Reinforcing mechanism for tunnel portal of metro contact channel

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a subway contact passage tunnel portal reinforcing mechanism which comprises a plurality of supporting units distributed at equal intervals, the adjacent supporting units are connected through connecting rods, the supporting units are annular supporting units, each supporting unit comprises a supporting main body arranged integrally, and the supporting main bodies are connected through connecting rods. The side supporting pieces are arranged on the two sides of the interior of the supporting main body, the integrally-arranged supporting main body is adopted, the annular supporting units are formed by combining the side supporting pieces, the top supporting pieces, the bottom supporting pieces and the connecting pieces, the overall structure is more stable, and the service life of the supporting main body is prolonged. Compared with the prior art that the problem that fatigue cracks are easily caused under subway vibration due to rivet connection is solved, complex stress generated in the tunnel portal breaking and stratum excavation process can be better borne, the stability of the structure under circumferential shearing force is particularly improved, and supporting failure caused by connection failure is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically a reinforcement mechanism for the portal of a subway connecting passage. Background Technology

[0002] With the continuous increase in the density of urban rail transit networks, subway connecting tunnels, as key node projects connecting tunnels of different lines, directly affect the safe operation of the entire subway system due to their construction safety and structural stability. When breaking through the tunnel portal and excavating the connecting tunnel, the shield tunnel lining structure at the construction location needs to be dismantled and removed. After the segments open, the stress system of the structure changes, resulting in uneven stress distribution and stress concentration, which reduces the support and protection effect on the segments and easily causes deformation of the segments themselves and surrounding tunnel segments. Therefore, segment support is needed for protection. The commonly used prestressed support method is to weld and assemble I-beams into a ring steel frame, and apply support force to it by extending the jack head radially along the segments.

[0003] A search revealed that Chinese utility model patent application number "202323057298.3" discloses a stabilizing device for an integrally supported shield tunnel portal structure. The device includes a segment ring assembled from multiple tunnel segments inside the shield tunnel on both sides of the portal. The stabilizing device comprises two annular frames, a rectangular frame, ten supporting mechanisms, and a fastening mechanism. The two annular frames are respectively located at the front and rear ends of the segment ring, including a front annular frame and a rear annular frame. The rectangular frame is fixed inside the two annular steel frames. The ten supporting mechanisms are located within the rectangular frame and the annular steel frame, serving to support the rectangular frame and the... The annular steel frame is tightly attached to the tunnel segment ring, and the fastening mechanism is fixed to the rectangular frame. The tunnel segment ring is provided with tunnel segment bolt hand holes. The fastening mechanism is fixed to the tunnel segment ring by screwing bolts into the tunnel segment bolt hand holes. This device is a stable device for connecting the frame structure of welded I-beams with the tunnel segments to form an integral portal, which improves the overall stress of the tunnel segments, reduces tunnel segment deformation, and stabilizes and reinforces the overall portal structure. However, the clamping plate and the annular frame in this device are connected by rivets. Under the 0.5-2Hz subway vibration load, the riveted structure cannot meet the circumferential shear resistance requirements required for the reinforcement of the connecting passage portal, which is prone to fatigue crack propagation.

[0004] Therefore, a mechanism for reinforcing subway tunnel portals is needed to address the aforementioned issues. Utility Model Content

[0005] The purpose of this utility model is to provide a reinforcement mechanism for the portal of a subway connecting passage, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A reinforcement mechanism for a subway connecting passage portal includes several equally spaced support units. Adjacent support units are connected by connecting rods. Each support unit is a ring-shaped support unit, which includes an integrally formed support body. Side support members are provided on both sides of the support body, a top support member is provided at the upper end of the support body, and a bottom support member is provided at the bottom end of the support body. Connecting members are provided between the side support members, the top support member, and the bottom support member on both sides.

[0008] As a preferred embodiment of this utility model, the support body is annular and includes a support ring. The outer side of the support ring has a groove, and a number of reinforcing plates are connected at equal intervals inside the groove.

[0009] As a preferred embodiment of this utility model, the support ring is provided with a plurality of openings at equal intervals, and the number of openings is not less than four.

[0010] As a preferred embodiment of this utility model, the side support member includes a side reinforcing plate fixedly connected to the inner side of the support ring, and the side reinforcing plate has a groove inside, with a plurality of inner inclined plates arranged inside the groove.

[0011] As a preferred embodiment of this utility model, the inner inclined plate is inclined.

[0012] As a preferred embodiment of this utility model, inclined plates are fixedly connected to both the upper and lower ends of the side reinforcing plate.

[0013] As a preferred embodiment of this utility model, the top support includes a top fixing plate, which is fixedly connected to the upper end of the support ring, and a recess is provided in the middle of the top fixing plate.

[0014] As a preferred embodiment of this utility model, the bottom support is a bottom plate, and a channel is left between the bottom plate and the inner side of the support ring.

[0015] As a preferred embodiment of this utility model, the connecting member includes an upper abutment plate and a lower abutment plate. The upper abutment plate is used to connect the inclined plate and the top fixing plate located at the upper end, and the lower abutment plate is used to connect the inclined plate and the bottom plate at the lower end.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model adopts an integrated support body and combines side support members, top support members, bottom support members and connecting members to form a ring support unit, which makes the overall structure more stable. Compared with the problem mentioned in the background technology that the use of rivet connection is prone to fatigue cracks under subway vibration, this mechanism, through the optimized design of connecting members (upper abutment plate, lower abutment plate), can better withstand the complex stress generated during the tunnel portal breaking and stratum excavation, especially improving the stability of the structure under circumferential shear force, and effectively preventing support failure due to connection failure;

[0018] 2. This utility model utilizes the groove and reinforcing plate design on the outer side of the support ring, along with the openings on the support ring, to form a graded force transmission path. This design can more evenly distribute the stress transferred after the segment opens to the entire support structure, avoiding excessive stress concentration. Combined with the inclined inner plate in the internal side support, it can guide and disperse lateral pressure, making the stress on the segment ring more uniform, thereby effectively reducing the risk of deformation of the segment itself and surrounding segments.

[0019] 3. This utility model forms a spatial truss system by connecting the side reinforcing plates with the top and bottom supports through inclined plates and connecting parts (upper and lower abutment plates). This multi-directional connection method not only enhances the overall rigidity of the structure, but also adapts to the small displacements and deformations that may occur during construction, and maintains the durability of the support effect. Attached Figure Description

[0020] Figure 1 This is a first-view perspective perspective view of the present invention;

[0021] Figure 2 This is a second-view perspective perspective view of the present invention;

[0022] Figure 3 This is the front view of the present invention;

[0023] Figure 4 This is an assembly diagram of the present invention.

[0024] In the diagram: 1. Support ring; 2. Connecting rod; 3. Reinforcing plate; 4. Opening; 5. Top plate; 6. Recess; 7. Side reinforcing plate; 8. Inner inclined plate; 9. Upper abutment plate; 10. Inclined plate; 11. Bottom plate; 12. Lower abutment plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figure 1-4 This utility model provides a technical solution:

[0030] For an example, please refer to... Figure 1 , 2 3 and 4, a reinforcement mechanism for a subway connecting passage portal, comprising several equally spaced support units, adjacent support units being connected by connecting rods 2, the support unit being a ring-shaped support unit, the support unit comprising an integrated support body, side support members being provided on both sides of the support body, a top support member being provided at the upper end of the support body, and a bottom support member being provided at the bottom end of the support body, with connecting members provided between the side support members, the top support member, and the bottom support member.

[0031] The entire reinforcement mechanism consists of multiple support units, which are connected at equal intervals by connecting rods 2. Connecting rods 2 ensure that all support units can support the entire connecting passage and the east gate, share the load, prevent excessive stress on a single unit, and ensure the continuity and stability of the overall structure through the connection between adjacent units.

[0032] Please refer to Figure 1 , 23 and 4, the main support body is ring-shaped and includes a support ring 1. The outer side of the support ring 1 is provided with a groove, and a number of reinforcing pieces 3 are connected at equal intervals inside the groove. A number of openings 4 are provided at equal intervals on the support ring 1, and the number of openings 4 is not less than 4.

[0033] The groove and reinforcing plate 3 on the support ring not only enhance the strength and deformation resistance of the support ring itself, but may also provide a structural basis for subsequent fixing or other auxiliary measures. The opening 4 is for the connecting rod 2 to be inserted and connected.

[0034] Please refer to Figure 1 , 2 3 and 4, the side support includes a side reinforcing plate 7 fixedly connected to the inner side of the support ring 1, and the inside of the side reinforcing plate 7 has a hollow groove, and a number of inner inclined plates 8 are provided inside the hollow groove, and the inner inclined plates 8 are inclined.

[0035] The side reinforcing plate 7 is connected to the inner side of the support ring 1 through several inner inclined plates 8, which increases the strength of the side of the support ring 1. The design of the inner inclined plates 8 allows the lateral pressure to be more evenly distributed to the internal structure of the support ring 1, reducing the risk of deformation of the side reinforcing plate itself.

[0036] The top support includes a top plate 5, which is fixedly connected to the upper end of the support ring 1. A recess 6 is provided in the middle of the top plate 5. The bottom support uses a bottom plate 11, and a channel is left between the bottom plate 11 and the inner side of the support ring 1. The top support mainly supports the top area of ​​the support ring 1 through the top plate 5 to prevent deformation of the top area of ​​the support ring 1. The bottom support mainly strengthens the bottom area of ​​the support ring 1 through the bottom plate 11 to prevent deformation.

[0037] Both ends of the side reinforcing plate 7 are fixedly connected to inclined plates 10. The connecting parts include an upper abutment plate 9 and a lower abutment plate 12. The upper abutment plate 9 is used to connect the inclined plate 10 at the upper end and the top fixing plate 5, and the lower abutment plate 12 is used to connect the inclined plate 10 at the lower end and the bottom plate 11.

[0038] The inclined plates 10 at both ends of the side reinforcing plate 7 act as a bridge to connect and transmit forces, guiding a portion of the lateral force to the top and bottom of the structure. The upper abutment plate 9 connects the inclined plate 10 at the upper end and the top fixing plate 5, effectively transferring the top axial force from the top support to the side support, ensuring that the top support can function stably. The lower abutment plate 12 connects the inclined plate 10 at the lower end and the bottom plate 11, effectively transferring the bottom axial force from the side support to the bottom support, ensuring that the side support can function stably.

[0039] 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 reinforcement mechanism for a subway connecting passage portal, comprising a plurality of equally spaced support units, wherein adjacent support units are connected by connecting rods (2), characterized in that: The support unit is a ring-shaped support unit, which includes an integrated support body. Side support members are provided on both sides of the support body, a top support member is provided at the upper end of the support body, and a bottom support member is provided at the bottom end of the support body. Connecting members are provided between the side support members, the top support member, and the bottom support member on both sides.

2. The subway connecting passage portal reinforcement mechanism according to claim 1, characterized in that: The supporting body is ring-shaped and includes a supporting ring (1). The outer side of the supporting ring (1) has a groove, and a number of reinforcing pieces (3) are connected at equal intervals inside the groove.

3. The subway connecting passage portal reinforcement mechanism according to claim 2, characterized in that: The support ring (1) has a number of holes (4) at equal intervals, and the number of holes (4) is not less than 4.

4. The subway connecting passage portal reinforcement mechanism according to claim 2 or 3, characterized in that: The side support includes a side reinforcing plate (7) fixedly connected to the inner side of the support ring (1), and the inside of the side reinforcing plate (7) has a groove, and a number of inner inclined plates (8) are provided inside the groove.

5. The subway connecting passage portal reinforcement mechanism according to claim 4, characterized in that: The inner inclined plate (8) is set at an angle.

6. The subway connecting passage portal reinforcement mechanism according to claim 5, characterized in that: Both ends of the side reinforcing plate (7) are fixedly connected with inclined plates (10).

7. The subway connecting passage portal reinforcement mechanism according to claim 6, characterized in that: The top support includes a top fixing plate (5), which is fixedly connected to the upper end of the support ring (1), and a recess (6) is provided in the middle of the top fixing plate (5).

8. The subway connecting passage portal reinforcement mechanism according to claim 7, characterized in that: The bottom support is a base plate (11), and a channel is left between the base plate (11) and the inner side of the support ring (1).

9. The subway connecting passage portal reinforcement mechanism according to claim 8, characterized in that: The connector includes an upper abutment plate (9) and a lower abutment plate (12). The upper abutment plate (9) is used to connect the inclined plate (10) and the top fixing plate (5) located at the upper end, and the lower abutment plate (12) is used to connect the inclined plate (10) at the lower end and the bottom plate (11).

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