Construction method based on urban rail transit prestressed beam slab

Abstract

The application relates to the technical field of prestressed beam plates, in particular to a construction method based on a prestressed beam plate of urban rail transit, which comprises a first beam plate structure and a second beam plate structure, the first beam plate structure and the second beam plate structure are the same in structure, the lower end of the first beam plate structure is fixedly connected with the second beam plate structure, the first beam plate structure comprises a beam plate prestressed component and a bearing component, the lower end of the beam plate prestressed component is fixedly connected with the bearing component, concrete is used between the beam plate prestressed component and the bearing component, the beam plate prestressed component comprises a first partition plate, prestressed reinforcement, an anchor backing plate, a second partition plate, an adaptive contact seat and a concrete plate, the upper end of the concrete plate is fixedly connected with the adaptive contact seat, and the side end upper portion of the concrete plate is fixedly connected with the first partition plate. The combination of the first beam plate structure and the second beam plate structure improves the bearing capacity.

Description

Technical Field

[0001] This invention relates to the field of prestressed beam and slab technology, specifically to a construction method based on prestressed beam and slab for urban rail transit. Background Technology

[0002] In recent years, with the rapid development of my country's national economy and the advancement of engineering technology, high-speed railways, highways, municipal engineering, bridge engineering, and subway track engineering have developed rapidly. To meet residents' travel needs and alleviate traffic pressure, more and more cities are beginning to build and develop rail transit. In special locations, the joint construction of highway bridges and rail transit, such as cross-river highway bridges, is an effective use of limited space, greatly saving resources and construction time.

[0003] As the closest existing technology, according to Chinese Patent Publication No. CN116677137A, which relates to the field of building engineering technology, a small-scale pseudo-frame structure and construction method for a large-span prestressed concrete beam-slab structure is disclosed. The structure includes: beam-frame columns; and a prestressed slab. In the prestressed slab, the ends of the first longitudinal reinforcement bars at the top of the steel cage extend beyond the ends of the prestressed slab. The second longitudinal reinforcement bars at the top of the steel cage inside the beam-frame columns are located above the beam-frame columns. The first longitudinal reinforcement bars are connected to the corresponding second longitudinal reinforcement bars via stirrups. The first and second longitudinal reinforcement bars within the top opening space formed between the beam-frame columns and the prestressed slab are cast together using concrete. By extending the first longitudinal reinforcement bars from both ends of the steel cage inside the prestressed slab and connecting them to the corresponding extended second longitudinal reinforcement bars on the beam-frame columns, a "small-scale pseudo-frame structure" is formed, simultaneously achieving the overall connection and fixation of the steel cage. Then, concrete is poured into this "small-scale pseudo-frame structure," thus integrating the beam-frame columns and the prestressed slab.

[0004] According to Chinese Patent Publication No. CN116065830A, belonging to the field of prestressed construction technology, this invention specifically discloses a method for prestressing construction in flat slab floor slabs. The method includes a podium building and several towers forming partial enclosures around the podium. The podium building overlaps with each tower, and prestress is formed at the overlap. The construction method includes the following steps: Prestressing zoning: Dividing the podium building and the overlap between the podium and the towers into several zones along the prestressing direction; Forming several prestresses along each zone, with each zone forming transverse and / or vertical prestress between the podium and the towers; Prestressing construction: Performing corresponding prestressing tensioning along each zone, using a single tensioning method to reach the design tension value; In the prestressing construction, the construction sequence of the several zones is to first construct the vertical prestressing, then the transverse prestressing. This invention has the effects of reducing project construction costs, improving construction quality, and accelerating project construction progress.

[0005] However, most of the prestressed beams currently in use are directly supported by the beam body. Since they are beams for rail transit, they need to meet the requirements for seismic performance. When rail vehicles are running, they will generate vibrations, which is a test for the long-term use of prestressed beams and slabs. They need to be strengthened. Therefore, a device is needed to solve the above problems. Summary of the Invention

[0006] To address the problems in the existing technology, this invention provides a construction method based on prestressed beams and slabs for urban rail transit.

[0007] The technical solution adopted by this invention to solve its technical problem is: a construction method based on prestressed beams and slabs for urban rail transit, which includes the following steps: S1. Prestressed installation treatment: Erect the overall structure and install and position the reinforcing bars; S2. Concrete pouring: The concrete is poured to allow it to set within the formwork and then cured. S3. Prestressing treatment: Apply prestress to the steel bars. When the appropriate prestress is reached, cut off the excess steel bars and limit their movement. S4. Grouting treatment: Grouting is performed again on the prestressed steel reinforcement to ensure efficient bonding between the steel reinforcement and the concrete.

[0008] Based on the prestressed beam-slab structure for urban rail transit, including a first beam-slab structure and a second beam-slab structure, the first beam-slab structure and the second beam-slab structure are identical, and the lower end of the first beam-slab structure is fixedly connected to the second beam-slab structure. The first beam-slab structure includes a prestressed beam-slab component and a load-bearing component. The lower end of the prestressed beam-slab component is fixedly connected to the load-bearing component, and the prestressed beam-slab component and the load-bearing component are connected by concrete grouting. The prestressed beam-slab component includes a first diaphragm, prestressed steel bars, anchor plates, a second diaphragm, a matching contact seat, and a concrete slab. The upper end of the concrete slab is fixedly connected to the matching contact seat, and the upper side of the concrete slab is fixedly connected to the first diaphragm. An anchor plate is installed at the center of the first diaphragm, and prestressed steel bars are tensioned and connected to the anchor plate. A second diaphragm is located at the front end of the first diaphragm. Both the first and second diaphragms are fixedly connected to the concrete slab, providing upper prestressed concrete separation. The prestressed beam-slab component provides upper support, and its prestressed design resists swaying stress, making the structure more stable. The matching contact seat and concrete slab within the component provide bottom support, while the upper end has a first and second diaphragm. An anchor plate within the first and second diaphragms limits the prestressed steel bars, and prestress is then applied to the steel bars. Combined with concrete pouring, this improves the overall structural strength.

[0009] Specifically, the load-bearing components include a connecting beam, butt-joint reinforcing bars, a first arc-shaped beam, side beams, a stabilizing support block, internal reinforcing bars, a second arc-shaped beam, a supporting side plate, a butt-joint support block, diagonal reinforcing bars, and a butt-joint stabilizing seat. The lower end of the connecting beam is fixedly connected to the second arc-shaped beam, the side end of the connecting beam is fixedly connected to the first arc-shaped beam, the upper end of the first arc-shaped beam is limited by butt-joint reinforcing bars, the bottom of the second arc-shaped beam is fixedly connected to the supporting side plate, the bottom of the first arc-shaped beam is fixedly connected to the butt-joint stabilizing seat, and the lower end of the butt-joint stabilizing seat is fixedly connected to diagonal reinforcing bars. The lower end of the inclined tie bar is fixedly connected to a butt support block. Through the structural setting of the load-bearing component, the bottom support work can be carried out. The connecting beam and the side beam are fixed by concrete in the later stage. The inclined tie bar is set to provide inclined support and improve the support capacity. The lower end of the side beam is supported by a stable support block and built-in steel bars to improve the load-bearing capacity of the side. The first arc beam and the second arc beam are set in an arc shape, which can uniformly improve the load-bearing capacity. Through the overall structural setting of the beam and slab prestressed component and the load-bearing component, the stability and protection performance are improved.

[0010] Specifically, the load-bearing component also includes an adaptable combined steel block, an inner frame, a combined steel frame, a through steel bar, and a support column frame. The lower end of the connecting support block is fixedly connected to the adaptable combined steel block. The center of the adaptable combined steel block is connected to the through steel bar. The through steel bar is limited between the combined steel frame and the support column frame, and the combined steel frame and the support column frame are fixed together.

[0011] Specifically, the rear end of the combined steel frame is fixedly connected to an inner frame, and the adaptable combined steel block, combined steel frame, through steel bar, and support column frame are integrally limited and fixed.

[0012] Specifically, the inclined reinforcing bars are installed at an angle, and the upper end of the side beam is fixed to the concrete slab.

[0013] Specifically, the upper end of the butt reinforcing bar is fixedly connected to the concrete slab, and the concrete slab, butt reinforcing bar, and side beam are fixed together by concrete curing.

[0014] Specifically, the first and second partitions are filled with concrete and prestressed steel bars are embedded inside them. Grouting holes are provided on the side ends of the prestressed steel bars and the second partition.

[0015] Specifically, the stable support block and the built-in steel bars are filled with concrete, and the space between the second arc-shaped beam and the first arc-shaped beam is also filled with concrete.

[0016] Specifically, the prestressed steel bar is provided with a butt protective sleeve at its center, the upper end of the butt protective sleeve is connected to a through connecting seat, the upper end of the through connecting seat is connected to a grouting port, and a connecting groove is opened at the center of the through connecting seat.

[0017] The beneficial effects of this invention are: I. This invention provides support for the upper part of the beam and slab through the structural design of the prestressed beam and slab components. The prestressed beam and slab components are designed to resist swaying stress, making the structure of the prestressed beam and slab components more stable. The adapter contact seat and concrete slab inside the prestressed beam and slab components provide support at the bottom. Assuming there are a first diaphragm and a second diaphragm at the upper end, the prestressed steel bars are limited by anchor plates in the first diaphragm and the second diaphragm. Then, prestress is provided on the prestressed steel bars, and with the pouring of concrete, the overall structural strength is improved.

[0018] Second, this invention, through the structural design of the load-bearing components, enables bottom support. The connecting beams and side beams are fixed with concrete in the later stage, and the diagonal bracing is used for diagonal bracing to improve the support capacity. The lower end of the side beams is supported by stable support blocks and built-in steel bars to improve the load-bearing capacity of the sides. The first and second arc-shaped beams are designed in an arc shape to uniformly improve the load-bearing capacity. Through the overall structural design of the beam and slab prestressed components and load-bearing components, reinforcement treatment is carried out to improve stability and protection performance. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a plan view of the main construction pile body in this invention; Figure 2 This is a three-dimensional structural diagram of the main body from a frontal perspective in this invention; Figure 3 This is a side-view three-dimensional structural diagram of the main body in this invention; Figure 4 This is a frontal view structural diagram of the first beam-plate structure in this invention; Figure 5 This is a split view of the first beam-plate structure in this invention; Figure 6 This is an exploded view of the prestressed beam and slab component in this invention; Figure 7 This is a frontal perspective three-dimensional structural diagram of the load-bearing component in this invention; Figure 8 This is an exploded view of the load-bearing component in this invention; Figure 9 This is a schematic diagram of the second embodiment of the main body of the present invention.

[0021] In the diagram: 1-First beam-slab structure, 2-Second beam-slab structure, 3-Prestressed beam-slab component, 4-Bearing component, 5-First diaphragm, 6-Prestressed steel reinforcement, 7-Anchor plate, 8-Second diaphragm, 9-Adaptive contact seat, 10-Concrete slab, 11-Connecting beam, 12-Butt reinforcement, 13-First curved beam, 14-Side beam, 15-Stable support block, 16-Internal reinforcement, 17-Second curved beam, 18-Supporting side plate, 19-Butt support block, 20-Diagonal tie steel, 21-Butt stable seat, 22-Adaptive combined steel block, 23-Inner frame, 24-Combined steel frame, 25-Through reinforcement, 26-Supporting column frame, 27-Butt protective sleeve, 28-Connecting groove, 29-Grouting port, 30-Through connecting seat. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] The invention will be further described below with reference to the accompanying drawings. Example 1

[0025] like Figure 1 As shown, the bottom of the first beam-slab structure 1 and the second beam-slab structure 2 are supported by SWM method piles to improve the bearing capacity of the bottom.

[0026] like Figure 2-8 As shown, the construction method of the present invention based on prestressed beams and slabs for urban rail transit includes the following steps: S1. Prestressed installation treatment: Erect the overall structure and install and position the reinforcing bars; S2. Concrete pouring: The concrete is poured to allow it to set within the formwork and then cured. S3. Prestressing treatment: Apply prestress to the steel bars. When the appropriate prestress is reached, cut off the excess steel bars and limit their movement. S4. Grouting treatment: Grouting is performed again on the prestressed steel reinforcement to ensure efficient bonding between the steel reinforcement and the concrete.

[0027] Based on the prestressed beam-slab structure of urban rail transit, it includes a first beam-slab structure 1 and a second beam-slab structure 2. The first beam-slab structure 1 and the second beam-slab structure 2 have the same structure. The lower end of the first beam-slab structure 1 is fixedly connected to the second beam-slab structure 2. The upper part is supported by the prestressed components of the beam-slab structure. The prestressed components of the beam-slab structure are prestressed to resist sway stress, making the structure of the prestressed components of the beam-slab structure more stable. The adapter contact seat and concrete slab inside the prestressed components of the beam-slab structure provide bottom support. The upper end is assumed to have a first diaphragm and a second diaphragm. The prestressed steel bars are limited by anchor plates in the first diaphragm and the second diaphragm. Then, prestress is provided on the prestressed steel bars, and concrete is poured in conjunction to improve the overall structural strength. The first beam-slab structure 1 includes a beam-slab prestressed component 3 and a load-bearing component 4. The lower end of the beam-slab prestressed component 3 is fixedly connected to the load-bearing component 4, and concrete is poured between the beam-slab prestressed component 3 and the load-bearing component 4. like Figure 6 As shown, the prestressed beam component 3 includes a first diaphragm 5, prestressed steel bars 6, anchor plates 7, a second diaphragm 8, a matching contact seat 9, and a concrete slab 10. The upper end of the concrete slab 10 is fixedly connected to the matching contact seat 9, and the upper side end of the concrete slab 10 is fixedly connected to the first diaphragm 5. The anchor plate 7 is installed at the center of the first diaphragm 5, and the prestressed steel bars 6 are tensioned and connected to the anchor plate 7. The front end of the first diaphragm 5 is provided with a second diaphragm 8. Both the first diaphragm 5 and the second diaphragm 8 are fixedly connected to the concrete slab 10 to perform upper prestressed concrete separation treatment.

[0028] like Figure 7As shown, the load-bearing component 4 includes a connecting beam 11, butt-joint reinforcing bars 12, a first arc-shaped beam 13, a side beam 14, a stabilizing support block 15, internal reinforcing bars 16, a second arc-shaped beam 17, a supporting side plate 18, a butt-joint support block 19, diagonal reinforcing bars 20, and a butt-joint stabilizing seat 21. Through the structural arrangement of the load-bearing component 4, bottom support can be provided. The connecting beam 11 and the side beam 14 are fixed together with concrete, and the diagonal reinforcing bars 20 provide diagonal support to improve the support capacity. The lower end of the side beam 14 is supported by the stabilizing support block 15 and the internal reinforcing bars 16, improving the lateral load-bearing capacity. The first arc-shaped beam 13 and the second arc-shaped beam 17 are arc-shaped, which can uniformly improve the load-bearing capacity. Through the overall structural arrangement of the beam-slab prestressed component 3 and the load-bearing component 4, reinforcement treatment is provided to improve stability and protection performance. The lower end of the connecting beam 11... A second arc-shaped beam 17 is fixedly connected to the connecting beam 11. A first arc-shaped beam 13 is fixedly connected to the side end of the connecting beam 11. A butt reinforcing bar 12 is fixedly connected to the upper end of the first arc-shaped beam 13. A supporting side plate 18 is fixedly connected to the bottom of the second arc-shaped beam 17. A butt-joint stabilizing seat 21 is fixedly connected to the bottom of the first arc-shaped beam 13. A diagonal tie bar 20 is fixedly connected to the lower end of the butt-joint stabilizing seat 21. A butt-joint support block 19 is fixedly connected to the lower end of the diagonal tie bar 20. The side beam 14 and the stabilizing support block 15 are fixedly combined first. At the same time, the second arc-shaped beam 17 and the supporting side plate 18 are fixedly combined. The upper end of the butt-joint support block 19 is lifted and fixed to the butt-joint stabilizing seat 21 through the diagonal tie bar 20 to help the connecting beam 11 bear the load. The connecting beam 11 can be butt-jointed with the concrete slab 10 through the butt-joint reinforcing bar 12 and the first arc-shaped beam 13. An adapter contact seat 9 is provided on the concrete slab 10.

[0029] like Figure 8 As shown, the load-bearing component 4 also includes an adapter combined steel block 22, an inner frame 23, a combined steel frame 24, a through steel bar 25, and a support column frame 26. The lower end of the connecting support block 19 is fixedly connected to the adapter combined steel block 22. The center of the adapter combined steel block 22 is connected to the through steel bar 25. The through steel bar 25 is positioned between the combined steel frame 24 and the support column frame 26, and the combined steel frame 24 and the support column frame 26 are fixed together. The load-bearing component 4 is supported at the bottom by the through steel bar 25, the support column frame 26, the combined steel frame 24, and the inner frame 23. The adapter combined steel block 22 is set on the through steel bar 25, and at the same time, the bottom of the built-in steel bar 16 is fixedly combined with the combined steel frame 24 and the support column frame 26 to achieve the installation and fixing function.

[0030] The rear end of the combined steel frame 24 is fixedly connected to the inner frame 23, which is used to limit and fix the combined steel block 22, combined steel frame 24, through steel bar 25, and support column frame 26 as a whole.

[0031] The diagonal bracing 20 is installed at an angle, and the upper end of the side beam 14 is fixed to the concrete slab 10.

[0032] The upper end of the butt reinforcing bar 12 is fixedly connected to the concrete slab 10, and the concrete slab 10, the butt reinforcing bar 12, and the side beam 14 are fixed together by concrete curing.

[0033] The first partition 5 and the second partition 8 are filled with concrete, and the prestressed steel bars 6 are internally wrapped. Grouting holes are provided on the side ends of the prestressed steel bars 6 and the second partition 8.

[0034] The solid support block 15 and the built-in steel bars 16 are filled with concrete, and the space between the second arc beam 17 and the first arc beam 13 is also filled with concrete.

[0035] The working principle of Example 2 is as follows: First, the second beam-slab structure 2 is installed, followed by the installation and fixing of the first beam-slab structure 1. The first beam-slab structure 1 and the second beam-slab structure 2 have the same structure and both serve a supporting function. The first beam-slab structure 1 is composed of a beam-slab prestressed component 3 and a load-bearing component 4. First, the load-bearing component 4 is installed. The load-bearing component 4 is supported at the bottom by a through steel bar 25, a support column frame 26, a combined steel frame 24, and an inner frame 23. The matching combined steel block 22 is set on the through steel bar 25. At the same time, the bottom of the built-in steel bar 16 is fixedly combined with the combined steel frame 24 and the support column frame 26 to achieve the installation and fixing function. Then, concrete can be poured to achieve the supporting function. To construct the upper layer, the side beams 14 and the stabilizing support blocks 15 are fixed together, and the second arc beam 17 and the supporting side plate 18 are fixed together. The upper end of the connecting support block 19 is lifted and fixed to the connecting stabilizing seat 21 by the diagonal tie bar 20, which helps to connect the connecting beam 11 to bear the load. The connecting beam 11 can be connected to the concrete slab 10 by the connecting bar 12 and the first arc beam 13. The concrete slab 10 is equipped with a matching contact seat 9. Then, the first partition 5 and the second partition 8 are installed, and prestressed steel bars 6 and anchor plates 7 are set on the first partition 5 and the second partition 8 to allow for tension adjustment, provide prestress, and help bear the load. Finally, the concrete is poured to complete the work. Example 2

[0036] Based on Example 2, such as Figure 9 As shown, the prestressed steel bar 6 is provided with a butt protective sleeve 27 at its center. The upper end of the butt protective sleeve 27 is connected to a through connecting seat 30. The upper end of the through connecting seat 30 is connected to a grouting port 29. A connecting groove 28 is provided at the center of the through connecting seat 30.

[0037] In this embodiment, a butt-joint protective sleeve 27 is provided on the prestressed steel bar 6. The butt-joint protective sleeve 27 encloses the prestressed steel bar 6, and the side end of the butt-joint protective sleeve 27 is fixed to the first partition 5 and the second partition 8 to achieve the positioning function. Grouting is performed through the grouting port 29, which can penetrate through the connecting seat 30 and the butt-joint protective sleeve 27 to achieve tight extrusion with the prestressed steel bar 6. The setting of the connecting groove 28 does not affect the external discharge of concrete.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction method based on prestressed beams and slabs for urban rail transit, characterized in that, It includes the following steps: S1. Prestressed installation treatment: Erect the overall structure and install and position the reinforcing bars; S2. Concrete pouring: The concrete is poured to allow it to set within the formwork and then cured. S3. Prestressing treatment: Apply prestress to the steel bars. When the appropriate prestress is reached, cut off the excess steel bars and limit their movement. S4. Grouting treatment: Grouting is performed again on the prestressed steel reinforcement to ensure efficient bonding between the steel reinforcement and the concrete. The prestressed beam-slab structure for urban rail transit includes a first beam-slab structure (1) and a second beam-slab structure (2). The first beam-slab structure (1) and the second beam-slab structure (2) have the same structure. The lower end of the first beam-slab structure (1) is fixedly connected to the second beam-slab structure (2). The first beam-slab structure (1) includes a beam-slab prestressed component (3) and a load-bearing component (4). The lower end of the beam-slab prestressed component (3) is fixedly connected to the load-bearing component (4), and concrete is poured between the beam-slab prestressed component (3) and the load-bearing component (4). The prestressed beam component (3) includes a first partition (5), prestressed steel bars (6), an anchor plate (7), a second partition (8), a matching contact seat (9), and a concrete slab (10). The upper end of the concrete slab (10) is fixedly connected to the matching contact seat (9), and the upper side of the concrete slab (10) is fixedly connected to the first partition (5). The center of the first partition (5) is limited by the anchor plate (7), and the anchor plate (7) is tensioned and connected to the prestressed steel bars (6). The front end of the first partition (5) is provided with a second partition (8). The first partition (5) and the second partition (8) are both fixedly connected to the concrete slab (10) for upper prestressed concrete separation treatment. The load-bearing component (4) includes a connecting beam (11), a butt reinforcing bar (12), a first arc beam (13), a side beam (14), a stabilizing support block (15), an internal reinforcing bar (16), a second arc beam (17), a supporting side plate (18), a butt supporting block (19), a diagonal bracing bar (20), and a butt stabilizing seat (21). The lower end of the connecting beam (11) is fixedly connected to the second arc beam (17), the side end of the connecting beam (11) is fixedly connected to the first arc beam (13), the upper end of the first arc beam (13) is limited and connected to the butt reinforcing bar (12), the bottom of the second arc beam (17) is fixedly connected to the supporting side plate (18), the bottom of the first arc beam (13) is fixedly connected to the butt stabilizing seat (21), the lower end of the butt stabilizing seat (21) is fixedly connected to the diagonal bracing bar (20), and the lower end of the diagonal bracing bar (20) is fixedly connected to the butt supporting block (19). The load-bearing component (4) also includes a matching combined steel block (22), an inner frame (23), a combined steel frame (24), a through steel bar (25), and a support column frame (26). The lower end of the connecting support block (19) is fixedly connected to the matching combined steel block (22). The center of the matching combined steel block (22) is connected to the through steel bar (25). The through steel bar (25) is limited to a position between the combined steel frame (24) and the support column frame (26), and the combined steel frame (24) and the support column frame (26) are fixed together. The rear end of the combined steel frame (24) is fixedly connected to the inner frame (23), and the adaptive combined steel block (22), combined steel frame (24), through steel bar (25), and support column frame (26) are fixedly positioned as a whole.

2. The construction method based on prestressed beams and slabs for urban rail transit according to claim 1, characterized in that: The inclined tie bars (20) are set at an angle, and the upper end of the side beam (14) is fixed to the concrete slab (10).

3. The construction method based on prestressed beams and slabs for urban rail transit according to claim 2, characterized in that: The upper end of the butt reinforcing bar (12) is fixedly connected to the concrete slab (10), and the concrete slab (10), the butt reinforcing bar (12), and the side beam (14) are fixed together by concrete curing.

4. The construction method based on prestressed beams and slabs for urban rail transit according to claim 3, characterized in that: The first partition (5) and the second partition (8) are filled with concrete and the prestressed steel bars (6) are wrapped inside. Grouting holes are provided on the side ends of the prestressed steel bars (6) and the second partition (8).

5. The construction method based on prestressed beams and slabs for urban rail transit according to claim 4, characterized in that: The solid support block (15) and the built-in steel bars (16) are filled with concrete, and the space between the second arc beam (17) and the first arc beam (13) is also filled with concrete.

6. The construction method based on prestressed beams and slabs for urban rail transit according to claim 5, characterized in that: The prestressed steel bar (6) is fitted with a butt protective sleeve (27) at its center. The upper end of the butt protective sleeve (27) is connected to a through connecting seat (30). The upper end of the through connecting seat (30) is connected to a grouting port (29). A connecting groove (28) is opened at the center of the through connecting seat (30).

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