Assembled tenon-connected rail top air duct structure

Abstract

To provide a structure of a prefabricated tenon-connected rail top airway. [Solution] The system comprises a first precast hanging wall 111 assembly, a second precast hanging wall 112 assembly, a precast panel assembly, and a horizontal support structure, the first precast hanging wall assembly and the second precast hanging wall assembly being arranged symmetrically, the top of the first precast hanging wall assembly and the top of the second precast hanging wall assembly are both connected to the station body floor slab, the bottom of the first precast hanging wall assembly and the bottom of the second precast hanging wall assembly are both provided with stopper structures that can engage with the precast panel assemblies, and both the left and right sides of the precast panel assemblies are removably connected to one stop structure, and the precast panel assemblies, first precast hanging wall assembly, and second precast hanging wall assembly combine to form an air passage structure 1.

Description

[Technical Field]

[0001] This invention belongs to the technical field of rail transit engineering, and particularly relates to a prefabricated tenon-connected rail top airway structure. [Background technology]

[0002] The rail top ventilator is an important functional structure located above the track area in underground rail transit construction and suspended below the floor slab near the side wall of the station. Its primary function is to exhaust air and smoke from the train's overhead, and it also serves as the suspension point for the contact screen and the support point for the platform screen doors. In traditional construction, the rail top ventilator is typically constructed using cast-in-place reinforced concrete, and its construction work is carried out after the station structure is completed. This traditional process poses deficiencies in resource utilization efficiency and pollution reduction. Complex concrete pouring work is carried out within a limited underground space, typically resulting in labor-intensive work and poor working conditions (dust, noise, and confined spaces). This not only slows construction progress, but also makes it difficult to effectively ensure construction safety and structural quality. In related technologies, construction is carried out after the main structure is completed, so the construction window period seriously interferes with subsequent important processes such as the start of the shield, subsequent rail laying, electrical machinery installation and interior decoration, and multiple construction teams and processes work in parallel and cross-sectionally within the same narrow space, affecting production efficiency, quality and safety levels and construction progress. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of this, the present invention aims to solve at least to some extent one of the related technical problems. [Means for solving the problem]

[0004] To achieve the above objectives, the technical solution of the present invention is realized as follows:

[0005] A prefabricated tenon-connected rail top airway structure, a first precast hanging wall assembly, a second precast hanging wall assembly, a precast panel assembly, and a horizontal support structure; the first precast suspended wall assembly and the second precast suspended wall assembly are arranged symmetrically, the top of the first precast suspended wall assembly and the top of the second precast suspended wall assembly are both connected to the station body floor slab, the bottom of the first precast suspended wall assembly and the bottom of the second precast suspended wall assembly are both provided with stopper structures that can engage with precast panel assemblies, and both the left and right sides of the precast panel assemblies are both detachably connected to one stopper structure, and the precast panel assemblies, the first precast suspended wall assembly and the second precast suspended wall assembly combine to form an air passage structure, the horizontal support structure is provided inside the second precast hanging wall assembly, one end of the horizontal support structure is connected to the station body side wall, and the other end of the horizontal support structure is connected to the second precast hanging wall assembly; A platform door is provided at the bottom of the first precast hanging wall assembly.

[0006] Furthermore, the precast panel assembly includes a plurality of precast standard plates, a plurality of precast perforated plates, and a plurality of precast hanging contact mesh plates, and the plurality of precast standard plates, the plurality of precast perforated plates, and the plurality of precast hanging contact mesh plates are all arranged inside a stopper structure, and the sides of the precast standard plates, the sides of the precast perforated plates, and the sides of the precast hanging contact mesh plates are all connected to the stopper structure via a connecting structure.

[0007] Furthermore, the first precast hanging wall assembly includes a plurality of first precast hanging walls, the plurality of first precast hanging walls are arranged in an array, two adjacent first precast hanging walls are connected via a joint structure, the tops of the first precast hanging walls are connected to the station body floor slab, a stop structure is provided inside the first precast hanging walls, and a support wall for attaching platform doors is provided at the bottom of the first precast hanging walls.

[0008] Furthermore, the second precast hanging wall assembly includes a plurality of second precast hanging walls, the plurality of second precast hanging walls are arranged in an array, two adjacent second precast hanging walls are connected via a joint structure, the tops of the second precast hanging walls are connected to the station body floor slab, and a stop structure is provided inside the second precast hanging walls.

[0009] Furthermore, the stopper structure is a stopper baffle, and the stopper baffle is provided at the inner bottom of the precast hanging wall, and the side of the precast panel assembly is connected to the stopper baffle via a connecting structure.

[0010] Furthermore, the joint structure includes two tenon connection holes, and the two tenon connection holes are symmetrically located on both sides of the precast hanging wall.

[0011] Further, the horizontal support structure includes a plurality of crossbars, the plurality of crossbars being arranged in an array between the second precast hanging wall assembly and the station body side wall, one end of the crossbars being connected to the station body side wall, and the other end of the crossbars being connected to the second precast hanging wall assembly.

[0012] Furthermore, a filling structure is provided between two adjacent panels of the precast panel assembly, and the filling structure is a grout material.

[0013] Furthermore, the connection structure includes a connection bolt and a connection nut, and the stopper baffle is connected and fixed to the side of the precast panel assembly via the connection bolt and the connection nut.

[0014] Furthermore, the top of the precast hanging wall is connected to the station main floor slab via a lifting structure, which includes a lifting bar, a fixing nut, and a U-shaped steel backing plate, and the bottom of the lifting bar is connected to the precast hanging wall, and the top of the lifting bar penetrates the station main floor slab, and the top of the lifting bar is connected and fixed to the station main floor slab via the fixing nut and the U-shaped steel backing plate. [Effects of the Invention]

[0015] Compared with the prior art, the structure of the assembled tenon-connected rail top airway described in the present invention has the following advantages: (1) The horizontal support structure is made up of multiple crossbars, which form a rigid connection between the second precast hanging wall assembly and the side wall of the station main body. This effectively transfers the horizontal load generated on the platform screen door to the main body structure, preventing the air passage structure from being subjected to force and causing lateral displacement or deformation, and ensuring the long-term stability of the platform screen door system. (2) One end of the crossbar is welded to the embedded steel plate of the second precast hanging wall, and the other end is secured to the side wall of the station body with a flange to distribute stress evenly. This structure can convert concentrated loads into surface loads, significantly reducing the risk of stress concentration at the connection nodes and improving the fatigue resistance and service life of the entire structure. (3) Tenon joints are provided on the vertical end faces of adjacent precast hanging walls, and joint-connecting steel plates are pre-embedded on the vertical end faces of the precast plates. The concave-convex interlocking mechanism of the tenon joints automatically guides and accurately aligns the components when lifting, achieving a seamless connection in combination with welding of the steel plates. This significantly reduces the difficulty of manual adjustment, avoids the cumulative error problem of traditional cast-in-place construction, and improves the efficiency of joining units. (4) The assembled rail-top airway structure utilizes a multi-rigid connection structure to achieve overall rigidity and strengthen sealing. The vertical connection involves a suspension bar passing through grout holes in the station's main floor slab and locking to a U-shaped support plate via a self-locking nut. The horizontal connection involves a crossbar that transfers the load of the platform screen door to the station side wall. The vertical connection is completed by fully welding the joint steel plates between the units. The three-dimensional connection network significantly improves the structure's ability to withstand earthquakes and deformation. [Brief explanation of the drawings]

[0016] The drawings that constitute a part of the present invention are intended to provide a further understanding of the present invention, and the exemplary embodiments of the present invention and the description thereof are intended to explain the present invention and are not intended to unduly limit the present invention. [Figure 1] 1 is a schematic diagram of the structure of the assembled tenon-connected rail top airway described in the embodiment of the present invention; [Figure 2] 1 is a standard cross-sectional view of the assembled rail top airway according to an embodiment of the present invention; [Figure 3] FIG. 2 is an elevational layout diagram of the first precast hanging wall according to the embodiment of the present invention. [Figure 4] FIG. 2 is an elevation layout diagram of the second precast hanging wall according to the embodiment of the present invention. [Figure 5] 1 is a schematic diagram of the connection between a precast hanging wall and a precast panel assembly according to an embodiment of the present invention; FIG. [Figure 6] 1 is a schematic diagram of the joint structure between precast hanging walls according to an embodiment of the present invention; [Figure 7] FIG. 2 is a schematic diagram of a filling structure between panels of a precast panel assembly according to an embodiment of the present invention. [Figure 8] 1 is a schematic diagram of the connection between the precast hanging wall and the floor slab of the station body according to the embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0017] Furthermore, the embodiments and features of the embodiments of the present invention can be combined with each other as long as there is no contradiction.

[0018] In describing the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., are based on the orientation or positional relationships shown in the drawings and are intended merely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or elements shown have a particular orientation or must be constructed or operated in a particular orientation, and therefore should not be understood as limiting the present invention. Furthermore, the terms "first," "second," etc., are intended merely for descriptive purposes and do not indicate or imply the relative importance or number of technical features shown. Thus, a feature qualified as "first," "second," etc., may explicitly or implicitly include one or more of the feature. In describing the present invention, unless otherwise specified, "plurality" means two or more than two.

[0019] In describing the present invention, it should be noted that unless otherwise clearly specified or limited, the terms "attached," "coupled," and "connected" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediary, or communication within two elements. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0021] As shown in FIG. 1 , the prefabricated tenon-connected rail-top airway structure includes a first precast suspended wall assembly, a second precast suspended wall assembly, a precast panel assembly 12, and a horizontal support structure, the first precast suspended wall assembly and the second precast suspended wall assembly are arranged symmetrically, the tops of the first precast suspended wall assembly and the tops of the second precast suspended wall assembly are both connected to the station body floor slab 21, the bottoms of the first precast suspended wall assembly and the bottoms of the second precast suspended wall assembly are both provided with stopper structures that can engage with the precast panel assemblies 12, and the left and right sides of the precast panel assembly 12 are both detachably connected to one stopper structure, and the precast panel assembly 12, the first precast suspended wall assembly, and the second precast suspended wall assembly are combined to form the airway structure 1. The horizontal support structure is provided inside the second precast hanging wall assembly, one end of the horizontal support structure is connected to the station body side wall 22, the other end of the horizontal support structure is connected to the second precast hanging wall assembly, and a platform door 23 is provided at the bottom of the first precast hanging wall assembly.

[0022] The precast panel assembly 12 includes a plurality of precast standard plates 121, a plurality of precast perforated plates 122, and a plurality of precast hanging contact mesh plates 123, and the plurality of precast standard plates 121, the plurality of precast perforated plates 122, and the plurality of precast hanging contact mesh plates 123 are all arranged inside a stopper structure, and the sides of the precast standard plates 121, the sides of the precast perforated plates 122, and the sides of the precast hanging contact mesh plates 123 are all connected to the stopper structure via a connecting structure.

[0023] The first precast hanging wall assembly includes a plurality of first precast hanging walls 111, which are arranged in an array, with two adjacent first precast hanging walls 111 connected via a joint structure, the tops of the first precast hanging walls 111 connected to the station body floor slab 21, a stop structure provided inside the first precast hanging walls 111, and a support wall 113 for attaching platform screen doors 23 provided at the bottom of the first precast hanging walls 111.

[0024] The second precast hanging wall assembly includes a plurality of second precast hanging walls 112, which are arranged in an array, and two adjacent second precast hanging walls 112 are connected via a joint structure, the tops of the second precast hanging walls 112 are connected to the station body floor slab 21, and a stop structure is provided inside the second precast hanging walls 112.

[0025] In this embodiment, the stopper structure is a stopper baffle, which is provided on the inner bottom of the precast hanging wall. The side of the precast panel assembly 12 is connected to the stopper baffle via a connecting structure. The connecting structure includes a connecting bolt 132 and a connecting nut 133, and the stopper baffle is connected and fixed to the side of the precast panel assembly 12 via the connecting bolt 132 and the connecting nut 133. The joint structure includes two tenon connection ports 114, which are symmetrically located on both sides of the precast hanging wall. Tenon connection ports 114 are provided on the vertical end surfaces of adjacent precast hanging walls, and joint connection steel plates 14 are pre-embedded in the vertical end surfaces of the precast plates. The concave-convex interlocking mechanism of the tenon connection ports 114 automatically guides and accurately aligns the members during lifting, achieving a seamless connection when combined with steel plate welding. This significantly reduces the difficulty of manual adjustment, avoids the problem of cumulative errors that occurs with conventional cast-in-place construction, and improves the efficiency of joining units.

[0026] The horizontal support structure includes a plurality of crossbars 16 arranged between the second precast hanging wall assembly and the station body side wall 22. One end of each crossbar 16 is connected to the station body side wall 22, and the other end is connected to the second precast hanging wall assembly. The horizontal support structure is composed of the plurality of crossbars 16, forming a rigid connection between the second precast hanging wall assembly and the station body side wall 22. This effectively transfers horizontal loads generated by the platform screen doors 23 to the main structure, preventing lateral displacement or deformation of the air passage structure 1 due to force, and ensuring the long-term stability of the platform screen door 23 system. One end of each crossbar 16 is welded to a steel plate embedded in the second precast hanging wall 112, and the other end is anchored to the station body side wall 22 by a bolt 163 via a flange to uniformly distribute stress. The structure can convert concentrated loads into area loads, significantly reducing the risk of stress concentration at connection nodes and improving the fatigue resistance and service life of the entire structure.

[0027] A filling structure is provided between two adjacent panels of the precast panel assembly 12, and the filling structure is a grout material 212.

[0028] The top of the precast hanging wall is connected to the station main floor slab 21 via a lifting structure, which includes a lifting bar 15, a fixing nut 151, and a U-shaped steel backing plate 152. The bottom of the lifting bar 15 is connected to the precast hanging wall, and the top of the lifting bar 15 penetrates the station main floor slab 21, and the top of the lifting bar 15 is connected and fixed to the station main floor slab 21 via the fixing nut 151 and the U-shaped steel backing plate 152.

[0029] Operation method of this embodiment The first precast hanging wall 111 is used only within the effective platform range and has a support wall 113 at the bottom, thereby meeting the specialized needs of the platform screen door 23. The second precast hanging wall 112 does not take into account the installation needs of the platform screen door 23. When producing the precast hanging wall, the tenon connection holes 114, the precast hanging wall and plate connection bolt holes 131, the hanging bars 15, and the crossbar embedding steel plates 161 should be secured and embedded in advance.

[0030] According to construction needs, the production of precast panel assemblies 12 includes three types: precast standard panels 121, precast perforated panels 122, and precast suspended contact mesh panels 123. The precast perforated panels 122 have pre-embedded steel panels 1221 around their peripheries, thereby meeting specialized ventilation needs. The precast suspended contact mesh panels 123 have pre-embedded suspension point bolts 1231 in the precast panel rib beams 124, thereby meeting specialized contact mesh needs. The precast standard panels 121 are used as standard position air channel panels, eliminating the need for pre-securing holes and pre-embedding bolts. When producing each type of precast panel, pre-securing and pre-embedding bolt holes 131 for connecting the panels to the precast hanging wall and the joint connection steel panels 14 in the precast panel rib beams 124 are required.

[0031] The precast hanging wall 11 and the precast plate 12 undergo relevant testing and inspection by the manufacturer to ensure that the products pass the test and meet the implementation needs of the site. After satisfying all the test and inspection criteria, a factory delivery certificate is issued and the components are transported to the site.

[0032] The precast hanging wall 11 and precast plate 12 are assembled to the on-site dedicated assembly bracket, and the connecting bolts 132 are inserted into the bolt holes 131, and the connecting nuts 133 are tightened and fixed to form the rail top air duct unit.

[0033] To meet the connection needs between the rail top air passage unit and the station main floor slab 21, grout holes 211 should be reserved in advance according to the spacing of the suspension bars 15 during the construction of the station main floor slab 21, to meet the need for the subsequent connection and fixing between the suspension bars 15 and the station main floor slab 21. The protective walls of the grout holes 211 can be made of materials such as corrugated pipes, and should be installed and fixed in a way that avoids the steel bars 214 of the station main floor slab 21.

[0034] The assembled rail-top airway unit is lifted vertically above or lifted from below onto the station's main floor slab 21 using a specially made lifting device, and after the lifting bar 15 has passed through the grout hole 211 and placed in place, it is tightened using fixing nuts 151 and U-shaped steel backing plates 152, meeting the requirements for the rail-top airway unit to be connected and fixed vertically to the station's main floor slab 21; the fixing nuts 151 should have a self-locking function. To meet the installation error requirements for the rail-top airway unit, a construction gap is secured in advance between the rail-top airway unit and the main structure floor slab 21, which is later filled with grout 212.

[0035] After the rail-top airway units are installed, joint steel plates 14 are welded between the precast plates 12 to meet the longitudinal connection needs of the rail-top airway units. At the same time, a crossbar 16 is installed within the effective platform area, with one end welded to a crossbar-embedded steel plate 161 in the second precast hanging wall 112 and the other end equipped with a crossbar flange 162, which is connected to the station body side wall 22 via bolts 163. To meet the implementation tolerance needs of the crossbar 16, a predetermined installation gap is reserved between the crossbar flange 162 and the station body side wall 22, which is then filled with grout 212 after the crossbar is installed.

[0036] After the rail top airway units are installed, they are grouted to meet the joint requirements. Grouting is performed from top to bottom through the U-shaped openings in the U-shaped steel backing plate 152 at the top of the precast hanging wall. Grout material 212 is then pumped through the grout passages formed by the grout holes 211 in the station floor slab, the mounting gap between the precast hanging wall and the station floor slab 21, and the gaps in the precast hanging wall tenon joints 114. Once the grout has been pumped out from the bottom of the precast hanging wall, the grouting of the gaps in the grout passages is considered complete. Grout material 212 is then used to fill the adjacent gaps in the precast plates 12.

[0037] The rail top airway units are divided into sections inside and outside the effective platform range, where the inside of the effective platform range is formed by the joining of a first precast hanging wall 111, a precast plate 12 and a second precast hanging wall 112, as shown in Figure 1, and a platform screen door support wall 113 is provided on the first precast hanging wall 111, thereby meeting the installation requirements of the platform screen door 23 within the effective platform range. The outside of the effective platform range is formed by the joining of a second precast hanging wall 112, a precast plate 12 and a second precast hanging wall 112.

[0038] The above are only preferred embodiments of the present invention, and do not limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention. [Explanation of symbols]

[0039] 1...Wind duct structure 111···First precast hanging wall 112···Second precast hanging wall 113...Supporting wall 114···Mount connection port 115···Hanging wall rib beam 12. Precast Panel Assembly 121 Precast Standard Plate 122 Precast perforated plate 1221···Steel plate with embedded ventilation holes 123 Precast Hanging Contact Mesh Plate 1231···Hanging point embedded bolt 124 Precast Plate Rib Beam 132 Connection bolt 133···Connecting nut 14. Joint connection steel plate 15 Hanging bar 151···Fixing nut 152···U-shaped steel backing plate 16. Crossbar 161···Crossbar embedded steel plate 162···Crossbar flange 163···Chemical Volts 21. Station main floor slab 211 Grout hole 212 Grout material 213 Grout stop bar 214···Floor slab reinforcing bars 22 Station main body side wall 23 Platform door

Claims

1. A prefabricated tenon-connected rail top airway structure, a first precast hanging wall assembly, a second precast hanging wall assembly, a precast panel assembly (12), and a horizontal support structure; the first precast suspended wall assembly and the second precast suspended wall assembly are provided symmetrically, the tops of the first precast suspended wall assembly and the tops of the second precast suspended wall assembly are both connected to the station body floor slab (21), the bottoms of the first precast suspended wall assembly and the bottoms of the second precast suspended wall assembly are both provided with stopper structures engageable with precast panel assemblies (12), and both the left and right sides of the precast panel assembly (12) are both removably connected to one stop structure, and the precast panel assembly (12), the first precast suspended wall assembly, and the second precast suspended wall assembly combine to form an air passage structure (1); the horizontal support structure is provided inside the second precast hanging wall assembly, one end of the horizontal support structure is connected to the station body side wall (22), and the other end of the horizontal support structure is connected to the second precast hanging wall assembly; A prefabricated tenon-connected rail top vent structure, characterized in that a platform door (23) is provided at the bottom of the first precast hanging wall assembly.

2. 2. The precast panel assembly (12) includes a plurality of precast standard plates (121), a plurality of precast perforated plates (122), and a plurality of precast hanging contact mesh plates (123), wherein the plurality of precast standard plates (121), the plurality of precast perforated plates (122), and the plurality of precast hanging contact mesh plates (123) are all arranged inside a stopper structure, and the sides of the precast standard plates (121), the sides of the precast perforated plates (122), and the sides of the precast hanging contact mesh plates (123) are all connected to the stopper structure via a connecting structure.

3. 2. The prefabricated tenon-connected rail top airway structure according to claim 1, wherein the first precast hanging wall assembly includes a plurality of first precast hanging walls (111), the plurality of first precast hanging walls (111) are arranged in an array, two adjacent first precast hanging walls (111) are connected via a joint structure, the tops of the first precast hanging walls (111) are connected to the station body floor slab (21), a stop structure is provided inside the first precast hanging walls (111), and a support wall (113) for attaching a platform screen door (23) is provided at the bottom of the first precast hanging walls (111).

4. 2. The prefabricated tenon-connected rail top airway structure according to claim 1, wherein the second precast hanging wall assembly includes a plurality of second precast hanging walls (112), the plurality of second precast hanging walls (112) are arranged in an array, two adjacent second precast hanging walls (112) are connected via a joint structure, the tops of the second precast hanging walls (112) are connected to the station body floor slab (21), and a stop structure is provided inside the second precast hanging wall (112).

5. The stopper structure is a stopper baffle, which is provided at the inner bottom of the precast hanging wall, and the side of the precast panel assembly (12) is connected to the stopper baffle through a connecting structure.

6. The assembled tenon-connected rail top airway structure according to claim 5, characterized in that the joint structure includes two tenon-connected holes (114), and the two tenon-connected holes (114) are symmetrically located on both sides of the precast hanging wall.

7. The prefabricated tenon-connected rail top airway structure according to any one of claims 1 to 4, characterized in that the horizontal support structure includes a plurality of crossbars (16), the plurality of crossbars (16) being arranged between the second precast hanging wall assembly and the station body side wall (22), one end of the crossbar (16) being connected to the station body side wall (22) and the other end of the crossbar (16) being connected to the second precast hanging wall assembly.

8. The prefabricated tenon-connected rail-top airway structure according to claim 7, characterized in that a filling structure is provided between two adjacent panels of the precast panel assembly (12), and the filling structure is a grout material (212).

9. The assembled tenon-connected rail top airway structure according to claim 5, characterized in that the connection structure includes a connection bolt (132) and a connection nut (133), and the stopper baffle is connected and fixed to the side of the precast panel assembly (12) via the connection bolt (132) and the connection nut (133).

10. 6. The prefabricated tenon-connected rail top airway structure according to claim 5, wherein the top of the precast hanging wall is connected to the station main floor slab (21) via a lifting structure, the lifting structure including a lifting bar (15), a fixing nut (151), and a U-shaped steel backing plate (152), the bottom of the lifting bar (15) is connected to the precast hanging wall, the top of the lifting bar (15) penetrates the station main floor slab (21), and the top of the lifting bar (15) is connected and fixed to the station main floor slab (21) via the fixing nut (151) and the U-shaped steel backing plate (152).

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