Seismic isolation tunnel concrete segments

Abstract

The present invention discloses a seismic isolation type tunnel concrete segment, including a concrete segment and an initial support steel arch frame, wherein the concrete segment is arc-shaped as a whole and is installed on the inner side of the initial support steel arch frame, and the concrete segment includes two tunnel side wall concrete segments and one tunnel top arch concrete segment, wherein the tunnel side wall concrete segments and the tunnel top arch concrete segments are both hollow cylindrical structures, and the tunnel side wall concrete segments and the tunnel top arch concrete segments are both provided with steel plates and seismic isolation damping structural units, wherein the seismic isolation damping structural units include a viscoelastic damping plate and an intermediate plate, wherein the steel plate is located at the center of the seismic isolation damping structural unit, and the two intermediate plates are respectively located on both sides of the steel plate, and the two viscoelastic damping plates are respectively located on the outer sides of the intermediate plate. The present invention performs seismic isolation of the overall structure of tunnels in high seismic damage areas, protects various facilities in the tunnel, and prolongs the service life of the tunnel.

Description

Technical Field

[0001] The invention relates to a tunnel, in particular to a seismic isolation type tunnel concrete segment. Background Art

[0002] At present, the seismic isolation and shock absorption technology in the field of housing construction in my country has gradually taken shape, but the seismic isolation and shock absorption technology for underground buildings still needs to be improved in the first stage. With the rapid development of the national economy, urban transportation has also developed rapidly, and tunnels are key facilities for road and railway transportation maintenance. The seismic isolation system of tunnels mainly depends on the strength and stiffness of the initial support and secondary lining. In some areas with low seismic damage and low seismic intensity, the existing technology can meet the safety of the tunnel, but in some areas with high seismic damage and high seismic intensity, the tunnel structure needs to be seismically isolated and shock-absorbed to ensure the safety of people's lives and property. Summary of the invention

[0003] The purpose of the present invention is to provide a seismic isolation type tunnel concrete segment, which has the characteristics of simple structure, safety and reliability, and can effectively solve the problem of seismic isolation and vibration reduction of tunnels in high seismic damage areas.

[0004] In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A seismic isolation type tunnel concrete segment comprises a concrete segment and an initial support steel arch frame, wherein the concrete segment is arc-shaped as a whole and is installed on the inner side of the initial support steel arch frame, wherein the concrete segment comprises two tunnel side wall concrete segments and one tunnel top arch concrete segment, wherein the tunnel top arch concrete segment is located at the tunnel top arch, and the two tunnel side wall concrete segments are respectively arranged on both sides of the tunnel top arch concrete segment and located at the side walls on both sides of the tunnel, wherein the tunnel side wall concrete segment and the tunnel top arch concrete segment are both hollow cylindrical structures, wherein steel plates and seismic isolation damping structural units are both arranged in the tunnel side wall concrete segment and the tunnel top arch concrete segment, wherein the seismic isolation damping structural unit comprises a viscoelastic damping plate and an intermediate plate, wherein the steel plate is located at the center of the seismic isolation damping structural unit, wherein two intermediate plates are respectively located on both sides of the steel plate, and wherein two viscoelastic damping plates are respectively located on the outer sides of the intermediate plate.

[0006] Furthermore, the tunnel side wall concrete segments and the tunnel top arch concrete segments are connected by welding with steel plates.

[0007] Furthermore, the tunnel side wall concrete segment is a single-cylinder structure, in which a seismic isolation and damping structure unit and a steel plate are arranged. The end of the steel plate away from the tunnel top arch concrete segment is flush with the seismic isolation and damping structure unit, and the end of the steel plate close to the tunnel top arch concrete segment extends out of the seismic isolation and damping structure unit.

[0008] Furthermore, the tunnel top arch concrete segment is a multi-cylinder structure, in which a plurality of seismic isolation and damping structural units and a steel plate are arranged, and the steel plate passes through a plurality of seismic isolation and damping structural units in sequence and extends out at both ends.

[0009] Furthermore, the concrete pipe segments are fixed to the sprayed concrete of the initial supporting steel arch frame by steel nails.

[0010] Furthermore, the middle plate is made of ABS plate; the viscoelastic damping plate is made of bisphenol A epoxy resin, the steel plate is made of SPCC cold-rolled steel plate, and the concrete is made of C30 waterproof concrete.

[0011] The advantages and beneficial effects of the present invention are:

[0012] The seismic isolation effect of the seismic isolation type tunnel concrete segment of the present invention is more reliable. The deformation and hysteresis energy dissipation effect of the viscoelastic material are used in the seismic isolation damping structural unit to dissipate the energy input by the earthquake, so as to increase the structural damping and achieve the purpose of seismic isolation. The viscoelastic material not only stores energy but also consumes energy, and can also delay structural deformation. The seismic isolation damping structural unit can provide greater damping, bear the energy released by the earthquake, and effectively limit the displacement of the initial support and secondary lining of the tunnel to achieve the purpose of seismic isolation, forming a comprehensive tunnel seismic isolation system with strong integrity, and isolating the overall structure of the tunnel in tunnels in high seismic damage areas. Protect various facilities in the tunnel and extend the service life of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of the overall structure of the seismic isolation tunnel concrete segment;

[0015] Figure 2 It is a schematic diagram of the seismic isolation and damping structural unit;

[0016] Figure 3 It is a schematic diagram of the connection of concrete segments to shotcrete;

[0017] Figure 4 This is the overall schematic diagram of the tunnel top arch concrete segment;

[0018] Figure 5 This is an overall schematic diagram of the tunnel side wall concrete segment.

[0019] Figure 1 In the middle: 1 is the concrete segment; 2 is the viscoelastic damping plate; 3 is the middle plate; 4 is the steel plate; 5 is the seismic isolation damping unit; 6 is the initial support steel arch frame; 7 is the tunnel side wall concrete segment; 8 is the tunnel top arch concrete segment; 9 is the steel plate welding point; 10 is the sprayed concrete on the initial support steel arch frame; 11 is the steel nail. DETAILED DESCRIPTION

[0020] In order to further illustrate the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0021] like Figure 1 As shown, the present invention is a seismic isolation type tunnel concrete segment, including a concrete segment 1 and an initial support steel arch frame 6, wherein the concrete segment 1 is arc-shaped as a whole and is installed on the inner side of the initial support steel arch frame 6, and the concrete segment 1 includes two tunnel side wall concrete segments 7 and a tunnel top arch concrete segment 8, and the tunnel top arch concrete segment 8 is located at the tunnel top arch, and the two tunnel side wall concrete segments 7 are respectively arranged on both sides of the tunnel top arch concrete segment 8 and are located at the side walls on both sides of the tunnel, and the tunnel side wall concrete segment 7 and the tunnel top arch concrete segment 8 are both hollow cylindrical structures, and steel plates and seismic isolation damping structural units 5 are arranged in the tunnel side wall concrete segment 7 and the tunnel top arch concrete segment 8.

[0022] like Figure 2 As shown, the seismic isolation and damping structure unit 5 includes a viscoelastic damping plate 2 and an intermediate plate 3. The steel plate is located at the center of the seismic isolation and damping structure unit 5. The two intermediate plates 3 are respectively located on both sides of the steel plate 4. The two viscoelastic damping plates 2 are respectively located on the outside of the intermediate plate.

[0023] like Figure 5 As shown, the tunnel side wall concrete segment 7 is a single cylinder structure, in which a seismic isolation damping structure unit and a steel plate are arranged. The end of the steel plate away from the tunnel top arch concrete segment is flush with the seismic isolation damping structure unit, and the end of the steel plate close to the tunnel top arch concrete segment extends out of the seismic isolation damping structure unit. Compared with ordinary steel plate concrete side wall segments, this structure has a lighter weight, greater strength, better stability, and can withstand greater lateral soil pressure.

[0024] like Figure 4 As shown, the tunnel arch concrete segment 8 is a multi-cylinder structure, in which a plurality of seismic isolation and damping structural units and a steel plate are arranged. The steel plate passes through a plurality of seismic isolation and damping structural units in sequence and extends at both ends. A plurality of seismic isolation and damping structural units 5 are arranged in the cylinder, so that its seismic isolation performance is better and can withstand greater vertical loads. The steel plates 4 are respectively passed through the tunnel side wall concrete segments 7 and the tunnel arch concrete segments 8 to form steel plate concrete. The steel plate concrete structure can increase the structural strength of the concrete segments. The steel plates extending from both ends of the tunnel arch concrete segment 8 are respectively welded to the steel plates extending from the tunnel side wall concrete segments 7 on both sides, and steel plate welding points 9 are formed at the joints.

[0025] like Figure 3 As shown, the concrete segment 1 is fixed to the sprayed concrete 10 of the initial supporting steel arch 6 by steel nails 11.

[0026] The middle plate 3 is made of ABS plate, which has strong durability and impact resistance; the viscoelastic damping plate 2 is made of bisphenol A epoxy resin, the steel plate 4 is made of SPCC cold-rolled steel plate, and the concrete is made of C30 waterproof concrete.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A seismic isolation tunnel concrete segment, characterized in that: The invention comprises a concrete pipe segment (1) and an initial support steel arch frame (6), wherein the concrete pipe segment (1) is in an arc shape as a whole and is installed inside the initial support steel arch frame (6), wherein the concrete pipe segment (1) comprises two tunnel side wall concrete pipe segments (7) and a tunnel top arch concrete pipe segment (8), wherein the tunnel top arch concrete pipe segment (8) is located at the tunnel top arch, and the two tunnel side wall concrete pipe segments (7) are respectively arranged on both sides of the tunnel top arch concrete pipe segment (8) and located at the side walls on both sides of the tunnel, and the tunnel side wall concrete pipe segments (8 ... The concrete pipe segment (7) and the tunnel top arch concrete pipe segment (8) are both hollow cylindrical structures. The tunnel side wall concrete pipe segment (7) and the tunnel top arch concrete pipe segment (8) are both provided with steel plates and seismic isolation damping structural units (5). The seismic isolation damping structural unit (5) comprises a viscoelastic damping plate (2) and an intermediate plate (3). The steel plate is located at the center of the seismic isolation damping structural unit (5). The two intermediate plates (3) are respectively located on both sides of the steel plate (4). The two viscoelastic damping plates (2) are respectively located on the outer sides of the intermediate plate. The tunnel side wall concrete segments (7) and the tunnel top arch concrete segments (8) are connected by welding with steel plates; The tunnel side wall concrete segment (7) is a single cylinder structure, in which a seismic isolation damping structure unit and a steel plate are arranged, wherein one end of the steel plate away from the tunnel top arch concrete segment is flush with the seismic isolation damping structure unit, and one end of the steel plate close to the tunnel top arch concrete segment protrudes out of the seismic isolation damping structure unit.

2. The seismic isolation type tunnel concrete segment according to claim 1, characterized in that: The tunnel top arch concrete segment (8) is a multi-cylinder structure, in which a plurality of seismic isolation and damping structural units and a steel plate are arranged, and the steel plate passes through a plurality of seismic isolation and damping structural units in sequence and extends at both ends.

3. The seismic isolation type tunnel concrete segment according to claim 1, characterized in that: The concrete pipe segment (1) is fixed to the sprayed concrete (10) of the initial supporting steel arch frame (6) by means of steel nails (11).

4. The seismic isolation type tunnel concrete segment according to claim 1, characterized in that: The intermediate plate (3) is made of ABS plate; the viscoelastic damping plate (2) is made of bisphenol A epoxy resin; the steel plate (4) is made of SPCC cold-rolled steel plate; and the concrete is made of C30 waterproof concrete.

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