CN111271123A - Subway station prefabricated rail top air duct structure and construction method - Google Patents

Abstract

A prefabricated rail top air channel structure of a subway station and a construction method comprise a middle plate and the prefabricated rail top air channel structure, a plurality of through holes which are arranged at intervals and penetrate through the middle plate are reserved in the middle plate, a plurality of bolts which correspond to the through holes in a one-to-one mode are pre-buried in the prefabricated rail top air channel structure, screw rods of the bolts extend upwards from the prefabricated rail top air channel structure and penetrate through the corresponding through holes and are fixed on the middle plate through nuts, the through holes comprise first through holes which are located on the upper portion and have first apertures and second through holes which are located on the lower portion and have second apertures, the first apertures are larger than the second apertures, the nuts are located in the first through holes, and the diameters of the nuts are larger than the second apertures and smaller than. The invention overcomes the existing technical prejudice, well solves a series of defects of the original rail top air duct, has reliable quality, convenient construction, safety and economy, has good effects on scheme formulation, mature construction and risk control, and has the advantages of simple and easy operation, economy and reasonability, mature technology, wide prospect and good benefit.

Description

A kind of prefabricated rail top air duct structure and construction method of subway station

technical field

The invention relates to the field of construction, in particular to a prefabricated rail top air duct structure of a subway station and a construction method.

Background technique

The rail roof air duct of the subway station is a U-shaped structure suspended under the middle plate. As the secondary structure of the station, it is often necessary to re-install the scaffolding and formwork after the structural construction is completed. Retaining steel bars to connect with the mid-slab structure, because the construction space is small, and the formwork and pouring are affected by the mid-slab, the construction is time-consuming and laborious, and the construction quality is usually difficult to guarantee.

SUMMARY OF THE INVENTION

In view of the technical defects and technical drawbacks existing in the prior art, the embodiments of the present invention provide a prefabricated rail-top air duct structure and a construction method for a subway station that overcomes the above-mentioned problems or at least partially solves the above-mentioned problems. The specific solutions are as follows:

As a first aspect of the present invention, a prefabricated rail-top air duct structure for a subway station is provided, further comprising a prefabricated rail-top air duct structure installed under a middle plate, wherein a plurality of intervals are reserved in the middle plate and penetrate through the middle plate There are a plurality of bolts corresponding to the positions of the through holes in the prefabricated rail top air duct structure, and the nuts of the bolts are completely embedded in the prefabricated rail top air duct structure. The screw rod of the bolt extends upward from the prefabricated rail-top air duct structure and passes through the corresponding through hole, and is fixed on the middle plate by a nut, and the through hole includes a first through hole with a first hole diameter located at the upper part. and a second through hole with a second aperture located at the lower part, the first aperture is larger than the second aperture, the diameter of the nut is larger than the second aperture and smaller than the first aperture, the first through hole and the second aperture are A platform is formed at the transition of the through hole, and the nut is located in the first through hole and supported on the platform.

Further, the gap between the middle plate and the prefabricated rail-top air duct structure is filled with fine stone concrete.

Further, a pre-embedded steel plate is horizontally arranged at the upper end face of each second through hole, and the pre-embedded steel plate has a third through hole with the same size as the second through hole, and the third through hole is connected to the second through hole. Holes overlap.

Further, the first through hole is a first elongated hole, and the diameter of the nut is smaller than the width of the first elongated hole.

Further, the second through hole is a second elongated hole, and the diameter of the nut is larger than the width of the second elongated hole.

As a second aspect of the present invention, a construction method for a prefabricated rail-top air duct in a subway station is provided, the method comprising:

Reserving a plurality of intervals in the middle plate and passing through the through holes of the middle plate;

The prefabricated rail-top air duct structure as described in any of the above is prefabricated in the factory;

The prefabricated prefabricated rail-top air duct structure is transported under the middle plate, so that the screws of the bolts embedded in the prefabricated rail-top air duct structure pass upward through the corresponding through holes, and are fixed on the middle plate by nuts, so that the The prefabricated rail-top air duct structure is installed under the middle plate.

Further, the method further includes: after the installation of the prefabricated rail-top air duct structure is completed, pouring fine stone concrete in the gap between the middle plate and the prefabricated rail-top air duct structure.

Further, a pre-embedded steel plate is horizontally arranged at the upper end face of each second through hole, and the pre-embedded steel plate has a third through hole with the same size as the second through hole, and the third through hole is connected to the second through hole. Holes overlap.

Further, the first through hole is a first elongated hole, and the diameter of the nut is smaller than the width of the first elongated hole.

Further, the second through hole is a second elongated hole, and the diameter of the nut is larger than the width of the second elongated hole.

The present invention has the following beneficial effects:

The invention proposes a prefabricated rail-top air duct structure and a construction method, which overcomes the existing technical prejudice, well solves a series of shortcomings of the original rail-top air duct, has reliable quality, convenient construction, safety and economy, and is suitable for Scheme formulation, mature construction and risk control have a good effect. The method is simple and easy to implement, economical and reasonable, with mature technology, broad prospects and good benefits.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

1 is a plan layout diagram of a midplane provided by an embodiment of the present invention;

2 is a schematic structural diagram of a through hole provided by an embodiment of the present invention;

3 is a schematic diagram of the connection between the prefabricated rail top air duct structure and the middle plate provided by the embodiment of the present invention;

FIG. 4 is an enlarged schematic diagram of a node A according to an embodiment of the present invention;

Description of reference numerals: 1, middle plate, 2, prefabricated rail-top air duct structure, 3, node A, 4, nut, 11, through hole, 12, embedded steel plate, 111, first through hole, 112, second through hole Hole, 113, Platform, 21, Bolt.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figures 1-4, as the first embodiment of the present invention, a prefabricated rail-top air duct structure of a subway station is provided, which includes a middle plate 1 and a prefabricated rail-top air duct structure 2 installed under the middle plate 1. A plurality of through holes 11 are reserved in the middle plate 1 and pass through the middle plate 1, and a plurality of bolts 21 corresponding to the positions of the through holes 11 are pre-embedded in the prefabricated rail-top air duct structure 2. , as shown in FIG. 4 , which is an enlarged view of the node A3 in FIG. 3 , the nuts of the bolts 21 are completely embedded in the prefabricated rail top air duct structure 2 , and the screws of the bolts 21 are removed from the prefabricated rails. The top air duct structure 2 extends upwards and passes through the corresponding through holes 11, and is fixed on the middle plate 1 by the nuts 4. The through holes 11 include a first through hole 111 with a first The lower part has a second through hole 112 with a second hole diameter, the first hole diameter is larger than the second hole diameter, a platform 113 is formed at the transition of the first through hole 111 and the second through hole 112, and the nut 4 Located in the first through hole 111 and supported on the platform 113 , the diameter of the nut 4 is larger than the second hole diameter and smaller than the first hole diameter.

Preferably, fine stone concrete is poured in the gap between the middle plate 1 and the prefabricated rail-top air duct structure 2 .

The invention proposes a prefabricated rail-top air duct structure, which overcomes the existing technical prejudices, and well solves a series of shortcomings of the original rail-top air duct, and has reliable quality, convenient construction, safety and economy. Mature construction and risk control have a good effect. The method is simple and easy to implement, economical and reasonable, with mature technology, broad prospects and good benefits.

Preferably, a pre-embedded steel plate 12 is horizontally disposed on the upper end face of each second through hole 112 , and the pre-embedded steel plate 12 has a third through hole 11 with the same aperture size as the second through hole 112 . The hole 11 overlaps with the second through hole 112 , and by arranging the embedded steel plate 12 , the connection stability between the middle plate 1 and the prefabricated rail-top air duct structure 2 is provided.

Preferably, the first through hole 111 is a first elongated hole, the second through hole 112 is a second elongated hole, and the diameter of the nut 4 is smaller than the width of the first elongated hole and larger than the second elongated hole As for the width of the strip hole, by setting the through hole 11 in the shape of a long strip, it is beneficial to move and align left and right when the middle plate 1 is connected to the prefabricated rail-top air duct structure 2 .

As a second embodiment of the present invention, a construction method for a prefabricated rail-top air duct in a subway station is provided, the method comprising:

A plurality of intervals are reserved in the middle plate 1 and pass through the through holes 11 of the middle plate 1;

The prefabricated rail-top air duct structure 2 as described in any of the above is prefabricated in the factory;

The prefabricated rail top air duct structure 2 is transported to the middle plate 1, so that the screws of the bolts 21 embedded in the prefabricated rail top air duct structure 2 pass upward through the corresponding through holes 11, and are fixed to the on the middle plate 1 , so that the prefabricated rail-top air duct structure 2 is installed under the middle plate 1 .

Preferably, the method further includes: pouring fine stone concrete in the gap between the middle plate 1 and the prefabricated rail-top air duct structure 2 after the prefabricated rail-top air duct structure 2 is installed.

Preferably, a pre-embedded steel plate 12 is horizontally disposed on the upper end face of each second through hole 112 , and the pre-embedded steel plate 12 has a third through hole 11 with the same aperture size as the second through hole 112 . The hole 11 overlaps with the second through hole 112 .

Preferably, the first through hole 111 is a first elongated hole, and the diameter of the nut 4 is smaller than the width of the first elongated hole.

Preferably, the second through hole 112 is a second elongated hole, and the diameter of the nut 4 is larger than the width of the second elongated hole.

In the present invention, the middle plate 1 reserves a plurality of spaced elongated through holes 11 during construction, and at the same time pre-embeds steel plates 12 at the bottom of the elongated holes; the prefabricated rail top air duct structure 2 is segmented in the factory, and at the same time the prefabricated rail top air duct Bolts 21 are pre-embedded in structure 2, and finally the rail top air duct is hoisted in sections below the middle plate 1. After being fixed by nuts 4, fine stone concrete is filled in the gap, which solves a series of shortcomings of the original rail top air duct and has reliable quality. The construction is convenient, safe and economical, and has a good effect on the formulation of plans, mature construction and risk control. The method is simple and easy to implement, economical and reasonable, with mature technology, broad prospects and good benefits.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. A prefabricated rail-top air duct structure of a subway station, comprising a middle plate, is characterized in that, also comprising a prefabricated rail-top air duct structure installed under the middle plate, wherein a plurality of intervals are reserved in the middle plate and run through the middle plate. The prefabricated rail top air duct structure is pre-buried with a plurality of bolts corresponding to the positions of the through holes, and the nuts of the bolts are completely pre-buried in the prefabricated rail top air duct structure, so The screw rod of the bolt extends upward from the prefabricated rail top air duct structure and passes through the corresponding through hole, and is fixed on the middle plate by a nut. A hole and a second through hole with a second hole diameter located at the lower part, the first hole diameter is larger than the second hole diameter, the diameter of the nut is larger than the second hole diameter and smaller than the first hole diameter, the first through hole and the first hole diameter are larger than the second hole diameter. A platform is formed at the transition of the two through holes, and the nut is located in the first through hole and supported on the platform. 2 . The prefabricated rail top air duct structure of a subway station according to claim 1 , wherein the gap between the middle plate and the prefabricated rail top air duct structure is filled with fine stone concrete. 3 . 3 . The prefabricated rail-top air duct structure of a subway station according to claim 1 , wherein a pre-embedded steel plate is horizontally arranged at the upper end face of each second through hole, and the pre-embedded steel plate has the same diameter as that of the second through hole. 4 . A third through hole with the same size, the third through hole overlaps with the second through hole. 4 . The prefabricated rail-top air duct structure of a subway station according to claim 1 , wherein the first through hole is a first elongated hole, and the diameter of the nut is smaller than the width of the first elongated hole. 5 . 5 . The prefabricated rail top air duct structure of a subway station according to claim 1 , wherein the second through hole is a second elongated hole, and the diameter of the nut is larger than the width of the second elongated hole. 6 . 6. A construction method for a prefabricated rail-top air duct in a subway station, wherein the method comprises: Reserving a plurality of intervals in the middle plate and passing through the through holes of the middle plate; The prefabricated rail-top air duct structure according to any one of claims 1-5 is prefabricated in the factory; The prefabricated prefabricated rail-top air duct structure is transported under the middle plate, so that the screws of the bolts embedded in the prefabricated rail-top air duct structure pass upward through the corresponding through holes, and are fixed on the middle plate by nuts, so that the The prefabricated rail-top air duct structure is installed under the middle plate. 7 . The construction method of the prefabricated rail top air duct in a subway station according to claim 6 , wherein the method further comprises: after the installation of the prefabricated rail top air duct structure is completed, the middle plate and the prefabricated rail top air duct are installed. Fine stone concrete is poured in the gaps between the structures. 8 . The construction method of the prefabricated rail-top air duct of a subway station according to claim 6 , wherein a pre-embedded steel plate is horizontally arranged at the upper end face of each second through hole, and the embedded steel plate has a connection with the second through hole. 9 . A third through hole with the same hole diameter, the third through hole overlaps with the second through hole. 9 . The construction method of the prefabricated rail top air duct of a subway station according to claim 6 , wherein the first through hole is a first elongated hole, and the diameter of the nut is smaller than the width of the first elongated hole. 10 . 10 . The construction method of the prefabricated rail top air duct in a subway station according to claim 6 , wherein the second through hole is a second elongated hole, and the diameter of the nut is larger than the width of the second elongated hole. 11 .

Images