CN113356913A - Subway construction top strutting arrangement - Google Patents
Subway construction top strutting arrangement Download PDFInfo
- Publication number
- CN113356913A CN113356913A CN202110808379.9A CN202110808379A CN113356913A CN 113356913 A CN113356913 A CN 113356913A CN 202110808379 A CN202110808379 A CN 202110808379A CN 113356913 A CN113356913 A CN 113356913A
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- supporting
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- tunnel
- sliding
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 230000008093 supporting effect Effects 0.000 claims abstract description 99
- 230000007246 mechanism Effects 0.000 claims abstract description 63
- 230000005540 biological transmission Effects 0.000 claims description 32
- 230000003139 buffering effect Effects 0.000 claims description 14
- 230000003313 weakening effect Effects 0.000 claims description 9
- 238000013016 damping Methods 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 3
- 230000003993 interaction Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/049—Connecting devices between the head or foot of a prop and the cap or base of the roof support
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The embodiment of the invention discloses a top supporting device for subway construction, which relates to the technical field of subway construction and mainly aims to solve the problems that the existing top supporting device for subway construction is easy to collapse at multiple places and has short service life, and comprises a supporting mechanism, a linkage part and a buffer mechanism, wherein a plurality of supporting pieces are arranged in the supporting mechanism, the linkage part is positioned in the supporting mechanism, the linkage part in the supporting mechanism can convert the impact force generated by the collapse of a tunnel on the supporting piece into the supporting force of the other adjacent supporting piece for supporting the tunnel through the interaction of a rotating assembly and a first buffer assembly, so that the condition of multiple collapse can be prevented, the multidirectional rotation of a spherical piece in the buffer mechanism is matched with the damping action of the first buffer assembly, the swinging amplitude of the supporting mechanism and the tunnel is reduced, and the supporting mechanism and the tunnel are prevented from being damaged and collapsing due to violent shaking, thereby prolonging the service life of the tunnel and the supporting mechanism.
Description
Technical Field
The application relates to the technical field of subway construction, in particular to a subway construction top supporting device.
Background
Along with the continuous progress of society, urbanization construction is also faster and faster, in order to satisfy the convenience of people's trip and commute in the big city, and the development of big city subway is also faster and faster, in the work progress of city subway, in order to prevent that the subway tunnel from collapsing, often use strutting arrangement to support its top.
The existing subway construction top supporting device is simple in structure, when one side collapses or is sunken, the collapse of the other side cannot be effectively prevented, so that the subway tunnel is easy to cause, the collapse of multiple places occurs in the subway tunnel, when severe vibration is encountered, such as earthquake, the supporting device lacks effective buffering performance, and the service life of the supporting device and the tunnel cannot be reduced due to the damage of vibration to the subway tunnel.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a top supporting device for subway construction, so as to solve the problems mentioned in the background art.
In order to achieve the above purpose, the present application provides the following technical solutions:
the utility model provides a subway construction top strutting arrangement, includes supporting mechanism, be provided with a plurality of support piece in the supporting mechanism, still include:
the linkage component is positioned in the supporting mechanism and comprises a rotating component and a first buffering component which are connected between two adjacent supporting pieces, the rotating component is used for transmitting the pressure of the tunnel borne by the supporting pieces to the adjacent supporting pieces through the first buffering component and further converting the pressure into supporting force for supporting the tunnel, and the first buffering component is used for weakening the impact force of the tunnel collapse on the supporting pieces; and
the buffer mechanism comprises a spherical piece connected with the support mechanism; and the second buffer assembly is connected with the supporting mechanism, the spherical piece is used for driving the supporting mechanism to shake along with the tunnel, and the second buffer assembly is used for weakening the shaking amplitude of the supporting mechanism.
As a further aspect of the present application: the support mechanism further includes:
the base is connected with the buffer mechanism, and the spherical piece is connected with the base; and
a channel located on the base; and
the framework is located on the channel, an extensible part for driving the supporting part to move is arranged on the framework, and the extensible part is connected with the rotating assembly through the first linkage part.
As a still further aspect of the present application: the rotating assembly comprises an eccentric part, two ends of the eccentric part are respectively connected with the first linkage part and the first buffer assembly; and the fixing piece is connected with the channel, and the central position of the eccentric piece is connected with the fixing piece through a central shaft.
As a still further aspect of the present application: the first buffer assembly includes:
the second linkage piece is connected with one end of the eccentric piece, and a first sliding piece sliding along the surface of the channel is arranged on the second linkage piece; and
a third link connected to the adjacent support member, the third link being provided with a second slider that slides along the channel surface; and
the first transmission piece is positioned on the first sliding piece, and a pressure bearing piece used for bearing the pressure of the first sliding piece is arranged on the first transmission piece; and the first buffer piece is sleeved on the first transmission piece and used for weakening the impact force generated by the collapse of the tunnel on the support piece.
As a still further aspect of the present application: the buffer gear still includes and holds carrier, it is provided with the first portion of holding that is used for installing spherical piece to hold carrier, still is provided with the second portion of holding that is used for installing second buffering subassembly.
As a still further aspect of the present application: the second buffer assembly comprises a third sliding piece which is connected with the second accommodating part in a sliding manner; and the second transmission part is positioned on the third sliding part, one side, far away from the second transmission part, of the third sliding part is connected with the base through a fourth linkage part, one end, far away from the third sliding part, of the third sliding part is connected with a jacking part, and a second buffer part used for increasing the sliding resistance of the third sliding part is sleeved on the second transmission part.
As a still further aspect of the present application: the number of the second buffer components is a plurality, and the second buffer components are symmetrical about the center of the spherical part.
Compared with the prior art, the beneficial effects of this application are:
linkage parts in the supporting mechanism can turn into the supporting force that adjacent another support piece was used for supporting the tunnel because of the impact force that the tunnel collapses that support piece received through the interact of runner assembly and first buffering subassembly, can prevent the condition that many places collapse from appearing, the multidirectional damping action of the first buffering subassembly of normal running fit of spherical piece in the buffering mechanism, reduce the amplitude of oscillation of supporting mechanism and tunnel, thereby prevent that supporting mechanism and tunnel from damaging and collapsing because of acutely rocking, thereby the life of tunnel and supporting mechanism has been prolonged, the problem that current subway construction top strutting arrangement has many places collapse and low service life easily appears has been solved.
Drawings
Fig. 1 is a schematic structural view of a top support device for subway construction according to an embodiment of the present invention.
Fig. 2 is an enlarged view of a portion of a rotating assembly in an embodiment of the present invention.
FIG. 3 is an enlarged view of a portion of a first cushioning element according to an embodiment of the present invention.
FIG. 4 is an enlarged view of a second cushioning element according to an embodiment of the present invention.
FIG. 5 is a diagram illustrating a position distribution of a second damping member in the damping mechanism according to the embodiment of the present invention.
In the figure: 1-support mechanism, 11-base, 12-channel, 13-skeleton, 14-support, 15-telescopic element, 16-linkage element, 161-first linkage element, 162-rotation element, 1621-eccentric element, 1622-central shaft, 1623-fixed element, 163-first buffer element, 1631-second linkage element, 1632-first sliding element, 1633-third linkage element, 1634-second sliding element, 1635-bearing element, 1636-first transmission element, 1637-first buffer element, 2-buffer mechanism, 21-bearing element, 22-first accommodating part, 23-spherical element, 24-second accommodating part, 25-second buffer element, 251-third sliding element, 252-second transmission element, 253-top pressing element, 254-second cushion, 26-fourth link, 27-plunger.
Detailed Description
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application.
Referring to fig. 1, the present embodiment provides a top supporting device for subway construction, including a supporting mechanism 1, where a plurality of supporting members 14 are disposed in the supporting mechanism 1, and further including:
the linkage part 16 is positioned in the supporting mechanism 1, the linkage part 16 comprises a rotating component 162 and a first buffer component 163, the rotating component 162 is connected between two adjacent supporting pieces 14, the rotating component 162 is used for transmitting the pressure of the tunnel borne by the supporting pieces 14 to the adjacent supporting pieces 14 through the first buffer component 163 and further converting the pressure into the supporting force for supporting the tunnel, and the first buffer component 163 is used for weakening the impact force of the tunnel collapse on the supporting pieces 14; and
the buffer mechanism 2, the buffer mechanism 2 includes the spherical member 23 connected with supporting mechanism 1; and the second buffer assembly 25 is connected with the supporting mechanism 1, the spherical part 23 is used for driving the supporting mechanism 1 to shake along with the tunnel, and the second buffer assembly 25 is used for weakening the shaking amplitude of the supporting mechanism 1.
Referring to fig. 1, in the above-mentioned technical solution, the supporting element 14 is designed as a supporting plate or a supporting block, and the shape of the supporting plate or the supporting block can be designed as an arc or a rectangle, which is not limited herein and will not be described again, and the spherical element 23 is designed as a sphere.
Referring to fig. 1, as an embodiment of the present application, the supporting mechanism 1 further includes:
the base 11 is connected with the buffer mechanism 2, and the spherical piece 23 is connected with the base 11; and
a channel 12 located on the base 11; and
the framework 13 is positioned on the channel 12, the framework 13 is provided with an expansion piece 15 which drives the support piece 14 to move, and the expansion piece 15 is connected with the rotating assembly 162 through a first linkage piece 161.
Referring to fig. 1, in the above-mentioned technical solution, the extensible member 15 may be designed as an electric extensible rod or a hydraulic extensible rod, and is configured to drive the support member 14 to move and support the tunnel, the movable end of the extensible member 15 is connected to the support member 14, and the fixed end is embedded in the framework 13, so that under the action of pressure or impact force of the tunnel, the fixed end of the extensible member 15 can be driven to have a certain displacement on the framework 13, and the first linking member 161 is designed as a first connecting rod hinged to the fixed end of the extensible member 15, where the shape of the first connecting rod is not limited, and thus, the description is omitted.
Referring to fig. 2, as an embodiment of the present application, the rotating assembly 162 includes an eccentric member 1621 having two ends respectively connected to the first linking member 161 and the first buffering assembly 163; and a fixing member 1623 coupled to the passage 12, the eccentric member 1621 being coupled to the fixing member 162 at a central position thereof through a central shaft 1622.
Referring to fig. 2, in the above-mentioned technical solution, the eccentric member 1621 is designed as a cam rotating around a central shaft 1622, one of two ends of the cam is hinged to the first linking member 161, the fixing member 162 is designed as a fixed frame, and the central shaft 162 is installed on the fixed frame.
Of course, the eccentric member 1621 may also be designed as two groups of eccentric wheels arranged in parallel, and the two groups of eccentric wheels have the same size, and both the two groups of eccentric wheels perform eccentric rotation motion around the center line of the central shaft 162, the position on the eccentric wheel far away from the central shaft 162 is hinged to the first linkage member 161, and the other group of eccentric wheels is connected to the first buffer assembly 163, where the eccentric member 1621 is a conventional technical means in the prior art, and thus, it is not described again.
Referring to fig. 3, as an embodiment of the present application, the first buffer element 163 includes:
a second link 1631 connected to one end of the eccentric 1621, wherein the second link 1631 is provided with a first slider 1632 sliding along the surface of the channel 12; and
a third link 1633 connected to the adjacent support 14, wherein the third link 1633 is provided with a second slide 1634 sliding along the surface of the channel 12; and
a first transmission piece 1636 positioned on the first sliding piece 163, wherein the first transmission piece 1636 is provided with a pressure bearing piece 1635 for bearing the pressure of the first sliding piece 163; and a first buffer 1637 sleeved on the first transmission piece 1636 for weakening the impact force generated by the collapse of the tunnel on the supporting piece 14.
Referring to fig. 3, in the above-mentioned technical solution, the second linkage 1631 is designed as a second connecting rod, the second connecting rod is hinged to the other end of the cam or another set of eccentric wheels, the first sliding member 1632 is designed as a first sliding block hinged to the other end of the second connecting rod, the third linkage 1633 is designed as a third connecting rod hinged to the adjacent supporting member 14, the second sliding member 1634 is designed as a second sliding block hinged to the other end of the third connecting rod, the first transmission member 1636 is designed as a transmission rod or a transmission shaft, the bearing member 1635 is designed as a fixing plate or a fixing block, the first buffer member 1637 is designed as a first spring or a first rubber sleeve, when the two adjacent supporting members 14 collapse at the area on the tunnel, the two supporting members 14 drive the first sliding block and the second sliding block to slide relatively along the surface of the channel 12 through the second connecting rod and the third connecting rod respectively, the second slider can drive fixed plate or fixed block and slide together through transfer line or transmission shaft when sliding, and the elastic deformation of first spring or first rubber sleeve can absorb the kinetic energy that the second slider slided and produce at this in-process, and when first slider and fixed plate or fixed block contacted, the interaction between the two can offset its impact that receives respectively again to turn into respective reverse holding power, possess the good and good characteristics of supporting effect of stability.
Of course, the first transmission member 1636 may also be installed on the second sliding member 1634, and a pressure-bearing member 1635 for bearing pressure is installed at a position, close to the first sliding member 1632, of the end of the first transmission member 1636, and the effect is consistent with the above, and both can play a role in improving stability and supporting effect, and here, the connection between the first transmission member 1636 and the pressure-bearing member 1635 and the second sliding member 163 or the connection between the first sliding member 1632 is not limited, and thus, description thereof is omitted.
Referring to fig. 1, as an embodiment of the present application, the damping mechanism 2 further includes a carrier 21, and the carrier 21 is provided with a first accommodating portion 22 for installing a ball 23 and a second accommodating portion 24 for installing a second damping assembly 25.
Referring to fig. 1, in the above-mentioned technical solution, the bearing member 21 is designed as a fixed seat or a fixed platform, the weight of the tunnel and the support mechanism 1 is totally concentrated on the bearing member 21, in order to prevent the bearing member 21 from sliding, a plurality of insertion rods 27 capable of being inserted into the ground are arranged at the bottom of the bearing member 21, the first accommodating portion 22 is designed as a spherical groove formed on the bearing member 21, the spherical member 23 is capable of rotating in multiple directions in the spherical groove, and the second accommodating portion 24 is designed as a sliding groove or a sliding rail formed on the surface of the bearing member 21.
Referring to fig. 4, as an embodiment of the present application, the second buffering assembly 25 includes a third sliding member 251 slidably connected to the second accommodating portion 24; and a second transmission member 252 located on the third sliding member 251, wherein one side of the third sliding member 251, which is far away from the second transmission member 252, is connected to the base 11 through a fourth linkage member 26, one end of the third sliding member 251, which is far away from the third sliding member 251, is connected to a pressing member 253, and a second buffer member 254 for increasing the sliding resistance of the third sliding member 251 is sleeved on the second transmission member 252.
Referring to fig. 4, in the above-mentioned technical solution, the third sliding member 251 is designed as a third sliding block sliding in a sliding slot or a sliding block, the second transmission member 252 is designed as a transmission rod or a transmission shaft installed at one end of the third sliding block, the fourth linkage member 26 is designed as a fourth connecting rod hinged between the other end of the third sliding block and the base 11, the pressing member 253 is designed as a fixing plate attached to the side wall of the tunnel, the second buffer member 254 is designed as a second spring or a second elastic rubber, when the base 1 swings around the spherical slot through the spherical member 23, the third sliding block can be driven by the fourth connecting rod to slide in the sliding slot or the sliding block, and further the fixing plate is driven by the transmission rod or the transmission shaft to press against the side wall of the tunnel, so as to support the side wall of the tunnel, and the elastic deformation of the second spring or the second elastic rubber can increase the resistance of the third sliding block when sliding and absorb the mechanical energy generated by the swinging, the damping device has the advantages that the damping effect is achieved, the swing amplitude of the supporting mechanism 1 and the tunnel can be reduced, the supporting mechanism 1 and the tunnel are prevented from being damaged and collapsed due to severe shaking, and the service lives of the tunnel and the supporting mechanism are prolonged.
Referring to fig. 5, further, the number of the second buffer assemblies 25 is several, and the several second buffer assemblies 25 are symmetrical with respect to the center of the spherical member 23.
When the tunnel in one area where one of the supporting members 14 is located collapses, an inward impact force is generated, the supporting members 14 can be driven to move inward at a certain distance, and then the rotating member 162 is driven to rotate at a certain angle and simultaneously drive the first buffer member 163 to move, and during the movement of the first buffer member 163, on one hand, the impact force from the tunnel on the supporting members 14 can be weakened, and on the other hand, the impact force can be converted into a driving force for driving the adjacent supporting members 14 to approach the tunnel, so that the adjacent tunnel area can be supported, and multiple collapse situations can be prevented; when meeting the violent shaking that earthquake or other factors lead to, supporting mechanism 1 can follow the tunnel and rock together through spherical piece 23 in buffer gear 2, and first buffer component 163 can play the damped effect, can reduce the amplitude of fluctuation of supporting mechanism 1 and tunnel, thereby prevent that supporting mechanism 1 and tunnel from damaging and collapsing because of violent shaking, thereby prolonged tunnel and supporting mechanism's life, solved current subway construction top strutting arrangement and had the problem that many places collapse and life are low easily appear.
In conclusion, the linkage part 16 in the supporting mechanism 1 can convert the impact force, which is caused by the collapse of the tunnel, of the supporting member 14 into the supporting force, which is used for supporting the tunnel, of the other adjacent supporting member 14 through the interaction between the rotating assembly 162 and the first buffer assembly 163, so that the situation of multiple collapse can be prevented, the multidirectional rotation of the spherical member 23 in the buffer mechanism 2 is matched with the damping effect of the first buffer assembly 16, the swing amplitude of the supporting mechanism 1 and the tunnel is reduced, the supporting mechanism 1 and the tunnel are prevented from being damaged and collapsed due to violent shaking, the service lives of the tunnel and the supporting mechanism are prolonged, and the problems that the multiple collapse is easy to occur and the service life is short in the existing top supporting device for subway construction are solved.
It should be noted that, although the present specification describes embodiments, each embodiment does not include only a single technical solution, and such description of the specification is only for clarity, and those skilled in the art should take the specification as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art, and the above-mentioned embodiments only express the preferred embodiments of the technical solutions, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the claims of the technical solutions. It should be noted that, for those skilled in the art, without departing from the concept of the present application, several modifications, improvements and substitutions can be made, which are all within the protection scope of the present technical solution.
Claims (7)
1. The utility model provides a subway construction top strutting arrangement, includes supporting mechanism, be provided with a plurality of support piece in the supporting mechanism, its characterized in that still includes:
the linkage component is positioned in the supporting mechanism and comprises a rotating component and a first buffering component which are connected between two adjacent supporting pieces, the rotating component is used for transmitting the pressure of the tunnel borne by the supporting pieces to the adjacent supporting pieces through the first buffering component and further converting the pressure into supporting force for supporting the tunnel, and the first buffering component is used for weakening the impact force of the tunnel collapse on the supporting pieces; and
the buffer mechanism comprises a spherical piece connected with the support mechanism; and the second buffer assembly is connected with the supporting mechanism, the spherical piece is used for driving the supporting mechanism to shake along with the tunnel, and the second buffer assembly is used for weakening the shaking amplitude of the supporting mechanism.
2. The roof support apparatus for subway construction as claimed in claim 1, wherein said supporting mechanism further comprises:
the base is connected with the buffer mechanism, and the spherical piece is connected with the base; and
a channel located on the base; and
the framework is located on the channel, an extensible part for driving the supporting part to move is arranged on the framework, and the extensible part is connected with the rotating assembly through the first linkage part.
3. The top support device for subway construction as claimed in claim 1, wherein said rotation assembly comprises an eccentric member having both ends connected to the first link member and the first buffering assembly, respectively; and the fixing piece is connected with the channel, and the central position of the eccentric piece is connected with the fixing piece through a central shaft.
4. The subway construction roof support apparatus of claim 3, wherein said first buffer assembly comprises:
the second linkage piece is connected with one end of the eccentric piece, and a first sliding piece sliding along the surface of the channel is arranged on the second linkage piece; and
a third link connected to the adjacent support member, the third link being provided with a second slider that slides along the channel surface; and
the first transmission piece is positioned on the first sliding piece, and a pressure bearing piece used for bearing the pressure of the first sliding piece is arranged on the first transmission piece; and the first buffer piece is sleeved on the first transmission piece and used for weakening the impact force generated by the collapse of the tunnel on the support piece.
5. The top support device for subway construction as claimed in claim 1, wherein said buffer mechanism further comprises a bearing member, said bearing member being provided with a first receiving portion for mounting said spherical member and a second receiving portion for mounting said second buffer assembly.
6. The subway construction roof support apparatus as claimed in claim 2, wherein said second buffer assembly comprises a third slider slidably connected to said second receiving portion; and the second transmission part is positioned on the third sliding part, one side, far away from the second transmission part, of the third sliding part is connected with the base through a fourth linkage part, one end, far away from the third sliding part, of the third sliding part is connected with a jacking part, and a second buffer part used for increasing the sliding resistance of the third sliding part is sleeved on the second transmission part.
7. The top support device for subway construction as claimed in claim 1, wherein said number of said second buffer members is several, and said several second buffer members are centrally symmetrical with respect to said spherical member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110808379.9A CN113356913A (en) | 2021-07-16 | 2021-07-16 | Subway construction top strutting arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110808379.9A CN113356913A (en) | 2021-07-16 | 2021-07-16 | Subway construction top strutting arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113356913A true CN113356913A (en) | 2021-09-07 |
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ID=77539917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110808379.9A Withdrawn CN113356913A (en) | 2021-07-16 | 2021-07-16 | Subway construction top strutting arrangement |
Country Status (1)
| Country | Link |
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| CN (1) | CN113356913A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484209A (en) * | 2021-11-04 | 2022-05-13 | 昆明学院 | Ecological display device for hydraulic engineering |
-
2021
- 2021-07-16 CN CN202110808379.9A patent/CN113356913A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484209A (en) * | 2021-11-04 | 2022-05-13 | 昆明学院 | Ecological display device for hydraulic engineering |
| CN114484209B (en) * | 2021-11-04 | 2023-07-25 | 昆明学院 | Ecological display device for hydraulic engineering |
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Application publication date: 20210907 |