CN220118135U - Reinforced shield tunnel structure of special floating slab track bed - Google Patents

Reinforced shield tunnel structure of special floating slab track bed Download PDF

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Publication number
CN220118135U
CN220118135U CN202321672596.0U CN202321672596U CN220118135U CN 220118135 U CN220118135 U CN 220118135U CN 202321672596 U CN202321672596 U CN 202321672596U CN 220118135 U CN220118135 U CN 220118135U
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China
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floating slab
arc
special floating
slab track
steel
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CN202321672596.0U
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Inventor
庄群虎
查红星
刘建国
王加磊
秦奕旻
甘海杰
柳献
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Suzhou Rail Transit Group Co ltd
Tongji University
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Suzhou Rail Transit Group Co ltd
Tongji University
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Abstract

The utility model relates to a reinforced special floating slab track bed shield tunnel structure, which comprises tunnel segments, arc-shaped steel plates, special floating slab track beds, steel corbels and steel braces; the special floating slab track bed is supported on the tunnel segment; the arc-shaped steel plate is fixedly connected with the tunnel duct piece; the steel corbels are arranged at the ends of the arc-shaped steel plates at the two ends; the steel corbels are placed on a special floating slab track bed; the steel corbels on two sides are connected through steel braces, and the steel braces are fixedly connected with the steel corbels. Compared with the prior art, the structure of the utility model can effectively improve the strength and rigidity of the shield tunnel structure of the original special floating slab track bed and control the convergence deformation and crack development under the premise of ensuring that the vibration reduction performance of the special floating slab track bed is not affected, and has the advantages of convenient material taking, rapid construction, safety and reliability and wide application prospect.

Description

Reinforced shield tunnel structure of special floating slab track bed
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
The construction of urban underground rail transit is an important means for solving the problem of urban road transit, and is an important ring for 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. Along with the increase of the operation time, the shield tunnel structure is affected by factors such as peripheral engineering activities, geological condition changes, insufficient management experience and the like, and the shield tunnel structure gradually exposes diseases such as convergence deformation overrun, crack alignment, concrete damage and block dropping, water leakage and the like. Tunnel defect causes potential safety hazard for normal operation of tunnel. It is necessary to take effective reinforcement measures for the tunnel with the occurrence of the faults in time.
The steel plate reinforcement method is a reinforcement method for a damaged shield tunnel structure. The material manufacturing and construction methods are relatively simple, the influence on the original tunnel structure is small, and the material is widely applied in practice. The steel plate reinforcement method widely used at present is only generally applicable to an integral ballast shield tunnel structure. Along with the gradual lifting of the environmental protection requirements of track traffic construction, special floating slab ballast beds (track concave type steel spring floating slab ballast beds) with better vibration reduction effect are gradually paid attention to and widely adopted, and the trend of gradually replacing integral ballast beds is presented. But no shield tunnel structure for a reinforced special floating slab track bed is proposed at present.
Thus, there is a need for a special floating slab track bed shield tunnel structure for reinforcement.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a reinforced special floating slab track bed shield tunnel structure which can improve the bearing capacity of the special floating slab track bed shield tunnel lining structure and control the convergence deformation and crack development of the structure.
The aim of the utility model can be achieved by the following technical scheme:
the utility model provides a reinforced special floating slab track bed shield tunnel structure, which comprises tunnel segments, arc-shaped steel plates, special floating slab track beds, steel corbels and steel braces, wherein the arc-shaped steel plates are arranged on the tunnel segments; the special floating slab track bed is supported on the tunnel segment; the arc-shaped steel plate is fixedly connected with the tunnel duct piece; the steel corbels are arranged at the ends of the arc-shaped steel plates at the two ends; the steel corbels are placed on the special floating slab track bed, and the steel corbels are not rigidly connected with the special floating slab track bed; the steel corbels on two sides are connected through steel braces, and the steel braces are fixedly connected with the steel corbels.
Further, the special floating slab ballast bed is a track concave type steel spring floating slab ballast bed.
Further, the arc-shaped steel plate and the tunnel segment are connected with the poured epoxy resin through chemical anchor bolts.
Further, the special floating slab track bed comprises a track and a sleeper; the sleeper is arranged below the track.
Further, the special floating slab track bed also comprises concrete; the part of the concrete above the track plane before unreinforced is chiseled.
Further, a flat layer is arranged on the chiseled plane after the part, higher than the plane of the track, of the concrete is chiseled.
Further, the leveling layer is obtained by leveling the chiseled plane, so that the chiseled plane is aligned with the plane where the track is located, and the leveling layer is beneficial to using functions such as drainage in the tunnel.
Further, the leveling treatment can be performed by applying mortar on the chiseled surface, and the like.
Further, the leveling layer comprises mortar.
Further, the steel braces are disposed between the gaps of the ties; the steel brace is kept attached to the top surface of the special floating slab track bed; and an insulating gasket is arranged between the steel brace and the rail.
Further, the insulating gasket is an insulating gasket with adjustable thickness, so that the steel brace is kept attached to the top surface of the special floating slab track bed.
Further, the steel brace and the steel corbel are welded and connected through a connecting steel plate.
Further, the arc-shaped steel plates comprise 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, a sixth arc-shaped steel plate and a seventh arc-shaped steel plate which are sequentially connected, adjacent arc-shaped steel plates are connected through welding, groove welding is adopted for welding, and the whole steel plate width is welded.
Further, the reinforced special floating slab track shield tunnel structure further comprises rib plates which are longitudinally arranged along the tunnel and are connected with the steel corbels 7 through welding.
The reinforcing method of the reinforced special floating slab track bed shield tunnel structure comprises the following steps:
(A) Chiseling concrete of the upper part of the special floating slab track bed, which is higher than the track plane;
(B) Leveling the chiseled plane;
(C) Connect gradually each arc steel sheet, and arc steel sheet is connected with tunnel segment, and arc steel sheet 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 fifth arc-shaped steel plate, the sixth arc-shaped steel plate and the seventh arc-shaped steel plate;
(D) Steel corbels are arranged at the ends of the first arc-shaped steel plate and the seventh arc-shaped steel plate, are placed on the concrete special floating slab track bed which is chiseled and flattened in the step (A) and the step (B), and a gap is reserved between the steel corbels and the special floating slab track bed, so that rigid connection is not performed;
(E) Connecting the steel corbels at the two sides in the step (D) through steel braces;
(F) An insulating gasket is arranged between the steel brace and the track, and the thickness of the insulating gasket is adjusted to enable the steel brace to keep fit with the top surface of the special floating slab track bed.
Further, the step (A) is to chisel concrete of the upper part of the special floating slab track bed above the track plane, so as to create space conditions for installing the steel plate reinforcing structure. This portion of concrete is typically not stressed or structurally effective and may be chiseled. The concrete is usually reinforced by a structure, and the concrete needs to be removed by cutting the reinforcing steel together.
Further, the leveling process is performed on the chiseled plane in the step (B), so that the chiseled plane is aligned with the plane where the track is located, which is beneficial to the use functions such as drainage in the tunnel. The method can be carried out by coating mortar on the chiseled surface.
Further, seven arc-shaped steel plates are sequentially connected in the step (C), wherein adjacent arc-shaped steel plates are connected through welding, groove welding is adopted in welding, and the whole width of the steel plates is welded; the arc-shaped steel plate and the tunnel segment are connected with the poured epoxy resin through a chemical anchor bolt; an anchor bolt hole is reserved in the arc-shaped steel plate; a chemical anchor bolt is perforated and implanted on the tunnel segment; grouting holes are reserved in the arc-shaped steel plates.
Further, when installing the chemical anchor bolts, anchor bolt holes are reserved on the steel plates, the chemical anchor bolts are drilled and implanted at corresponding positions on the tunnel segment, and finally the arc-shaped steel plates are connected with the tunnel segment through nuts. When the epoxy resin is poured, edge sealing treatment is firstly carried out on the arc-shaped steel plate, and then the epoxy resin pouring is carried out through the reserved grouting holes.
Further, steel corbels are arranged at the ends of the first arc-shaped steel plate and the seventh arc-shaped steel plate in the step (D) and are placed on the concrete special floating slab track bed which is chiseled and flattened, rigid connection between the steel corbels and the special floating slab track bed is not required, and a certain gap is reserved for vibration deformation of the special floating slab track bed. The purpose of this step is to ensure that the damping performance of the particular floating slab track bed is not affected.
Further, in the step (E), the steel corbels on two sides are connected through steel braces, the steel braces are required to be welded and connected with the steel corbels through connecting steel plates, and the steel braces are arranged between gaps of the sleeper. The steel brace should be overcoat insulating rubber, avoids stray current to influence train operation safety.
And (C) setting an insulating gasket between the steel brace and the track in the step (F), and enabling the steel brace to be attached to the top surface of the special floating slab track bed by adjusting the thickness of the insulating gasket. The purpose of the device is to ensure that the steel brace cannot tilt and influence the running safety of the train when the special floating slab track bed generates vibration deformation.
Compared with the prior art, the utility model has the following beneficial effects:
1) The reinforced special floating slab track bed shield tunnel structure 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 shield tunnel structure can effectively improve the strength and rigidity of the special floating slab track shield tunnel structure on the premise of ensuring that the vibration damping performance of the special floating slab track is not affected, plays a role in controlling convergence deformation and crack development, is convenient to obtain materials, is quick to construct, is safe and reliable, and has a wide application prospect.
Drawings
FIG. 1 is a schematic cross-sectional view of a shield tunnel reinforced with a reinforced special floating slab track bed shield tunnel structure of the present utility model.
Fig. 2 is a detailed view of the assembly of arc-shaped steel plates in an embodiment of the utility model.
Fig. 3 is a top view of fig. 1.
Fig. 4 is a side view of fig. 1.
Fig. 5 is a partial enlarged view of fig. 1.
Reference numerals illustrate:
1-tunnel segment; 2-arc-shaped steel plates; 21-a first arc-shaped steel plate; 22-a second arc-shaped steel plate; 23-a third arc-shaped steel plate; 24-a fourth arc-shaped steel plate; 25-fifth arc-shaped steel plates; 26-sixth arc-shaped steel plates; 27-seventh arc-shaped steel plates; 3-chemical anchor bolts; 4-epoxy resin; 5-special floating slab ballast bed; 6-concrete; 7-steel corbels; 8-connecting steel plates; 9-steel bracing; 10-track; 11-sleeper; 12-insulating spacers; 13-rib plates; 14-void.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications in the shape of the openings can be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.
In the technical scheme, the characteristics of preparation means, materials, structures or composition ratios and the like which are not explicitly described are regarded as common technical characteristics disclosed in the prior art.
Examples
Referring to fig. 1 to 5, the present embodiment provides a reinforced special floating slab track bed shield tunnel structure, which comprises a tunnel segment 1, an arc-shaped steel plate 2, a chemical anchor bolt 3, epoxy resin 4, a special floating slab track bed 5, concrete 6, steel corbels 7, a connecting steel plate 8, steel braces 9, a track 10, a sleeper 11, an insulating spacer 12 and rib plates 13; the special floating slab track bed 5 is supported on the tunnel segment 1; the arc-shaped steel plate 2 is connected with the tunnel segment 1 through a chemical anchor bolt 3 and an epoxy resin 4; the steel corbels 7 are arranged at the end parts of the first arc-shaped steel plate 21 and the seventh arc-shaped steel plate 27; the steel corbels 7 are placed on the special floating slab ballast bed 5 which is subjected to chiseling and leveling treatment, and the steel corbels are not rigidly connected with the special floating slab ballast bed 5; a gap 14 is reserved between the steel corbel 7 and the special floating slab track bed 5; the steel corbels 7 on two sides are connected through steel braces 9, and the steel braces 9 are welded with the steel corbels 7 through connecting steel plates 8.
The special floating slab track bed 5 comprises a track 10 and a sleeper 11; the sleeper 11 is provided below the track 10. The special floating slab track bed 5 also comprises concrete 6; the portion of the concrete 6 that is above the plane of the track 10 before being unreinforced is chiseled. The chiseled-off plane after the portion of the concrete 6 above the plane of the rail 10 has been chiseled off is provided with a levelling layer. The leveling layer is obtained by leveling the chiseled plane, so that the chiseled plane is aligned with the plane of the track 10, and the leveling layer is beneficial to the use functions of drainage in the tunnel and the like. The leveling treatment may be performed by applying mortar to the chiseled surface, or the like, i.e. the leveling layer comprises mortar.
Steel braces 9 are arranged between the gaps of the sleepers 11; the steel brace 9 is kept attached to the top surface of the special floating slab track bed 5; an insulating spacer 12 is arranged between the steel brace 9 and the rail 10. The insulating spacer 12 is an insulating spacer 12 with adjustable thickness so as to keep the steel brace 9 attached to the top surface of the special floating slab track bed 5.
The arc-shaped steel plates 2 comprise 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, a sixth arc-shaped steel plate 26 and a seventh arc-shaped steel plate 27 which are sequentially connected, adjacent arc-shaped steel plates are connected through welding, groove welding is adopted for welding, and the whole steel plate width is welded.
The rib plates 13 are longitudinally arranged along the tunnel and are connected with the steel corbels 7 by welding.
The reinforcing method of the reinforced special floating slab track bed shield tunnel structure comprises the following steps:
step (a) chisels off the concrete 6 above the special floating slab track bed 5 above the plane of the track 10. This portion of concrete 6 is normally not stressed or structurally effective and can be chiseled. The concrete 6 is usually structured to be reinforced, and the concrete needs to be removed by cutting the reinforcing bars together.
And (B) flattening the chiseled plane. The aim is to align the plane after chiseling with the plane of the bottom of the track 10, which is beneficial to the use functions such as drainage in tunnels. The method can be carried out by coating mortar on the chiseled surface.
Step (C) is sequentially connected to 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, a sixth arc-shaped steel plate 26 and a seventh arc-shaped steel plate 27. The adjacent arc-shaped steel plates 2 are connected through welding, and the welding is performed by adopting groove welding and the whole width of the steel plates is welded through. The arc-shaped steel plate 2 and the tunnel segment 1 are connected with the poured epoxy resin 4 through a chemical anchor bolt 3. When the chemical anchor bolts 3 are installed, anchor bolt holes are reserved on the arc-shaped steel plates 2, the chemical anchor bolts are drilled and implanted at corresponding positions on the tunnel segment 1, and finally the arc-shaped steel plates 2 are connected with the tunnel segment 1 through nuts. When the epoxy resin 4 is poured, the edge sealing treatment is firstly carried out on the arc-shaped steel plate 1, and then the epoxy resin 4 is poured through the reserved grouting holes.
And (D) placing the steel corbels 7 arranged at the end parts of the first arc-shaped steel plate 21 and the seventh arc-shaped steel plate 27 on the concrete special floating slab track bed 5 subjected to chiseling and leveling treatment. The steel corbels 7 are required not to be rigidly connected with the special floating slab ballast bed 5, and a certain gap 14 is reserved for the vibration deformation of the special floating slab ballast bed 5. The purpose of this step is to ensure that the damping properties of the particular floating slab track bed 5 are not affected.
And (E) connecting the steel corbels 7 on the two sides through steel braces 9. The steel braces 9 and the steel corbels 7 are required to be welded and connected through the connecting steel plates 8, and the steel braces 9 are arranged between gaps of the sleeper 11. The steel brace 7 should be covered with insulating rubber to avoid stray current from affecting the running safety of the train.
And (F) arranging an insulating gasket 12 between the steel brace 9 and the track 10, and keeping the steel brace 9 attached to the top surface of the special floating slab track bed 5 by adjusting the thickness of the insulating gasket 12. The purpose of ensuring that the steel brace 9 is kept attached to the top surface of the special floating slab track bed 5 is to prevent the steel brace 9 from tilting and affecting the running safety of the train when the special floating slab track bed 5 is subjected to vibration deformation.
Embodiments of the utility model are described so as to enable one of ordinary skill in the art to make and use the utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.

Claims (10)

1. The reinforced special floating slab track bed shield tunnel structure is characterized by comprising tunnel segments (1), arc-shaped steel plates (2), special floating slab track beds (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 with the tunnel segment (1);
the steel corbels (7) are arranged at the end parts of the arc-shaped steel plates (2) at the two ends;
the steel corbels (7) are placed on a special floating slab track bed (5);
the steel corbels (7) on two sides are connected through steel braces (9), and the steel braces (9) are fixedly connected with the steel corbels (7).
2. The reinforced special floating slab track shield tunnel structure according to claim 1, wherein the arc-shaped steel plate (2) and the tunnel segment (1) are connected with the poured epoxy resin (4) through chemical anchor bolts (3).
3. A reinforced special floating slab track shield tunnel structure according to claim 1, characterized in that the special floating slab track (5) comprises a track (10), a sleeper (11);
the sleeper (11) is arranged 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) further comprises concrete (6);
the part of the concrete (6) before the reinforcement, which is higher than the plane of the rail (10), is chiseled.
5. A reinforced special floating slab track bed shield tunnel structure according to claim 4, characterized in that the chiseled-off plane of the portion of the concrete (6) above the plane of the track (10) is provided with a levelling layer.
6. A reinforced special floating slab track bed shield tunnel structure according to claim 5 wherein said flattening layer comprises mortar.
7. A reinforced special floating slab track 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 brace (9) is kept attached to the top surface of the special floating slab track bed (5);
an insulating gasket (12) is arranged between the steel brace (9) and the track (10).
8. A reinforced special floating slab track shield tunnel structure according to claim 7, characterized in that the insulating spacer (12) is an adjustable thickness insulating spacer (12) to keep the steel braces (9) in contact with the top surface of the special floating slab track bed (5).
9. A reinforced special floating slab track shield tunnel structure according to claim 1, characterized in that the steel braces (9) and the steel corbels (7) are welded by means of connecting steel plates (8).
10. The reinforced special floating slab track bed shield tunnel structure according to claim 1, wherein the arc-shaped steel plates (2) comprise 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), a sixth arc-shaped steel plate (26) and a seventh arc-shaped steel plate (27) which are sequentially connected.
CN202321672596.0U 2023-06-29 2023-06-29 Reinforced shield tunnel structure of special floating slab track bed Active CN220118135U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321672596.0U CN220118135U (en) 2023-06-29 2023-06-29 Reinforced shield tunnel structure of special floating slab track bed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321672596.0U CN220118135U (en) 2023-06-29 2023-06-29 Reinforced shield tunnel structure of special floating slab track bed

Publications (1)

Publication Number Publication Date
CN220118135U true CN220118135U (en) 2023-12-01

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ID=88913547

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Application Number Title Priority Date Filing Date
CN202321672596.0U Active CN220118135U (en) 2023-06-29 2023-06-29 Reinforced shield tunnel structure of special floating slab track bed

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CN (1) CN220118135U (en)

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