An underground tunnel rail top air duct structure

Abstract

The utility model discloses an underground tunnel rail top air duct structure, including air duct bottom plate and two air duct side walls, two air duct side walls and tunnel roof board integrative pouring formation and opposite arrangement are personally experienced sth, the bottom of air duct side wall is equipped with a plurality of length direction interval arrangement's transverse perforation, air duct bottom plate is the prefabricated part, the both sides of air duct bottom plate all are equipped with a plurality of length direction interval arrangement's screw hole, the screw hole of air duct bottom plate both sides and two air duct side walls's transverse perforation one to one corresponding arrangement, and corresponding transverse perforation and screw hole are connected through fixed bolt. The whole construction installation of this underground tunnel rail top air duct structure is convenient, and construction efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of subway station track top ventilation duct construction technology, specifically to an underground tunnel track top ventilation duct structure. Background Technology

[0002] Underground tunnels typically employ track-top ventilation ducts at the top for air supply and exhaust, ensuring the air environment within the tunnel meets regulatory requirements and operational conditions. Conventional track-top ventilation ducts utilize cast-in-place concrete structures and are relatively low in height. Construction of track-top ventilation ducts generally employs two methods. The first method involves construction workers supporting formwork inside the duct, which then needs to be dismantled later. Because the formwork supports occupy a large space, dismantling is generally only possible manually, resulting in high labor intensity, time-consuming, and inefficient work. The second method involves constructing the ventilation duct structure after the main structure is completed. A representative example is a prefabricated subway station rail-top ventilation duct disclosed in Chinese patent document application number 201921635890.8. This duct is suspended from the rail-top middle plate at the top of the subway station and is a channel formed by the rail-top middle plate, a set of ventilation duct bottom plates, and two sets of left and right ventilation duct hanging beams. The rail-top middle plate is integrally cast with the main side wall of the subway station. The ventilation duct bottom plates and ventilation duct hanging beams are prefabricated components. The ventilation duct hanging beams are arranged in pairs and suspended and fixed on the rail-top middle plate. A base plate support beam is integrally provided on the inner side of the bottom end of the ventilation duct hanging beams. The two sides of the ventilation duct bottom plate are respectively supported and fixed on the base plate support beams of the left and right ventilation duct hanging beams. The drawback of prefabricated subway station track-top ventilation ducts is that, because the bottom inner side of the ventilation duct hanging beam is equipped with a base plate support beam, the ventilation duct base plate needs to be lifted to the installation height before the ventilation duct hanging beam is installed. This makes the subsequent installation of the ventilation duct hanging beam inconvenient and affects the overall construction efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide an underground tunnel track top ventilation duct structure that is convenient to construct and install as a whole and has high construction efficiency.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An underground tunnel track-top ventilation duct structure includes a ventilation duct bottom plate and two ventilation duct sidewalls. The two ventilation duct sidewalls are integrally cast with the tunnel top plate and arranged opposite to each other. The bottom of the ventilation duct sidewalls is provided with a plurality of transverse perforations spaced apart along the length direction. The ventilation duct bottom plate is a precast component. Both sides of the ventilation duct bottom plate are provided with a plurality of threaded holes spaced apart along the length direction. The threaded holes on both sides of the ventilation duct bottom plate are arranged one-to-one with the transverse perforations of the two ventilation duct sidewalls. The corresponding transverse perforations and threaded holes are connected by fixing bolts.

[0006] As a further improvement to the above technical solution:

[0007] The sidewall of the air duct is pre-embedded with a first embedded part at the location of each transverse perforation, and the transverse perforation is formed in the first embedded part.

[0008] The internal steel bars of the ventilation duct sidewall are welded to the internal steel bars of the tunnel roof slab, and the first embedded part is welded to the internal steel bars of the ventilation duct sidewall.

[0009] The bottom plate of the air duct has a second embedded part pre-embedded at the location of each threaded hole, and the threaded hole is formed in the second embedded part.

[0010] The second embedded part is welded to the internal steel bars of the air duct bottom plate.

[0011] A first joint is formed between the sidewall of the air duct and the bottom plate of the air duct, and a first sealing component is provided in the first joint.

[0012] The first sealing assembly includes a first polyethylene rod and a first sealant, the first polyethylene rod being clamped within a first joint, and the first sealant sealing above and / or below the first polyethylene rod.

[0013] The width of the first seam is 2cm.

[0014] The duct base plate is composed of multiple sections, and a second joint is provided between adjacent sections of the duct base plate. A second sealing component is provided in the second joint.

[0015] The second sealing assembly includes a second polyethylene rod and a second sealant, the second polyethylene rod being clamped within the second joint, and the second sealant sealing above and / or below the second polyethylene rod.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] The underground tunnel track-top ventilation duct structure of this utility model is formed by integrally casting the ventilation duct sidewalls and the tunnel roof slab. Only the ventilation duct bottom plate needs to be installed later. When installing the ventilation duct bottom plate, the ventilation duct bottom plate is first lifted between the bottoms of the two ventilation duct sidewalls, and then the ventilation duct sidewalls and the ventilation duct bottom plate are fixed with bolts. Compared with the ventilation duct sidewalls being installed later, the overall construction and installation is convenient and the construction efficiency is high. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the underground tunnel track top ventilation duct structure of this utility model.

[0019] Figure 2 yes Figure 1 An enlarged structural diagram of point A.

[0020] Figure 3 This is a side view schematic diagram of the underground tunnel track top ventilation duct structure of this utility model.

[0021] Figure 4 This is a top view schematic diagram of the underground tunnel track top ventilation duct structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the second joint of the underground tunnel track top ventilation duct structure of this utility model.

[0023] Figure 6 This is a schematic diagram of the first embedded part of the underground tunnel track top ventilation duct structure of this utility model.

[0024] The labels in the diagram represent:

[0025] 1. Duct floor plate; 11. Second embedded part; 12. Second joint; 2. Duct sidewall; 21. First embedded part; 3. With tunnel roof plate; 4. Transverse perforation; 5. Threaded hole; 6. Fixing bolt; 7. First joint; 8. First sealing assembly; 81. First polyethylene rod; 82. First sealant; 9. Second sealing assembly; 91. Second polyethylene rod; 92. Second sealant. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Figures 1 to 6 This invention illustrates an embodiment of the underground tunnel track-top ventilation duct structure. The underground tunnel track-top ventilation duct structure of this embodiment includes a ventilation duct base plate 1 and two ventilation duct sidewalls 2. The two ventilation duct sidewalls 2 are integrally cast with the tunnel top plate 3 and arranged opposite to each other. The bottom of the ventilation duct sidewalls 2 is provided with a plurality of transverse through holes 4 arranged at intervals along the length direction. The ventilation duct base plate 1 is a prefabricated component. Both sides of the ventilation duct base plate 1 are provided with a plurality of threaded holes 5 arranged at intervals along the length direction. The threaded holes 5 on both sides of the ventilation duct base plate 1 are arranged in a one-to-one correspondence with the transverse through holes 4 of the two ventilation duct sidewalls 2. The corresponding transverse through holes 4 and threaded holes 5 are connected by fixing bolts 6.

[0031] The underground tunnel track top ventilation duct structure is formed by integrally casting the ventilation duct sidewall 2 and the tunnel top slab 3. Only the ventilation duct bottom plate 1 needs to be installed later. When installing the ventilation duct bottom plate 1, the ventilation duct bottom plate 1 is first lifted between the bottoms of the two ventilation duct sidewalls 2, and then the fixing bolts 6 are used to connect the ventilation duct sidewalls 2 and the ventilation duct bottom plate 1. The ventilation duct sidewalls 2 are installed later, which makes the overall construction and installation convenient and efficient.

[0032] Furthermore, such as Figure 2 As shown, in this embodiment, a first embedded part 21 is pre-embedded at the location of each transverse perforation 4 on the sidewall 2 of the air duct, and the transverse perforation 4 is formed in the first embedded part 21. This avoids the subsequent opening of holes from affecting the original structure of the sidewall 2 of the air duct.

[0033] Furthermore, such as Figure 2 As shown, in this embodiment, the internal steel bars of the air duct sidewall 2 are welded to the internal steel bars of the tunnel roof slab 3, and the first embedded part 21 is welded to the internal steel bars of the air duct sidewall 2 to improve the overall connection strength.

[0034] Furthermore, in this embodiment, a second embedded part 11 is pre-embedded at the location of each threaded hole 5 in the bottom plate 1 of the air duct, and the threaded hole 5 is formed in the second embedded part 11. This avoids the subsequent opening affecting the original structure of the side wall 2 of the air duct.

[0035] Furthermore, in this embodiment, the second embedded part 11 is welded to the internal steel bars of the air duct bottom plate 1 to improve the overall connection strength.

[0036] Furthermore, in this embodiment, a first joint 7 is formed between the duct sidewall 2 and the duct bottom plate 1, and a first sealing component 8 is provided within the first joint 7. The first joint 7 between the duct sidewall 2 and the duct bottom plate 1 facilitates the installation of the first sealing component 8 and improves the sealing performance.

[0037] Furthermore, in this embodiment, the first sealing assembly 8 includes a first polyethylene rod 81 and a first sealant 82. The first polyethylene rod 81 is clamped within the first seam 7, and the first sealant 82 seals above and / or below the first polyethylene rod 81. Preferably, the first seam 7 is 2 cm wide.

[0038] Furthermore, in this embodiment, the duct base plate 1 is composed of multiple segments, and a second joint 12 is provided between adjacent segments of the duct base plate 1. A second sealing component 9 is provided within the second joint 12. The second joint 12 between adjacent segments of the duct base plate 1 facilitates the installation of the second sealing component 9 and improves the sealing performance.

[0039] Furthermore, in this embodiment, the second sealing assembly 9 includes a second polyethylene rod 91 and a second sealant 92. The second polyethylene rod 91 is clamped within the second joint 12, and the second sealant 92 seals above and / or below the second polyethylene rod 91. Preferably, the second joint 12 is 2 cm wide.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A structure for a track-top ventilation duct in an underground tunnel, characterized in that: It includes a duct bottom plate (1) and two duct sidewalls (2). The two duct sidewalls (2) are integrally cast with the tunnel top plate (3) and arranged opposite to each other. The bottom of the duct sidewalls (2) is provided with multiple transverse perforations (4) arranged at intervals along the length direction. The duct bottom plate (1) is a precast component. Both sides of the duct bottom plate (1) are provided with multiple threaded holes (5) arranged at intervals along the length direction. The threaded holes (5) on both sides of the duct bottom plate (1) correspond one-to-one with the transverse perforations (4) of the two duct sidewalls (2). The corresponding transverse perforations (4) and threaded holes (5) are connected by fixing bolts (6).

2. The underground tunnel track-top ventilation duct structure according to claim 1, characterized in that: The sidewall (2) of the air duct is pre-embedded with a first embedded part (21) at the location of each transverse perforation (4), and the transverse perforation (4) is formed in the first embedded part (21).

3. The underground tunnel track-top ventilation duct structure according to claim 2, characterized in that: The internal steel bars of the ventilation duct sidewall (2) are welded to the internal steel bars of the tunnel roof slab (3), and the first embedded part (21) is welded to the internal steel bars of the ventilation duct sidewall (2).

4. The underground tunnel track-top ventilation duct structure according to claim 1, characterized in that: The bottom plate (1) of the air duct has a second embedded part (11) pre-embedded at the location of each threaded hole (5), and the threaded hole (5) is formed in the second embedded part (11).

5. The underground tunnel track-top ventilation duct structure according to claim 4, characterized in that: The second embedded part (11) is welded to the internal steel bars of the air duct bottom plate (1).

6. The underground tunnel track-top ventilation duct structure according to claim 1, characterized in that: A first joint (7) is formed between the side wall (2) of the air duct and the bottom plate (1) of the air duct, and a first sealing component (8) is provided in the first joint (7).

7. The underground tunnel track-top ventilation duct structure according to claim 6, characterized in that: The first sealing assembly (8) includes a first polyethylene rod (81) and a first sealant (82), the first polyethylene rod (81) being clamped within the first joint (7), and the first sealant (82) sealing above and / or below the first polyethylene rod (81).

8. The underground tunnel track-top ventilation duct structure according to claim 6, characterized in that: The first seam (7) is 2cm wide.

9. The underground tunnel track-top ventilation duct structure according to any one of claims 1 to 8, characterized in that: The duct bottom plate (1) is composed of multiple sections, and a second joint (12) is provided between adjacent sections of the duct bottom plate (1), and a second sealing component (9) is provided in the second joint (12).

10. The underground tunnel track-top ventilation duct structure according to claim 9, characterized in that: The second sealing assembly (9) includes a second polyethylene rod (91) and a second sealant (92), the second polyethylene rod (91) being clamped within the second joint (12), and the second sealant (92) sealing above and / or below the second polyethylene rod (91).

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