An assembled structure without temporary support within the limit range of existing rail area of subway

Abstract

The utility model belongs to the field of subway construction technology, and disclose a kind of assembly type structure in the limit range of subway existing rail area without temporary support. The structure includes reinforced concrete beam embedded plate, profiled steel sheet, bolt and combined floor, and the reinforced concrete beam embedded plate is embedded in reinforced concrete beam by floor pouring for fixing bolt, and the steel beam made of profiled steel sheet is connected with reinforced concrete beam by bolt fusion welding to form combined floor, and the combined floor is installed above the limit protection range of rail area and the lower surface does not intrude into the limit. The utility model is constructed under the condition of no temporary support in the limit protection range of subway existing rail area, uses steel reinforced concrete combined floor construction technology, avoids the interference of construction on train operation, ensures the normal operation of subway vehicle, and has good practicality and economic benefit.

Description

Technical Field

[0001] This utility model belongs to the field of subway construction technology, specifically a prefabricated structure without temporary support within the existing track area of ​​a subway. Background Technology

[0002] With the rapid development of urban rail transit, the demand for construction, renovation, and functional expansion of existing subway depot track areas is increasing. As the core area for subway vehicle operation, the track area is crucial for safe operation; any construction interference may lead to serious safety accidents and operational delays.

[0003] In traditional subway track construction or renovation, temporary supports are typically installed to support construction loads and the structure's own weight. However, the installation of temporary supports presents several problems. Firstly, temporary supports occupy space within the track area, inevitably disrupting normal operation and affecting subway train throughput. This may even necessitate temporary closures of track operations, causing inconvenience to citizens and significant economic losses. Secondly, the installation and removal of temporary supports are complex and time-consuming. Furthermore, the stability of temporary supports cannot be fully guaranteed during construction, posing safety hazards. Support failure could lead to structural collapse and other accidents, threatening the safety of construction workers and track operations. The installation of temporary supports also occupies track space, interfering with subway train operation and negatively impacting normal train operation. This creates a conflict between construction and train operation, affecting subway operational efficiency and safety.

[0004] Therefore, there is an urgent need for a prefabricated structure that can be constructed without temporary support and without interfering with subway operation. Utility Model Content

[0005] This utility model aims to solve the problem that construction within the existing track area boundary protection zone of subway depots requires the installation of temporary supports, which interferes with train operation. It provides a prefabricated structure without temporary supports within the existing track area boundary of subways.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated structure without temporary support within the existing track area of ​​a subway, comprising a reinforced concrete beam body on both sides of the subway track, including a reinforced concrete beam embedded plate, profiled steel sheet, studs, and a composite floor slab; the reinforced concrete beam embedded plate is pre-embedded in the reinforced concrete beam body under the floor slab through multiple pourings, and the studs are used for fixing;

[0007] The profiled steel sheet is used to make steel beams, and the two ends of the steel beams are connected to the main body of the reinforced concrete beam through embedded plates of the reinforced concrete beam for placing the composite floor slab.

[0008] The composite floor slab is installed above the track clearance protection area of ​​the existing subway depot. Its lower surface does not intrude into the track clearance. Both ends are connected to the main body of the reinforced concrete beams on both sides of the track area. The composite floor slab is composed of multiple concrete floor slabs. Each concrete floor slab has positioning holes on both sides that are compatible with studs.

[0009] Preferably, the embedded plate of the reinforced concrete beam is made of high-strength steel and has an L-shaped rectangular flat plate structure. The embedded plate of the reinforced concrete beam is provided with a number of anchor bars on the side facing the interior of the main body of the reinforced concrete beam. The anchor bars are welded and fixed perpendicularly to the embedded plate of the reinforced concrete beam.

[0010] Preferably, the embedded plate of the reinforced concrete beam and the main body of the reinforced concrete beam are firmly connected by the phased pouring of the floor slab.

[0011] Preferably, the studs are fixedly connected to the upper edge of the steel beam made of profiled steel sheet by fusion welding.

[0012] Preferably, the profiled steel sheet is arranged in an I-shape, and multiple sets of first reinforcing ribs are integrally formed on the concave surfaces on both sides of the profiled steel sheet.

[0013] Preferably, the first reinforcing rib is arranged in a triangular structure, the right angle position of the first reinforcing rib is in contact with the right angle of the groove of the profiled steel sheet, and the first reinforcing rib is arranged in a supporting manner at the concave position of the profiled steel sheet.

[0014] Preferably, a second reinforcing rib with a straight line structure is integrally formed at the center of the concave surface of the profiled steel sheet. The second reinforcing rib is disposed between multiple sets of first reinforcing ribs, and the first reinforcing ribs are connected to the second reinforcing ribs.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model, under the condition of no temporary support within the track zone clearance protection area of ​​an existing subway depot, avoids interference with train operation by using this steel-concrete composite floor slab construction technology, ensuring that subway train operation is unaffected and the normal operation of the subway is guaranteed. It also improves the safety and efficiency of construction. The first and second reinforcing ribs set in the profiled steel sheet enhance the overall stability and load-bearing capacity of the structure, ensuring that the profiled steel sheet can stably support the composite floor slab and avoid problems such as displacement and loosening of the composite floor slab due to deformation of the profiled steel sheet. This, in turn, ensures the safe and reliable operation of the entire prefabricated structure within the clearance area of ​​the existing subway track zone. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure assembly of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the anchor bar structure in this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the first and second reinforcing ribs of this utility model.

[0021] In the diagram: 1. Main body of reinforced concrete beam; 2. Embedded plate of reinforced concrete beam; 4. Stud; 5. Composite floor slab; 6. Anchor bar; 7. First reinforcing bar; 8. Second reinforcing bar. Detailed Implementation

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

[0023] like Figures 1 to 4 As shown, this utility model provides a prefabricated structure without temporary support within the existing track area of ​​a subway, including a reinforced concrete beam body 1 set on both sides of the subway track, including a reinforced concrete beam embedded plate 2, a profiled steel sheet 3, studs 4, and a composite floor slab 5; the reinforced concrete beam embedded plate 2 is pre-embedded in the reinforced concrete beam body 1 under the floor slab through the floor slab in stages, and the studs 4 are used for fixing.

[0024] The profiled steel sheet 3 is used to make steel beams. The two ends of the steel beams are connected to the main body of the reinforced concrete beam 1 through the embedded plate 2 of the reinforced concrete beam to place the composite floor slab 5.

[0025] The composite floor slab 5 is installed above the track area clearance protection zone of the existing subway depot. Its lower surface does not intrude into the track area clearance. Both ends are connected to the main reinforced concrete beams 1 on both sides of the track area. The composite floor slab 5 is composed of multiple concrete floor slabs. Each concrete floor slab has positioning holes on both sides that are compatible with the studs 4.

[0026] The reinforced concrete beam embedded plate 2 is made of high-strength steel and is usually an L-shaped rectangular flat plate structure. Its thickness is determined according to the actual stress requirements, generally between 10-20mm. The length and width are designed according to the spacing of the reinforced concrete beam body 1 and the connection requirements with the studs 4 and steel beams. The two ends of the composite floor slab 5 are connected to the reinforced concrete beam body 1 on both sides of the track area. Through the connection structure of the reinforced concrete beam embedded plate 2 and the studs 4, the profiled steel sheet 3 is erected between the two reinforced concrete beams to form a horizontal structure spanning the track area. This installation position not only meets the spatial requirements of structural construction but also ensures that the subway vehicles will not come into contact with or interfere with the composite floor slab 5 when passing normally in the track area below.

[0027] The embedded plate 2 of the reinforced concrete beam is made of high-strength steel and has an L-shaped rectangular flat plate structure. Several anchor bars 6 are provided on the side of the embedded plate 2 facing the interior of the reinforced concrete beam body 1. The anchor bars 6 are vertically welded and fixed to the embedded plate 2. The surface of the embedded plate 2 is smooth and flat to facilitate welding connection with the studs 4. The number, diameter, and length of the anchor bars 6 are calculated and determined based on the dimensions of the embedded plate and the required load. The anchor bars 6 enhance the connection strength between the embedded plate 2 and the reinforced concrete beam body 1, preventing the embedded plate 2 from detaching from the reinforced concrete beam body 1 under load.

[0028] The embedded plate 2 of the reinforced concrete beam and the main body 1 of the reinforced concrete beam are firmly connected by the phased pouring of the floor slab.

[0029] The stud 4 is fixedly connected to the upper edge of the steel beam by welding with the profiled steel sheet 3, which improves the stability of the individual concrete floor slab of the composite floor slab 5. The individual concrete floor slab has positioning holes on both sides that are compatible with the stud 4, making assembly convenient and quick.

[0030] The profiled steel sheet 3 is designed in an I-shape, and multiple sets of first reinforcing ribs 7 are integrally formed on the concave surfaces of both sides of the profiled steel sheet 3. The first reinforcing ribs 7 are triangular in structure, with their right angles fitting against the right angles of the grooves in the profiled steel sheet 3. The first reinforcing ribs 7 are positioned in a supporting manner at the concave positions of the profiled steel sheet 3. The steel beam made of the profiled steel sheet 3 needs to bear the combined floor slab 5 and other loads that may exist above it. The triangular structure of the first reinforcing ribs 7, with their right angles fitting against the right angles of the grooves in the profiled steel sheet 3, has the characteristics of good stability and strong resistance to deformation. The supporting manner at the concave positions of the profiled steel sheet 3 can effectively disperse the pressure borne in this area, resist the local deformation caused by the force on the groove part of the profiled steel sheet 3, and enhance the local load-bearing capacity of the profiled steel sheet 3 at the right angle of the groove.

[0031] At the center of the concave surface of the profiled steel sheet 3, a second reinforcing rib 8 with a straight-line structure is integrally formed. This second reinforcing rib 8 is positioned between multiple sets of first reinforcing ribs 7, with the first reinforcing ribs 7 connected to the second reinforcing rib 8. The second reinforcing rib 8, being a straight-line structure, connects the dispersed first reinforcing ribs 7 into a unified whole, forming a more stable reinforcement system. This connection method effectively transfers loads, making the deformation of each part of the profiled steel sheet 3 more coordinated under stress, reducing the overall structural deflection, significantly enhancing the overall stiffness of the profiled steel sheet 3, ensuring that it does not undergo excessive bending deformation under load, and guaranteeing the structural stability of the steel beam.

[0032] Working principle and process: During construction, the main body of the reinforced concrete beam 1 is constructed first. During the construction process, the pre-embedded plate 2 of the reinforced concrete beam is pre-embedded in the main body of the reinforced concrete beam under the floor slab by pouring the floor slab in stages, so as to ensure that the position of the pre-embedded plate is accurate and the fixation is firm, providing a reliable foundation for the subsequent fixing of the studs 4.

[0033] Next, the profiled steel sheet 3 is processed into steel beams, and the two ends of the steel beams are connected to the embedded plates 2 of the reinforced concrete beams on the reinforced concrete beams by fusion welding. This makes the steel beams and reinforced concrete beams form a whole, which together support the composite floor slab 5. The composite floor slab 5 is installed above the track clearance protection range of the existing subway depot, with both ends overlapping the reinforced concrete beams on both sides, and the lower surface maintaining a safe distance from the track clearance.

[0034] The combined effect of the first reinforcing rib 7 and the second reinforcing rib 8 reduces the risk of damage to the profiled steel sheet 3 due to fatigue stress, thus extending its service life. Simultaneously, they ensure that the profiled steel sheet 3 can stably support the composite floor slab 5, preventing displacement or loosening of the composite floor slab 5 due to deformation of the profiled steel sheet 3, thereby guaranteeing the safe and reliable operation of the entire prefabricated structure within the existing track clearance area of ​​the subway.

[0035] Since the combined floor slab structure does not require temporary supports, it will not occupy the track area space during construction, thus avoiding interference with subway operation and ensuring the normal operation of subway vehicles.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated structure without temporary support within the existing track clearance area of ​​a subway, comprising reinforced concrete beams (1) on both sides of the subway track, characterized in that: It includes a reinforced concrete beam embedded plate (2), a profiled steel sheet (3), a stud (4), and a composite floor slab (5); the reinforced concrete beam embedded plate (2) is embedded in the main body (1) of the reinforced concrete beam under the floor slab through the floor slab in stages, and the stud (4) is used for fixing; The profiled steel sheet (3) is used to make steel beams. The two ends of the steel beams are connected to the main body of the reinforced concrete beam (1) through the embedded plate (2) of the reinforced concrete beam for placing the composite floor slab (5). The composite floor slab (5) is installed above the track clearance protection area of ​​the existing subway depot. Its lower surface does not intrude into the track clearance. Both ends are connected to the main body of the reinforced concrete beam (1) on both sides of the track area. The composite floor slab (5) is composed of multiple concrete floor slabs. Each concrete floor slab has positioning holes on both sides that are compatible with the studs (4).

2. The prefabricated structure without temporary support within the existing track clearance area of ​​a subway as described in claim 1, characterized in that: The embedded plate (2) of the reinforced concrete beam is made of high-strength steel and has an L-shaped rectangular flat plate structure. The embedded plate (2) of the reinforced concrete beam has several anchor bars (6) on one side facing the interior of the main body (1) of the reinforced concrete beam. The anchor bars (6) are welded and fixed perpendicularly to the embedded plate (2).

3. The prefabricated structure without temporary support within the existing track clearance area of ​​a subway as described in claim 1, characterized in that: The embedded plate (2) of the reinforced concrete beam and the main body of the reinforced concrete beam (1) are firmly connected by the floor slab being poured in stages.

4. The prefabricated structure without temporary support within the existing track clearance area of ​​a subway as described in claim 1, characterized in that: The stud (4) is fixedly connected to the upper edge of the steel beam by welding with the profiled steel sheet (3).

5. A prefabricated structure without temporary support within the existing track clearance area of ​​a subway, as described in claim 1, is characterized in that: The profiled steel sheet (3) is arranged in an I-shape, and multiple sets of first reinforcing ribs (7) are integrally formed on the concave surfaces on both sides of the profiled steel sheet (3).

6. A prefabricated structure without temporary support within the existing track clearance area of ​​a subway, as described in claim 5, is characterized in that: The first reinforcing rib (7) is arranged in a triangular structure. The right angle position of the first reinforcing rib (7) is in contact with the right angle of the groove of the profiled steel plate (3). The first reinforcing rib (7) is arranged in a counter-supporting manner at the concave position of the profiled steel plate (3).

7. A prefabricated structure without temporary support within the existing track clearance area of ​​a subway, as described in claim 1, is characterized in that: The concave surface of the profiled steel sheet (3) is integrally formed with a second reinforcing rib (8) of a straight line structure. The second reinforcing rib (8) is arranged between multiple sets of first reinforcing ribs (7), and the first reinforcing ribs (7) are connected to the second reinforcing ribs (8).

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