CN220118135U - A reinforced special floating slab track bed shield tunnel structure - Google Patents

Abstract

The utility model relates to a reinforced special floating plank bed shield tunnel structure. The reinforced special floating plank bed shield tunnel structure includes tunnel segments, arc-shaped steel plates, special floating plank bed, steel corbels, Steel braces; the special floating slab track bed is supported on the tunnel segment; the arc-shaped steel plate is fixedly connected to the tunnel segment; the steel corbels are provided at the ends of the arc-shaped steel plates at both ends; the steel corbels are placed On a special floating plank bed; the steel corbels on both sides are connected by steel braces, and the steel braces and steel corbels are fixedly connected. Compared with the existing technology, the structure of the present utility model can effectively improve the strength and stiffness of the original special floating slab track bed shield tunnel structure while ensuring that the vibration damping performance of the special floating slab track bed is not affected, and control Convergent deformation and crack development are easy to obtain, fast to construct, safe and reliable, and has broad application prospects.

Description

A reinforced special floating slab track bed shield tunnel structure

Technical field

The utility model relates to the technical field of tunnel engineering, in particular to a reinforced special floating slab track bed shield tunnel structure.

Background technique

The construction of urban underground rail transit is an important means to solve urban road traffic problems and an important part of the development and utilization of underground space. With the construction of urban rail transit, shield tunnels have been widely used in urban underground rail transit. As the operation time increases, affected by factors such as surrounding engineering activities, changes in geological conditions, and lack of management experience, the shield tunnel structure gradually exposes defects such as excessive convergence deformation, cracks, broken concrete, and water leakage. Phenomenon. Tunnel diseases cause safety hazards to the normal operation of tunnels. It is very necessary to take timely and effective reinforcement measures for tunnels that have become damaged.

The steel plate reinforcement method is a reinforcement method for damaged shield tunnel structures. Its material production and construction methods are relatively simple, have little impact on the original tunnel structure, and have been widely used in practice. The currently widely used steel plate reinforcement method is usually only suitable for integral track bed shield tunnel structures. With the gradual improvement of environmental protection requirements for rail transit construction, special floating track beds with better vibration damping effects (concave steel spring floating track beds under the track) have gradually attracted attention and been widely used, and have gradually replaced the integral track bed. the trend of. However, no special floating slab track bed shield tunnel structure for reinforcement has been proposed yet.

Therefore, a special floating slab track bed shield tunnel structure for reinforcement is urgently needed.

Utility model content

The purpose of this utility model is to propose a reinforced special floating slab track bed shield tunnel structure in order to overcome the above-mentioned defects in the prior art, which can improve the bearing capacity of the special floating slab track bed shield tunnel lining structure and control Structural convergence deformation and crack development.

The purpose of this utility model can be achieved through the following technical solutions:

The utility model provides a reinforced special floating plank bed shield tunnel structure. The reinforced special floating plank bed shield tunnel structure includes tunnel segments, arc-shaped steel plates, special floating plank bed, and steel corbels. , steel braces; the special floating slab track bed is supported on the tunnel segment; the arc-shaped steel plate is fixedly connected to the tunnel segment; the steel corbels are provided at the ends of the arc-shaped steel plates at both ends; the steel corbels Placed on a special floating plank bed, there is no rigid connection between the steel corbels and the special floating plank bed; the steel corbels on both sides are connected by steel braces, and the steel braces and steel corbels are fixedly connected.

Furthermore, the special floating plank bed is a steel spring floating plank bed with concave rails.

Further, the arc-shaped steel plate and the tunnel segment are connected through chemical anchor bolts and infused epoxy resin.

Further, the special floating track bed includes a track and a sleeper; the sleeper is provided below the track.

Furthermore, the special floating track bed also includes concrete; the part of the unreinforced concrete that is higher than the track plane is chiseled out.

Further, a smoothing layer is provided on the chiseled plane after the part of the concrete that is higher than the track plane is chiseled away.

Furthermore, the smoothing layer is obtained by smoothing the cut-out plane. The purpose is to align the cut-out plane with the plane where the track is located, which is beneficial to drainage and other functions in the tunnel.

Further, the smoothing treatment can be performed by applying mortar on the chiseled surface.

Further, the smoothing layer includes mortar.

Further, the steel braces are arranged between the gaps of the sleepers; the steel braces are kept close to the top surface of the special floating track bed; and insulating gaskets are provided between the steel braces and the track.

Furthermore, the insulating gasket is an insulating gasket with an adjustable thickness to keep the steel braces in close contact with the top surface of the special floating board track bed.

Further, the steel braces and the steel corbels are welded and connected by connecting steel plates.

Further, the arc-shaped steel plate includes a first arc-shaped steel plate, a second arc-shaped steel plate, a third arc-shaped steel plate, a fourth arc-shaped steel plate, a fifth arc-shaped steel plate, and a sixth arc-shaped steel plate that are connected in sequence. Arc-shaped steel plates and the seventh arc-shaped steel plate should be connected by welding between adjacent arc-shaped steel plates. The welding should use groove welding and penetrate the entire width of the steel plate.

Furthermore, the reinforced special floating slab track bed shield tunnel structure also includes ribs, which are arranged longitudinally along the tunnel and are connected to the steel corbels 7 by welding.

The reinforcement method of the above-mentioned reinforced special floating slab track bed shield tunnel structure includes the following steps:

(A) Remove the concrete on the upper part of the special floating slab track bed that is higher than the track plane;

(B) Smooth the chisel plane;

(C) Connect each arc-shaped steel plate in sequence, and the arc-shaped steel plate is connected to the tunnel segment. The arc-shaped steel plate includes: the first arc-shaped steel plate, the second arc-shaped steel plate, the third arc-shaped steel plate, the fourth arc-shaped steel plate The curved steel plate, the fifth curved steel plate, the sixth curved steel plate and the seventh curved steel plate;

(D) The first arc-shaped steel plate and the seventh arc-shaped steel plate are equipped with steel corbels at their ends, and are placed on the special concrete floating slab track bed that has been chiselled and leveled in steps (A) and (B). , and leave a gap between the steel corbels and the special floating slab track bed without making a rigid connection;

(E) Connect the steel corbels on both sides described in step (D) through steel braces;

(F) Set an insulating gasket between the steel braces and the track, and adjust the thickness of the insulating gasket to keep the steel braces in contact with the top surface of the special floating track bed.

Furthermore, the purpose of removing the concrete above the track plane on the special floating slab track bed described in step (A) is to create space conditions for the installation of the steel plate reinforcement structure. This part of the concrete usually has no stress-bearing or structural role and can be chiseled away. This part of the concrete usually contains structural reinforcement, and this part of the steel needs to be cut off when the concrete is removed.

Further, the purpose of smoothing the cut-out plane in step (B) is to align the cut-out plane with the plane where the track is located, which is beneficial to drainage and other functions in the tunnel. This can be done by applying mortar to the chiseled surface.

Furthermore, when connecting seven arc-shaped steel plates in sequence as described in step (C), adjacent arc-shaped steel plates should be connected by welding. The welding should use groove welding and penetrate the entire steel plate width; the arc-shaped steel plates and the tunnel The segments should be connected through chemical anchor bolts and infused epoxy resin; anchor holes are reserved on the arc-shaped steel plate; chemical anchor bolts are drilled into the tunnel segments; and injection holes are reserved on the arc-shaped steel plate. pulp hole.

Furthermore, when installing chemical anchors, anchor holes should first be reserved on the steel plate, and chemical anchors should be drilled and implanted at corresponding positions on the tunnel segments. Finally, the arc-shaped steel plates and tunnel segments should be connected through nuts. . When pouring epoxy resin, the curved steel plate should be edge-sealed first, and then the epoxy resin should be poured through the reserved grouting holes.

Further, the ends of the first arc-shaped steel plate and the seventh arc-shaped steel plate described in step (D) are provided with steel corbels and placed on the concrete floating slab track bed that has been chiseled and leveled. There is no rigid connection between the corbels and the special floating board track bed, leaving a certain gap for the vibration deformation of the special floating board track bed. The purpose of this step is to ensure that the vibration damping properties of the special floating slab track bed are not affected.

Further, the step (E) of connecting the steel braces on both sides through steel braces requires that the steel braces and the steel braces are welded and connected by connecting steel plates, and the steel braces are arranged between the gaps of the sleepers. The steel braces should be coated with insulating rubber to prevent stray current from affecting the safety of train operation.

Further, in step (F), an insulating gasket is provided between the steel braces and the track, and the thickness of the insulating gasket is adjusted to keep the steel braces in contact with the top surface of the special floating track bed. Its purpose is to ensure that when the special floating track bed vibrates and deforms, the steel stays will not warp and affect the safety of train operation.

Compared with the existing technology, this utility model has the following beneficial effects:

1) The reinforced special floating slab track bed shield tunnel structure of the present utility model fully considers the actual situation of the special floating slab track bed subway shield tunnel, and is a practical reinforced special floating slab track bed shield. Tunnel structure.

2) The reinforced special floating slab track bed shield tunnel structure of the present utility model can effectively improve the strength and strength of the special floating slab track bed shield tunnel structure while ensuring that the vibration damping performance of the special floating slab track bed is not affected. Stiffness, and plays a role in controlling convergence deformation and crack development. It is easy to obtain materials, fast in construction, safe and reliable, and has broad application prospects.

Description of the drawings

Figure 1 is a schematic cross-sectional view of a shield tunnel reinforced by the special floating slab track bed shield tunnel structure of the present utility model.

Figure 2 is a detailed assembly diagram of the arc-shaped steel plate in the embodiment of the present utility model.

FIG. 3 is a top view of FIG. 1 .

Figure 4 is a side view of Figure 1.

Figure 5 is a partial enlarged view of Figure 1.

Explanation of reference symbols:

1-tunnel segment; 2-curved steel plate; 21-the first curved steel plate; 22-the second curved steel plate; 23-the third curved steel plate; 24-the fourth curved steel plate; 25- The fifth curved steel plate; 26-The sixth curved steel plate; 27-The seventh curved steel plate; 3-Chemical anchor bolt; 4-Epoxy resin; 5-Special floating slab track bed; 6-Concrete; 7 -Steel corbels; 8-connecting steel plates; 9-steel braces; 10-tracks; 11-sleepers; 12-insulating gaskets; 13-ribs; 14-gaps.

Detailed ways

The utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. The following examples will help those skilled in the art further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements in the shape of the openings without departing from the concept of the present invention. These all belong to the protection scope of the present utility model.

Features such as preparation methods, materials, structures or composition ratios that are not explicitly stated in this technical solution are regarded as common technical features disclosed in the prior art.

Example

Referring to Figures 1-5, this embodiment provides a reinforced special floating slab track bed shield tunnel structure. The reinforced special floating slab track bed shield tunnel structure includes tunnel segments 1, arc-shaped steel plates 2, and chemical anchors. 3. Epoxy resin 4. Special floating slab track bed 5. Concrete 6. Steel corbels 7. Connecting steel plates 8. Steel braces 9. Tracks 10. Sleepers 11. Insulating gaskets 12. Ribs 13; special floating slabs The track bed 5 is supported on the tunnel segment 1; the arc-shaped steel plate 2 and the tunnel segment 1 are connected to the infused epoxy resin 4 through chemical anchor bolts 3; steel corbels 7 are provided on the first arc-shaped steel plate 21 and the seventh arc The end of the shaped steel plate 27; the steel corbels 7 are placed on the special floating slab track bed 5 that has been chiseled out and leveled. There is no rigid connection between the steel corbels 7 and the special floating slab track bed 5; the steel corbels 7 and the special floating slab track bed 5 are not rigidly connected. A gap 14 is reserved between the slab track beds 5; the steel brackets 7 on both sides are connected by steel braces 9, and the steel braces 9 and the steel brackets 7 are welded and connected by a connecting steel plate 8.

The special floating slab track bed 5 includes a track 10 and a sleeper 11; the sleeper 11 is provided below the track 10. The special floating slab track bed 5 also includes concrete 6; the part of the unreinforced concrete 6 that is higher than the plane of the track 10 is chiseled out. After the part of the concrete 6 that is higher than the plane of the track 10 is cut out, a leveling layer is provided on the cut out surface. The smoothing layer is obtained by smoothing the cut-out plane. The purpose is to align the cut-out plane with the plane where the track 10 is located, which is beneficial to drainage and other functions in the tunnel. The smoothing treatment can be carried out by applying mortar on the chiseled surface, that is, the smoothing layer includes mortar.

The steel braces 9 are arranged between the gaps of the sleepers 11; the steel braces 9 are kept close to the top surface of the special floating track bed 5; an insulating gasket 12 is provided between the steel braces 9 and the track 10. The insulating gasket 12 is an insulating gasket 12 with adjustable thickness to keep the steel brace 9 and the top surface of the special floating board track bed 5 close to each other.

The arc-shaped steel plate 2 includes a first arc-shaped steel plate 21, a second arc-shaped steel plate 22, a third arc-shaped steel plate 23, a fourth arc-shaped steel plate 24, a fifth arc-shaped steel plate 25, and a sixth arc-shaped steel plate 25 connected in sequence. The first arc-shaped steel plate 26 and the seventh arc-shaped steel plate 27 should be connected by welding between adjacent arc-shaped steel plates. The welding should use groove welding and weld through the entire width of the steel plate.

The ribs 13 are arranged longitudinally along the tunnel and are connected to the steel corbels 7 by welding.

The reinforcement method of the above-mentioned reinforced special floating slab track bed shield tunnel structure includes the following steps:

Step (A) Remove the concrete 6 on the upper part of the special floating slab track bed 5 that is higher than the plane of the track 10 . This part of concrete 6 usually does not have a force-bearing or structural role and can be chiseled away. Structural reinforcement is usually carried out in this part of the concrete 6, and this part of the steel bar needs to be cut off when the concrete is removed.

Step (B) smoothes the chisel plane. The purpose is to align the removed plane with the plane at the bottom of the track 10, which is beneficial to drainage and other functions in the tunnel. This can be done by applying mortar to the chiseled surface.

Step (C) sequentially connects the first arc-shaped steel plate 21, the second arc-shaped steel plate 22, the third arc-shaped steel plate 23, the fourth arc-shaped steel plate 24, the fifth arc-shaped steel plate 25, and the sixth arc-shaped steel plate. shaped steel plate 26 and the seventh arc-shaped steel plate 27. Adjacent arc-shaped steel plates 2 should be connected by welding, and groove welding should be used to weld through the entire width of the steel plate. The arc-shaped steel plate 2 and the tunnel segment 1 should be connected through chemical anchor bolts 3 and infused epoxy resin 4. When installing chemical anchor bolts 3, the anchor holes should be reserved first on the arc-shaped steel plate 2, and chemical anchor bolts should be drilled and implanted at the corresponding positions on the tunnel segment 1. Finally, the arc-shaped steel plate 2 should be connected to the tunnel through nuts. Segments 1 are connected. When pouring epoxy resin 4, the curved steel plate 1 should be edge-sealed first, and then the epoxy resin 4 should be poured through the reserved grouting holes.

Step (D) Place the steel corbels 7 provided at the ends of the first arc-shaped steel plate 21 and the seventh arc-shaped steel plate 27 on the concrete floating slab track bed 5 that has been chiseled out and leveled. It is required that there is no rigid connection between the steel corbels 7 and the special floating slab track bed 5, leaving a certain gap 14 for the vibration deformation of the special floating slab track bed 5. The purpose of this step is to ensure that the vibration damping performance of the special floating slab track bed 5 is not affected.

Step (E) Connect the steel corbels 7 on both sides through steel braces 9 . It is required that the steel braces 9 and the steel corbels 7 are welded and connected by the connecting steel plate 8, and the steel braces 9 are arranged between the gaps of the sleepers 11. The steel brace 7 should be coated with insulating rubber to prevent stray current from affecting the safety of train operation.

Step (F): Set an insulating gasket 12 between the steel brace 9 and the track 10, and adjust the thickness of the insulating gasket 12 to keep the steel brace 9 and the top surface of the special floating slab track bed 5 close to each other. The purpose of ensuring that the steel braces 9 remain in contact with the top surface of the special floating track bed 5 is to prevent the steel braces 9 from warping and affecting the safety of train operation when the special floating track bed 5 vibrates and deforms.

The implementation examples of the present utility model are described to facilitate those of ordinary skill in the technical field to understand and use the present utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without inventive efforts. Therefore, the present utility model is not limited to the above-mentioned embodiments. Based on the disclosure of the present utility model, improvements and modifications made by those skilled in the art without departing from the scope of the present utility model should be within the protection scope of the present utility model.

Claims (10)

1. A reinforced special floating slab track bed shield tunnel structure, characterized in that the reinforced special floating slab track bed shield tunnel structure includes tunnel segments (1), arc-shaped steel plates (2), special floating slab track beds. Equipped with plank track bed (5), steel corbels (7), and steel braces (9); The special floating slab track bed (5) is supported on the tunnel segment (1); The arc-shaped steel plate (2) is fixedly connected to the tunnel segment (1); The steel corbels (7) are provided at the ends of the arc-shaped steel plates (2) at both ends; The steel corbels (7) are placed on the special floating plank bed (5); The steel corbels (7) on both sides are connected by steel braces (9), and the steel braces (9) and the steel corbels (7) are fixedly connected. 2. A reinforced special floating slab track bed shield tunnel structure according to claim 1, characterized in that the arc-shaped steel plate (2) and the tunnel segment (1) are connected to each other through chemical anchor bolts (3). Pour epoxy resin (4) to connect. 3. A reinforced special floating slab track bed shield tunnel structure according to claim 1, characterized in that the special floating slab track bed (5) includes a track (10) and a sleeper (11); The sleeper (11) is located below the track (10). 4. A reinforced special floating slab track bed shield tunnel structure according to claim 3, characterized in that the special floating slab track bed (5) also includes concrete (6); The part of the unreinforced concrete (6) that is higher than the plane of the track (10) is chiseled away. 5. A reinforced special floating slab track bed shield tunnel structure according to claim 4, characterized in that the part of the concrete (6) that is higher than the plane of the track (10) is the chiseled plane. There is a flat floor. 6. A reinforced special floating slab track bed shield tunnel structure according to claim 5, characterized in that the smoothing layer includes mortar. 7. A reinforced special floating slab track bed shield tunnel structure according to claim 4, characterized in that the steel braces (9) are arranged between the gaps of the sleepers (11); The steel braces (9) are kept close to the top surface of the special floating slab track bed (5); An insulating gasket (12) is provided between the steel brace (9) and the track (10). 8. A reinforced special floating slab track bed shield tunnel structure according to claim 7, characterized in that the insulating gasket (12) is an insulating gasket (12) with adjustable thickness, so that the steel The tie bars (9) are kept close to the top surface of the special floating slab track bed (5). 9. A reinforced special floating slab track bed shield tunnel structure according to claim 1, characterized in that the steel brace (9) and the steel corbel (7) are connected by a connecting steel plate (8) Solder connection. 10. A reinforced special floating slab track bed shield tunnel structure according to claim 1, characterized in that the arc-shaped steel plate (2) includes a first arc-shaped steel plate (21), a third arc-shaped steel plate (21) and a third arc-shaped steel plate (21) connected in sequence. Two curved steel plates (22), the third curved steel plate (23), the fourth curved steel plate (24), the fifth curved steel plate (25), the sixth curved steel plate (26), the Seven curved steel plates (27).