CN110805464A - Subway station prefabricated rail top air duct and installation method thereof - Google Patents
Subway station prefabricated rail top air duct and installation method thereof Download PDFInfo
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- CN110805464A CN110805464A CN201911095257.9A CN201911095257A CN110805464A CN 110805464 A CN110805464 A CN 110805464A CN 201911095257 A CN201911095257 A CN 201911095257A CN 110805464 A CN110805464 A CN 110805464A
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- 238000009434 installation Methods 0.000 title abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 29
- 239000000565 sealant Substances 0.000 abstract description 9
- 229920001971 elastomer Polymers 0.000 abstract description 5
- 210000003205 muscle Anatomy 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 7
- 229920005549 butyl rubber Polymers 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 210000001624 hip Anatomy 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
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Abstract
The invention discloses a prefabricated rail top air duct of a subway station and an installation method thereof, belonging to the technical field of constructional engineering. Prefabricated rail top wind channel is connected with the cast-in-place concrete anchor through overhanging hu zi muscle with the medium plate, and prefabricated rail top wind channel is under construction simultaneously with the medium plate, need not secondary civil engineering construction, and the work progress still less, and the construction is more convenient, and the efficiency of construction is higher, and structural integrity is better, has avoided the perishable problem that the steel construction exposes simultaneously. Furthermore, a first groove is longitudinally reserved on the air duct wall, the top plate and the bottom plate, the joint is filled with rubber strips and sealant, bolt holes are reserved at four ends of the air duct, pretightening force is provided through bolts during installation, two sections of air ducts are connected, and the sealing device is safer and more reliable on the premise of meeting sealing requirements.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and particularly relates to a subway station prefabricated rail top air duct and an installation method thereof.
Background
The construction of the rail top air duct in the subway station mainly adopts a traditional production mode mainly based on field construction, and the production mode has the advantages of low industrialization degree, extensive design and construction, unstable product quality, low construction efficiency, large labor demand, large material loss and construction waste amount, and large resource and energy consumption, and cannot meet the requirements of energy-saving and environment-friendly sustainable development construction. In terms of construction, the following disadvantages mainly exist:
1. because the clearance height of the rail top air channel is generally less than 1 meter, the template erection and reinforcement binding are very difficult to implement.
2. The rail top air duct hanging wall is difficult to pour, dense pouring is difficult, the air duct civil engineering construction positioning is required to be controlled within 10mm for the top-hung type shielding door, and the rectification is particularly difficult if the construction precision cannot be achieved.
3. After the construction of the main structure in the station is completed, secondary construction is carried out on the rail top air channel, a civil engineering secondary approach is needed, meanwhile, electromechanical installation, station decoration and rail construction also approach, cross operation can occur, and the whole line construction period is influenced.
In some subway projects in recent years, for example, the attempt of prefabricating a rail top air duct is also made on Chengdu subway No. 2 line, Beijing subway No. 6 line and the like, but the effect is not good, and the following problems mainly exist:
1. the key connection node of permanent atress adopts the steel construction to connect, has anticorrosive fire prevention problem, and later maintenance expense is high.
2. The prefabricated rail top air duct does not consider the tightness of longitudinal connection, and the tightness cannot be guaranteed.
3. The components for prefabricating the rail top air channel by adopting common concrete are too heavy, and the construction difficulty is high.
4. Secondary civil work is still needed, and the construction efficiency is not improved.
5. Need hang prefabricated wind channel and install at the medium plate holing, the construction precision is not high.
Disclosure of Invention
In order to solve the problems, the prefabricated rail top air channel and the middle plate are convenient to transport and hoist, the simultaneous construction of the prefabricated rail top air channel and the middle plate is realized, secondary civil engineering construction is not needed, the overall stability and the use durability are better, the cost is reduced, the operation is convenient and fast, and the efficiency is higher, the prefabricated rail top air channel of the subway station and the installation method of the prefabricated rail top air channel are provided. The technical scheme is as follows:
the utility model provides a prefabricated rail top wind channel of subway station, prefabricated rail top wind channel be the integrated into one piece structure, the wind channel port in prefabricated rail top wind channel is a mouthful style of calligraphy, comprises left and right wind channel wall, roof and bottom plate, left and right wind channel wall include left wind channel wall and right wind channel wall, left and right wind channel wall tip be equipped with the reinforcing bar respectively, one of wind channel port serves and is equipped with the sunken mouth, the cross section of sunken mouth be less than the cross section of wind channel port.
Furthermore, screw holes are formed in two ports of the side wall of the air channel at the top of the prefabricated rail, hand holes are formed in the side faces of the left air channel wall and the right air channel wall adjacent to the screw holes, and the hand holes are communicated with the screw holes.
Furthermore, the screw holes are in an oval shape or a round end shape, and the positions of the screw holes at two ports of the side wall of the same prefabricated rail top air channel are in a crossed relation. When a plurality of prefabricated rail top air channels are correspondingly connected at the head, the oval or round end-shaped screw holes at the connecting part can be crossed, and the bolts connect the adjacent prefabricated rail top air channels through the crossed holes. The design of the cross direction of the oval or round end-shaped screw holes at the two ports of the prefabricated rail top air duct is beneficial to conveniently and quickly aligning and connecting the two screw holes.
The air duct is characterized in that the sunken port is a first groove, the other end of the air duct port is provided with a protruding structure, and the protruding structure of one prefabricated rail top air duct and the first groove of the other prefabricated rail top air duct are mutually matched and connected.
Furthermore, a second groove is further arranged on the first groove, and the cross section of the second groove is smaller than that of the first groove.
Furthermore, the recess opening is a second groove, and the other end of the air duct port is a plane.
Furthermore, the hand hole is an embedded steel box, the embedded steel box is located on two ports of the side wall of the air duct, and the screw hole is formed in the embedded steel box.
Furthermore, an axillary corner is made at the internal corner of the prefabricated rail top air duct.
Furthermore, a positioning hole is arranged on an axillary corner at one end of the air duct port, and a positioning pin is arranged at the other end of the air duct port.
Furthermore, a reserved hole is formed in the lower end of the side face of the right air duct wall.
The invention also provides an installation method of the prefabricated rail top air duct, which comprises the following steps:
(1) manufacturing a plurality of prefabricated rail top air channels, and keeping the upper surfaces of the top plates of the prefabricated rail top air channels rough;
(2) arranging a sealing element in a sunken opening on the port of the air duct;
(3) correspondingly connecting the air duct ports of the prefabricated rail top air duct end to end; or the air duct ports of a plurality of sections of prefabricated rail top air ducts are correspondingly connected end to end and then lifted to a preset height;
(4) repeating the steps (2) to (3), combining and splicing a plurality of sections of prefabricated rail top air channels front and back, and injecting fillers into joints to ensure the tightness;
(5) erecting scaffolds and templates outside the range of the air duct;
(6) filling filler into a first gap formed by the top plate and the template, and keeping sealing;
(7) binding middle plate steel bars, pouring middle plate concrete, and waiting for the concrete to solidify;
(8) and (5) circulating the step (2) -the step (9) until the whole subway rail top air duct is formed by mutually splicing a plurality of prefabricated rail top air ducts along the longitudinal direction of the station.
The invention has the beneficial effects that:
1. the form of combining the lightweight aggregate concrete and the common steel bars is adopted, the volume weight of the lightweight aggregate concrete is 1600-1800kg/m3, and on the premise of meeting the requirements of strength and rigidity, the weight of the air duct is at least reduced by 1/3, so that the transportation and the hoisting are convenient.
2. In the aspect of construction, the prefabricated rail top air channel and the middle plate are constructed simultaneously, secondary civil engineering construction is not needed, the integrity is better, and the construction efficiency is faster.
3. The framework link of the middle plate bottom die in the range of the air duct is saved, and the operation is simpler and more convenient.
4. The permanent atress junction is overhanging hu zi muscle and cast-in-place concrete anchor connection, compares steel construction connected mode, has avoided the perishable problem of steel construction exposure, and is more safe and reliable, and need not the later maintenance.
5. On the premise of meeting the ventilation area, armpit processing is carried out at four corners in the air duct so as to avoid stress concentration at the corners and ensure the integrity of the air duct.
6. The air duct side wall, the top plate and the bottom plate are longitudinally provided with sunken openings, the joints are filled with rubber strips and sealant, bolt holes are reserved at four ends of the air duct, pretightening force is provided through bolts during installation, and a plurality of sections of air ducts are connected.
Drawings
FIG. 1 is a schematic longitudinal sectional front view of an installation of a prefabricated rail top air duct and a middle plate;
FIG. 2 is a side cross-sectional view of the pre-cast rail head duct of example 1;
FIG. 3 is a front view of the prefabricated rail-top duct of example 1;
FIG. 4 is a rear view of the pre-cast rail head duct of example 1;
FIG. 5 is a schematic side view of the connection between the precast rail head ducts of example 1;
FIG. 6 is a front view of the pre-cast rail-top duct of example 2;
FIG. 7 is a rear view of the pre-cast rail head duct of example 2;
FIG. 8 is a right side schematic view of the connection between the prefabricated rail head ducts of example 2;
FIG. 9 is a schematic view showing the connection of the recesses between the precast rail head ducts according to example 2;
FIG. 10 is a schematic view of the connection of the pre-fabricated rail top air ducts through the round-ended screw holes in example 2.
Note: 1, middle plate; 2, a top plate; 3, beard tendon; 4 a first gap; 5 a right air duct wall; 6, template; 7 reserving holes; 8, a movable bracket; 9 left air duct wall; 10 axillary horn; 11 a first groove; 12 a second groove; 13 a raised structure; 14 hand holes; 15 screw holes; 16 sealing strips; 17 sealing glue; 18 a second gap; 19 a rubber plate; 20, positioning holes; 21 embedding a steel box in advance.
Detailed Description
To facilitate understanding and practice of the invention by those of ordinary skill in the art, the invention is described in further detail below with reference to the drawings and specific examples.
As shown in figure 1, the invention provides a prefabricated rail top air duct which comprises a left air duct wall 9, a right air duct wall 5, a top plate 2 and a bottom plate, wherein the main structure of the prefabricated rail top air duct is in a shape of a Chinese character kou, and two rows of beard ribs 3 are respectively arranged at the tops of the left air duct wall 9 and the right air duct wall 5. The main body frame of the prefabricated track air duct is formed by filling light aggregate concrete after being connected by common steel bars, the volume weight of the light aggregate concrete is 1600-1800kg/m3, and on the premise of meeting the requirements of strength and rigidity, the weight of the air duct is at least reduced by 1/3, so that the air duct is more convenient to transport and hoist.
The beard ribs 3 are inverted L-shaped, one end of each beard rib is anchored with the prefabricated rail top air channel, and the two rows of inverted L-shaped beard ribs 3 form a T-shaped structure.
Four corners of the prefabricated rail top air channel are also provided with axillary corners 10, so that stress concentration at the corners can be avoided on the premise of meeting the ventilation area, and the overall stability of the air channel is ensured.
Due to the combination of the used lightweight aggregate concrete and the steel bars, the thickness of the prefabricated rail top air duct is 150mm, the existing rail top air duct is mostly cast in situ, the thickness is generally 250mm at 200 mm, and compared with the existing air duct, the prefabricated rail top air duct is thinner on the premise of meeting the bearing stability, and the space and the materials are saved.
According to the size and the space of the subway station rail top air holes, the whole subway rail top air channel is formed by mutually splicing a plurality of prefabricated rail top air channels along the length direction of the rail top air channel.
The connection of a plurality of prefabricated rail top air ducts and the corresponding installation mode thereof are further described in the following with reference to the attached drawings.
Example 1
As shown in fig. 1 and 2, the lower end of the right air duct wall 5 is provided with two reserved holes 7, and the two reserved holes 7 are arranged on the same horizontal line and used for installing the subway platform screen door. In the prior art, after a rail top air duct is generally poured or installed, when a shielding door needs to be installed, holes are directly punched on site, operation is not easy, and the stability of an installed structure is easy to damage.
As can be seen from fig. 2, 3 and 4, the two ports of the left air duct wall and the right air duct wall are respectively provided with a screw hole 15, the outer side surfaces of the left air duct wall and the right air duct wall are provided with hand holes 14, bolts can be put into the screw holes 15 through the hand holes 14, the hand holes 14 are located at a position about 15cm away from the ports of the prefabricated rail top air ducts, and when the prefabricated rail top air ducts are connected with each other, the distance between the two hand holes 14 connected with each other through the bolts is about 30 cm.
As shown in fig. 2, 4 and 5, a raised structure 13 is arranged at a port at one end of the prefabricated rail top air duct, a first groove 11 is arranged at a port at the other end of the air duct, a second groove 12 is further arranged at a port of the air duct provided with the first groove 11, the cross section of the first groove 11 is smaller than that of the second groove 12, the prefabricated rail top air ducts are mutually matched and connected through the raised structure 13 and the second groove 12, the first groove 11 is a ladder-shaped groove, the two waists of the ladder-shaped groove are 20mm, the upper bottom is 11mm, the lower bottom is 19mm, and the lower bottom is an opening end of the first groove 11. The first groove 11 is used for placing a sealing strip 16, and when two prefabricated rail top air ducts are connected, the sealing strip 16 is filled in a second gap 18 formed by the second groove 12 of the prefabricated rail top air duct and the protruding structure 13, so that the prefabricated rail top air ducts are connected more tightly.
As shown in fig. 5, the present invention further provides a connection method between prefabricated rail top air ducts, which comprises the following steps:
(1) firstly, filling a sealing strip 16 at a first groove 11 of a prefabricated rail top air duct;
(2) correspondingly connecting the second groove 12 of one prefabricated rail top air duct with the raised structure 13 of the other prefabricated rail top air duct, and enabling the raised structure 13 to be in contact with the sealing strip 16 in the first groove 11;
(3) bolts penetrate through screw holes 15 on the adjacent prefabricated rail top air channels through hand holes 14 on the left air channel wall and the right air channel wall of the prefabricated rail top air channel respectively, and the two prefabricated rail top air channels are tightly connected;
(4) in order to make the prefabricated rail top air ducts connected in a sealing way, a rubber plate 19 is added into the connecting gap of the prefabricated rail top air ducts connected with each other, and then the prefabricated rail top air ducts are sealed by sealant 17.
Further, the invention also provides an installation method of any one of the prefabricated rail top air ducts, as shown in fig. 1, fig. 2 and fig. 5, and the installation method specifically comprises the following steps:
(1) concrete on the upper surface of the prefabricated rail top air duct top plate 2 keeps a rough surface;
(2) adding a sealing strip 16 at the second groove 12 of the prefabricated rail top air channel;
(3) lifting the prefabricated rail top air channel to a design height by adopting a movable scaffold or an adjustable support frame, such as a movable support 8, wherein the design height is the position where the upper surface of the top plate 2 and a middle plate bottom template 6 which is erected at two sides of the air channel are higher than the thickness of a plate steel bar protection layer;
(4) connecting screw holes 15 of two adjacent air channels by using bolts, wherein two ends of each bolt need to extend to a hand hole 14, screwing nuts through the hand holes 14 to achieve the pre-tightening force of joints, and filling sealant at the joints;
(5) a first gap 4 is formed at the joint of the top plate 2 and the two side templates 6, and sealant is filled in the first gap 4 to prevent slurry leakage, and at the moment, the top plate 2 and the templates 6 form a bottom die of the middle plate;
(6) binding the steel bar of the middle plate 1, pouring concrete, and detaching the movable support 8 under the air channel when the strength of the middle plate reaches more than 80%.
The roof 2 in prefabricated rail top wind channel this moment is the bottom plate of medium plate 1, and prefabricated rail top wind channel is connected with medium plate 1 fastening through pre-buried beard muscle 3, simultaneously through bolt and sealed glue sealing connection between a plurality of prefabricated rail top wind channels.
Example 2
As shown in fig. 1 and 6, the lower end of the right air duct wall 5 is provided with two reserved holes 7, and the two reserved holes 7 are arranged on the same horizontal line and used for installing the subway platform screen door. The reserved hole 7 is 190mm away from the lower end of the right air duct wall 5, and the diameter is 20 mm. In the prior art, after a rail top air duct is generally poured or installed, when a shielding door needs to be installed, holes are directly punched on site, operation is not easy, and the stability of an installed structure is easy to damage.
As shown in fig. 6 and 7, screw holes 15 are respectively formed at the ports of the left and right air duct walls, hand holes 14 are formed on the outer side surfaces of the left and right air duct walls, and bolts can be put into the screw holes 15 through the hand holes 14. Further, the hand hole 14 is formed by an embedded steel box 21, the embedded steel box 21 is a hexahedron, and the embedded steel box 21 is located at an opening of one side of the side wall of the prefabricated rail top air duct, namely the hand hole 14. The embedded steel box 21 is welded with the steel bars inside the prefabricated rail top air channel and embedded into the concrete structure of the prefabricated air channel in advance.
Further, pre-buried steel box 21 be located the port department in prefabricated rail top wind channel, when interconnect between the prefabricated rail top wind channel, pre-buried steel box 21 on the prefabricated rail top wind channel position corresponds and contacts each other. The embedded steel box 21 is provided with screw holes 15 for tight connection between the prefabricated rail top air channels, and further, as shown in fig. 10, the screw holes 15 are in a round end shape, when the head and the tail of two adjacent prefabricated rail top air channels are correspondingly connected, the round end shape screw holes at the connecting part are crossed at a certain angle, so that the installation of screws and the fixation after the installation are facilitated.
Furthermore, the four corners of one air duct port of the prefabricated rail top air duct are also provided with positioning holes 20, the other air duct port is provided with positioning holes 20 or positioning pins, when the prefabricated rail top air ducts are connected, the adjacent prefabricated rail top air ducts are connected by the positioning pins, or the positioning pins of the adjacent prefabricated rail top air ducts are connected with the positioning holes 20, the hole diameter of each positioning hole 20 is 1mm, and the hole depth is about 30 mm. The positioning holes 20 are used for pre-connecting and positioning the prefabricated rail top air duct.
Furthermore, one end of an air duct port of the prefabricated rail top air duct is provided with a first groove 11, the first groove 11 is located between the embedded steel box 21 and the positioning hole 20, and the other end of the air duct port is a plane.
When the pre-fabricated rail top air ducts are connected to each other, as shown in fig. 8 and 9, the first concave partGroove 11 department sealing strip 16 earlier, sealing strip 16 be sponge putty sealing strip, the edge of sponge putty sealing strip constitute by unvulcanized butyl rubber putty, be EPDM foaming sponge in the middle of the unvulcanized butyl rubber putty, the bonding tensile shear strength of unvulcanized butyl rubber putty be not less than 0.07Mpa, density is 1.6 0.3g/cm3The sponge has a tensile strength of not less than 1.0MPa and a density of 0.5 + -0.15 g/cm3。
When the two prefabricated rail top air channels are connected with each other, the sponge putty water stop strip is extruded and filled in the first groove 11 of the prefabricated rail top air channel, so that the prefabricated rail top air channel is more tightly connected.
The invention also provides a connection mode among the prefabricated rail top air channels, which comprises the following steps:
(1) filling a sponge putty water stop strip at a first groove 11 of a prefabricated rail top air duct;
(2) correspondingly connecting one end face with a first groove 11 with a plane air duct port of another prefabricated rail top air duct;
(3) bolts penetrate through screw holes 15 on the adjacent prefabricated rail top air channels through hand holes 14 on the left air channel wall and the right air channel wall of the prefabricated rail top air channel respectively, and the two prefabricated rail top air channels are tightly connected;
(4) in order to make the prefabricated rail top air ducts connected in a sealing way, a rubber plate 19 is added into the connecting gap of the prefabricated rail top air ducts connected with each other, and then the prefabricated rail top air ducts are sealed by sealant 17.
Further, the invention also provides an installation method of any one of the prefabricated rail top air ducts, as shown in fig. 1 and fig. 5, which specifically comprises the following steps:
(1) concrete on the upper surface of the prefabricated rail top air duct top plate 2 keeps a rough surface;
(2) adding a sponge putty water stop strip at the first groove 11 of the prefabricated rail top air duct;
(3) lifting the prefabricated rail top air channel to a design height by adopting a movable scaffold or an adjustable support frame, such as a movable support 8, wherein the design height is that the upper surface of the top plate 2 is higher than the thickness of a plate steel bar protective layer of a middle plate bottom template 6 erected on two sides of the air channel;
(4) connecting screw holes 15 of two adjacent air channels by using bolts, wherein two ends of each bolt need to extend to a hand hole 14, screwing nuts through the hand holes 14 to achieve the pre-tightening force of joints, and filling sealant at the joints;
(5) sealant is filled in a first gap 4 formed at the joint of the top plate 2 and the two side templates 6 so as to prevent slurry leakage, and the top plate 2 and the templates 6 form a bottom die of the middle plate;
(6) binding the reinforcing steel bars in the middle plate 1, pouring the concrete in the middle plate 1, and detaching the movable support 8 under the air flue when the middle plate reaches 80% of design strength.
At the moment, the top plate 2 of the prefabricated rail top air channel is a bottom plate of the middle plate 1 and is longitudinally and fixedly connected with the middle plate 1 through the embedded beard ribs 3, and the prefabricated rail top air channels on the transverse direction are in sealing connection through bolts and sealant.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the spirit of the present invention, and these modifications and decorations should also be regarded as being within the scope of the present invention.
Claims (10)
1. The utility model provides a prefabricated rail top wind channel of subway station, its characterized in that, prefabricated rail top wind channel be the integrated into one piece structure, the wind channel port of prefabricated rail top wind channel is a mouthful style of calligraphy, comprises wind channel wall, roof (2) and bottom plate about by, wind channel wall include left wind channel wall (9) and right wind channel wall (5) about, wind channel wall tip do not is equipped with the reinforcing bar about, one of wind channel port serves and is equipped with the sunken mouth, the cross section of sunken mouth be less than the cross section of wind channel port.
2. The prefabricated rail-top air duct according to claim 1, wherein screw holes (15) are formed in two ports of the side wall of the prefabricated rail-top air duct, hand holes (14) are formed in the side surfaces of the left air duct wall and the right air duct wall adjacent to the screw holes (15), and the hand holes (14) are communicated with the screw holes (15).
3. The prefabricated rail-top air duct according to claim 2, wherein the screw holes (15) are oval or round, and the positions of the screw holes (15) at two ports of the side wall of the same prefabricated rail-top air duct are in a cross relationship.
4. The pre-made rail head duct according to claim 1, wherein the recess opening is a first groove (11) and the other end of the duct port is a flat surface.
5. The pre-cast rail-top air duct according to claim 4, characterized in that the duct port provided with the first groove (11) is further provided with a second groove (12), the cross section of the second groove (12) is larger than that of the first groove (11), the other end of the duct port is provided with a raised structure (13), and the raised structure (13) of one pre-cast rail-top air duct and the second groove (12) of the other pre-cast rail-top air duct are mutually connected in a matching manner.
6. The precast rail top air duct according to claim 2, characterized in that the hand hole (14) is an embedded steel box (21), the embedded steel box (21) is located at two ports of the side wall of the air duct, and the screw hole (15) is arranged on the embedded steel box (21).
7. The prefabricated rail-top air duct according to any one of claims 1 to 6, wherein an internal corner of the prefabricated rail-top air duct is provided with an axillary corner.
8. The precast rail roof duct according to claim 7, characterized in that a positioning hole (20) is provided on an axillary corner of one end of the duct port, and a positioning pin is provided on the other end of the duct port.
9. The prefabricated rail-roof duct of any one of claims 1 to 6, wherein the lower end of the side surface of the right duct wall (5) is provided with a reserved hole (7).
10. The mounting method of the prefabricated rail top air duct is characterized by comprising the following steps of:
(1) manufacturing a plurality of prefabricated rail-top air ducts according to any one of claims 1 to 9, and keeping the upper surfaces of the top plates of the prefabricated rail-top air ducts rough;
(2) arranging a sealing element in a sunken opening on the port of the air duct;
(3) sequentially lifting a plurality of sections of prefabricated rail top air channels to a preset height, and correspondingly connecting the air channel ports of the prefabricated rail top air channels end to end; or the air duct ports of a plurality of sections of prefabricated rail top air ducts are correspondingly connected end to end and then lifted to a preset height;
(4) repeating the steps (2) to (3), combining and splicing a plurality of sections of prefabricated rail top air channels front and back, and injecting fillers into joints to ensure the tightness;
(5) a scaffold and a template (6) outside the range of the air duct are supported;
(6) filling materials are injected into a first gap (4) formed by the top plate (2) and the template (6) to keep sealing;
(7) binding the steel bars of the middle plate (1), pouring the concrete of the middle plate (1), and waiting for the concrete to solidify;
(8) and (5) circulating the step (2) -the step (7) until the whole subway rail top air duct is formed by mutually splicing a plurality of prefabricated rail top air ducts along the longitudinal direction of the station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911095257.9A CN110805464A (en) | 2019-11-11 | 2019-11-11 | Subway station prefabricated rail top air duct and installation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911095257.9A CN110805464A (en) | 2019-11-11 | 2019-11-11 | Subway station prefabricated rail top air duct and installation method thereof |
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| CN110805464A true CN110805464A (en) | 2020-02-18 |
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| CN201911095257.9A Pending CN110805464A (en) | 2019-11-11 | 2019-11-11 | Subway station prefabricated rail top air duct and installation method thereof |
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| CN (1) | CN110805464A (en) |
Cited By (3)
| 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 |
| CN113863372A (en) * | 2021-10-28 | 2021-12-31 | 中交一航局城市交通工程有限公司 | Installation method of prefabricated structure of air duct at top of underground station rail |
| CN114685124A (en) * | 2022-05-31 | 2022-07-01 | 中建六局(天津)绿色建筑科技有限公司 | Prefabricated rail top air duct assembling gap sealing filler and construction method thereof |
-
2019
- 2019-11-11 CN CN201911095257.9A patent/CN110805464A/en active Pending
Cited By (4)
| 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 |
| CN113863372A (en) * | 2021-10-28 | 2021-12-31 | 中交一航局城市交通工程有限公司 | Installation method of prefabricated structure of air duct at top of underground station rail |
| CN114685124A (en) * | 2022-05-31 | 2022-07-01 | 中建六局(天津)绿色建筑科技有限公司 | Prefabricated rail top air duct assembling gap sealing filler and construction method thereof |
| CN114685124B (en) * | 2022-05-31 | 2022-09-02 | 中建六局(天津)绿色建筑科技有限公司 | Prefabricated rail top air duct assembling gap sealing filler and construction method thereof |
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