rib, which has a good engagement effect with the cast-in-place concrete of the middle slab. The top embedded ribs 112 are preferably a plurality of, and more preferably arranged in a multi-row distribution manner, each rib row is sequentially arranged along the longitudinal direction of the air duct, and each rib row comprises a plurality of top embedded ribs 112 which are sequentially arranged along the transverse direction of the air duct at intervals.
The structure of the prefabricated rail top air duct unit 1 is further optimized, as shown in fig. 1-3, the air duct bottom plate 13 and/or the air duct side plate 12 are/is provided with hollow cavities, so that the self weight of the air duct unit 1 can be reduced on the premise that the structural performance of the air duct unit 1 meets the requirements, and the operations such as transportation, hoisting and the like are facilitated. Alternatively, the duct top plate 11 may have a hollow structure.
Further preferably, when the air duct side plate 12 has a side plate hollow cavity 121, a cast-in-place channel for cast-in-place concrete to enter is arranged on the air duct top plate 11, and the cast-in-place channel is communicated with the side plate hollow cavity 121; the cast-in-place passageway may be a relatively large cast-in-place hole (e.g., having the same cross-section as the cavity 121 in the side panel), or may be a plurality of relatively small cast-in-place holes. When the station middle plate 2 is poured, cast-in-place concrete enters the hollow cavity 121 of the side plate through the cast-in-place channel, and structural integrity and cooperative stress of the air duct unit 1 and the station middle plate 2 are further improved. When the air duct bottom plate 13 has a bottom plate hollow cavity 131 and the air duct side plate 12 has a side plate hollow cavity 121, the side plate hollow cavity 121 is communicated with the bottom plate hollow cavity 131, and when the middle plate 2 in the station is poured, cast-in-place concrete also enters the bottom plate hollow cavity 131.
The structure of the prefabricated rail top air duct unit 1 is further optimized, as shown in fig. 2, an air exhaust hole 17 is formed in the air duct bottom plate 13, and therefore air exhaust and heat exhaust are facilitated during later train operation; and/or, as shown in fig. 3, smoke exhaust holes 18 are formed in at least one of the air duct side plates 12, so that smoke can be rapidly exhausted from the station through the smoke exhaust holes 18 in case of a fire in the station. The smoke exhaust holes 18 preferably penetrate through two longitudinal ends of the air duct side plates 12, and when the air duct units 1 are spliced into the rail top air duct, a smoke exhaust fan can conveniently suck and exhaust smoke from one end of the rail top air duct; optionally, a suction channel communicated with the smoke discharge hole 18 may be formed on the duct bottom plate 13 to improve the smoke discharge efficiency.
The structure of the prefabricated rail top air duct unit 1 is further optimized, as shown in fig. 1, a contact net suspension frame 16 is pre-embedded in the air duct bottom plate 13, so that the contact net can be conveniently suspended in the later period, and the unreliability of anchor bolts in the later period and the weakening of the structural strength of the rail top air duct are avoided; and/or, as shown in fig. 1-4, the air duct side plate 12 on the corresponding side extends downwards to form an ear part, and a shield door mounting part 15 is pre-embedded on the ear part, so that the installation of the shield door in the later period is facilitated, and the unreliability of an anchor bolt in the later period and the weakening of the structural strength of the rail top air duct are avoided.
It can be understood that the rail-top air duct is assembled by a plurality of air duct units 1, and the air duct unit is prefabricated and installed in sections, so that the rail-top air duct is convenient to produce, transport and install. Correspondingly, as shown in fig. 1-3 and fig. 5, two ends of the prefabricated rail top air duct unit 1 are respectively provided with an assembling structure 14 for assembling with an adjacent air duct unit 1, and the assembling structure 14 is arranged on at least one of the air duct top plate 11, the air duct bottom plate 13 and the air duct side plate 12; through the assembly structure 14, the alignment splicing between two adjacent air duct units 1 is facilitated, and the splicing efficiency is improved. The air duct top plate 11, the air duct bottom plate 13 and the air duct side plate 12 may be respectively provided with the assembling structure 14, and of course, the assembling structure 14 may be provided only on one or a plurality of plate bodies, and the assembling structure is selected according to specific installation conditions and requirements.
In one embodiment, as shown in fig. 5, the mounting structure 14 at one end of the prefabricated rail-top air duct unit 1 comprises a tenon portion 141 formed on the corresponding plate body, and the mounting structure 14 at the other end of the prefabricated rail-top air duct unit 1 comprises a groove portion 142 formed on the corresponding plate body. When two adjacent air duct units 1 are spliced, the tenon part 141 of one air duct unit 1 is correspondingly embedded into the groove part 142 of the other air duct unit 1; alternatively, the tenon 141 has a hexagonal cross-section.
In another embodiment, the mounting structure 14 is a latch-type structure, and specifically, as shown in fig. 6 and 7, the mounting structure 14 at one end of the prefabricated rail-top air duct unit 1 includes a socket 144 formed on the corresponding plate body, and the mounting structure 14 at the other end of the prefabricated rail-top air duct unit 1 includes a plug 143 formed on the corresponding plate body. Further, as shown in fig. 6 and 7, a locking block 1431 is disposed on the plug 143, and a locking groove is disposed in the socket 144; an accommodating groove 1433 is concavely formed on the outer wall of the plug 143 towards the inner side, and a spring 1432 is arranged at the bottom of the accommodating groove 1433 to connect the locking block 1431, so that in the process of inserting the plug 143 into the socket 144, the locking block 1431 can be pressed into the accommodating groove 1433 and can be ejected to be inserted into the locking groove when the locking block runs to the locking groove, and the self-locking between the plug 143 and the socket 144 is realized.
Preferably, the locking block 1431 is located at an end of the plug 143, and the locking groove is correspondingly formed in the socket 144. Further preferably, as shown in fig. 6, the outer wall of the locking block 1431 is preferably a slope, so that when the plug 143 is plugged into the socket 144, the locking block 1431 can be pressed into the receiving groove 1433 by the inner wall of the socket 144; in one embodiment, the locking block 1431 may be wedge-shaped or right trapezoid-shaped. The locking groove can be a wedge-shaped groove or a trapezoid groove correspondingly, can also be a rectangular groove and the like, and can realize axial limit of the plug 143.
Particularly, in the structure that the air duct bottom plate 13 and/or the air duct side plate 12 have hollow cavities, taking as an example that the plug 143 and the socket 144 are disposed on the air duct side plate 12 and the air duct side plate 12 has the side plate hollow cavity 121, it is preferable that the socket 144 is disposed to communicate with the side plate hollow cavity 121, the side plate hollow cavity 121 can be configured as the locking groove, and when the plug 143 is plugged into the socket 144, the locking block 1431 enters the side plate hollow cavity 121; when the middle plate cast-in-place concrete enters the hollow cavity 121 of the side plate, the locking block 1431 is wrapped and fixed. Based on the scheme, the cast-in-place concrete can better fix the plug 143, prevent loosening and ensure the stability and reliability of the splicing structure between two adjacent air duct units 1; and the plug 143 of one of the air duct units 1 can be integrated with the cast-in-place concrete in the adjacent air duct unit 1, that is, the splicing member when the two adjacent air duct units 1 are spliced is integrated with the station middle plate 2, so that the cooperative stress of the air duct unit 1 and the station middle plate 2 is obviously improved.
Example two
The embodiment of the invention provides an installation structure of a rail top air duct, wherein the rail top air duct comprises a plurality of air duct units 1 which are sequentially spliced, each air duct unit 1 is installed on a middle plate 2 in a station, each air duct unit 1 adopts the prefabricated rail top air duct unit 1, and the specific structure of the prefabricated rail top air duct unit 1 is not repeated here. The station middle plate 2 is a cast-in-place middle plate and is provided with a plurality of air duct reinforcing bars, the air duct reinforcing bars are correspondingly connected with the side pre-embedded bars 111 one by one, and the air duct top plate 11 is at least partially embedded into the station middle plate 2.
For the splicing manner between two adjacent air duct units 1, it has been described in the first embodiment, and the details are not described here.
Further preferably, when the two adjacent air duct units 1 are aligned and spliced by adopting a tenon-and-mortise structure, the water stop strip 4 can be clamped between the tenon part 141 and the groove part 142; optionally, the water stop 4 is embedded in the bottom of the groove 142. In addition, a grouting pipe 5 can be embedded in a joint gap between two adjacent air duct units 1, and cement slurry is injected into the grouting pipe 5 to fill the joint between two adjacent prefabricated rail top air duct units 1 after the station middle plate 2 and the rail top air duct are combined into an integral structure. The structure can improve the waterproof performance and the sealing performance of the rail top air channel.
Further, still relate to the construction method of above-mentioned mounting structure in addition, include:
prefabricating and producing each prefabricated rail top air duct unit 1 under the line;
enabling each prefabricated rail top air channel unit 1 to rise to a preset position, and enabling each prefabricated rail top air channel unit 1 to be spliced to form a rail top air channel; preferably, as shown in fig. 8, the ascending method of the air duct unit 1 includes: a full framing scaffold 6 is erected below the station middle plate 2, the air channel unit 1 is transported to a construction site, and the air channel unit 1 is hoisted to a preset position above the framing scaffold 6 through a gantry crane and a hoisting cable 7;
installing a middle plate template, and finishing the binding of middle plate reinforcing bars, wherein each air duct reinforcing bar is correspondingly connected with each lateral embedded bar 111 one by one;
pouring the middle plate concrete to combine the middle plate 2 and the rail top air channel into an integral structure.
Further, the construction method further comprises the following steps: when two adjacent prefabricated rail top air duct units 1 are spliced, grouting pipes 5 are embedded in the joints of the two prefabricated rail top air duct units; after the station middle plate 2 and the rail top air channel are combined into an integral structure, cement slurry is injected into the grouting pipe 5 to fill the joint between two adjacent prefabricated rail top air channel units 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (12)
1. The utility model provides a prefabricated rail top wind channel unit which characterized in that: the air duct top plate, the air duct bottom plate and the two air duct side plates are combined into an integrated prefabricated box type structure, and lateral embedded ribs used for being connected with air duct reinforcing ribs on a station middle plate are arranged at two transverse ends of the air duct top plate respectively.
2. The pre-track head duct unit of claim 1, wherein: and top embedded ribs for being solidified with cast-in-place concrete of the station middle plate are also embedded in the top of the air duct top plate.
3. The pre-track head duct unit of claim 2, wherein: the top embedded rib is a triangular rib.
4. The pre-track head duct unit of claim 1, wherein: the air duct bottom plate and/or the air duct side plate are/is provided with a hollow cavity.
5. The pre-track head duct unit of claim 4, wherein: when the air duct side plate is provided with a side plate hollow cavity, a cast-in-place channel for cast-in-place concrete to enter is arranged on the air duct top plate, and the cast-in-place channel is communicated with the side plate hollow cavity;
when the air duct bottom plate is provided with a bottom plate hollow cavity and the air duct side plate is provided with a side plate hollow cavity, the side plate hollow cavity is communicated with the bottom plate hollow cavity.
6. The pre-track head duct unit of claim 1, wherein: an air exhaust hole is formed in the air duct bottom plate; and/or, a smoke exhaust hole is arranged on at least one air duct side plate.
7. The pre-track head duct unit of claim 1, wherein: a contact net suspension bracket is pre-embedded on the air duct bottom plate; and/or the air duct side plate on the corresponding side extends downwards to form an ear part, and a shield door mounting piece is pre-buried on the ear part.
8. The pre-track head duct unit of claim 1, wherein: and two ends of the prefabricated rail top air duct unit are respectively provided with an assembly structure for being assembled with the adjacent air duct units, and the assembly structures are arranged on at least one of the air duct top plate, the air duct bottom plate and the air duct side plates.
9. The pre-track head duct unit of claim 8, wherein: the assembling structure of one end of the prefabricated rail top air channel unit comprises a tenon portion formed on the corresponding plate body, and the assembling structure of the other end of the prefabricated rail top air channel unit comprises a groove portion formed on the corresponding plate body.
10. The utility model provides a mounting structure in rail top wind channel, rail top wind channel is including a plurality of wind channel units of concatenation in proper order, each the wind channel unit is all installed on the station medium plate, its characterized in that: the prefabricated rail top air duct unit as claimed in any one of claims 1 to 9 is adopted for each air duct unit, wherein the station middle plate is a cast-in-place middle plate and is provided with a plurality of air duct reinforcing bars, the air duct reinforcing bars are respectively connected with the side embedded bars in a one-to-one correspondence mode, and the air duct top plate is at least partially embedded into the station middle plate.
11. The construction method of the installation structure according to claim 10, comprising:
prefabricating and producing each prefabricated rail top air duct unit under the line;
lifting each prefabricated rail top air channel unit to a preset position, and splicing each prefabricated rail top air channel unit to form a rail top air channel;
installing a middle plate template, and finishing the binding of middle plate reinforcing bars, wherein each air duct reinforcing bar is correspondingly connected with each lateral embedded bar one by one;
and pouring the middle plate concrete to combine the middle plate and the rail top air duct into an integral structure.
12. The construction method according to claim 11, further comprising: when two adjacent prefabricated rail top air duct units are spliced, grouting pipes are embedded at the joints of the two prefabricated rail top air duct units; and after the station middle plate and the rail top air channel are combined into an integral structure, cement slurry is injected into the grouting pipe to fill the joint between two adjacent prefabricated rail top air channel units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010711647.0A CN112030626A (en) | 2020-07-22 | 2020-07-22 | Prefabricated rail top air duct unit, rail top air duct installation structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010711647.0A CN112030626A (en) | 2020-07-22 | 2020-07-22 | Prefabricated rail top air duct unit, rail top air duct installation structure and construction method thereof |
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| CN112030626A true CN112030626A (en) | 2020-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073874A (en) * | 2021-04-09 | 2021-07-06 | 中建八局天津建设工程有限公司 | Prefabricated air duct allowing people to pass through and construction method thereof |
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2020
- 2020-07-22 CN CN202010711647.0A patent/CN112030626A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073874A (en) * | 2021-04-09 | 2021-07-06 | 中建八局天津建设工程有限公司 | Prefabricated air duct allowing people to pass through and construction method thereof |
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