CN212803246U - Anti-deformation shock-absorbing protection structure for tunnel top - Google Patents
Anti-deformation shock-absorbing protection structure for tunnel top Download PDFInfo
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- CN212803246U CN212803246U CN202021486064.4U CN202021486064U CN212803246U CN 212803246 U CN212803246 U CN 212803246U CN 202021486064 U CN202021486064 U CN 202021486064U CN 212803246 U CN212803246 U CN 212803246U
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 128
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
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- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000003139 buffering effect Effects 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 12
- 239000011435 rock Substances 0.000 description 11
- 239000004567 concrete Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 238000012986 modification Methods 0.000 description 2
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- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
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- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000011378 shotcrete Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
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Abstract
The utility model provides a tunnel top anti-deformation shock-absorbing protection structure, which belongs to the technical field of tunnel structure safety and comprises an outer layer supporting arch frame reinforcing plate, a middle and inner layer supporting arch frame reinforcing plate, an inner layer supporting arch frame reinforcing plate, a coordination connecting fixing rod, a locking and reinforcing screw part, a hoop part structure, an internal anti-seismic buffer setting layer, an internal mixed supporting and reinforcing medium layer, a lateral part bearing and supporting pile structure, a connecting and supporting fixing plate, an internal supporting fixed connecting bottom plate and an external supporting fixed connecting top plate, wherein the outmost layer of the tunnel top anti-deformation shock-absorbing protection structure is provided with the external supporting fixed connecting top plate, and the inner side of the external supporting fixed connecting top plate is provided with the outer layer supporting arch frame reinforcing plate, the utility model has the advantages of limiting the convergence deformation of the existing tunnel structure, being fast and convenient to disassemble, effectively avoiding the main structure of the tunnel from being, the self-bearing capacity of the soil body on the top of the tunnel structure is remarkably improved.
Description
Technical Field
The utility model belongs to the technical field of tunnel structure safety, especially, relate to a tunnel top resistance to deformation shock attenuation protection architecture.
Background
In mountain tunnel construction, the new Austrian method is generally taken as a theoretical basis, namely, the self-supporting capability of surrounding rocks is maintained and utilized as a base point, anchor rods and sprayed concrete are taken as main supporting means, supporting is carried out in time, and deformation and looseness of the surrounding rocks are controlled, so that the surrounding rocks become a component of a supporting system. However, in the construction process, it is found that the geological conditions of the surrounding rock are complex and changeable, the self-bearing capacity of the surrounding rock is weak in a rock mass crushing area, particularly in a fracture crushing zone area, the structure of the surrounding rock is extremely unstable, and great influence is caused on the safety of the tunnel. However, due to the restriction of the space in the cavern and the construction trolley and the influence of the construction process, the primary lining cannot be closed to form a ring in time, the construction of the secondary lining is usually lagged behind that of the primary lining, and the construction interval generally reaches more than 70 m. Before the primary lining is sealed to form a ring, the end part of the steel arch frame is generally reinforced by the foot-locking anchor rod, but surrounding rock is broken in a broken and broken zone, the reinforcing effect of the foot-locking anchor rod is limited, and grouting needs a period of time to play an anchoring effect, so that the primary lining collapse accident often occurs in engineering, and the construction progress and the engineering safety are seriously influenced. At present, in order to limit the convergence deformation of a tunnel, a transverse supporting beam with two ends respectively hinged on the inner wall of the tunnel is generally adopted, the beam can only limit the extrusion deformation of two sides of the tunnel and cannot provide upward supporting force for a steel arch frame, sometimes, when a special condition such as an earthquake occurs, the main structure of a mountain tunnel is vibrated to generate earthquake reaction, and the main structure is possibly damaged in a strong earthquake, so that the problems that loss control, safety factor increase and structural vibration reaction reduction are required to be solved currently in series of projects such as mountain tunnel building structures and the like are solved to the greatest extent, the adverse factors provide greater challenges for the construction safety of tunnel portals, and as the road tunnel span is increasingly large at present, the tunnel section tends to be flattened from the conventional two-lane tunnel to the conventional four-lane tunnel, the surrounding rock deformation is difficult to control, and the design construction technology is more complex. The profile steel arch frame for primary lining of the tunnel plays a role in lifting weight in tunnel construction, bears surrounding rock pressure before primary lining is not formed, and bears subsequent surrounding rock pressure together with primary lining concrete-shaped formed steel concrete.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that above-mentioned exists, the utility model provides a tunnel top resistance to deformation shock attenuation protection architecture can resist the emergence of the inside both sides extrusion deformation condition of tunnel structure, can play the supporting role effectively to the tunnel structure top, effectively avoid tunnel major structure to be destroyed in the macroseism, carry out high-efficient support to the loose soil body in tunnel top, can show promotion tunnel structure top soil body self-supporting ability and anti deformability, guarantee that tunnel structure construction progress is safe high-efficient reasonable.
In order to realize the purpose, the utility model discloses a technical scheme be:
an anti-deformation shock-absorbing protection structure for the top of a tunnel comprises an outer supporting arch frame reinforcing plate, a middle and inner supporting arch frame reinforcing plate, an inner supporting arch frame reinforcing plate, a coordination connection fixing rod, a locking reinforcing screw part, a hoop part structure, an internal anti-seismic buffer setting layer, an internal mixed supporting reinforcing medium layer, a lateral bearing supporting pile structure, a connecting supporting fixing plate, an internal supporting fixed connection bottom plate and an external supporting fixed connection top plate, wherein the outermost layer of the anti-deformation shock-absorbing protection structure for the top of the tunnel is provided with the external supporting fixed connection top plate, the inner side of the external supporting fixed connection top plate is provided with the outer supporting arch frame reinforcing plate, the inner side of the outer supporting arch frame reinforcing plate is provided with the middle and outer supporting arch frame reinforcing plates, the inner side of the middle and outer supporting arch frame reinforcing plate is provided with the middle and inner supporting arch frame reinforcing plates, the inner side of the inner layer supporting arch frame reinforcing plate is provided with an inner support fixedly connected with a bottom plate; the outer layer supporting arch frame reinforcing plate is formed by alternately connecting outer layer convex waveband arch supporting node plates and outer layer concave waveband concave supporting node plates, the middle and outer layer supporting arch frame reinforcing plate is formed by alternately connecting middle and inner layer convex waveband arch supporting node plates and middle and outer layer concave waveband concave supporting node plates, the middle and inner layer supporting arch frame reinforcing plate is formed by alternately connecting middle and inner layer convex waveband arch supporting node plates and middle and inner layer concave waveband concave supporting node plates, and the inner layer supporting arch frame reinforcing plate is formed by alternately connecting inner layer convex waveband arch supporting node plates and inner layer concave waveband concave supporting node plates;
a connecting and supporting fixing plate is arranged to fixedly connect the bottom end of the inner support fixedly connected bottom plate with the bottom end of the outer support fixedly connected top plate, a lateral part bearing and supporting pile structure is arranged below the connecting and supporting fixing plate, one end of the lateral part bearing and supporting pile structure is fixed with the ground, and the other end of the lateral part bearing and supporting pile structure is fixedly connected with the connecting and supporting fixing plate;
a built-in anti-seismic buffer setting layer is arranged between the outer layer supporting arch frame reinforcing plate and the outer support fixed connection top plate, between the middle and inner layer supporting arch frame reinforcing plate and between the inner layer supporting arch frame reinforcing plate and the inner support fixed connection bottom plate; built-in mixed supporting and reinforcing medium layers are arranged between the outer supporting arch reinforcing plate and the middle outer supporting arch reinforcing plate and between the middle inner supporting arch reinforcing plate and the inner supporting arch reinforcing plate; the method comprises the following steps of arranging a hoop member structure to fixedly connect an outer layer supporting arch frame reinforcing plate with an outer support fixed connection top plate, and an inner layer supporting arch frame reinforcing plate with an inner support fixed connection bottom plate respectively, wherein the hoop member structure is formed by combining a penetrating rod and a fixing nut; the coordination connection fixing rods are arranged to fixedly connect the outer layer supporting arch frame reinforcing plate and the middle and outer layer supporting arch frame reinforcing plate, the middle and outer layer supporting arch frame reinforcing plate and the middle and inner layer supporting arch frame reinforcing plate respectively, the middle and inner layer supporting arch frame reinforcing plate and the inner layer supporting arch frame reinforcing plate, and the locking reinforcement screw pieces are adopted at two ends to fix the two ends.
Furthermore, the built-in anti-seismic buffer setting layer is made of foamed aluminum materials.
Further, the outer layer supporting arch frame reinforcing plate, the middle and inner layer supporting arch frame reinforcing plate and the inner layer supporting arch frame reinforcing plate are made of low yield point steel plates determined according to design requirements.
Furthermore, the built-in mixed support reinforcing medium layer is prepared by mixing polyvinyl alcohol or polypropylene emulsion and lightweight concrete, and rubber particles are added into the built-in mixed support reinforcing medium layer.
Furthermore, the outer layer convex waveband arch support joint plate is tangent to the inner surface of the outer support fixed connection top plate, and the inner layer concave waveband concave support joint plate is tangent to the outer surface of the inner support fixed connection bottom plate.
Furthermore, the concave supporting node plates of the outer concave wave band are tangent to the arched supporting node plates of the middle and outer convex wave bands, the concave supporting node plates of the middle and outer concave wave bands are tangent to the arched supporting node plates of the middle and inner convex wave bands, and the concave supporting node plates of the middle and inner concave wave bands are tangent to the arched supporting node plates of the inner convex wave bands.
The utility model has the advantages of effect:
the beneficial effects of the utility model are that can play the supporting role effectively to the tunnel structure top, tunnel structure top appears collapsing danger in avoiding the work progress, can restrict current tunnel structure convergence deformation to furthest, show the stability ability that increases the support to the tunnel structure main part, the shock attenuation guarantee device installation is swift and disassemble the convenience, can bear great deformation simultaneously and play the antidetonation and support and eliminate the effect of vibrations, the reinforcing plate of setting can guarantee the whole intensity of supporting of device, effectively avoid tunnel main part structure to be destroyed in the strong earthquake, can carry out high-efficient support to the loose soil body in tunnel top, show promotion tunnel structure top soil body self-carrying capacity and anti deformability, guarantee tunnel structure construction progress safety high efficiency reasonable.
Drawings
Fig. 1 is a side view of the deformation-resistant shock-absorbing protection structure for tunnel top according to the present invention.
Fig. 2 is a structural schematic diagram of the fastening member.
FIG. 3 is a schematic view of the outer layer supporting arch reinforcing plate structure.
Fig. 4 is a schematic diagram of the structure of the reinforcing plate of the middle and outer supporting arch frames.
FIG. 5 is a schematic view of the reinforcing plate structure of the middle and inner supporting arch.
FIG. 6 is a schematic view of the inner supporting arch stiffener structure.
In the figure: 1 is an outer layer supporting arch frame reinforcing plate; 2, an outer layer convex wave band arch-shaped supporting joint plate; 3 is an outer concave wave band concave supporting joint plate; 4 is a middle and outer layer supporting arch frame reinforcing plate; 5 is an arch supporting joint plate with middle and outer layers of convex wave bands; 6 is a concave supporting joint plate of the middle and outer layers of concave wave bands; 7 is a middle-inner layer supporting arch frame reinforcing plate; 8 is an arch supporting joint plate with a middle-inner layer protruding wave band; 9 is a concave supporting joint plate with a concave waveband at the middle and inner layers; 10 is an inner layer supporting arch frame reinforcing plate; 11 is an inner-layer convex waveband arch-shaped supporting joint plate; 12 is an inner-layer concave wave band concave supporting joint plate; 13 is a coordination connection fixing rod; 14 is a locking reinforcing screw; 15 is a fastening piece structure; 16 is a through rod; 17 is a fixed nut; 18 is a built-in anti-seismic buffer setting layer; 19 is a built-in mixed supporting and reinforcing medium layer; 20, a side bearing and supporting pile structure; 21 is a connecting supporting fixing plate; 22 is an inner support fixedly connected with the bottom plate; and 23, fixedly connecting the top plate with an external support.
Detailed Description
For further explanation of the present invention, the following detailed description of the present invention is provided with reference to the drawings and examples, which should not be construed as limiting the scope of the present invention.
Example (b): as shown in fig. 1 to 6, a tunnel top anti-deformation shock-absorbing protection structure comprises an outer layer supporting arch reinforcing plate 1, a middle and outer layer supporting arch reinforcing plate 4, a middle and inner layer supporting arch reinforcing plate 7, an inner layer supporting arch reinforcing plate 10, a coordinating connection fixing rod 13, a locking and reinforcing screw 14, a hoop member structure 15, a built-in anti-seismic buffer setting layer 18, a built-in mixed supporting and reinforcing medium layer 19, a lateral part bearing and supporting pile structure 20, a connection supporting fixing plate 21, an inner support fixed connection bottom plate 22 and an outer support fixed connection top plate 23, wherein the outermost layer of the tunnel top anti-deformation shock-absorbing protection structure is provided with the outer support fixed connection top plate 23, the inner side of the outer support fixed connection top plate 23 is provided with the outer layer supporting arch reinforcing plate 1, the inner side of the outer layer supporting arch reinforcing plate 1 is provided with the middle and outer layer supporting arch reinforcing plate 4, the inner side of the middle and outer layer supporting arch reinforcing plate 4 is provided with the middle and inner, the inner side of the middle-inner layer supporting arch reinforcing plate 7 is provided with an inner layer supporting arch reinforcing plate 10, and the inner side of the inner layer supporting arch reinforcing plate 10 is provided with an inner support fixedly connected bottom plate 22; the outer layer supporting arch frame reinforcing plate 1 is formed by alternately connecting outer layer convex wave band arch supporting node plates 2 and outer layer concave wave band concave supporting node plates 3, the middle and outer layer supporting arch frame reinforcing plate 4 is formed by alternately connecting middle and outer layer convex wave band arch supporting node plates 5 and middle and outer layer concave wave band concave supporting node plates 6, the middle and inner layer supporting arch frame reinforcing plate 7 is formed by alternately connecting middle and inner layer convex wave band arch supporting node plates 8 and middle and inner layer concave wave band concave supporting node plates 9, and the inner layer supporting arch frame reinforcing plate 10 is formed by alternately connecting inner layer convex wave band arch supporting node plates 11 and inner layer concave wave band concave supporting node plates 12;
a connecting and supporting fixing plate 21 is arranged to fixedly connect the bottom end of an inner support fixed connection bottom plate 22 with the bottom end of an outer support fixed connection top plate 23, a lateral bearing and supporting pile structure 20 is arranged below the connecting and supporting fixing plate 21, one end of the lateral bearing and supporting pile structure 20 is fixed with the ground, and the other end of the lateral bearing and supporting pile structure is fixedly connected with the connecting and supporting fixing plate 21;
a built-in anti-seismic buffer setting layer 18 is arranged between the outer layer supporting arch reinforcing plate 1 and the outer supporting fixed connection top plate 23, between the middle and outer layer supporting arch reinforcing plate 4 and the middle and inner layer supporting arch reinforcing plate 7, and between the inner layer supporting arch reinforcing plate 10 and the inner supporting fixed connection bottom plate 22; built-in mixed supporting and reinforcing medium layers 19 are arranged between the outer supporting arch reinforcing plate 1 and the middle outer supporting arch reinforcing plate 4 and between the middle inner supporting arch reinforcing plate 7 and the inner supporting arch reinforcing plate 10; a hoop member structure 15 is arranged to fixedly connect the outer layer supporting arch frame reinforcing plate 1 with an outer support fixed connection top plate 23, the inner layer supporting arch frame reinforcing plate 10 with an inner support fixed connection bottom plate 22 respectively, and the hoop member structure 15 is formed by combining a through rod 16 and a fixing nut 17; the outer layer supporting arch reinforcing plate 1, the middle and outer layer supporting arch reinforcing plate 4, the middle and inner layer supporting arch reinforcing plate 7 and the inner layer supporting arch reinforcing plate 10 are fixedly connected through the coordination connecting fixing rod 13, and the two ends of the coordination connecting rod are fixed through the locking reinforcing screw pieces 14.
The built-in anti-seismic buffer layer 18 is made of foamed aluminum material.
The outer supporting arch reinforcing plate 1, the middle and outer supporting arch reinforcing plate 4, the middle and inner supporting arch reinforcing plate 7 and the inner supporting arch reinforcing plate 10 are made of low yield point steel plates determined according to design requirements.
The built-in mixed supporting and reinforcing medium layer 19 is made by mixing polyvinyl alcohol or polypropylene emulsion and lightweight concrete, and rubber particles are added in the built-in mixed supporting and reinforcing medium layer.
The outer convex waveband arch supporting joint plate 2 is tangent to the inner surface of the outer support fixed connection top plate 23, and the inner concave waveband concave supporting joint plate 12 is tangent to the outer surface of the inner support fixed connection bottom plate 22.
The concave supporting joint plates 3 of the outer concave wave band are tangent to the arched supporting joint plates 5 of the middle and outer convex wave bands, the concave supporting joint plates 6 of the middle and inner concave wave bands are tangent to the arched supporting joint plates 8 of the middle and inner convex wave bands, and the concave supporting joint plates 9 of the middle and inner concave wave bands are tangent to the arched supporting joint plates 11 of the inner convex wave bands.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a tunnel top resistance to deformation shock attenuation protection architecture, including outer layer support bow member reinforcing plate (1), well outer layer support bow member reinforcing plate (4), well inlayer support bow member reinforcing plate (7), inlayer support bow member reinforcing plate (10), coordinate connecting rod (13), screw (14) are consolidated in the locking, hoop structure (15), built-in antidetonation buffering sets up layer (18), built-in hybrid stay strengthens dielectric layer (19), the lateral part bears supports pilework (20), joint support fixed plate (21), internal stay fixed connection bottom plate (22), external stay fixed connection top plate (23), its characterized in that: the outmost layer of the tunnel top anti-deformation shock absorption protection structure is provided with an outer support fixed connection top plate (23), the inner side of the outer support fixed connection top plate (23) is provided with an outer support arch frame reinforcing plate (1), the inner side of the outer support arch frame reinforcing plate (1) is provided with a middle outer support arch frame reinforcing plate (4), the inner side of the middle outer support arch frame reinforcing plate (4) is provided with a middle inner support arch frame reinforcing plate (7), the inner side of the middle inner support arch frame reinforcing plate (7) is provided with an inner support arch frame reinforcing plate (10), and the inner side of the inner support arch frame reinforcing plate (10) is provided with an inner support fixed connection bottom plate (22); the outer layer supporting arch centering reinforcing plate (1) is formed by alternately connecting outer layer convex wave band arch supporting node plates (2) and outer layer concave wave band concave supporting node plates (3), the middle and outer layer supporting arch centering reinforcing plate (4) is formed by alternately connecting middle and outer layer convex wave band arch supporting node plates (5) and middle and outer layer concave wave band concave supporting node plates (6), the middle and inner layer supporting arch centering reinforcing plate (7) is formed by alternately connecting middle and inner layer convex wave band arch supporting node plates (8) and middle and inner layer concave wave band concave supporting node plates (9), and the inner layer supporting arch centering reinforcing plate (10) is formed by alternately connecting inner layer convex wave band arch supporting node plates (11) and inner layer concave wave band concave supporting node plates (12); a connecting and supporting fixing plate (21) is arranged to fixedly connect the bottom end of an inner support fixedly-connected bottom plate (22) with the bottom end of an outer support fixedly-connected top plate (23), a lateral bearing and supporting pile structure (20) is arranged below the connecting and supporting fixing plate (21), one end of the lateral bearing and supporting pile structure (20) is fixed with the ground, and the other end of the lateral bearing and supporting pile structure is fixedly connected with the connecting and supporting fixing plate (21); an internal anti-seismic buffer setting layer (18) is arranged between the outer layer supporting arch reinforcing plate (1) and the outer support fixed connection top plate (23), between the middle and outer layer supporting arch reinforcing plate (4) and the middle and inner layer supporting arch reinforcing plate (7), and between the inner layer supporting arch reinforcing plate (10) and the inner support fixed connection bottom plate (22); an internal mixed supporting and reinforcing medium layer (19) is arranged between the outer supporting arch reinforcing plate (1) and the middle outer supporting arch reinforcing plate (4) and between the middle inner supporting arch reinforcing plate (7) and the inner supporting arch reinforcing plate (10); the method comprises the following steps that a hoop member structure (15) is arranged to fixedly connect an outer layer supporting arch frame reinforcing plate (1) with an outer support fixed connection top plate (23), an inner layer supporting arch frame reinforcing plate (10) with an inner support fixed connection bottom plate (22) respectively, and the hoop member structure (15) is formed by combining a penetrating rod (16) and a fixing nut (17); the outer layer supporting arch frame reinforcing plate (1) and the middle and outer layer supporting arch frame reinforcing plate (4), the middle and inner layer supporting arch frame reinforcing plate (7) and the inner layer supporting arch frame reinforcing plate (10) are fixedly connected through the coordinated connection fixing rods (13), and the locking reinforcing screw pieces (14) are adopted at two ends for fixing.
2. The tunnel roof deformation-resistant shock-absorbing protection structure as claimed in claim 1, wherein: the built-in anti-seismic buffer layer (18) is made of foamed aluminum material.
3. The tunnel roof deformation-resistant shock-absorbing protection structure as claimed in claim 1, wherein: the outer supporting arch reinforcing plate (1), the middle and outer supporting arch reinforcing plate (4), the middle and inner supporting arch reinforcing plate (7) and the inner supporting arch reinforcing plate (10) are made of low yield point steel plates determined according to design requirements.
4. The tunnel roof deformation-resistant shock-absorbing protection structure as claimed in claim 1, wherein: the outer convex waveband arch supporting joint plate (2) is tangent to the inner surface of an outer support fixed connection top plate (23), and the inner concave waveband concave supporting joint plate (12) is tangent to the outer surface of an inner support fixed connection bottom plate (22).
5. The tunnel roof deformation-resistant shock-absorbing protection structure as claimed in claim 1, wherein: the concave supporting joint plates (3) of the outer concave wave band are tangent to the arched supporting joint plates (5) of the middle and outer convex wave bands, the concave supporting joint plates (6) of the middle and outer concave wave bands are tangent to the arched supporting joint plates (8) of the middle and inner convex wave bands, and the concave supporting joint plates (9) of the middle and inner concave wave bands are tangent to the arched supporting joint plates (11) of the inner convex wave bands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021486064.4U CN212803246U (en) | 2020-07-24 | 2020-07-24 | Anti-deformation shock-absorbing protection structure for tunnel top |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021486064.4U CN212803246U (en) | 2020-07-24 | 2020-07-24 | Anti-deformation shock-absorbing protection structure for tunnel top |
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| Publication Number | Publication Date |
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| CN212803246U true CN212803246U (en) | 2021-03-26 |
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| CN202021486064.4U Expired - Fee Related CN212803246U (en) | 2020-07-24 | 2020-07-24 | Anti-deformation shock-absorbing protection structure for tunnel top |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734441A (en) * | 2020-07-24 | 2020-10-02 | 沈阳促晋科技有限公司 | Anti-deformation shock-absorbing protection structure for tunnel top |
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2020
- 2020-07-24 CN CN202021486064.4U patent/CN212803246U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734441A (en) * | 2020-07-24 | 2020-10-02 | 沈阳促晋科技有限公司 | Anti-deformation shock-absorbing protection structure for tunnel top |
| CN111734441B (en) * | 2020-07-24 | 2024-06-21 | 张延年 | Tunnel top anti-deformation shock-absorbing protection structure |
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