CN111535360A - Mounting method and mounting structure of rail top air duct - Google Patents
Mounting method and mounting structure of rail top air duct Download PDFInfo
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- CN111535360A CN111535360A CN202010291856.4A CN202010291856A CN111535360A CN 111535360 A CN111535360 A CN 111535360A CN 202010291856 A CN202010291856 A CN 202010291856A CN 111535360 A CN111535360 A CN 111535360A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005266 casting Methods 0.000 claims description 52
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 238000009434 installation Methods 0.000 claims description 22
- 238000011065 in-situ storage Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 26
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 238000004873 anchoring Methods 0.000 description 6
- 238000009415 formwork Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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- 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
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Abstract
The invention provides a mounting method and a mounting structure of a rail top air duct, wherein the method comprises the following steps: s0, prefabricating an air duct side plate and an air duct bottom plate, wherein a pouring groove is formed in the top of the air duct side plate; s1, lifting and positioning the air duct side plate on site to communicate the pouring groove of the air duct side plate with a pouring hole reserved on the middle plate of the station; s2, enabling cast-in-place concrete to enter a pouring groove of the air duct side plate through a pouring hole in the station middle plate, and enabling the air duct side plate and the station middle plate to be fixedly connected together; and S3, mounting the air duct bottom plate between the structure side wall and the air duct side plate. According to the invention, the air duct side plate and the station middle plate are fixedly integrated into a whole through cast-in-place concrete, so that the air duct side plate and the station middle plate are stressed cooperatively, and the stability and the reliability of the rail top air duct mounting structure can be obviously improved; need not to set up scaffold frame, template etc. and the construction is convenient, and construction speed is fast, efficient, practices thrift engineering time and cost effectively.
Description
Technical Field
The invention belongs to the technical field of rail traffic engineering, and particularly relates to a rail top air duct installation method and a rail top air duct installation structure.
Background
In subway station engineering, the middle plate above the station rail traveling region generally needs to be provided with a concrete rail top air duct. The method is limited by a cast-in-place process and shield starting, synchronous pouring of the rail top air channel and the station middle plate cannot be realized, and the rail top air channel is generally cast-in-place construction in a mode that the steel bars are reserved in the station middle plate and a scaffold is built in the station for the second time.
At present conventional construction mode is because the rail top wind channel adopts cast-in-place mode, and the concrete vibrating rod can only stretch into from medium plate preformed hole, and is not good to wind channel bottom plate concrete vibration effect. Meanwhile, in the implementation process, because a full framing scaffold support formwork needs to be built, pouring and tamping holes are reserved in the middle plate and are poured and molded twice, the construction period of an electromechanical system is seriously occupied, the templates are difficult to completely remove due to the fact that the internal space of the rail top air channel is narrow, and potential safety hazards of hitting a middle contact net or driving a train from the air holes after the templates fall off exist in the operation stage. In addition, the rail top air duct has larger structural section size due to the requirement of construction process, and compared with the engineering quantity, the measure cost and the resource consumption are too high, and the resource consumption ratio is high.
Disclosure of Invention
The invention relates to a method for installing a rail top air duct and an installation structure of the rail top air duct, which can at least solve part of defects in the prior art.
The invention relates to a method for installing a rail top air duct, which comprises the following steps:
s0, prefabricating an air duct side plate and an air duct bottom plate, wherein a pouring groove is formed in the top of the air duct side plate;
s1, lifting and positioning the air duct side plate on site to communicate the pouring groove of the air duct side plate with a pouring hole reserved on the middle plate of the station;
s2, enabling cast-in-place concrete to enter a pouring groove of the air duct side plate through a pouring hole in the station middle plate, and enabling the air duct side plate and the station middle plate to be fixedly connected together;
and S3, mounting the air duct bottom plate between the structure side wall and the air duct side plate.
As one embodiment, the station middle plate is a prefabricated member,
in the S0, prefabricating a station middle plate, wherein a pouring hole is reserved correspondingly when the station middle plate is prefabricated;
in S1, after the installation of the station middle plate is completed, the air duct side plate is lifted and positioned, wherein one end of the station middle plate is placed on the structure side wall.
As one embodiment, the station middle plate comprises a prefabricated main body middle plate and a cast-in-place middle plate laminated layer;
in S0, prefabricating a main body middle plate, wherein a pouring hole is reserved correspondingly when the main body middle plate is prefabricated;
in S1, after positioning and placing the middle plate of the main body, lifting and positioning the side plates of the air duct are carried out, wherein one end of the middle plate of the main body is placed on the side wall of the structure;
and S2, casting a middle plate superposed layer on the surface of the middle plate of the main body in situ, wherein the concrete enters the casting groove of the air duct side plate through the casting hole when the middle plate superposed layer is cast, so that the air duct side plate and the middle plate of the main body are fixedly connected together.
In one embodiment, the structural sidewall is a preform,
in S0, prefabricating the structural side wall;
in S1, positioning and mounting of the structural side walls are also performed.
As one embodiment, the method for positioning and installing the structural side wall includes:
the structure side wall is a hollow prefabricated part and is inserted into a hollow cavity of the structure side wall for positioning through a positioning steel bar reserved on the structure plate;
when the middle plate laminated layer is poured, concrete still enters the hollow cavity of the structure side wall, and the structure side wall, the main body middle plate and the structure plate are fixedly connected into an integral structure.
As one embodiment, a consolidated steel bar is reserved at the bottom of a middle plate in a station; and S1, when the air duct side plate is positioned, the consolidated steel bars at the bottom of the middle plate of the station extend into the pouring grooves of the air duct side plate.
As one embodiment, the structural side walls and the duct side plates are respectively provided with a support portion, and in S3, the duct bottom plate is lifted first, and then the duct bottom plate is horizontally pushed to the support portions placed at both sides.
The invention also relates to an installation structure of the rail top air channel, which comprises a station middle plate, air channel side plates, an air channel bottom plate and structure side walls, wherein the air channel side plates and the air channel bottom plate are prefabricated parts;
the top of the air duct side plate is provided with a pouring groove, the station middle plate is provided with a plurality of pouring holes communicated with the pouring groove, and the pouring holes and the pouring groove are filled with cast-in-place concrete so that the air duct side plate and the station middle plate are fixedly connected together;
the air duct bottom plate is arranged between the structure side wall and the air duct side plate.
In one embodiment, the station middle plate is further provided with a plurality of consolidation steel bars protruding out of the bottom of the station middle plate and extending into the pouring grooves below the station middle plate.
As one embodiment, the station middle plate comprises a prefabricated main body middle plate and a cast-in-place middle plate laminated layer;
one end of the main body middle plate is placed on the structure side wall and is reserved with the pouring hole;
the middle plate superposed layer covers the surface of the middle plate of the main body, and is a cast-in-place concrete layer and the cast-in-place concrete further fills the pouring hole and the pouring groove.
In one embodiment, the structural side wall is a prefabricated member and is positioned and installed on the structural plate.
As one embodiment, the structural side wall is a hollow prefabricated member, positioning steel bars are reserved on the structural plate, the positioning steel bars are inserted into a hollow cavity of the structural side wall, and cast-in-place concrete further fills the hollow cavity of the structural side wall to fixedly connect the structural side wall, the main body middle plate and the structural plate into an integrated structure.
As one embodiment, the structural side walls and the air duct side plates are respectively provided with a bearing part, and the air duct bottom plate is placed on the bearing parts at two sides.
The invention has at least the following beneficial effects:
according to the invention, the pouring groove is arranged at the top of the air duct side plate, after concrete is cast in the pouring groove from the pouring hole in the station middle plate, the reliable connection between the rail top air duct and the station middle plate can be realized, scaffolds, templates and the like are not required to be erected, the construction is convenient, the construction speed is high, the efficiency is high, and the construction time and the cost are effectively saved. The air duct side plate and the station middle plate are fixedly integrated into a whole through cast-in-place concrete, so that the air duct side plate and the station middle plate are stressed in a synergic mode, and the stability and the reliability of the rail top air duct mounting structure can be improved remarkably.
The invention further has the following beneficial effects:
the invention adopts the modes of offline prefabrication of the air duct side plate and the main body middle plate and integral pouring of the assembled node part, can realize synchronous construction of the middle plate and the rail top air duct of the station, and can obviously save the construction period; prefabricated component lightweight, green, pour the quality reliable, the surface course is smooth, especially, decompose the station medium plate into the structure that prefabricated main part medium plate and cast-in-place medium plate coincide layer combine, utilize main part medium plate, structure side wall and wind channel curb plate as the template, carry out the cast-in-place operation of medium plate coincide layer, easily the operation just pours the quality reliably, enable station medium plate, structure side wall and wind channel curb plate and form whole common stress structure, can improve the structural quality of assembled station.
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 process diagrams of a method for installing an air duct on a rail top according to an embodiment of the present invention; fig. 3 is a schematic view of an installation structure of a rail top air duct obtained by construction;
4-6 are schematic process diagrams of the installation method of the rail-top duct according to the second embodiment of the invention; fig. 6 is a schematic view of an installation structure of a rail top air duct obtained by construction.
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
Referring to fig. 1 to 3, an embodiment of the present invention provides a method for installing a rail-top duct, including the following steps:
s0, prefabricating an air duct side plate 3 and an air duct bottom plate 4, wherein a pouring groove 31 is formed in the top of the air duct side plate 3;
s1, lifting and positioning the air duct side plate 3 on site to enable the pouring groove 31 of the air duct side plate 3 to be communicated with the pouring hole 11 reserved on the station middle plate 1;
s2, enabling cast-in-place concrete to enter the pouring groove 31 of the air duct side plate 3 through the pouring hole 11 on the station middle plate 1, and enabling the air duct side plate 3 and the station middle plate 1 to be fixedly connected together;
and S3, mounting the air duct bottom plate 4 between the structure side wall 2 and the air duct side plate 3.
In this embodiment, through the top at wind channel curb plate 3 set up pour groove 31, pour hole 11 by on the station medium plate 1 behind the cast in situ concrete in this groove 31 of should pouring, can realize the reliable connection of rail top wind channel and station medium plate 1, need not to set up scaffold frame, template etc. construction convenience, construction speed is fast, efficient, practices thrift engineering time and cost effectively. The air duct side plate 3 and the station middle plate 1 are fixedly combined into a whole through cast-in-place concrete, so that the air duct side plate and the station middle plate are stressed in a synergic manner, and the stability and the reliability of the rail top air duct mounting structure can be obviously improved.
Further preferably, as shown in fig. 1-3, a reinforcing steel bar 12 is reserved at the bottom of the station middle plate 1; in the step S1, when the air duct side plate 3 is positioned, the reinforcing steel bars 12 at the bottom of the middle plate 1 in the station extend into the pouring grooves 31 of the air duct side plate 3. When the cast-in-place concrete enters the pouring groove 31, the cast-in-place concrete and the consolidation reinforcing steel bar 12 can be consolidated into a whole, so that the strength and the reliability of the connecting structure between the middle plate 1 and the air duct side plate 3 of the station are further improved. The reinforcing steel bar 12 is preferably a U-shaped reinforcing steel bar embedded in the station middle plate 1, and can be a reinforcing steel bar with other shapes; the reinforcing bars 12 may be vertically inserted into the casting groove 31, or may be obliquely inserted into the casting groove 31. In an optional scheme, when the air duct side plate 3 is prefabricated, an anchoring steel bar extending into the pouring groove 31 can be reserved, so that the bonding strength between the air duct side plate 3 and cast-in-place concrete can be enhanced, and the strength and reliability of a connecting structure between the middle plate 1 and the air duct side plate 3 in a station are further improved; the anchoring steel bar can horizontally extend into the pouring groove 31, or can obliquely extend into the pouring groove 31; the anchoring bar may be a U-shaped bar or the like.
Further preferably, as shown in fig. 1 to fig. 3, at least a portion of the hole wall of the casting hole 11 is an inclined wall that gradually inclines towards the inside of the hole from top to bottom, and compared with a case that the hole wall of the casting hole 11 is a vertical surface, which causes a shear force at a joint between cast-in-place concrete and the hole wall of the casting hole 11, the design of the inclined wall can improve the bonding strength between the cast-in-place concrete and the station middle plate 1 (i.e. the hole wall of the casting hole 11), and the hole wall of the casting hole 11 can effectively support the cast-in-place concrete structure, so that the friction between the cast-in-place concrete structure and the cast-in. As shown in fig. 1 to 3, the casting hole 11 is preferably a wedge-shaped hole with a wide top and a narrow bottom, and the effect is better.
As shown in fig. 2 and 3, the casting groove 31 may be a square groove with the same width from top to bottom; of course, the casting groove 31 is not limited to the square groove shape, for example, the transverse cross section of the casting groove includes an upper straight groove section with a width equal to the top-to-bottom width and a cross-section expanding section with a width increasing gradually and connected to the bottom end of the straight groove section, and the cross-section expanding section may be a linearly expanding section, that is, the groove wall corresponding to the cross-section expanding section is in a dovetail groove shape with a width being narrower at the top and wider at the bottom, or a curvilinearly expanding section, for example, the cross-section expanding section is in a circular shape, but other configurations are also possible, which are not. Compared with the situation that shear force is generated between cast-in-place concrete and the wall of the casting groove 31 due to the structure of the square groove type casting groove 31, in the structure with the section expanding section, the bonding strength between the cast-in-place concrete and the air duct side plate 3 can be improved, the cast-in-place concrete can effectively support the weight of the air duct side plate 3, the friction force between the cast-in-place concrete and the air duct side plate 3 is also remarkably increased, the air duct side plate 3 is not easy to be separated from the cast-in-place concrete, and the use safety of the rail top air duct is.
Further optimizing the above method, for the installation of the air duct bottom plate 4, preferably, the supporting portions 6 are respectively provided on the structural side wall 2 and the air duct side plate 3, and in S3, the air duct bottom plate 4 is raised first, and then the air duct bottom plate 4 is horizontally pushed to the supporting portions 6 placed on both sides. In the present embodiment, the supporting portion 6 is made of a bracket that is integrally prefabricated on the corresponding plate body, but the supporting portion is not limited to the above-mentioned mounting structure, and for example, fixing by bolts or the like is also possible, and details thereof are not described here.
The station middle plate 1 can be a cast-in-place structure or a prefabricated part. When the prefabricated steel bar is a prefabricated component, the pouring hole 11 and the consolidated steel bar 12 are reserved when the prefabricated steel bar is prefabricated; specifically, in S0, prefabricating the station middle plate 1, and correspondingly reserving the pouring hole 11 when prefabricating the station middle plate 1; in S1, after the installation of the station middle plate 1 is completed, the air duct side plate 3 is lifted and positioned, wherein one end of the station middle plate 1 is placed on the structure side wall 2.
Example two
As shown in fig. 4 to 6, an embodiment of the present invention provides an installation method of a rail top air duct, which is an optimized scheme of the installation method provided in the first embodiment, and can implement synchronous construction of a middle plate 1 and the rail top air duct in a station.
The mounting method specifically comprises the following steps:
s0, prefabricating a main body middle plate 13, an air duct side plate 3 and an air duct bottom plate 4, wherein a plurality of pouring holes 11 are reserved in the main body middle plate 13, and pouring grooves 31 are formed in the tops of the air duct side plates 3;
s1, positioning and placing the main body middle plate 13 on site, wherein one end of the main body middle plate 13 is placed on the structure side wall 2;
lifting and positioning the air duct side plate 3 on site to enable the pouring groove 31 of the air duct side plate 3 to be communicated with the pouring hole 11 in the main body middle plate 13;
s2, casting the middle plate laminated layer 14 on site, wherein the middle plate laminated layer 14 covers the surface of the main body middle plate 13, and when the middle plate laminated layer 14 is cast, concrete enters the casting groove 31 of the air duct side plate 3 through the casting hole 11, so that the air duct side plate 3 is fixedly connected with the main body middle plate 13;
and S3, mounting the air duct bottom plate 4 between the structure side wall 2 and the air duct side plate 3.
In the above method, generally, in order to facilitate production, transportation and installation of the prefabricated member, the main body middle plate 13 is generally prefabricated and assembled in sections, the rail-top air duct is also prefabricated and assembled in sections, and the field assembly of the main body middle plate 13 and the field assembly of the rail-top air duct can be performed synchronously or periodically. The prefabrication of each preform is easily performed by those skilled in the art and will not be described in detail herein.
Since the cast-in-place concrete needs to enter the casting groove 31 of the air duct side plate 3 through the casting hole 11 of the main body middle plate 13, when the main body middle plate 13 and the air duct side plate 3 are prefabricated, the corresponding positions of the casting hole 11 and the casting groove 31 need to be ensured according to a pre-designed calculation scheme, and at least part of the casting holes 11 of the main body middle plate 13 are ensured to be communicated with the casting groove 31 of the air duct side plate 3, although generally, each casting hole 11 is respectively communicated with the casting groove 31 below. In addition, concrete vibrating operation can be performed through the pouring hole 11.
For the installation location of main part medium plate 13 and wind channel curb plate 3, can realize through conventional lifting equipment in the current station engineering, specific means here does not need to be repeated.
According to the method provided by the embodiment, the joint part is integrally cast after the air duct side plate 3 and the main body middle plate 13 are prefabricated and assembled offline, so that the synchronous construction of the station middle plate 1 and the rail top air duct can be realized, and the construction period can be obviously saved; the secondary formwork erection is avoided, and the later operation risk caused by incomplete formwork dismantling in the cast-in-place construction method is avoided; prefabricated component lightweight, green, pour the quality reliable, the surface course is smooth, especially, decompose station medium plate 1 into the structure that prefabricated main part medium plate 13 and cast-in-place medium plate coincide layer 14 combine, utilize main part medium plate 13, structure side wall 2 and wind channel curb plate 3 as the template, carry out the cast in situ operation of medium plate coincide layer 14, easy operation and pour the quality reliable, enable station medium plate 1, structure side wall 2 and wind channel curb plate 3 and form whole common stress structure, can improve the structural quality of assembled station.
Further, the middle plate stacking layer 14 also covers the step formed between the main body middle plate 13 and the structure side wall 2, so that the strength and the cooperative stress of the connecting structure between the station middle plate 1 and the structure side wall 2 can be improved.
According to the above method, it can be understood that the rail top air duct is enclosed by the air duct side plates 3, the air duct bottom plate 4 and the structure side walls 2, wherein the structure side walls 2 are formed on the site before the main body middle plate 13 and the air duct side plates 3 are assembled, so that the main body middle plate 13 can be placed on the structure side walls 2 when assembled, and the other end of the main body middle plate 13 can be correspondingly supported according to the design conditions, for example, placed on a support column or placed on the other side wall of a station. In one embodiment, the structural sidewall 2 is cast-in-place on the structural plate 8. In another embodiment, the structural side wall 2 is a prefabricated member, and in S0, the structural side wall 2 is prefabricated; in S1, the structural side wall 2 is also positioned and mounted. By adopting the prefabricated structure side wall 2, the construction efficiency can be further improved, and the construction period can be saved; likewise, the structural side wall 2 is also preferably prefabricated and installed in sections. In a further preferred scheme, the method for positioning and installing the structural side wall 2 includes:
the structure side wall 2 is a hollow prefabricated part and is inserted into a hollow cavity of the structure side wall 2 for positioning through a positioning steel bar 81 reserved on the structure plate 8;
when the middle plate laminated layer 14 is poured, concrete also enters the hollow cavity of the structure side wall 2, and the structure side wall 2, the main body middle plate 13 and the structure plate 8 are fixedly connected into an integral structure. Based on this scheme, can guarantee joint strength and reliability between station medium plate 1 and the structure side wall 2, further improve the structural integrity between station medium plate 1, structure side wall 2 and the wind channel side plate 3, the atress effect is better in coordination.
As shown in fig. 4-6, the structure side wall 2 can be fixedly connected with the adjacent enclosing structure through the side wall overlapping layer 7, that is, the cast-in-place operation of the side wall overlapping layer 7 is performed between the structure side wall 2 and the enclosing structure, so that the structural strength and the stress performance of the fabricated station can be further improved.
EXAMPLE III
As shown in fig. 3, an embodiment of the present invention provides an installation structure of a rail top air duct, including a station middle plate 1, an air duct side plate 3, an air duct bottom plate 4 and a structure side wall 2, where the air duct side plate 3 and the air duct bottom plate 4 are both prefabricated components; a pouring groove 31 is formed in the top of the air duct side plate 3, a plurality of pouring holes 11 communicated with the pouring groove 31 are formed in the station middle plate 1, and the pouring holes 11 and the pouring groove 31 are filled with cast-in-place concrete so that the air duct side plate 3 is fixedly connected with the station middle plate 1; the air duct bottom plate 4 is arranged between the structure side wall 2 and the air duct side plate 3.
A plurality of pouring grooves 31 can be formed in the air duct side plate 3, and the number of the pouring holes 11 in the station middle plate 1 is the same as that of the pouring grooves 31, and the pouring holes and the pouring grooves 31 are configured in a one-to-one correspondence manner; in another embodiment, the casting groove 31 is a through groove extending longitudinally along the rail and penetrating through the front and rear ends of the air duct side plate 3, and a plurality of casting holes 11 are preferably formed above the casting groove 31 to communicate with the through groove, so that on one hand, the efficiency of cast-in-place concrete operation can be improved, on the other hand, the effect of casting concrete in the casting groove 31 can be improved, that is, the effect of fixing the air duct side plate 3 to the station middle plate 1 can be improved.
Further preferably, as shown in fig. 3, the station middle plate 1 is further provided with a plurality of reinforcing steel bars 12 protruding from the bottom of the station middle plate and extending into the pouring groove 31 below. When the air duct side plate 3 is positioned, the fixed reinforcing steel bars 12 extend into the pouring grooves 31 of the air duct side plate 3; when the cast-in-place concrete enters the pouring groove 31, the cast-in-place concrete and the consolidation reinforcing steel bar 12 can be consolidated into a whole, so that the strength and the reliability of the connecting structure between the middle plate 1 and the air duct side plate 3 of the station are further improved. The reinforcing steel bar 12 is preferably a U-shaped reinforcing steel bar embedded in the station middle plate 1, and can be a reinforcing steel bar with other shapes; the reinforcing bars 12 may be vertically inserted into the casting groove 31, or may be obliquely inserted into the casting groove 31. In an optional scheme, when the air duct side plate 3 is prefabricated, an anchoring steel bar extending into the pouring groove 31 can be reserved, so that the bonding strength between the air duct side plate 3 and cast-in-place concrete can be enhanced, and the strength and reliability of a connecting structure between the middle plate 1 and the air duct side plate 3 in a station are further improved; the anchoring steel bar can horizontally extend into the pouring groove 31, or can obliquely extend into the pouring groove 31; the anchoring bar may be a U-shaped bar or the like.
Further preferably, as shown in fig. 3, at least a part of the hole wall of the casting hole 11 is an inclined wall that gradually inclines towards the inside of the hole from top to bottom, and compared with a case that the hole wall of the casting hole 11 is a vertical surface, which causes a shearing force at a joint between the cast-in-place concrete and the hole wall of the casting hole 11, the design of the inclined wall can improve the bonding strength between the cast-in-place concrete and the station middle plate 1 (i.e. the hole wall of the casting hole 11), the hole wall of the casting hole 11 can effectively support the cast-in-place concrete structure, the friction force between the cast-in-place concrete structure and the cast-in-place. As a preferable structure, as shown in fig. 3, the casting hole 11 is a wedge-shaped hole with a wide top and a narrow bottom, and the effect is better.
As shown in fig. 3, the casting groove 31 may be a square groove with the same width from top to bottom; of course, the casting groove 31 is not limited to the square groove shape, for example, the transverse cross section of the casting groove includes an upper straight groove section with a width equal to the top-to-bottom width and a cross-section expanding section with a width increasing gradually and connected to the bottom end of the straight groove section, and the cross-section expanding section may be a linearly expanding section, that is, the groove wall corresponding to the cross-section expanding section is in a dovetail groove shape with a width being narrower at the top and wider at the bottom, or a curvilinearly expanding section, for example, the cross-section expanding section is in a circular shape, but other configurations are also possible, which are not. Compared with the situation that shear force is generated between cast-in-place concrete and the wall of the casting groove 31 due to the structure of the square groove type casting groove 31, in the structure with the section expanding section, the bonding strength between the cast-in-place concrete and the air duct side plate 3 can be improved, the cast-in-place concrete can effectively support the weight of the air duct side plate 3, the friction force between the cast-in-place concrete and the air duct side plate 3 is also remarkably increased, the air duct side plate 3 is not easy to be separated from the cast-in-place concrete, and the use safety of the rail top air duct is.
Further optimizing the above installation structure, for the installation structure of the air duct bottom plate 4, preferably, the structure side wall 2 and the air duct side plate 3 are respectively provided with a bearing part 6, and the air duct bottom plate 4 is placed on the bearing parts 6 on both sides. In the present embodiment, the supporting portion 6 is made of a bracket that is integrally prefabricated on the corresponding plate body, but the supporting portion is not limited to the above-mentioned mounting structure, and for example, fixing by bolts or the like is also possible, and details thereof are not described here.
The station middle plate 1 can be a cast-in-place structure or a prefabricated part. When the prefabricated steel bar is a prefabricated component, the pouring hole 11 and the fixed steel bar 12 are reserved when the prefabricated steel bar is prefabricated.
In this embodiment, through the top at wind channel curb plate 3 set up pour groove 31, pour hole 11 by on the station medium plate 1 behind the cast in situ concrete in this groove 31 of should pouring, can realize the reliable connection of rail top wind channel and station medium plate 1, need not to set up scaffold frame, template etc. construction convenience, construction speed is fast, efficient, practices thrift engineering time and cost effectively. The air duct side plate 3 and the station middle plate 1 are fixedly combined into a whole through cast-in-place concrete, so that the air duct side plate and the station middle plate are stressed in a synergic manner, and the stability and the reliability of the rail top air duct mounting structure can be obviously improved.
Example four
The embodiment of the invention provides a mounting structure of a rail top air duct, which can be used as an optimized scheme of the mounting structure of the rail top air duct in the third embodiment.
As shown in fig. 6, the mounting structure includes a main body middle plate 13, an air duct side plate 3, an air duct bottom plate 4, structural side walls 2 and a middle plate laminated layer 14, wherein the main body middle plate 13, the air duct side plate 3 and the air duct bottom plate 4 are all prefabricated components;
one end of the main body middle plate 13 is placed on the structure side wall 2, the top of the air duct side plate 3 is provided with a pouring groove 31, the main body middle plate 13 is provided with a plurality of pouring holes 11 communicated with the pouring groove 31,
the middle plate laminated layer 14 covers the surface of the main body middle plate 13, the middle plate laminated layer 14 is a cast-in-place concrete layer, and the cast-in-place concrete fills the casting hole 11 and the casting groove 31 to fix the air duct side plate 3 and the main body middle plate 13 together;
the air duct bottom plate 4 is arranged between the structure side wall 2 and the air duct side plate 3.
Typically, to facilitate production, transport and installation of the prefabricated components, the main body panel 13 is typically prefabricated and assembled in sections, as is the rail-top duct. The assembling structure between adjacent segments may be, for example, a tongue-and-groove assembling structure, which is an existing structure in the field and will not be described herein.
According to the mounting structure of the rail top air channel provided by the embodiment, the mode that the air channel side plate 3 and the main body middle plate 13 are prefabricated under the line and the node part is integrally cast after assembly is adopted, so that the complex procedures of secondary mold erecting and the like during in-situ casting of the rail top air channel are avoided, the operation is easy, the problem of cross construction with an electromechanical system during later-stage casting of the rail top air channel is solved, and the construction period can be obviously saved; the secondary formwork erection is avoided, and the later operation risk caused by incomplete formwork dismantling in the cast-in-place construction method is avoided; prefabricated component lightweight, green, pour the quality reliable, the surface course is smooth, especially, decompose station medium plate 1 into the structure that prefabricated main part medium plate 13 and cast-in-place medium plate coincide layer 14 combine, utilize main part medium plate 13, structure side wall 2 and wind channel curb plate 3 as the template, carry out the cast in situ operation of medium plate coincide layer 14, easy operation and pour the quality reliable, enable station medium plate 1, structure side wall 2 and wind channel curb plate 3 and form whole common stress structure, can improve the structural quality of assembled station.
The mounting structure is further optimized, and the structure side wall 2 is a prefabricated part and is positioned and mounted on the structure plate 8. Preferably, the structure side wall 2 is a hollow prefabricated member, positioning steel bars 81 are reserved on the structure plate 8, the positioning steel bars 81 are inserted into the hollow cavity of the structure side wall 2, and cast-in-place concrete further fills the hollow cavity of the structure side wall 2 to fixedly connect the structure side wall 2, the main body middle plate 13 and the structure plate 8 into an integral structure. Based on this scheme, can guarantee joint strength and reliability between station medium plate 1 and the structure side wall 2, further improve the structural integrity between station medium plate 1, structure side wall 2 and the wind channel side plate 3, the atress effect is better in coordination.
The installation structure may be implemented by the installation method provided in the second embodiment, and the contents between the second embodiment and the fourth embodiment may be used as a supplement to each other, for example, the structure side wall 2 is fixed to the adjacent enclosure structure through the side wall stacking layer 7, that is, the side wall stacking layer 7 is cast in situ between the structure side wall 2 and the enclosure structure, and the like, which are not described in detail herein.
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 (13)
1. A rail top air duct installation method is characterized by comprising the following steps:
s0, prefabricating an air duct side plate and an air duct bottom plate, wherein a pouring groove is formed in the top of the air duct side plate;
s1, lifting and positioning the air duct side plate on site to communicate the pouring groove of the air duct side plate with a pouring hole reserved on the middle plate of the station;
s2, enabling cast-in-place concrete to enter a pouring groove of the air duct side plate through a pouring hole in the station middle plate, and enabling the air duct side plate and the station middle plate to be fixedly connected together;
and S3, mounting the air duct bottom plate between the structure side wall and the air duct side plate.
2. The method of installing a rail-roof duct according to claim 1, wherein the station mid-slab is a prefabricated member,
in the S0, prefabricating a station middle plate, wherein a pouring hole is reserved correspondingly when the station middle plate is prefabricated;
in S1, after the installation of the station middle plate is completed, the air duct side plate is lifted and positioned, wherein one end of the station middle plate is placed on the structure side wall.
3. The method for installing a rail-roof duct according to claim 1 or 2, wherein the station middle plate comprises a prefabricated main body middle plate and a cast-in-place middle plate laminated layer;
in S0, prefabricating a main body middle plate, wherein a pouring hole is reserved correspondingly when the main body middle plate is prefabricated;
in S1, after positioning and placing the middle plate of the main body, lifting and positioning the side plates of the air duct are carried out, wherein one end of the middle plate of the main body is placed on the side wall of the structure;
and S2, casting a middle plate superposed layer on the surface of the middle plate of the main body in situ, wherein the concrete enters the casting groove of the air duct side plate through the casting hole when the middle plate superposed layer is cast, so that the air duct side plate and the middle plate of the main body are fixedly connected together.
4. A method of installing an over-the-rail duct as claimed in claim 3, wherein: the side wall of the structure is a prefabricated part,
in S0, prefabricating the structural side wall;
in S1, positioning and mounting of the structural side walls are also performed.
5. The method for installing the rail-top duct according to claim 4, wherein the method for positioning and installing the structural side wall comprises the following steps:
the structure side wall is a hollow prefabricated part and is inserted into a hollow cavity of the structure side wall for positioning through a positioning steel bar reserved on the structure plate;
when the middle plate laminated layer is poured, concrete still enters the hollow cavity of the structure side wall, and the structure side wall, the main body middle plate and the structure plate are fixedly connected into an integral structure.
6. The method of installing an overhead rail duct of claim 1, wherein: reserving a consolidated steel bar at the bottom of the middle plate of the station; and S1, when the air duct side plate is positioned, the consolidated steel bars at the bottom of the middle plate of the station extend into the pouring grooves of the air duct side plate.
7. The method of installing an overhead rail duct of claim 1, wherein: and in S3, the air duct bottom plate is lifted first and then horizontally pushed to the bearing parts arranged at two sides.
8. The utility model provides a mounting structure in rail top wind channel, includes station medium plate, wind channel curb plate, wind channel bottom plate and structure side wall, its characterized in that: the air duct side plate and the air duct bottom plate are prefabricated components;
the top of the air duct side plate is provided with a pouring groove, the station middle plate is provided with a plurality of pouring holes communicated with the pouring groove, and the pouring holes and the pouring groove are filled with cast-in-place concrete so that the air duct side plate and the station middle plate are fixedly connected together;
the air duct bottom plate is arranged between the structure side wall and the air duct side plate.
9. The structure for mounting an overhead air duct according to claim 8, wherein: the station middle plate is also provided with a plurality of consolidated steel bars which protrude out of the bottom of the station middle plate and extend into the pouring groove below the station middle plate.
10. The structure for mounting an overhead air duct according to claim 8, wherein: the station middle plate comprises a prefabricated main body middle plate and a cast-in-place middle plate superposed layer;
one end of the main body middle plate is placed on the structure side wall and is reserved with the pouring hole;
the middle plate superposed layer covers the surface of the middle plate of the main body, and is a cast-in-place concrete layer and the cast-in-place concrete further fills the pouring hole and the pouring groove.
11. The structure for mounting an overhead air duct according to claim 10, wherein: the structure side wall is a prefabricated part and is positioned and installed on the structure plate.
12. The structure for mounting an overhead air duct according to claim 11, wherein: the structure side wall is a hollow prefabricated part, positioning steel bars are reserved on the structure plate and inserted into a hollow cavity of the structure side wall, and cast-in-place concrete further fills the hollow cavity of the structure side wall to fixedly connect the structure side wall, the main body middle plate and the structure plate into an integral structure.
13. The structure for mounting an overhead air duct according to claim 8, wherein: the structure side wall and the air duct side plate are respectively provided with a bearing part, and the air duct bottom plate is placed on the bearing parts on the two sides.
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