CN111764930A - Tunnel supporting structure with honeycomb energy absorption device and construction method thereof - Google Patents
Tunnel supporting structure with honeycomb energy absorption device and construction method thereof Download PDFInfo
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- CN111764930A CN111764930A CN202010506029.2A CN202010506029A CN111764930A CN 111764930 A CN111764930 A CN 111764930A CN 202010506029 A CN202010506029 A CN 202010506029A CN 111764930 A CN111764930 A CN 111764930A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Abstract
The invention discloses a tunnel supporting structure with a honeycomb energy absorption device, which comprises a primary steel arch frame, a primary sprayed concrete layer and a secondary lining layer, wherein the primary steel arch frame is mainly formed by combining multiple sections of H-shaped steel, the honeycomb energy absorption device is arranged at the joint of the H-shaped steel combination, and the primary steel arch frame and the honeycomb energy absorption device are arranged in the primary sprayed concrete layer. The invention further provides a construction method of the tunnel supporting structure with the honeycomb energy absorption device. The honeycomb energy absorption device is preset in the tunnel supporting structure, the honeycomb energy absorption device releases surrounding rock energy through compression deformation, the problem that the primary support of the large deformation tunnel is easy to deform and damage can be effectively solved, and the structure of the honeycomb energy absorption device has certain strength and can maintain stability during installation. The adoption of the honeycomb energy absorption device can avoid multiple arch changes, accelerate the construction progress and improve the construction safety.
Description
Technical Field
The invention belongs to the field of tunnel engineering, and particularly relates to a tunnel supporting structure and a construction method thereof.
Background
In recent years, infrastructure construction in China is vigorously developed, scale of tunnel construction is unprecedented, and a tunnel is inevitably required to be constructed in an environment with extremely poor stratum conditions. When the tunnel passes through high ground stress or weak and broken strata, the surrounding rocks of the cavern are easy to deform greatly, so that the primary support steel frame is distorted and deformed, concrete is crushed and falls off, and the tunnel collapse is induced in severe cases. If the high ground stress is not properly released, the secondary lining is easy to crack and deform in the later period.
In the past, a 'strong support' principle is adopted during the design and construction of a large-deformation tunnel, common measures comprise increasing the thickness of a concrete layer, setting a double-layer primary support and the like, but the problem of large deformation cannot be effectively solved under most conditions, surrounding rocks are seriously deformed during construction, arch replacement is needed for many times, the construction progress is seriously influenced, and the construction safety is harmed.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings in the background technology, and provide a tunnel supporting structure with a honeycomb energy absorption device and a construction method thereof, wherein the tunnel supporting structure is good in stability and simple in structure, and is particularly suitable for large-deformation tunnel construction. In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the utility model provides a take tunnel supporting construction of honeycomb energy-absorbing device, includes just prop up the steel bow member, just prop up shotcrete layer and secondary lining layer, just prop up the steel bow member and mainly form by the combination of multistage H shaped steel, the joint department of H shaped steel combination is equipped with honeycomb energy-absorbing device, just prop up steel bow member and honeycomb energy-absorbing device and locate just prop up in the shotcrete layer. Generally, a plurality of honeycomb energy absorption devices are arranged in a primary steel arch.
In the tunnel supporting structure with the honeycomb energy absorption device, preferably, the honeycomb energy absorption device comprises connectors (plate-shaped) and a honeycomb energy absorption layer, the honeycomb energy absorption layer is clamped between the connectors, and the H-shaped steel is connected with the honeycomb energy absorption device through the connectors. Each honeycomb energy-absorbing device is provided with two connectors which are respectively used for being connected with the upper H-shaped steel and the lower H-shaped steel of the honeycomb energy-absorbing device.
In the tunnel supporting structure with the honeycomb energy absorption device, preferably, the connector is provided with a preset bolt, the end head of the H-shaped steel is provided with a connecting plate, and the connecting plate is provided with a bolt hole matched with the preset bolt. The pre-heightening bolt penetrates through the bolt hole and then fixes the connecting plate and the connector through the nut so as to fix the honeycomb energy absorption device and the H-shaped steel.
In the tunnel supporting structure with the honeycomb energy absorption device, preferably, the honeycomb energy absorption layer includes a plurality of honeycomb cells, the honeycomb cells are of a hollow structure, the cross sections of the honeycomb cells are regular hexagons, and the openings of the honeycomb cells face the center of the tunnel. The honeycomb cells have excellent geometric and mechanical properties, and the openings are oriented to facilitate subsequent injection of concrete into the honeycomb cells.
In the tunnel supporting structure with the honeycomb energy absorption device, preferably, the minimum total thickness of the honeycomb energy absorption device is n × h, and h is calculated by the following formula:
wherein n is the number of the honeycomb energy absorption devices, h is the thickness of a single honeycomb energy absorption device, t is the wall thickness of a honeycomb cell, a is the length of the honeycomb cell, and s is an early-stage observation or prediction tunnel clearance convergence value. The number and the thickness of the honeycomb energy absorption devices required to be adopted in the tunnel supporting structure can be determined through the calculation method, and the honeycomb energy absorption devices can be guaranteed to meet the requirement of compression deformation.
In the tunnel supporting structure with the honeycomb energy absorption device, preferably, the length L of the honeycomb energy absorption device is equal to the distance k between two adjacent preliminary supporting steel arches, and the honeycomb energy absorption devices at the same height of the two adjacent preliminary supporting steel arches are connected with each other. The setting can strengthen the integrity of the primary steel arch frame, has certain self-stability capability before the sprayed concrete is applied, and simultaneously ensures that the honeycomb energy absorption device runs through the primary support structure of the tunnel to strengthen the action effect.
In the tunnel supporting structure with the honeycomb energy absorption device, preferably, the width b of the honeycomb energy absorption device is equal to the thickness of the primary sprayed concrete layer. The setting can make the whole thickness of the primary support structure consistent, guarantee the smoothness of the primary support surface after the construction is finished, and eliminate the potential quality hazard of secondary backing post-void caused by uneven sprayed concrete surface.
In the tunnel supporting structure with the honeycomb energy absorption device, preferably, the tunnel supporting structure comprises a waterproof layer and a foot locking anchor rod, the waterproof layer is located at the bottom layer of the primary sprayed concrete layer, and the foot locking anchor rod is connected with the primary steel arch.
As a general technical concept, the present invention also provides a construction method of a tunnel supporting structure with a honeycomb energy absorbing device, comprising the steps of:
s1: excavating a tunnel by adopting a multi-step method of reserving core soil, constructing a waterproof layer after the excavation of the annular part at the top is finished, then erecting a primary steel arch and a locking anchor rod, synchronously installing a honeycomb energy absorption device when erecting the primary steel arch, and then spraying a primary sprayed concrete layer;
s2: continuing downward excavation and construction according to the construction method of S1 to finish the construction of the primary steel arch frame and the primary shotcrete layer of the next step;
s3: repeating S2 until all the primary steel arch frames and the primary sprayed concrete layer are constructed, and then completing the construction of the inverted arch part;
s4: the honeycomb energy absorption device is extruded and deformed under the stress action of surrounding rocks, and secondary lining layer construction is carried out after the honeycomb energy absorption device is deformed stably, namely the construction of a tunnel supporting structure is completed.
In the construction method, preferably, when the primary sprayed concrete layer is sprayed, the rubber sealing layer is detachably arranged at the opening of the honeycomb cell element of the honeycomb energy absorption device, the rubber sealing layer is removed after the honeycomb energy absorption device is deformed and stabilized, the honeycomb cell element is filled with the sprayed concrete, and then secondary lining layer construction is performed. The rubber sealing layer prevents the primary sprayed concrete layer from entering the honeycomb cell before deformation stabilization so as to influence the compression deformation of the honeycomb energy absorption device. When the deformation is stable, the rubber sealing layer is removed, and then concrete is sprayed into the honeycomb cell element, so that the structure of the honeycomb energy absorption device is more stable, and the overall stability of the whole tunnel supporting structure is higher.
Compared with the prior art, the invention has the advantages that:
1. the honeycomb energy absorption device is preset in the tunnel supporting structure, the honeycomb energy absorption device releases surrounding rock energy through compression deformation, the problem that the primary support of the large deformation tunnel is easy to deform and damage can be effectively solved, and the structure of the honeycomb energy absorption device has certain strength and can maintain stability during installation. The adoption of the honeycomb energy absorption device can avoid multiple arch changes, accelerate the construction progress and improve the construction safety.
2. The honeycomb energy absorption device is a part of a tunnel structure, and not only utilizes the deformation energy absorption characteristic of the honeycomb device, but also utilizes the porous characteristic of the honeycomb structure after the primary support deformation is basically stable, and concrete is sprayed in a honeycomb cavity, so that the structure is completely stable, and a secondary lining layer is prevented from being subjected to a large load.
3. The honeycomb energy absorption device is a prefabricated part, is simple to manufacture and is convenient to install on site.
4. The construction method is simple, has high matching degree with the existing method, can be used universally by equipment and instruments in the construction process, does not need to add other equipment, and has low construction cost.
5. According to the invention, the surrounding rock pressure is released through compression deformation of the honeycomb energy absorption device, the pressure applied to the tunnel structure is reduced after the tunnel surrounding rock energy is released, the support parameters do not need to be greatly enhanced, and the economical efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a tunnel supporting structure of the present invention.
FIG. 2 is a schematic structural view of the honeycomb energy absorbing device of the present invention.
FIG. 3 is a schematic view of a connection structure between the honeycomb energy absorbing device and H-shaped steel.
Fig. 4 is a schematic structural view of fig. 3 after the primary shotcrete layer is sprayed (the rubber sealing layer is not shown).
Fig. 5 is a schematic size diagram of the honeycomb energy absorption layer of the present invention.
FIG. 6 is a schematic view of the construction method in example 1.
FIG. 7 is a schematic view of the construction method in example 2.
Illustration of the drawings:
1. primarily supporting a steel arch frame; 11. h-shaped steel; 12. a connecting plate; 2. primary shotcrete layer; 3. secondary lining layer; 4. a honeycomb energy absorbing device; 41. a connector; 42. a honeycomb energy absorbing layer; 43. presetting a bolt; 5. a waterproof layer; 6. locking the anchor rod; 7. and a rubber sealing layer.
Detailed Description
In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Example 1:
as shown in fig. 1 to 5, the tunnel supporting structure with the honeycomb energy absorbing device of the present embodiment includes a primary steel arch 1, a primary sprayed concrete layer 2, and a secondary lining layer 3, where the primary steel arch 1 is mainly formed by combining multiple sections of H-shaped steel 11, a honeycomb energy absorbing device 4 is disposed at a joint of the H-shaped steel 11, and the primary steel arch 1 and the honeycomb energy absorbing device 4 are disposed in the primary sprayed concrete layer 2.
In this embodiment, the honeycomb energy absorption device 4 includes connectors 41 and a honeycomb energy absorption layer 42, the honeycomb energy absorption layer 42 is sandwiched between the connectors 41, and the H-shaped steel 11 is connected to the honeycomb energy absorption device 4 through the connectors 41.
In this embodiment, the connector 41 is provided with a preset bolt 43, the end portion of the H-shaped steel 11 is provided with a connecting plate 12, and the connecting plate 12 is provided with a bolt hole for matching with the preset bolt 43. The preset bolt 43 is fixed by a nut after passing through the bolt hole.
In this embodiment, the honeycomb energy absorption layer 42 includes a plurality of honeycomb cells, the honeycomb cells are hollow structures, the cross sections of the honeycomb cells are regular hexagons, and the openings of the honeycomb cells face the center of the tunnel.
In this embodiment, the length L of the honeycomb energy absorption device 4 is equal to the distance k between two adjacent primary steel arches 1, and the honeycomb energy absorption devices 4 at the same height of the two adjacent primary steel arches 1 are connected with each other.
In this embodiment, the width b of the honeycomb energy absorbing device 4 is equal to the thickness of the primary shotcrete layer 2.
In this embodiment, the tunnel supporting structure includes a waterproof layer 5 and a foot-locking anchor rod 6, the waterproof layer 5 is located at the bottom of the primary sprayed concrete layer 2, and the foot-locking anchor rod 6 is connected with the primary steel arch 1.
As shown in fig. 6, this embodiment further provides a construction method of a tunnel supporting structure with a honeycomb energy absorbing device, including the following steps:
s1: excavating a tunnel by adopting a mode of reserving core soil on two steps, and arranging 6 honeycomb energy absorption devices 4 in total, wherein 4 honeycomb energy absorption devices are arranged between 1H-shaped steel 11 of an upper-step primary support steel arch and 2 honeycomb energy absorption devices are arranged between the upper-step primary support steel arch 1 and a lower-step primary support steel arch 1;
s2: after the annular part of the upper step is excavated, a waterproof layer 5 is constructed, then a primary steel arch 1 and a foot locking anchor rod 6 are erected, a honeycomb energy absorption device 4 is synchronously installed when the primary steel arch 1 is erected, and a primary sprayed concrete layer 2 is sprayed; when the primary sprayed concrete layer 2 is sprayed, a rubber sealing layer 7 is arranged at the opening of the honeycomb cell element of the honeycomb energy absorption device 4;
s3: excavating a reserved core soil part;
s4: after the lower step is excavated, constructing other primary steel arch frames 1 and primary sprayed concrete layers 2 according to the method of S2;
s5: completing the construction of an inverted arch part;
s6: and (3) extruding and deforming the honeycomb energy absorption device 4 under the action of surrounding rock stress, removing the rubber sealing layer 7 after the honeycomb energy absorption device 4 deforms stably, filling the honeycomb cell with sprayed concrete, and constructing the secondary lining layer 3 to complete the construction of the tunnel supporting structure.
In this embodiment, the minimum thickness H of the honeycomb energy absorbing device 4 between 1 and 11H-shaped steel beams of a single upper-step primary support steel arch1Calculated from the following formula:
minimum thickness h of honeycomb energy absorption device 4 between single upper step primary support steel arch 1 and lower step primary support steel arch 12Calculated from the following formula:
where t is the wall thickness of the cellular cell, a is the length of the cellular cell, and s is the observed or predicted convergence of tunnel headroom in the early stage.
The total thickness of the honeycomb energy-absorbing device 4 is set by considering the distribution characteristics of the compression deformation and the axial force of the tunnel structure, the total thickness can meet the requirement of the compression deformation, the axial force of the tunnel structure is distributed by considering the characteristics of larger axial force at the position close to the arch springing and smaller axial force at the position of the arch crown, and the thickness of the honeycomb energy-absorbing device 4 close to the arch springing is twice of that of other parts by considering the characteristics.
Example 2:
the tunnel supporting structure with the honeycomb energy absorbing device of the embodiment is similar to the tunnel supporting structure of the embodiment 1.
As shown in fig. 7, the construction method of the tunnel supporting structure with the honeycomb energy absorbing device of the embodiment includes the following steps:
s1: excavating a tunnel by adopting a three-step method for reserving core soil, and arranging 6 honeycomb energy absorption devices 4 in total, wherein 2 honeycomb energy absorption devices are positioned between 1H-shaped steel 11 of an upper-step primary steel arch, 2 honeycomb energy absorption devices are positioned between 1 upper-step primary steel arch and 1 middle-step primary steel arch, and 2 honeycomb energy absorption devices are positioned between 1 middle-step primary steel arch and 1 lower-step primary steel arch;
s2: after the annular part of the upper step is excavated, a waterproof layer 5 is constructed, then a primary steel arch 1 and a foot locking anchor rod 6 are erected, a honeycomb energy absorption device 4 is synchronously installed when the primary steel arch 1 is erected, and a primary sprayed concrete layer 2 is sprayed; when the primary sprayed concrete layer 2 is sprayed, a rubber sealing layer 7 is arranged at the opening of the honeycomb cell element of the honeycomb energy absorption device 4;
s3: after the left side and the right side of the middle step part are excavated, constructing a primary steel arch frame 1 and a primary sprayed concrete layer 2 according to the method of S2;
s4: excavating an upper step to reserve a core soil part;
s5: after the left side and the right side of the lower step part are excavated, constructing a primary steel arch frame 1 and a primary sprayed concrete layer 2 according to the method of S2;
s6: excavating a reserved core soil part of the middle step;
s7: excavating a lower step to reserve a core soil part, and completing construction of an inverted arch part;
s8: and (3) extruding and deforming the honeycomb energy absorption device 4 under the action of surrounding rock stress, removing the rubber sealing layer 7 after the honeycomb energy absorption device 4 deforms stably, filling the honeycomb cell with sprayed concrete, and constructing the secondary lining layer 3 to complete the construction of the tunnel supporting structure.
In this embodiment, the minimum thickness H of the honeycomb energy absorbing device 4 between 1 and 11H-shaped steel beams of a single upper-step primary support steel arch1Calculated from the following formula:
single upper step primary support steel arch 1 and middle step primary support steel arch 1Minimum thickness h of honeycomb energy absorption device 42Calculated from the following formula:
minimum thickness h of honeycomb energy absorption device 4 between single middle-step primary support steel arch 1 and lower-step primary support steel arch 13Calculated from the following formula:
where t is the wall thickness of the cellular cell, a is the length of the cellular cell, and s is the observed or predicted convergence of tunnel headroom in the early stage.
Claims (10)
1. The utility model provides a take tunnel supporting construction of honeycomb energy-absorbing device, includes first steel bow member (1), first shotcrete layer (2) and secondary lining layer (3), its characterized in that, first steel bow member (1) mainly forms by multistage H shaped steel (11) combination, the joint department of H shaped steel (11) combination is equipped with honeycomb energy-absorbing device (4), first steel bow member (1) and honeycomb energy-absorbing device (4) are located in first shotcrete layer (2).
2. The tunnel supporting structure with the honeycomb energy absorbing device according to claim 1, wherein the honeycomb energy absorbing device (4) comprises connectors (41) and honeycomb energy absorbing layers (42), the honeycomb energy absorbing layers (42) are clamped between the connectors (41), and the H-shaped steel (11) is connected with the honeycomb energy absorbing device (4) through the connectors (41).
3. The tunnel supporting structure with the honeycomb energy absorbing device is characterized in that a preset bolt (43) is arranged on the connector (41), a connecting plate (12) is arranged at the end head of the H-shaped steel (11), and a bolt hole matched with the preset bolt (43) is formed in the connecting plate (12).
4. The tunnel supporting structure with the honeycomb energy absorbing device according to claim 2, wherein the honeycomb energy absorbing layer (42) comprises a plurality of honeycomb cells, the honeycomb cells are hollow structures, the cross sections of the honeycomb cells are regular hexagons, and the openings of the honeycomb cells face the center of the tunnel.
5. The tunnel supporting structure with a honeycomb energy absorbing device according to claim 4, characterized in that the minimum total thickness of the honeycomb energy absorbing device (4) is nxh, h is calculated by the following formula:
wherein n is the number of the honeycomb energy absorption devices (4), h is the thickness of a single honeycomb energy absorption device (4), t is the wall thickness of a honeycomb cell, a is the length of the honeycomb cell, and s is an early-stage observation or prediction tunnel clearance convergence value.
6. The tunnel supporting structure with the honeycomb energy absorbing device according to any one of claims 1 to 5, wherein the length L of the honeycomb energy absorbing device (4) is equal to the distance k between two adjacent primary steel arches (1), and the honeycomb energy absorbing devices (4) at the same height of the two adjacent primary steel arches (1) are connected with each other.
7. The tunnel supporting structure with honeycomb energy absorbing device according to any one of claims 1-5, characterized in that the width b of the honeycomb energy absorbing device (4) is equal to the thickness of the primary shotcrete layer (2).
8. The tunnel supporting structure with the honeycomb energy absorbing device according to any one of claims 1 to 5, characterized in that the tunnel supporting structure comprises a waterproof layer (5) and foot-locking anchor rods (6), the waterproof layer (5) is positioned at the bottom layer of the primary sprayed concrete layer (2), and the foot-locking anchor rods (6) are connected with the primary steel arch (1).
9. A construction method of a tunnel supporting structure with a honeycomb energy absorption device is characterized by comprising the following steps:
s1: excavating a tunnel by adopting a multi-step method of reserving core soil, constructing a waterproof layer (5) after the excavation of the annular part at the top is finished, then erecting a primary steel arch (1) and a foot locking anchor rod (6), synchronously installing a honeycomb energy absorption device (4) when erecting the primary steel arch (1), and then spraying a primary sprayed concrete layer (2);
s2: continuing downward excavation and construction according to the construction method of S1 to finish the construction of the primary steel arch frame (1) and the primary sprayed concrete layer (2) of the next step;
s3: repeating S2 until all the primary steel arch frames (1) and the primary sprayed concrete layer (2) are constructed, and then completing the construction of the inverted arch part;
s4: the honeycomb energy absorption device (4) is extruded and deformed under the stress action of surrounding rocks, and secondary lining layer (3) construction is carried out after the honeycomb energy absorption device (4) is deformed and stabilized, namely the construction of a tunnel supporting structure is completed.
10. The construction method according to claim 9, characterized in that when the primary sprayed concrete layer (2) is sprayed, rubber sealing layers (7) are arranged at the openings of the honeycomb cells of the honeycomb energy-absorbing device (4), the rubber sealing layers (7) are removed after the honeycomb energy-absorbing device (4) is deformed and stabilized, the honeycomb cells are filled with sprayed concrete, and then the construction of the secondary lining layer (3) is carried out.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562294A (en) * | 2022-03-29 | 2022-05-31 | 成都理工大学 | Tunnel lets pressure to strut restriction energy-absorbing controller that hinders |
| CN114645722A (en) * | 2022-03-31 | 2022-06-21 | 成都理工大学 | Combined type buffering energy-absorbing tunnel lets presses and struts system |
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2020
- 2020-06-05 CN CN202010506029.2A patent/CN111764930A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562294A (en) * | 2022-03-29 | 2022-05-31 | 成都理工大学 | Tunnel lets pressure to strut restriction energy-absorbing controller that hinders |
| CN114562294B (en) * | 2022-03-29 | 2023-03-10 | 成都理工大学 | Tunnel lets pressure to strut restriction energy-absorbing controller that hinders |
| CN114645722A (en) * | 2022-03-31 | 2022-06-21 | 成都理工大学 | Combined type buffering energy-absorbing tunnel lets presses and struts system |
| CN114645722B (en) * | 2022-03-31 | 2024-01-26 | 成都理工大学 | Combined type buffering energy-absorbing tunnel lets presses support system |
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