A fully enclosed sound barrier ceiling for rail transit and its construction process

Abstract

The present application relates to a fully enclosed rail transit sound barrier ceiling and construction process, belonging to the field of sound barrier installation technology, including lateral barriers and top barriers, each of which includes a plurality of mutually parallel steel beams, the steel beams being in an I-shape, and the plurality of mutually parallel steel beams being arranged at intervals, with a plurality of longitudinal supports being provided between adjacent steel beams, the longitudinal supports having a length perpendicular to the length of the steel beams, and sound-absorbing panels being provided on the longitudinal supports. The steel beam ends of the lateral barriers and top barriers abut against each other, and the sound barrier further includes a plurality of connecting plates, the connecting plates being located at and covering the steel beam joints, the connecting plates and the steel beams both being provided with a plurality of first strip holes for bolts to pass through, the first strip holes being in a cross shape, the two first strip holes being parallel to and perpendicular to the length of the steel beams, respectively. The present application has the effect of improving the installation efficiency of the sound barrier.

Description

Technical Field

[0001] The present application relates to the technical field of sound barrier installation, and in particular to a fully enclosed sound barrier ceiling for rail transit and its construction process. Background Art

[0002] With the advancement of society and the development of cities, people's living standards continue to improve, and urban traffic has become a crucial issue for us. The construction of numerous highways and the opening of urban light rail lines have greatly facilitated our travel, but at the same time, residents living near these highways and light rail lines endure the impact of traffic noise. To improve the living environment, relevant departments have installed various sound-absorbing barriers on both sides of roads and around light rail lines. Fully enclosed sound barriers are an effective noise reduction measure for ground-floor, high-rise, and higher-rise buildings. Fully enclosed sound barriers typically feature portal or circular frames.

[0003] The portal frame sound barrier mainly includes lateral barriers located on both sides of the center line of the track and top barriers located between the two lateral barriers. Multiple bolts are used to connect the lateral barriers and the top barriers.

[0004] Regarding the above-mentioned related technologies, the inventors believe that the following defects exist: when the lateral barriers and the top barriers are connected using bolts, there are a small number of bolts that cannot be aligned with the bolt spaces, resulting in the need to re-drill holes, resulting in low installation efficiency of the sound barrier. Summary of the Invention

[0005] In order to improve the installation efficiency of sound barriers, the present application provides a fully enclosed sound barrier ceiling and construction process for rail transit.

[0006] In the first aspect, the present application provides a fully enclosed rail transit sound barrier ceiling, which adopts the following technical solutions:

[0007] A fully enclosed sound barrier ceiling for rail transit, including lateral barriers and top barriers, each of which includes a plurality of mutually parallel steel beams, the steel beams being in an I-shape, the plurality of mutually parallel steel beams being arranged at intervals, a plurality of longitudinal supports being arranged between adjacent steel beams, the length direction of the longitudinal supports being perpendicular to the length direction of the steel beams, sound-absorbing panels being arranged on the longitudinal supports, the steel beam ends of the lateral barriers and the top barrier being abutted against each other, the sound barrier also including a plurality of connecting plates, the connecting plates being located at and covering the steel beam joints, a plurality of first strip holes for bolts to pass through being opened on the connecting plates and the steel beams, the first strip holes being cross-shaped, the two holes of the first strip holes being parallel to and perpendicular to the length direction of the steel beams, respectively.

[0008] By adopting the above technical solution, when installing the lateral barriers and the top barrier, the top barrier is hoisted until it abuts against the lateral barriers, and the ends of the steel beams of the lateral barriers and the top barrier abut against each other, and then the connecting plate is installed at the joint of the steel beam so that the connecting plate clamps the joint of the steel beam. Then the bolt is moved into the first strip hole, and the nut is screwed into the bolt so that the end of the bolt and the nut abut against the plate surface of the connecting plate respectively, completing the steel beam connection operation; because the first strip hole is cross-shaped, the probability of alignment between the first strip hole on the connecting plate and the first strip hole on the steel beam is increased, thereby facilitating the bolt to pass through the first strip hole on the connecting plate and the steel beam, thereby facilitating the bolt to steel beam connection operation, thereby improving the installation efficiency of the sound barrier; at the same time, the high bolt alignment efficiency reduces the time workers spend working at heights and improves the safety of workers.

[0009] Optionally, the steel beam includes a middle plate and side plates arranged on both sides of the middle plate, the middle plate is perpendicular to the side plates, and the connecting plates are respectively located on both sides of the middle plate and the side plates for clamping the middle plate and the side plates.

[0010] By adopting the above technical solution, the connecting plates are respectively located on both sides of the middle plate and the side plates, and clamp the middle plate and the side plates respectively, so that the connecting plates can clamp and fix each surface of the steel beam, thereby improving the connection performance of the steel beam and thereby improving the stability of the sound barrier.

[0011] Optionally, a second strip hole for bolt connection of the sound absorbing plate is opened on the steel beam facing the top barrier, and the length direction of the second strip hole is parallel to the length direction of the steel beam.

[0012] By adopting the above technical solution, under the action of the second strip-shaped hole, it is easy for the bolts to pass through the sound-absorbing plate and the steel beam, thereby facilitating the installation of the sound-absorbing plate.

[0013] Optionally, a plurality of sliding grooves are provided in the connecting plate, and the sliding grooves are connected to the two formed holes of the first strip hole. A slider is slidingly provided in the sliding groove, and the slider slides against the side wall of the bolt, and a fixing part is provided on the connecting plate for fixing the slider against the side wall of the bolt.

[0014] By adopting the above technical solution, after the connecting plate clamps the steel beam, the screw rod of the bolt is in the first strip hole and is not effectively fixed, which causes the connecting plate to slide on the steel beam when the track is running, thereby affecting the stability of the sound barrier; after the bolt enters the first strip hole, the slider is slid, the slider abuts on the screw rod of the bolt, and then the slider is fixed in the above position by the fixing part, thereby fixing the relative position of the screw rod and the connecting plate, thereby reducing the possibility of shaking of the connecting plate and improving the stability of the sound barrier.

[0015] Optionally, the connecting plate is provided with a spring in the slide groove, and the spring is located between the slider and the bottom wall of the slide groove.

[0016] By adopting the above technical solution, the bolt enters the first strip hole, and under the action of the spring force, the slider is driven to slide toward the direction of the bolt screw, so that the end of the slider abuts against the bolt screw, and the operation is simple and convenient; at the same time, under the action of the spring force, it is easy to drive the slider to slide to the maximum displacement, so that the slider abuts against the bolt screw, thereby ensuring the subsequent fixing effect of the slider on the bolt.

[0017] Optionally, the end surface of the sliding block away from the bottom wall of the sliding groove is inclined toward the direction away from the bottom wall of the sliding groove, and is inclined toward the surface of the bolt entering the first strip hole.

[0018] By adopting the above technical solution, the end of the slider abutting the bolt screw is tilted, which makes it easy for the bolt to enter the first strip hole through the inclined surface, thereby facilitating the bolt connection operation on the steel beam.

[0019] Optionally, the fixing member includes a plurality of screws threadedly connected to the connecting plate, the threaded holes on the connecting plate for the screws to be threadedly connected are connected to the sliding groove, and the ends of the screws located in the sliding groove abut against the upper surface of the slider.

[0020] By adopting the above technical solution, when fixing the slider, the screw is turned, the end of the screw enters the slide groove and abuts against the upper surface of the slider, thereby fixing the slider in the above position, and the operation is simple and convenient.

[0021] Optionally, a third strip-shaped hole is opened on the slider, the length direction of the third strip-shaped hole is parallel to the length direction of the slider, and the third strip-shaped hole passes through the slider.

[0022] By adopting the above technical solution, under the action of the third strip hole, it is convenient to observe the position of the first strip hole on the steel beam through the third strip hole, thereby facilitating the alignment of the first strip hole on the connecting plate with the first strip hole on the steel beam.

[0023] Optionally, a reinforcement rod is provided on the surface of the connecting plate facing away from the steel beam, the reinforcement rod is perpendicular to the plane where the joint of the steel beam is located, and the reinforcement rod is staggered with the first strip hole.

[0024] By adopting the above technical solution, under the action of the reinforcement rod, the possibility of bending of the connecting plate is reduced, and the fixing effect of the connecting plate on the steel beam is improved.

[0025] Secondly, this application provides a construction process for a fully enclosed sound barrier ceiling for rail transit, which adopts the following technical solutions:

[0026] Optionally, a construction process for a fully enclosed rail transit sound barrier ceiling, using a fully enclosed rail transit sound barrier ceiling, further comprising:

[0027] S1: Lateral barrier splicing and installation: First, assemble two spans of three steel beams on the ground frame. Then, install the longitudinal support structure between adjacent steel beams. Finally, install the sound-absorbing panels on the longitudinal supports to complete the splicing of the lateral barriers.

[0028] S2: Top barrier splicing and installation: assemble two spans of three steel beams on the ground frame, then install the longitudinal support keels between adjacent steel beams, and finally install the sound-absorbing panels on the longitudinal support keels;

[0029] S3: Hoisting and installing the lateral barriers: hoist the lateral barriers to both sides of the track and fix them to the embedded parts on both sides of the track with column bolts;

[0030] S4: Splice and install the top barrier. Hoist the top barrier between the two side barriers, then lower the top barrier so that the steel beams of the top barrier and the side barriers face each other and are locked together.

[0031] S5: Install the connecting plate at the joint of the top barrier and the lateral barrier steel beams, adjust the position of the connecting plate so that the first strip hole on the connecting plate is aligned with the first strip hole on the steel beam, insert the bolt into the first strip hole, lock the connecting plate on the steel beam, and complete the splicing and installation of the steel beam.

[0032] By adopting the above technical solution, the lateral barriers and the top barriers are assembled and spliced on the ground, which reduces the time workers spend working at heights and thus improves the safety of workers.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. When installing the lateral and top barriers, hoist the top barrier until it abuts against the lateral barriers, and make the ends of the steel beams of the lateral and top barriers abut against each other. Then install the connecting plate at the joint of the steel beam so that the connecting plate clamps the joint of the steel beam. Then move the bolt into the first strip hole and screw the nut on the bolt so that the end of the bolt and the nut abut against the plate surface of the connecting plate respectively, completing the steel beam connection operation. Because the first strip hole is cross-shaped, the probability of alignment between the first strip hole on the connecting plate and the first strip hole on the steel beam is increased, making it easier for the bolt to pass through the first strip hole on the connecting plate and the steel beam, thereby facilitating the bolt-to-steel beam connection operation and improving the installation efficiency of the sound barrier. At the same time, the high bolt alignment efficiency reduces the time workers spend working at heights and improves the safety of workers.

[0035] 2. The lateral barriers and top barriers are assembled and spliced on the ground, which reduces the time workers spend working at heights and thus improves their safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall structure of a fully enclosed sound barrier ceiling for rail transit according to an embodiment of the present application;

[0037] Figure 2 This is a schematic structural diagram of a longitudinal support in a fully enclosed sound barrier ceiling for rail transit according to an embodiment of the present application;

[0038] Figure 3 This is a structural diagram of steel beams and connecting plates in a fully enclosed sound barrier ceiling for rail transit according to an embodiment of the present application;

[0039] Figure 4 yes Figure 2 A magnified schematic diagram of part A;

[0040] Figure 5 yes Figure 2 An enlarged schematic diagram of part B;

[0041] Figure 6 This is a cross-sectional view of a connecting plate in a fully enclosed rail transit sound barrier ceiling according to an embodiment of the present application;

[0042] Figure 7 yes Figure 6 Enlarged schematic diagram of part C.

[0043] Explanation of reference numerals: 1, lateral barrier; 2, top barrier;

[0044] 3. Steel beam; 31. Middle plate; 32. Side plate;

[0045] 4. Longitudinal support; 5. Sound-absorbing panel; 6. Connecting plate; 7. Bolt; 8. First strip hole; 9. Reinforcement rod; 10. Second strip hole; 11. Slide groove; 12. Slider; 13. Screw; 14. Spring; 15. Third strip hole. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-6 This application is described in further detail.

[0047] The present application discloses a fully enclosed sound barrier ceiling for rail transit, referring to Figure 1 and Figure 2The fully enclosed sound barrier ceiling for rail transit includes a lateral barrier 1 and a top barrier 2. Both the lateral barrier 1 and the top barrier 2 include a plurality of mutually parallel steel beams 3. The steel beams 3 are in an I-shape. The plurality of mutually parallel steel beams 3 are arranged at intervals. A plurality of longitudinal supports 4 are provided between adjacent steel beams 3. The length direction of the longitudinal supports 4 is perpendicular to the length direction of the steel beams 3.

[0048] Reference Figure 1 and Figure 2 , the longitudinal support 4 in the lateral barrier 1 is located in the groove of the steel beam 3, and both ends abut against the grooves of the steel beam 3;

[0049] Reference Figure 1 and Figure 2 , the longitudinal support 4 in the top barrier 2 includes a channel steel in the groove of the steel beam 3 and a longitudinal keel overlapped on the upper surface of the steel beam 3, the two ends of the channel steel respectively abutting the groove of the steel beam 3, and the length directions of the channel steel and the longitudinal keel are parallel to each other;

[0050] Reference Figure 1 and Figure 2 A sound-absorbing panel 5 is provided on the longitudinal support 4. The sound-absorbing panel 5 in the lateral barrier 1 is a metal sound-absorbing panel 5 and a framed acrylic panel (transparent panel), and the sound-absorbing panel 5 in the top barrier 2 is a frameless acrylic panel (transparent panel).

[0051] Reference Figure 3 and Figure 4 The ends of the steel beams 3 of the lateral barrier 1 and the top barrier 2 abut against each other. The sound barrier also includes a plurality of connecting plates 6. The connecting plates 6 are rectangular plates. The connecting plates 6 are located at the joints of the steel beams 3 and cover the joints of the steel beams 3. The connecting plates 6 and the steel beams 3 are both provided with a plurality of first strip holes 8 for the bolts 7 to pass through. The first strip holes 8 are cross-shaped, and the two holes of the first strip holes 8 are parallel to the length direction of the steel beam 3 and perpendicular to the length direction of the steel beam 3, respectively.

[0052] After the lateral barrier 1 and the top barrier 2 are assembled on the ground, first install the lateral barrier 1 on both sides of the track, then hoist the top barrier 2 between the lateral barriers 1, and make the steel beams 3 of the top barrier 2 and the lateral barrier 1 abut against each other, then fit the connecting plate 6 at the joint of the steel beam 3, then insert the bolt 7 into the first strip hole 8, and use the nut to clamp the connecting plate 6 on the steel beam 3 to complete the connection operation of the steel beam 3.

[0053] In the embodiment of the present application, a magnet is embedded on the plate surface of the connecting plate 6 close to the abutting steel beam 3, so that the connecting plate 6 is initially fixed to the steel beam 3, thereby facilitating the reinforcement operation of the bolts 7.

[0054] Reference Figure 3 and Figure 4In the embodiment of the present application, the steel beam 3 includes a middle plate 31 and side plates 32 arranged on both sides of the middle plate 31. The middle plate 31 is perpendicular to the side plates 32. The connecting plates 6 are respectively located on both sides of the middle plate 31 and the side plates 32 for clamping the middle plate 31 and the side plates 32. There are eight connecting plates 6 at the joints of the steel beam 3.

[0055] Reference Figure 3 and Figure 4 The connecting plates 6 are respectively located on the plate surfaces of the two side plates 32 facing away from each other, the two plate surfaces of the middle plate 31 facing away from each other, and the plate surfaces of the two side plates 32 close to each other; 8 first strip holes 8 are opened on the connecting plates 6 located on the side plates 32 facing away from each other, 8 first strip holes are opened on the connecting plates 6 located on the middle plate 31 facing away from each other, and 4 first strip holes 8 are opened on the remaining connecting plates 6.

[0056] Under the action of multiple first strip holes 8, there are 20 bolts 7 connected at the joints of the steel beam 3, ensuring the splicing stability of the steel beam 3; at the same time, due to the multiple bolts 7, the holes of individual bolts 7 are easily misaligned. Under the action of the first strip holes 8, the position of the bolts 7 is adjusted so that the bolts 7 pass through the connecting plate 6 and the steel beam 3, thereby facilitating the connection operation of the bolts 7 on the steel beam 3.

[0057] Reference Figure 3 and Figure 4 In order to improve the stability of the connecting plate 6 and the stability of the sound barrier, a reinforcing rod 9 is provided on the surface of the connecting plate 6 facing away from the steel beam 3. The reinforcing rod 9 is fixed on the connecting plate 6. The reinforcing rod 9 is perpendicular to the plane where the joint of the steel beam 3 is located. The reinforcing rod 9 and the first strip hole 8 are staggered. The reinforcing rod 9 enhances the bending and shear resistance of the connecting plate 6, thereby enhancing the connection effect of the connecting plate 6 to the steel beam 3.

[0058] Reference Figure 2 and Figure 5 To facilitate the installation of the frameless acrylic panel on the longitudinal keel, a second strip hole 10 for connecting the bolt 7 on the sound-absorbing panel 5 is opened on the steel beam 3 facing the barrier 2. The length direction of the second strip hole 10 is parallel to the length direction of the steel beam 3; the frameless acrylic panel and the longitudinal keel are connected with bolts 7, and the bolts 7 pass through the second strip hole 10, and nuts are used to fix the frameless acrylic panel and the longitudinal keel to the steel beam 3. The operation is simple and convenient; at the same time, the installation efficiency of the frameless acrylic panel and the longitudinal keel is improved.

[0059] Reference Figure 6 and Figure 7In order to reduce the possibility of relative sliding between the connecting plate 6 and the bolt 7, a plurality of slide grooves 11 are provided in the connecting plate 6. The slide grooves 11 are connected to the two holes of the first strip hole 8. There are four slide grooves 11 corresponding to one first strip hole 8. The length directions of adjacent slide grooves 11 are perpendicular to each other. A slider 12 is slidably provided in the slide groove 11. The slider 12 slides against the side wall of the bolt 7. A fixing piece for fixing the slider 12 against the side wall of the bolt 7 is provided on the connecting plate 6.

[0060] Reference Figure 6 and Figure 7 The fixing member includes a plurality of screws 13 threadedly connected to the connecting plate 6. The threaded holes on the connecting plate 6 for the screws 13 to be threadedly connected are connected to the slide groove 11. The ends of the screws 13 located in the slide groove 11 abut against the upper surface of the slider 12.

[0061] After the connecting plate 6 is connected to the steel beam 3 through the bolt 7, slide the slider 12 until it abuts against the screw rod of the bolt 7, and then tighten the screw 13 so that the screw 13 abuts against the upper surface of the slider 12, thereby reducing the possibility of relative sliding between the bolt 7 and the connecting plate 6 and improving the stability of the sound barrier.

[0062] Reference Figure 6 and Figure 7 In order to facilitate the sliding of the slider 12 against the bolt 7, a spring 14 is provided in the connecting plate 6 and located in the slide groove 11. The spring 14 is located between the slider 12 and the bottom wall of the slide groove 11. The length direction of the spring 14 is parallel to the length direction of the slide groove 11. Under the action of the elastic force of the spring 14, the slider 12 is driven to slide and abut against the bolt 7, which facilitates the subsequent fixing of the slider 12 and improves the fixing effect of the slider 12 on the connecting plate 6.

[0063] Reference Figure 6 and Figure 7 In order to facilitate the bolt 7 to enter the first strip hole 8, the end face of the slider 12 away from the bottom wall of the slide groove 11 is inclined in the direction away from the bottom wall of the slide groove 11, and is inclined toward the surface of the bolt 7 entering the first strip hole 8; under the action of the spring 14, the initial position of the slider 12 for abutting the end of the bolt 7 is located at the center of the first strip hole 8, the end of the bolt 7 is abutted against the inclined surface of the slider 12, and the bolt 7 is pressed down, and the bolt 7 drives the slider 12 to slide toward the slide groove 11, thereby facilitating the bolt 7 to enter the first strip hole 8.

[0064] Reference Figure 6 and Figure 7 In order to reduce the obstruction of the slider 12 to the line of sight, thereby facilitating the alignment of the first strip hole 8 on the connecting plate 6 and the first strip hole 8 on the steel beam 3, a third strip hole 15 is opened on the slider 12. The length direction of the third strip hole 15 is parallel to the length direction of the slider 12, and the third strip hole 15 passes through the slider 12.

[0065] The implementation principle of a fully enclosed sound barrier ceiling for rail transit in the embodiment of the present application is as follows:

[0066] When installing the sound barrier, first assemble the lateral barrier 1 and the top barrier 2 on the ground, then install the lateral barrier 1 on both sides of the track, and then hoist the top barrier 2 between the lateral barriers 1, and make the steel beams 3 of the top barrier 2 and the lateral barrier 1 abut against each other, then fit the connecting plate 6 at the joint of the steel beam 3, and then insert the bolt 7 into the first strip hole 8, and use the nut to clamp the connecting plate 6 on the steel beam 3 to complete the connection operation of the steel beam 3; then use the screw 13 to fix the position of the slider 12, which improves the stability of the sound barrier board in the later stage.

[0067] The present application discloses a construction process for a fully enclosed sound barrier ceiling for rail transit. Figure 1 , the construction process of rail transit fully enclosed sound barrier ceiling uses rail transit fully enclosed sound barrier ceiling, also includes;

[0068] S1: Splicing and installing the lateral barrier 1: First, assemble two spans of three steel beams 3 on the ground frame. Then, install the longitudinal support structure 4 between adjacent steel beams 3. Finally, install the sound-absorbing panels 5 on the longitudinal supports 4 to complete the splicing of the lateral barrier 1.

[0069] S2: Splice and install the top barrier 2. Assemble two spans of three steel beams 3 on the ground frame. Then install the longitudinal support 4 keels between adjacent steel beams 3. Finally, install the sound absorbing panels 5 on the longitudinal support 4 keels.

[0070] S3: Hoisting and installing the lateral barrier 1: hoist the lateral barrier 1 to both sides of the track and fix the lateral barrier 1 to the embedded parts on both sides of the track using column foot bolts 7;

[0071] S4: Splice and install the top barrier 2. Hoist the top barrier 2 between the two side barriers 1. Then lower the top barrier 2 so that the steel beams 3 of the top barrier 2 and the side barriers 1 face each other and are locked together.

[0072] S5: Install the connecting plate 6 at the joint of the steel beam 3 of the top barrier 2 and the lateral barrier 1, adjust the position of the connecting plate 6 so that the first strip hole 8 on the connecting plate 6 is aligned with the first strip hole 8 on the steel beam 3, then insert the bolt 7 into the first strip hole 8, lock the connecting plate 6 on the steel beam 3, and complete the splicing and installation of the steel beam 3.

[0073] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A fully enclosed sound barrier ceiling for rail transit, characterized by: The invention comprises a lateral barrier (1) and a top barrier (2), wherein the lateral barrier (1) and the top barrier (2) both comprise a plurality of mutually parallel steel beams (3), wherein the steel beams (3) are in an I-shape, the plurality of mutually parallel steel beams (3) are arranged at intervals, and a plurality of longitudinal supports (4) are arranged between adjacent steel beams (3), wherein the length direction of the longitudinal supports (4) is perpendicular to the length direction of the steel beams (3), and a sound absorbing plate (5) is arranged on the longitudinal supports (4). The ends of the steel beams (3) facing the top of the barrier (2) are in contact with each other. The sound barrier further comprises a plurality of connecting plates (6). The connecting plates (6) are located at and cover the joints of the steel beams (3). The connecting plates (6) and the steel beams (3) are both provided with a plurality of first strip holes (8) for the bolts (7) to pass through. The first strip holes (8) are cross-shaped. Two holes of the first strip holes (8) are parallel to and perpendicular to the length direction of the steel beam (3). A plurality of slide grooves (11) are provided in the connecting plate (6), the slide grooves (11) are connected to the two holes of the first strip hole (8), a slider (12) is slidably provided in the slide groove (11), the slider (12) is slidably abutted against the side wall of the bolt (7), and a fixing member for fixing the slider (12) against the side wall of the bolt (7) is provided on the connecting plate (6); The connecting plate (6) is provided with a spring (14) in the chute (11), and the spring (14) is located between the slider (12) and the bottom wall of the chute (11); The end surface of the slider (12) away from the bottom wall of the slide groove (11) is inclined in a direction away from the bottom wall of the slide groove (11) and is inclined toward the surface where the bolt (7) enters the first strip hole (8).

2. A fully enclosed rail transit sound barrier ceiling according to claim 1, characterized in that: The steel beam (3) includes a middle plate (31) and side plates (32) arranged on both sides of the middle plate (31), wherein the middle plate (31) is perpendicular to the side plates (32), and the connecting plates (6) are respectively located on both sides of the middle plate (31) and the side plates (32) for clamping the middle plate (31) and the side plates (32).

3. The fully enclosed rail transit sound barrier ceiling according to claim 1, characterized in that: A second strip hole (10) for connecting the bolt (7) on the sound absorbing plate (5) is provided on the steel beam (3) facing the top barrier (2), and the length direction of the second strip hole (10) is parallel to the length direction of the steel beam (3).

4. The fully enclosed rail transit sound barrier ceiling according to claim 1, characterized in that: The fixing member comprises a plurality of screws (13) threadedly connected to the connecting plate (6); threaded holes on the connecting plate (6) for the screws (13) to be threadedly connected are connected to the slide groove (11); and the ends of the screws (13) located in the slide groove (11) abut against the upper surface of the slider (12).

5. The fully enclosed rail transit sound barrier ceiling according to claim 1, characterized in that: The slider (12) is provided with a third strip hole (15), the length direction of the third strip hole (15) is parallel to the length direction of the slider (12), and the third strip hole (15) passes through the slider (12).

6. The fully enclosed rail transit sound barrier ceiling according to claim 1, characterized in that: A reinforcing rod (9) is provided on the surface of the connecting plate (6) facing away from the steel beam (3), the reinforcing rod (9) is perpendicular to the plane where the joint seam of the steel beam (3) is located, and the reinforcing rod (9) and the first strip hole (8) are arranged in an alternating manner.

7. A construction process for a fully enclosed sound barrier ceiling for rail transit, characterized by: The fully enclosed rail transit sound barrier ceiling according to any one of claims 1 to 6 further comprises: S1: Splicing and installing the lateral barrier (1): first assemble two spans of three steel beams (3) on the ground frame, then install the longitudinal support (4) structure between adjacent steel beams (3), and then install the sound absorbing board (5) on the longitudinal support (4) to complete the splicing of the lateral barrier (1); S2: Splice and install the top barrier (2), assemble two spans and three frames of steel beams (3) on the ground frame, then install the longitudinal support (4) keels between adjacent steel beams (3), and then install the sound absorbing panels (5) on the longitudinal support (4) keels; S3: hoisting and installing the lateral barrier (1), hoisting the lateral barrier (1) to both sides of the track, and fixing the lateral barrier (1) to the embedded parts on both sides of the track by column foot bolts; S4: Splicing and installing the top barrier (2), hoisting the top barrier (2) between the side barriers (1) on both sides, and then lowering the top barrier (2) so that the steel beams (3) of the top barrier (2) and the side barriers (1) face each other and are locked together; S5: Install the connecting plate (6) at the joint of the steel beam (3) of the top barrier (2) and the lateral barrier (1), adjust the position of the connecting plate (6) so that the first strip hole (8) on the connecting plate (6) and the first strip hole (8) on the steel beam (3) are aligned, then insert the bolt (7) into the first strip hole (8), lock the connecting plate (6) on the steel beam (3), and complete the splicing and installation of the steel beam (3).

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