Assembly type rail top air duct segment splicing and connecting structure capable of being rapidly constructed

Abstract

The utility model relates to an assembly type rail top air duct segment assembly connecting structure capable of being quickly constructed, which comprises two prefabricated side walls and a prefabricated bottom plate, prefabricated brackets are correspondingly arranged at the lower parts of the opposite surfaces of the two prefabricated side walls, the prefabricated bottom plate is arranged at the tops of the prefabricated brackets, a rectangular notch is reserved in one side edge of each prefabricated side wall, and the rectangular notches are communicated with the prefabricated brackets. I-shaped steel corresponding to the rectangular notch is pre-buried in the other side edge of the prefabricated side wall, a grout outlet communicated with the top of the rectangular notch is reserved in the outer wall of the prefabricated side wall, a grouting opening communicated with the bottom of the rectangular notch is reserved in the inner wall of the prefabricated side wall, and a plurality of hoisting rod pieces are reserved at the top of the prefabricated side wall. According to the utility model, the problems of complex working procedures, difficulty in inspection of construction quality and high personal safety risk of constructors in the traditional assembly type rail top air duct section assembly construction method are solved, the construction efficiency is further remarkably improved, and the construction period and the labor cost are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail top air duct construction, in particular to an assembled rail top air duct segment assembly connection structure that can be quickly constructed. Background Art

[0002] The rail-top air duct is an important auxiliary structure of the urban subway platform. It is installed at the intersection of the subway platform middle plate and the track side wall. It is the main component for the top heat dissipation and ventilation during the operation of the subway train. In previous projects, the rail-top air duct usually adopts the cast-in-place construction method, but because its construction lags behind the main structure and the working space is limited, there are problems such as complex procedures, long construction period, and high labor costs.

[0003] With the rapid development of urban rail transit, the efficiency and quality requirements for rail transit construction are getting higher and higher. In recent years, prefabricated building technology has developed rapidly, and prefabricated rail-top air ducts have emerged. Prefabricated rail-top air duct segments are usually composed of prefabricated side walls and prefabricated bottom plates. Steel structure connectors are embedded at the edges of prefabricated rail-top air duct segments, and adjacent prefabricated rail-top air duct segments are connected by bolts. Although the prefabricated rail-top air duct has solved the shortcomings of the cast-in-place rail-top air duct to a certain extent, in terms of the current prefabricated rail-top air duct structure construction technology, after the hoisting construction of each segment is completed, the construction personnel need to enter the rail-top air duct warehouse to complete the connection construction between the segments. This not only makes the construction quality of the connection between the segments difficult to inspect, but also significantly increases the personal safety risk of the construction personnel due to the small internal space of the rail-top air duct warehouse. Summary of the invention

[0004] The utility model aims to solve the deficiencies of the prior art and provide an assembled rail-top air duct segment assembly connection structure that can be quickly constructed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an assembled rail-top air duct segment assembly connection structure that can be quickly constructed, including two prefabricated side walls and a prefabricated bottom plate, the lower parts of the opposite surfaces of the two prefabricated side walls are correspondingly provided with prefabricated brackets, the prefabricated bottom plate is installed on the top of the prefabricated brackets, a rectangular notch is reserved on one side of the side wall, and the top of the rectangular notch passes through the prefabricated side wall along the height direction of the prefabricated side wall, and the bottom does not pass through the prefabricated side wall, and an I-beam corresponding to the rectangular notch is pre-embedded on the other side of the prefabricated side wall, and the I-beam is arranged along the height direction of the prefabricated side wall. The top in the degree direction is flush with the top of the prefabricated side wall, and the bottom is higher than the bottom of the rectangular notch. The outer wall of the prefabricated side wall is reserved with a slurry outlet connected with the top of the rectangular notch, and the inner wall of the prefabricated side wall is reserved with a grouting outlet connected with the bottom of the rectangular notch. A number of lifting rods are reserved at the top of the prefabricated side wall, and are fixed to the middle plate through the lifting rods; two prefabricated side walls are connected to a prefabricated bottom plate to form an assembled track top air duct segment. When two adjacent assembled track top air duct segments are spliced, the I-beam at the joint slides into the rectangular notch and is fixed by grouting in the rectangular notch.

[0006] In particular, a plurality of first bolt holes are reserved on the top of the prefabricated corbel, a plurality of second bolt holes corresponding to the first bolt holes are reserved on the prefabricated bottom plate, and the prefabricated bottom plate and the prefabricated corbel are fixed by bolts passing through the second bolt holes and the first bolt holes and tightening nuts.

[0007] In particular, a construction joint is left between the prefabricated base plate and the prefabricated side wall, and the construction joint is filled with cement mortar.

[0008] Particularly, the rectangular notch on the same prefabricated side wall faces rearward of the axial construction direction of the assembled rail-top air duct, and the I-beam faces forward of the construction direction.

[0009] The beneficial effects of the utility model are as follows: the utility model adopts pre-buried I-beams, reserved rectangular notches, and grouting filling to complete the connection between adjacent assembled rail-top air duct segments, wherein the pre-buried I-beams and reserved rectangular notches can be prefabricated in the factory, and only two processes are required on site: hoisting the assembled rail-top air duct segments and pressure grouting. The construction is extremely convenient, the construction quality is easy to ensure, and the labor workload is low. The problems of complex procedures, difficult construction quality inspection, and high personal safety risks for construction personnel in the traditional assembled rail-top air duct segment assembly construction method are solved, and the construction efficiency is further significantly improved, saving construction period and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of an assembled rail top air duct segment of the utility model;

[0011] Figure 2 It is a schematic diagram of the assembly process of two assembled rail top air duct segments of the utility model;

[0012] Figure 3 It is a schematic diagram of two assembled rail top air duct segments of the utility model after assembly;

[0013] Figure 4 It is a cross-sectional view of the assembly of two assembled rail top air duct segments of the utility model;

[0014] In the figure: 1-prefabricated side wall; 11-prefabricated corbel; 111-first bolt hole; 12-rectangular notch; 13-I-beam; 14-grouting port; 15-slurry outlet; 16-lifting rod; 2-prefabricated bottom plate; 21-second bolt hole; 3-construction joint;

[0015] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] like Figure 1-Figure 4 As shown, a prefabricated rail-top air duct segment assembly connection structure that can be quickly constructed includes two prefabricated side walls 1 and a prefabricated bottom plate 2. Prefabricated corbels 11 are correspondingly arranged at the lower parts of the opposite surfaces of the two prefabricated side walls 1. The prefabricated bottom plate 2 is installed on the top of the prefabricated corbels 11. A plurality of first bolt holes 111 are reserved on the top of the prefabricated corbels 11. A plurality of second bolt holes 21 corresponding to the first bolt holes 111 are reserved on the prefabricated bottom plate 2. Bolts pass through the second bolt holes 21 and the first bolt holes 111 between the prefabricated bottom plate 2 and the prefabricated corbels 11 and are fixed by tightening nuts; the prefabricated bottom plate 2 is a factory-prefabricated concrete slab, and a second bolt hole 21 is reserved at the edge near the prefabricated side wall 1 for connection with the prefabricated side wall 1.

[0018] It is predicted that a rectangular notch 12 is reserved on one side of the side wall 1, and the top of the rectangular notch 12 passes through the prefabricated side wall 1 along the height direction of the prefabricated side wall 1, but the bottom does not pass through the prefabricated side wall 1, so as to facilitate assembly and positioning; an I-beam 13 corresponding to the rectangular notch 12 is embedded on the other side of the prefabricated side wall 1, and the top of the I-beam 13 is flush with the top of the prefabricated side wall 1 along the height direction of the prefabricated side wall 1, and the bottom is higher than the bottom of the rectangular notch 12, so as to facilitate grouting at the notch; the I-beam 13 can adopt a smaller cross-sectional size to improve construction convenience and reduce material costs; the rectangular notch 12 on the same prefabricated side wall 1 faces the rear of the axial construction direction of the assembled rail-top air duct, and the I-beam 13 faces the front of the construction direction.

[0019] The outer wall of the prefabricated side wall 1 is reserved with a grouting port 15 connected to the top of the rectangular notch 12, and the inner wall of the prefabricated side wall 1 is reserved with a grouting port 14 connected to the bottom of the rectangular notch 12. The pressure grouting method can be used for grouting with cement mortar.

[0020] A plurality of hoisting rods 16 are reserved at the top of the prefabricated side wall 1 , and the prefabricated side wall 1 is fixed to the middle plate through the hoisting rods 16 ; the hoisting rods 16 can be used to hoist and lift the wall of the prefabricated side wall 1 .

[0021] Two prefabricated side walls 1 are connected to a prefabricated bottom plate 2 to form an assembled rail-top air duct segment. When two adjacent assembled rail-top air duct segments are spliced, the I-beam 13 at the joint slides into the rectangular groove 12 and is fixed by grouting in the rectangular groove 12.

[0022] A construction joint 3 is left between the prefabricated bottom plate 2 and the prefabricated side wall 1, and the construction joint 3 is filled with cement mortar; specifically, in a single assembled rail-top air duct segment, a construction joint 3 is left at the connection between each prefabricated side wall 1 and the prefabricated bottom plate 2 to facilitate grouting filling. This gap can avoid installation inconveniences caused by manufacturing errors of the prefabricated side wall 1 and the prefabricated bottom plate 2.

[0023] After the previous assembled rail-top air duct segment is hoisted into place and fixed, the next adjacent assembled rail-top air duct segment is transported to the projection position of its installation position on the ground plane of the track segment, and then the assembled rail-top air duct segment is vertically lifted to its installation position. During the lifting process, the I-beam 13 embedded in the previous assembled rail-top air duct segment will slide into the rectangular notch 12 reserved in the next adjacent assembled rail-top air duct segment. After grouting the notch, the previous assembled rail-top air duct segment and the next adjacent assembled rail-top air duct segment form a whole; along the axial construction direction of the assembled rail-top air duct, the assembled rail-top air duct segments are assembled sequentially according to the above method.

[0024] Furthermore, the slot grouting process can also be carried out centrally after all assembled rail-top air duct segments are hoisted.

[0025] When the utility model works, it includes the following steps:

[0026] S1, assemble two mirror-symmetrical prefabricated side walls 1 and a prefabricated bottom plate 2 on site into a Figure 1 In the assembled rail-top air duct segment shown, the prefabricated bottom plate 2 and the prefabricated corbel 11 are connected by bolts, and cement mortar is filled at the construction joint 3 to form an adjacent assembled rail-top air duct segment A;

[0027] S2, after the cement mortar at the construction joint 3 reaches the lifting strength requirement, the assembled rail top air duct segment A is hoisted to the subway station platform middle plate for installation and fixation through the hoisting rod 16;

[0028] S3, repeat step S1 to form the next adjacent assembled rail top air duct segment B;

[0029] S4, transporting the assembled rail top air duct segment B to the projection position of its installation position on the ground plane of the rail segment, and then vertically lifting the assembled rail top air duct segment B to its installation position. During the lifting process, the I-beam 13 of the assembled rail top air duct segment A is vertically slid into the rectangular notch 12 of the assembled rail top air duct segment B;

[0030] S5, using the pressure grouting method to pour cement mortar from the grouting hole 14 at the lower inner side of the prefabricated side wall 1 of the assembled track top air duct segment A until grout emerges from the grouting hole 15 at the upper outer side of the prefabricated side wall 1 of the assembled track top air duct segment B;

[0031] S6. Repeat steps S1 to S5 until all the assembled rail-top air duct segments are assembled in sequence along the axial construction direction of the assembled rail-top air duct.

[0032] Among them, S5 can also be carried out uniformly after all the prefabricated rail-top air duct segments are assembled in sequence along the axial construction direction of the prefabricated rail-top air duct, so as to further simplify the construction process and save construction time.

[0033] When assembling the prefabricated rail-top air duct segments, the rear installation segment is lifted vertically, and a tongue-and-groove connection is formed by the I-beam 13 and the rectangular notch 12 in the front and rear installation stages, and the gap is filled by pressure grouting, thereby completely solving the problems of the traditional prefabricated rail-top air duct segment assembly construction method, such as complicated procedures, difficult construction quality inspection, and high personal safety risks for construction workers, and further significantly improving construction efficiency, saving construction time and labor costs.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A fast-construction assembled rail-top air duct segment assembly and connection structure, characterized in that: The invention comprises two prefabricated side walls (1) and a prefabricated bottom plate (2). Prefabricated brackets (11) are provided at the lower parts of the opposite surfaces of the two prefabricated side walls (1). The prefabricated bottom plate (2) is installed on the top of the prefabricated brackets (11). A rectangular notch (12) is reserved on one side of the side wall (1). The top of the rectangular notch (12) passes through the prefabricated side wall (1) along the height direction of the prefabricated side wall (1), but the bottom does not pass through the prefabricated side wall (1). An I-beam (13) corresponding to the rectangular notch (12) is embedded on the other side of the prefabricated side wall (1). The top of the I-beam (13) is flush with the top of the prefabricated side wall (1) along the height direction of the prefabricated side wall (1), but the bottom is higher than the rectangular notch (12). The prefabricated side wall (1) is provided with a grouting port (15) connected to the top of the rectangular notch (12) at the bottom, the outer wall of the prefabricated side wall (1) is provided with a grouting port (14) connected to the bottom of the rectangular notch (12) at the bottom, the inner wall of the prefabricated side wall (1) is provided with a plurality of hoisting rods (16) at the top of the prefabricated side wall (1), and is fixed to the middle plate through the hoisting rods (16); after two prefabricated side walls (1) are connected to a prefabricated bottom plate (2), an assembled rail-top air duct segment is formed; when two adjacent assembled rail-top air duct segments are spliced, the I-beam (13) at the joint is slid into the rectangular notch (12) and is fixed by grouting in the rectangular notch (12).

2. The fast-constructible assembled rail-top air duct segment assembly and connection structure according to claim 1, characterized in that: A plurality of first bolt holes (111) are reserved at the top of the prefabricated corbel (11), a plurality of second bolt holes (21) corresponding to the first bolt holes (111) are reserved on the prefabricated base plate (2), and the prefabricated base plate (2) and the prefabricated corbel (11) are fixed by bolts passing through the second bolt holes (21) and the first bolt holes (111) and tightening nuts.

3. The fast-constructible assembled rail-top air duct segment assembly and connection structure according to claim 1, characterized in that: A construction joint (3) is left between the prefabricated bottom plate (2) and the prefabricated side wall (1), and the construction joint (3) is filled with cement mortar.

4. The fast-constructible assembled rail-top air duct segment assembly and connection structure according to claim 1, characterized in that: The rectangular notch (12) on the same prefabricated side wall (1) faces the rear of the axial construction direction of the assembled rail-top air duct, and the I-beam (13) faces the front of the construction direction.

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