CN114322281A

CN114322281A - Prefabricated rail top wind channel device of assembled

Info

Publication number: CN114322281A
Application number: CN202111470816.7A
Authority: CN
Inventors: 王天; 徐波; 周剑; 余贵良; 丁玉宝; 娄卫校
Original assignee: China Railway Construction South China Construction Co Ltd
Current assignee: China Railway Construction South China Construction Co Ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-04-12

Abstract

The invention relates to an assembled prefabricated rail top air duct device, which comprises: the supporting structure comprises a precast beam, a first precast column and a second precast column, the first precast column and the second precast column are respectively arranged at two opposite ends of the precast beam, the first precast column, the second precast column and the second precast beam are surrounded to form an installation cavity, and the first precast column and the second precast column are used for being assembled and fixed with the rail top middle plate; and the air duct body is arranged in the mounting cavity. During installation, the first prefabricated column and the second prefabricated column are assembled and fixed with the rail top middle plate, the prefabricated beam is connected with the first prefabricated column and the second prefabricated column respectively to form an installation cavity, the air duct body is arranged in the installation cavity, and the air duct body can be supported and fixed by the supporting structure, so that the prefabricated air duct is fixedly installed, the whole installation and construction period is short, the construction process is simple, the construction risk is low, the construction quality is good in controllability, and the service life and the reliability are high.

Description

Prefabricated rail top wind channel device of assembled

Technical Field

The invention relates to the technical field of subway ventilation equipment, in particular to an assembled prefabricated rail top air duct device.

Background

In recent years, with the acceleration of urbanization process in China, urban traffic is under greater and greater pressure. Underground rail transit (such as subway) is used as a fast, on-time, large-traffic and pollution-free green transportation mode, and accords with the principle of sustainable development, so that the domestic subway construction is in a new period of vigorous development, and the scale is continuously enlarged. In order to create a safe and high-quality service environment, the problem of heat dissipation of trains needs to be solved, a good air supply and exhaust system needs to be established for subways, and a rail top air duct (train top exhaust duct) is an indispensable component of a ventilation system of a subway station.

The station rail top air duct is divided into a cast-in-place mode and a prefabrication mode, and at present, the domestic prefabricated rail top air duct mainly adopts a cast-in-place reinforced concrete rail top air duct. For example, most of domestic subways adopt post-cast concrete rail top air channels, and most of underground stations adopt a shield technology, so that the post-cast concrete rail top air channels cannot be cast simultaneously with a station main body due to the particularity of the positions of the rail top air channels and can be cast only at a later stage. The post-pouring method for building the reinforced concrete track air duct has the following problems: the civil construction of the station needs secondary approach, often needs to occupy the installation time of electromechanical equipment in the later period, and directly influences the whole line opening period; due to the fact that the construction space of the post-cast rail top air duct is narrow, the concrete vibrator is very easy to collide with the reserved hole model and various embedded parts, the quality of a main body structure is affected, and the quality problems of the air duct embedded parts and the reserved holes are easily left; concrete and edges are often damaged due to form removal, the surface of the air duct is difficult to smooth, and gaps are easily formed at the joints of the air duct hanging walls and the main body structure. Therefore, the construction of the rail top air duct by adopting the post-pouring method has the problems of long construction period, complex construction process, high construction risk, high construction quality control difficulty and the like. In addition, the steel structure rail top air channel is adopted in individual subway construction projects in China, but the problems of easiness in corrosion, short service life and poor reliability of the steel structure exist, and great hidden danger exists in later maintenance and replacement.

Disclosure of Invention

Based on this, it is necessary to provide an assembled prefabricated rail top air duct device, and aim at solving the problems that the prior art has long construction period, complex construction process, large construction risk, large construction quality control difficulty, and poor service life and reliability.

The application provides prefabricated rail top air duct device of assembled, prefabricated rail top air duct device of assembled includes:

the supporting structure comprises a precast beam, a first precast column and a second precast column, the first precast column and the second precast column are respectively arranged at two opposite ends of the precast beam, the first precast column, the second precast column and the second precast beam are surrounded to form an installation cavity, and the first precast column and the second precast column are used for being assembled and fixed with a rail top middle plate; and

the air duct body is arranged in the mounting cavity.

The prefabricated wind channel device of assembled of this scheme is used and is equipped in subway tunnel, specifically installs in the rail top position, plays air supply and exhaust effect to dispel the heat to the train, guarantee train operation safety. Before installation, the three components of the precast beam, the first precast column and the second precast column which form the supporting structure can be precast and molded in a factory firstly and then are transported to an installation site for direct use, on-site pouring construction is not needed, secondary approach of station civil engineering construction is not needed, the occupation of later-stage electromechanical equipment installation time is avoided, and the whole-line opening construction period is ensured; in addition, because the on-site pouring construction is not needed, the concrete vibrator can not collide with a reserved hole model and various embedded parts, the quality of a main body structure is not influenced, and the quality problems of air duct embedded parts and reserved holes are easily left; concrete and edges are often damaged due to form removal, the surface of the air duct is difficult to smooth, and gaps are easily formed at the joints of the air duct hanging walls and the main body structure. During installation, the first prefabricated column and the second prefabricated column are assembled and fixed with the rail top middle plate, the prefabricated beam is connected with the first prefabricated column and the second prefabricated column respectively to form an installation cavity, the air duct body is arranged in the installation cavity, and the air duct body can be supported and fixed by the supporting structure, so that the prefabricated air duct is fixedly installed, the whole installation and construction period is short, the construction process is simple, the construction risk is low, the construction quality is good in controllability, and the service life and the reliability are high.

The technical solution of the present application is further described below:

in one embodiment, the first ends of the first prefabricated column and the second prefabricated column are respectively provided with a slot, and the opposite ends of the prefabricated beam are respectively provided with a plugboard which is inserted into the slots for fixing.

In one embodiment, the first prefabricated column and the second prefabricated column are further provided with a threaded hole communicated with the slot, the plug board is provided with a jack opposite to the threaded hole, a threaded part is screwed in the threaded hole, and the end part of the threaded part is inserted into the jack.

In one embodiment, connecting columns are convexly arranged on second ends, far away from the precast beam, of the first precast column and the second precast column, and are used for being inserted and fixed in assembling holes formed in the rail top middle plate.

In one embodiment, the outer wall of the connecting column is provided with a thread structure, the connecting column penetrates through the tail end of the assembling hole and then is sequentially connected with a base plate and a locking nut, and the base plate is fastened and fixed on the side face, far away from the first prefabricated column and the second prefabricated column, of the rail top middle plate.

In one embodiment, a filling cavity is formed between the connecting column and the hole wall of the assembly hole at an interval, and ultrahigh-performance concrete is poured in the filling cavity.

In one embodiment, the air duct body is formed into a hollow cylinder with two ends penetrating through, and the side walls of the two opposite open ends of the air duct body are provided with thickening layers.

In one embodiment, the prefabricated rail top air duct device further comprises a first rubber pad and a double-sided adhesive tape, the first rubber pad is arranged between the prefabricated beam and the air duct body, and the double-sided adhesive tape is adhered between the air duct body and the first rubber pad and between the first rubber pad and the prefabricated beam.

In one embodiment, the bottom wall of the air duct body is concavely provided with a positioning groove, the side wall of the precast beam facing the air duct body is convexly provided with a positioning block, and the positioning block is inserted into the positioning groove.

In one embodiment, the prefabricated rail top air duct device further comprises a second rubber pad and a fastening plate, the second rubber pad abuts against between the air duct body and the first prefabricated column, and the fastening plate is fixedly connected with the air duct body and the second prefabricated column respectively.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an assembled prefabricated rail top air duct device assembled in a rail top middle plate according to the present application;

FIG. 2 is a schematic structural diagram of an assembled prefabricated rail top air duct device in the present application;

FIG. 3 is a partial assembled cross-sectional view of the support structure and the rail head plate of the present application;

FIG. 4 is a schematic structural view of a support structure of the present application;

fig. 5 is a schematic structural view of a precast beam in the present application;

FIG. 6 is a schematic structural view of a first prefabricated column of the present application;

FIG. 7 is a schematic structural view of the air duct body according to the present application;

FIG. 8 is the structure view of the air duct body assembled with the precast beam through the first rubber pad in the present application.

Description of reference numerals:

100. the prefabricated rail top air duct device is assembled; 10. a support structure; 11. prefabricating a beam; 111. positioning blocks; 12. a first precast column; 121. a slot; 122. a threaded hole; 13. a second precast column; 14. a mounting cavity; 15. a plugboard; 151. a jack; 16. connecting columns; 20. an air duct body; 21. thickening the layer; 22. positioning a groove; 30. a base plate; 40. locking the nut; 50. filling the cavity; 60. a first rubber pad; 70. a second rubber pad; 80. a fastening plate; 200. a rail top middle plate; 300. ultra-high performance concrete.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 and fig. 2, an assembled prefabricated rail top air duct device 100 shown for an embodiment of the present application is provided in a subway tunnel, specifically installed at a rail top position, specifically configured to be connected with a rail top middle plate 200, and plays a role in air supply and air exhaust, so as to dissipate heat of a train and ensure the safety of the train operation.

Illustratively, the fabricated pre-fabricated rail air duct assembly 100 includes: a support structure 10 and a duct body 20. The supporting structure 10 comprises a precast beam 11, a first precast column 12 and a second precast column 13, the first precast column 12 and the second precast column 13 are respectively arranged at two opposite ends of the precast beam 11, an installation cavity 14 is formed by the first precast column 12, the second precast column 13 and the second precast beam 11 in an enclosing manner, and the first precast column 12 and the second precast column 13 are used for being assembled and fixed with the rail top middle plate 200; the air duct body 20 is disposed in the mounting cavity 14.

It should be noted that a minimum component unit of the rail-top air duct device includes a cutoff duct body 20 and two support structures 10. Two of the supporting structures 10 are respectively supported and disposed at two ends of the air duct body 20 in the length direction (i.e. two ends along the airflow flowing direction). In actual construction, a plurality of the minimum composition units need to be continuously spliced along the length direction of the tunnel. Fig. 1 and fig. 2 show a schematic structural diagram of two minimum component units spliced together.

With reference to fig. 3 to fig. 6, in summary, the following advantages are achieved by the technical solution of the present embodiment: before installation, the three components of the precast beam 11, the first precast column 12 and the second precast column 13 which form the support structure 10 can be precast and molded in a factory and then are directly used after being transported to an installation site, on-site pouring construction is not needed, secondary approach of station civil engineering construction is not needed, occupation of later-stage electromechanical equipment installation time is avoided, and the whole-line opening period is guaranteed; in addition, because the on-site pouring construction is not needed, the concrete vibrator can not collide with a reserved hole model and various embedded parts, the quality of a main body structure is not influenced, and the quality problems of air duct embedded parts and reserved holes are easily left; concrete and edges are often damaged due to form removal, the surface of the air duct is difficult to smooth, and gaps are easily formed at the joints of the air duct hanging walls and the main body structure.

During installation, the first prefabricated column 12 and the second prefabricated column 13 are assembled and fixed with the rail top middle plate 200, the prefabricated beam 11 is connected with the first prefabricated column 12 and the second prefabricated column 13 respectively to form an installation cavity 14, finally, the air duct body 20 is arranged in the installation cavity 14, and the air duct body 20 is supported and fixed by the supporting structure 10, so that the prefabricated air duct is installed and fixed.

In this scheme, bearing structure 10 specifically is a hanging mechanism for hang wind channel body 20 at the track top. In some embodiments, a connecting column 16 is convexly disposed at a second end of each of the first prefabricated column 12 and the second prefabricated column 13, the second end being away from the prefabricated beam 11, and the connecting column 16 is used for being inserted and fixed in a mounting hole formed in the rail top middle plate 200. Through the splicing of the connecting column 16 and the assembling hole of the rail top middle plate 200, the first prefabricated column 12 and the second prefabricated column 13 can be installed and fixed on the rail top to form an installation foundation, and the subsequent assembling of the prefabricated beam 11 is facilitated.

With reference to fig. 3, in order to ensure that the first prefabricated column 12 and the second prefabricated column 13 are installed stably, they are not easy to fall off from the rail top under the weight of the air duct body 20. In some embodiments, the outer wall of the connecting column 16 is provided with a thread structure, the connecting column 16 passes through the end of the assembling hole and then is sequentially connected with a backing plate 30 and a locking nut 40, and the backing plate 30 is fastened and fixed on the side of the rail top middle plate 200 far away from the first prefabricated column 12 and the second prefabricated column 13. Because the lock nut 40 is screwed with the threaded section of the connecting column 16, and the backing plate 30 is clamped between the lock nut 40 and the end orifice of the assembly hole, the connecting column 16 and the rail top middle plate 200 can be locked and fixed, and the installation strength of the first prefabricated column 12 and the second prefabricated column 13 and the supporting capacity of the air duct body 20 are improved.

In addition, on the basis of the above embodiment, a filling cavity 50 is formed between the connecting column 16 and the wall of the assembly hole at an interval, and the ultra-high performance concrete 300 is poured into the filling cavity 50. The ultra-high performance concrete 300 injected into the filling cavity 50 can be simultaneously solidified with the connecting column 16 and the rail top middle plate 200 into a whole, so that a double anchoring effect can be formed with the locking nut 40 at the end part of the connecting column 16, and the installation stability and reliability of the first prefabricated column 12 and the second prefabricated column 13 are further enhanced.

With reference to fig. 4 to 6, in some embodiments, the first end of each of the first precast column 12 and the second precast column 13 is provided with a slot 121, the opposite ends of the precast beam 11 are provided with the insertion plates 15, and the insertion plates 15 are inserted into the slots 121 and fixed. In this embodiment, the first precast column 12 and the second precast column 13 are both square columns, one side surface of each square column is concavely provided with an insertion slot 121, and after the insertion plates 15 at the two opposite ends of the precast beam 11 are respectively inserted into the two insertion slots 121, the insertion plates 15 generate friction with the slot walls of the insertion slots 121, so that the precast beam 11 is assembled, connected and fixed with the first precast column 12 and the second precast column 13.

However, since the air duct body 20 is prefabricated and formed by concrete, the air duct body has a large weight, and the insertion plate 15 is easily deformed and separated from the insertion slot 121 under a long-term heavy-load working condition, so that the precast beam 11 falls off. In view of this, in some other embodiments, the first prefabricated column 12 and the second prefabricated column 13 further open a threaded hole 122 communicating with the insertion slot 121, the insertion plate 15 opens an insertion hole 151 opposite to the threaded hole 122, a threaded member is screwed into the threaded hole 122, and an end of the threaded member is inserted into the insertion hole 151. Therefore, the screw member sequentially penetrates into the screw hole 122 and the insertion hole 151, so as to form a locking effect on the insertion plate 15, thereby achieving the purpose of preventing the insertion plate 15 from being disengaged from the slot 121. And the threaded part and the threaded hole 122 have self-locking capability, so that the stability and reliability of the locking structure are ensured.

It should be noted that after the above components are installed in place, the openings of the threaded holes 122 and the notches of the slots 121 need to be sealed by cement mortar, so as to prevent the metal parts from being exposed, and prevent the corrosion of damp air and the loosening and falling of the threaded components.

With reference to fig. 7, since the main function of the air duct body 20 is to allow air to circulate inside the air duct body to dissipate heat of the train, in some embodiments, the air duct body 20 is formed as a hollow cylinder with two ends penetrating through. Specifically, the duct body 20 in the present embodiment is a rectangular cylinder. Of course, other embodiments may be a cylindrical barrel or the like.

During actual construction, a plurality of air duct bodies 20 need to be spliced end to end in sequence along the tunnel direction, and the side walls of the two opposite open ends of the air duct bodies 20 are provided with thickening layers 21. The thickening layer 21 can effectively increase the rigid boundary of the air duct body 20, and ensure that two adjacent air duct bodies 20 are firmly and reliably spliced. For example, in the embodiment, the wall thickness of the main body of the air duct body 20 is 30mm, the wall thickness of the thickening layer 21 is 70mm, the length of the single air duct body 20 is 2.5m, and the weight is about 1.6T.

Referring to fig. 8, in the present embodiment, the air duct body 20 is assembled and fixed in the installation cavity 14 by inserting, specifically, the air duct body 20 is directly pressed on the precast beam 11. In some embodiments, the prefabricated rail top air duct device 100 further includes a first rubber pad 60 and a double-sided adhesive tape, the first rubber pad 60 is disposed between the prefabricated beam 11 and the air duct body 20, and the double-sided adhesive tape is adhered between the air duct body 20 and the first rubber pad 60 and between the first rubber pad 60 and the prefabricated beam 11. The arrangement of the first rubber pad 60 can avoid the damage easily caused by the direct rigid contact between the air duct body 20 and the precast beam 11, and has a certain vibration and noise reduction effect (unstable airflow can generate vibration and wind noise when flowing at high speed in the air duct body 20). The double-sided adhesive tape can provide bonding force, so that the first rubber pad 60 is firmly connected with the precast beam 11 and the air duct body 20, and displacement and even falling off caused by vibration are avoided.

With reference to fig. 2, fig. 4 and fig. 7, further, a positioning groove 22 is concavely disposed on the bottom wall of the air duct body 20, a positioning block 111 is convexly disposed on the side wall of the precast beam 11 facing the air duct body 20, and the positioning block 111 is inserted into the positioning groove 22. The positioning block 111 is inserted into the positioning groove 22 to form a positioning structure, which can effectively limit the degree of freedom of the air duct body 20, and ensure the accuracy and stability of the installation position of the air duct body 20.

With reference to fig. 2, in addition, in order to further ensure the reliable assembly of the air duct body 20 and the supporting structure 10, in some embodiments, the prefabricated rail-top air duct device 100 further includes a second rubber pad 70 and a fastening plate 80, the second rubber pad 70 abuts between the air duct body 20 and the first prefabricated column 12, and the fastening plate 80 is fixedly connected to the air duct body 20 and the second prefabricated column 13, respectively. The second rubber pad 70 has a lateral positioning effect on the air duct body 20, and the second rubber pad 70 is in flexible contact with the air duct body 20, so that rigid extrusion damage is avoided, and meanwhile, the vibration-damping and noise-eliminating effects are achieved. And the fastening plate 80 is used for realizing the rigid connection between the air duct body 20 and the second prefabricated column 13, and improving the installation strength of the air duct body 20. Alternatively, the fastening plate 80 and the air duct body 20 may be fixed by any one of screwing, snapping, and the like.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. An assembled prefabricated rail top air duct device, characterized in that, assembled prefabricated rail top air duct device includes:

the air duct body is arranged in the mounting cavity.

2. The prefabricated rail top air duct device of claim 1, wherein slots are formed in first ends of the first prefabricated column and the second prefabricated column, insertion plates are arranged at two opposite ends of the prefabricated beam, and the insertion plates are inserted into the slots and fixed.

3. The prefabricated rail air duct jacking device according to claim 2, wherein the first prefabricated column and the second prefabricated column are further provided with threaded holes communicated with the insertion grooves, the insertion plate is provided with insertion holes opposite to the threaded holes, the threaded parts are screwed in the threaded holes, and the end parts of the threaded parts are inserted into the insertion holes.

4. The assembly type prefabricated rail top air duct device according to claim 1, wherein a connecting column is convexly arranged at a second end, away from the prefabricated beam, of each of the first prefabricated column and the second prefabricated column, and is used for being inserted and fixed into a mounting hole formed in the rail top middle plate.

5. The prefabricated rail top air duct device of claim 4, wherein the outer wall of the connecting column is provided with a thread structure, the connecting column penetrates through the tail end of the assembling hole and then is sequentially connected with a base plate and a locking nut, and the base plate is fastened and fixed on the side surface, away from the first prefabricated column and the second prefabricated column, of the rail top middle plate.

6. The prefabricated rail top air duct device according to claim 4, wherein a filling cavity is formed between the connecting column and the wall of the assembling hole at intervals, and ultrahigh-performance concrete is poured into the filling cavity.

7. The fabricated precast rail air duct jacking device according to claim 1, wherein the air duct body is formed as a hollow cylinder body with both ends penetrating therethrough, and side walls of opposite open ends of the air duct body are provided with thickened layers.

8. The prefabricated rail top air duct device according to claim 1, further comprising a first rubber pad and a double-faced adhesive tape, wherein the first rubber pad is disposed between the prefabricated beam and the air duct body, and the double-faced adhesive tape is bonded between the air duct body and the first rubber pad and between the first rubber pad and the prefabricated beam.

9. The prefabricated rail-top air duct device according to claim 1, wherein a positioning groove is concavely formed in the bottom wall of the air duct body, a positioning block is convexly formed on the side wall of the prefabricated beam facing the air duct body, and the positioning block is inserted into the positioning groove.

10. The prefabricated rail-top air duct device according to claim 1, further comprising a second rubber pad and a fastening plate, wherein the second rubber pad abuts against the air duct body and the first prefabricated column, and the fastening plate is fixedly connected with the air duct body and the second prefabricated column respectively.