CN112240012A - Anticollision highway guardrail - Google Patents
Anticollision highway guardrail Download PDFInfo
- Publication number
- CN112240012A CN112240012A CN202011196213.8A CN202011196213A CN112240012A CN 112240012 A CN112240012 A CN 112240012A CN 202011196213 A CN202011196213 A CN 202011196213A CN 112240012 A CN112240012 A CN 112240012A
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- Prior art keywords
- rectangular
- plate
- guardrail plate
- guardrail
- breast board
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention discloses an anti-collision highway guardrail which comprises a stand column, wherein the stand column is fixedly connected with a guardrail plate through a connecting piece, the guardrail plate comprises a front guardrail plate and a rear guardrail plate, the number of the connecting pieces is two, the connecting piece comprises a connecting cylinder and a connecting ring, one end of the connecting cylinder is fixedly connected with the stand column, an annular bulge is arranged on the outer circumferential surface of the other end of the connecting cylinder, an annular baffle is arranged on the inner circumferential surface of one end of the connecting ring, the inner side surface of the annular baffle is attached to the side surface, close to the stand column, of the annular bulge, a connecting plate is arranged at the other end of the connecting ring, a buffer is filled in a cavity of the connecting ring, the two connecting plates are respectively and fixedly connected with the middle position of two arc parts of the rear guardrail. The invention solves the technical problem that the existing highway guardrail has limited capacity of absorbing energy when collision occurs.
Description
Technical Field
The invention relates to the technical field of highway guardrails, in particular to an anti-collision highway guardrail.
Background
With the mass construction of highways and the great increase in the automobile holding capacity, the incidence of traffic accidents on highways also tends to increase. At present, protective devices on two sides of a highway mainly comprise an upright post and a breast board positioned on the upright post, the upright post and the breast board are made of rigid materials, an automobile can only damage and absorb energy by means of deformation of the breast board when colliding with the breast board, and the deformation capacity of the breast board is limited. In summary, how to solve the problem that the existing expressway guardrail has limited capacity of absorbing energy becomes a problem to be urgently solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the anti-collision highway guardrail, wherein double buffering is realized between two arc-shaped parts of a rear breast board and a stand column through a buffer and a pressure spring; the elastic deformation capacity of the breast board is enhanced by adopting the front breast board and the rear breast board which are opposite; the front breast board and the rear breast board are connected through the rectangular strips and the tension springs, the length of the front breast board is smaller than that of the rear breast board, so that when collision occurs, the front breast board can move horizontally relative to the rear breast board and can move vertically relative to the rear breast board, and good buffering is achieved.
In order to achieve the purpose, the invention adopts the technical scheme that:
an anti-collision highway guardrail comprises a stand column, wherein the stand column is fixedly connected with a guardrail plate through a connecting piece, the guardrail plate comprises a front guardrail plate and a rear guardrail plate, the middle part of the front guardrail plate is connected with the middle part of the rear guardrail plate, the upper end and the lower end of the front guardrail plate are respectively connected with the upper end and the lower end of the rear guardrail plate, two cavities are formed between the front guardrail plate and the rear guardrail plate, outward tension is preset on the upper side and the lower side of the front guardrail plate and the upper side and the lower side of the rear guardrail plate, first flanges are arranged at the top and the bottom of the front guardrail plate in the cavity, the end part of each first flange extends towards the direction close to the front guardrail plate, third flanges are arranged at the top and the bottom of the rear guardrail plate in the cavity, fourth flanges extend towards the direction close to the rear guardrail plate, the guardrail further comprises two rectangular strips, and a rectangular through hole is arranged on each rectangular strip along the length direction of the rectangular through hole, the end face of the rectangular strip is provided with a sliding groove along the length direction of the rectangular strip, the sliding groove penetrates through two opposite side faces of the rectangular strip, the sliding groove is communicated with the rectangular through hole, the two first flanges are respectively tightly attached to one side face of the two sliding grooves, the two third flanges are respectively tightly attached to the other side faces of the two sliding grooves, a plurality of tension springs are arranged between the two rectangular strips at intervals, the two second flanges are respectively tightly attached to the side face of the rectangular through hole, which is provided with the sliding groove, the two fourth flanges are respectively tightly attached to the side face of the rectangular through hole, which is provided with the sliding groove, and the length of the front breast board is smaller than that of;
the connecting piece is characterized in that the number of the connecting pieces is two, the connecting piece comprises a connecting cylinder and a connecting ring, one end of the connecting cylinder is fixedly connected with the stand column, an outer circumferential surface of the other end of the connecting cylinder is provided with a circular protrusion, an inner circumferential surface of one end of the connecting ring is provided with a circular baffle, the inner side surface of the circular baffle is attached to the side surface of the circular protrusion close to the stand column, the other end of the connecting ring is provided with a connecting plate, a buffer is filled in a cavity of the connecting ring, the connecting plate is fixedly connected with the middle positions of two arc parts of the rear fence respectively, and a pressure spring is sleeved outside the part, located between the stand column and the circular.
Preferably, one end of the rectangular strip extends out of one end face of the breast board, an inserting plate in the shape of a cuboid protrudes from the other end of the rectangular strip along the length of the rectangular strip, one end of the inserting plate is tightly inserted into one end of the rectangular through hole, and part of the inserting plate is positioned outside the cavity.
Preferably, the two opposite end faces of the middle part of the front breast board are respectively and fixedly connected with the two opposite end faces of the middle part of the rear breast board in a spot welding mode.
Preferably, two all be equipped with a plurality of couples on the relative both ends face of rectangle strip, couple on the rectangle strip sets up along the even interval of length direction of rectangle strip, the relative both ends of extension spring are hung respectively and are put on the couple of two rectangle strips.
The invention has the beneficial effects that:
1) double buffering is realized between the two arc-shaped parts of the rear breast board and the upright post through a buffer and a pressure spring; the elastic deformation capacity of the breast board is enhanced by adopting the front breast board and the rear breast board which are opposite; the front breast board and the rear breast board are connected through the rectangular strips and the tension springs, the length of the front breast board is smaller than that of the rear breast board, so that when collision occurs, the front breast board can move horizontally relative to the rear breast board and can move vertically relative to the rear breast board, and good buffering is achieved.
2) The middle part of the front breast board and the middle part of the rear breast board are temporarily fixed, the upper end and the lower end of the front breast board are respectively and temporarily clamped with the upper side and the lower side of the rear breast board, then two rectangular strips and a plurality of tension springs are inserted into the cavity as a whole, the two first flanges are respectively and tightly attached to one side surface of the two sliding chutes by reasonably setting the thicknesses of the first flanges and the third flanges and the widths of the sliding chutes, the two third flanges are respectively and tightly attached to the other side surfaces of the two sliding chutes, the two second flanges are respectively and tightly attached to the side surface of the rectangular through hole provided with the sliding chutes by tension of the plurality of tension springs on the two rectangular strips, the two fourth flanges are respectively and tightly attached to the side surface of the rectangular through hole provided with the sliding chutes, and then the upper end and the lower end of the front breast board are respectively and fixedly connected with the upper end and the lower end of the rear breast, therefore, the assembly of the invention is completed, welding is not needed in the whole process, and the assembly efficiency is higher; when the tension springs need to be replaced, only the two rectangular strips and the tension springs need to be taken out of the cavity, so that the device is convenient and efficient; outside tension is all preset to the upper and lower both sides of preceding breast board and the upper and lower both sides of back breast board for the upper and lower both ends of preceding breast board can respectively with the firmer connection at the upper and lower both ends of back breast board.
3) One end of the plugboard is tightly spliced with one end of the rectangular through hole, and part of the plugboard is positioned outside the cavity body and can limit the movement of the rectangular strip, so that when the plugboard is contacted with the first flanging, the second flanging, the third flanging or the fourth flanging, the rectangular strip is well moved to the optimal position (the optimal position refers to the distance of the rectangular strip extending out of the baffle plate as the optimal distance); the rectangular through hole cooperation alright realize the grafting of adjacent breast board of plugboard and adjacent rectangle strip, and is simple high-efficient.
4) The relative both ends face in front breast board middle part passes through spot welding's mode fixed connection with the relative both ends face in back breast board middle part respectively, has played the effect of the middle part of with front breast board and the middle part of back breast board fixed temporarily, can not be to the relative movement who prevents front breast board and back breast board moreover.
5) The two opposite end faces of the two rectangular strips are respectively provided with the plurality of hooks, and the two opposite ends of the tension spring are respectively hung on the hooks of the two rectangular strips, so that on one hand, the disassembly and assembly between the tension spring and the rectangular strips are convenient, and on the other hand, when the two rectangular strips and the plurality of tension springs are integrally inserted into the cavity, the mode of inserting the tension springs at the sides of the rectangular strips in a hanging manner can be adopted, and the disassembly and assembly of the invention are convenient.
Drawings
Fig. 1 is a schematic view of the overall structure of an anti-collision highway guardrail of the present invention;
fig. 2 is a schematic structural view of a connecting member in an anti-collision highway barrier according to the present invention;
FIG. 3 is a schematic assembly plan view of a front rail plate, a rear rail plate and a connecting piece of the anti-collision highway guardrail of the invention;
FIG. 4 is an enlarged fragmentary view at A of FIG. 3;
fig. 5 is an assembly schematic view of a rectangular bar and a patch panel in an anti-collision highway guardrail of the present invention.
In the figure: 1. a column; 2. a connecting member; 3. a breast board; 4. a cavity; 5. a tailgate; 6. a front breast board; 7. a first flanging; 8. second flanging; 9. third flanging; 10. a fourth flanging; 11. a rectangular strip; 12. a rectangular through hole; 13. a chute; 14. a plugboard; 15. a tension spring; 16. a connecting cylinder; 17. a pressure spring; 18. a circular bulge; 19. connecting the circular rings; 20. a circular baffle plate; 21. a connecting plate; 22. and (4) buffering.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to fig. 1 to 5, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The invention provides an anti-collision highway guardrail.
An anti-collision highway guardrail comprises an upright post 1, wherein the upright post 1 is fixedly connected with a breast board 3 through a connecting piece 2, the breast board 3 comprises a front breast board 6 and a rear breast board 5, the middle part of the front breast board 6 is connected with the middle part of the rear breast board 5, the upper end and the lower end of the front breast board 6 are respectively connected with the upper end and the lower end of the rear breast board 5, two cavities 4 are formed between the front breast board 6 and the rear breast board 5, outward tension is preset on the upper side and the lower side of the front breast board 6 and the upper side and the lower side of the rear breast board 5, first flanges 7 are arranged at the top and the bottom of the front breast board 6 in the cavities 4, second flanges 8 extend towards the front breast board 6 from the end parts of the first flanges 7, third flanges 9 are arranged at the top and the bottom of the rear breast board 5 in the cavities 4, fourth flanges 10 extend towards the rear breast board 5 from the end parts of the third flanges 9, and the guardrail further comprises two rectangular strips 11, the rectangular strip 11 is provided with a rectangular through hole 12 along the length direction, the end face of the rectangular strip 11 is provided with a sliding groove 13 along the length direction, the sliding groove 13 penetrates through two opposite side faces of the rectangular strip 11, the sliding groove 13 is communicated with the rectangular through hole 12, two first flanges 7 are respectively tightly attached to one side faces of the two sliding grooves 13, two third flanges 9 are respectively tightly attached to the other side faces of the two sliding grooves 13, a plurality of tension springs 15 are arranged between the two rectangular strips 11 at intervals, two second flanges 8 are respectively tightly attached to the side faces of the rectangular through hole 12, which are provided with the sliding grooves 13, two fourth flanges 10 are respectively tightly attached to the side faces of the rectangular through hole 12, which are provided with the sliding grooves 13, and the length of the front fence 6 is smaller;
the quantity of connecting piece 2 is two, connecting piece 2 is including connecting cylinder 16 and connection ring 19, the one end and the stand 1 fixed connection of connecting cylinder 16, the outer periphery of the connecting cylinder 16 other end is equipped with ring shape arch 18, the inner circumferential surface of connecting ring 19 one end is equipped with ring baffle 20, the medial surface of ring baffle 20 is laminated with the side that ring shape arch 18 is close to stand 1, the other end of connecting ring 19 is equipped with connecting plate 21, the cavity of connecting ring 19 is filled with buffer 22, two connecting plates 21 respectively with the intermediate position fixed connection of two arc parts of back breast board 5, the part overcoat that connecting cylinder 16 is located between stand 1 and ring baffle 20 has pressure spring 17.
Double buffering is realized between the two arc-shaped parts of the rear breast board 5 and the upright post 1 through the buffer 22 and the pressure spring 17; the elastic deformation capacity of the breast board 3 is enhanced by adopting the front breast board 6 and the rear breast board 5 which are opposite; preceding breast board 6 and after-board 5 are connected through rectangle strip 11 and a plurality of extension springs 15 between, and the length of preceding breast board 6 is less than after-board 5's length for when bumping, preceding breast board 6 can reciprocate for after-board 5 horizontal migration, again for after-board 5, has realized better buffering.
The middle part of the front breast board 6 and the middle part of the rear breast board 5 are temporarily attached and fixed, after the middle part of the front breast board 6 and the middle part of the rear breast board 5 are temporarily attached and fixed, at the moment, the upper side and the lower side of the front breast board 6 incline towards the direction far away from the rear breast board 5, the upper side and the lower side of the rear breast board 5 incline towards the direction far away from the front breast board 6, so that a certain gap is reserved between the top end and the bottom end of the front breast board 6 and the bottom end of the rear breast board 5, further, the upper side and the lower side of the front breast board 6 and the upper side and the lower side of the rear breast board 5 are preset with outward tension, the upper end and the lower end of the front breast board 6 are temporarily clamped with the upper side and the lower side of the rear breast board 5 respectively, then, the two rectangular strips 11 and a plurality of tension springs 15 are inserted into the cavity 4 as a whole, and the two first flanges 7, the thickness of the third flange 9 and the width, the two third flanges 9 are respectively tightly attached to the other side surfaces of the two sliding grooves 13, and the two second flanges 8 are respectively tightly attached to the side surfaces of the rectangular through holes 12, which are provided with the sliding grooves 13, through the tension of the tension springs 15 on the two rectangular strips 11, and the two fourth flanges 10 are respectively tightly attached to the side surfaces of the rectangular through holes 12, which are provided with the sliding grooves 13, so that the upper end and the lower end of the front fence 6 are respectively fixedly connected with the upper end and the lower end of the rear fence 5, and the middle part of the front fence 6 is fixedly connected with the middle part of the rear fence 5, and therefore, the assembly of the invention is completed, welding is not needed in the whole process, and the assembly; when the tension springs 15 need to be replaced, only the two rectangular strips 11 and the tension springs 15 need to be taken out of the cavity 4, so that the device is convenient and efficient; outside tension has all been preset to the upper and lower both sides of preceding breast board 6 and the upper and lower both sides of back breast board 5 for the upper and lower both ends of preceding breast board 6 can respectively with the firmer connection at the upper and lower both ends of back breast board 5.
Preferably, one end of the rectangular strip 11 extends out of one end face of the baffle 3, the opposite end of the rectangular strip 11 protrudes along the length thereof with a plug board 14 in the shape of a cuboid, one end of the plug board 14 is tightly plugged with one end of the rectangular through hole 12, and part of the plug board 14 is positioned outside the cavity 4. One end of the plugboard 14 is tightly plugged with one end of the rectangular through hole 12, and part of the plugboard 14 is positioned outside the cavity 4 and can limit the movement of the rectangular strip 11, so that when the plugboard 14 is contacted with the first flanging 7, the second flanging 8, the third flanging 9 or the fourth flanging 10, the rectangular strip 11 is cut and moved to an optimal position (the optimal position refers to the distance from the rectangular strip 11 to the breast board 3 as an optimal distance); the plugging plate 14 is matched with the rectangular through hole 12 of the adjacent rectangular strip 11 to realize the plugging of the adjacent breast board 3, and the method is simple and efficient.
Preferably, two opposite end faces of the middle part of the front breast board 6 are respectively and fixedly connected with two opposite end faces of the middle part of the rear breast board 5 in a spot welding mode. The opposite end surfaces in the middle of the front breast board 6 are respectively fixedly connected with the opposite end surfaces in the middle of the rear breast board 5 in a spot welding mode, the temporary fixing effect of the middle of the front breast board 6 and the middle of the rear breast board 5 is achieved, and the relative movement of the front breast board 6 and the rear breast board 5 cannot be prevented.
Preferably, a plurality of hooks (not shown) are arranged on two opposite end faces of the two rectangular strips 11, the hooks on the rectangular strips 11 are uniformly arranged at intervals along the length direction of the rectangular strips 11, and two opposite ends of the tension spring 15 are respectively hung on the hooks of the two rectangular strips 11. The two opposite end faces of the two rectangular strips 11 are respectively provided with the plurality of hooks, and the two opposite ends of the tension spring 15 are respectively hung on the hooks of the two rectangular strips 11, so that on one hand, the dismounting between the tension spring 15 and the rectangular strips 11 is facilitated, and on the other hand, when the two rectangular strips 11 and the plurality of tension springs 15 are integrally inserted into the cavity 4, the mode of inserting the rectangular strips 11 and hanging the tension springs 15 can be adopted, so that the dismounting of the invention is facilitated.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.
Claims (4)
1. An anti-collision highway guardrail comprises a stand column, wherein the stand column is fixedly connected with a guardrail plate through a connecting piece, and the anti-collision highway guardrail is characterized in that the guardrail plate comprises a front guardrail plate and a rear guardrail plate, the middle part of the front guardrail plate is connected with the middle part of the rear guardrail plate, the upper end and the lower end of the front guardrail plate are respectively connected with the upper end and the lower end of the rear guardrail plate, two cavities are formed between the front guardrail plate and the rear guardrail plate, outward tension is preset on the upper side and the lower side of the front guardrail plate and the upper side and the lower side of the rear guardrail plate, first flanges are arranged at the top and the bottom of the front guardrail plate in the cavity, the end part of each first flange extends towards the direction close to the front guardrail plate to form a second flange, third flanges are arranged at the top and the bottom of the rear guardrail plate in the cavity, fourth flanges extend towards the direction close to the rear guardrail plate from the end part of each third flange, and the, the rectangular strip is provided with a rectangular through hole along the length direction, the end face of the rectangular strip is provided with a sliding groove along the length direction, the sliding groove penetrates through two opposite side faces of the rectangular strip, the sliding groove is communicated with the rectangular through hole, the two first flanges are respectively tightly attached to one side face of the two sliding grooves, the two third flanges are respectively tightly attached to the other side faces of the two sliding grooves, a plurality of tension springs are arranged between the two rectangular strips at intervals, the two second flanges are respectively tightly attached to the side faces of the rectangular through hole, which are provided with the sliding grooves, the two fourth flanges are respectively tightly attached to the side faces of the rectangular through hole, which are provided with the sliding grooves, and the length of the front breast board is smaller than that of the;
the connecting piece is characterized in that the number of the connecting pieces is two, the connecting piece comprises a connecting cylinder and a connecting ring, one end of the connecting cylinder is fixedly connected with the stand column, an outer circumferential surface of the other end of the connecting cylinder is provided with a circular protrusion, an inner circumferential surface of one end of the connecting ring is provided with a circular baffle, the inner side surface of the circular baffle is attached to the side surface of the circular protrusion close to the stand column, the other end of the connecting ring is provided with a connecting plate, a buffer is filled in a cavity of the connecting ring, the connecting plate is fixedly connected with the middle positions of two arc parts of the rear fence respectively, and a pressure spring is sleeved outside the part, located between the stand column and the circular.
2. The anti-collision highway guardrail according to claim 1, wherein one end of the rectangular strip extends out of one end face of the guardrail plate, an insertion plate in the shape of a cuboid is protruded from the other opposite end of the rectangular strip along the length of the rectangular strip, one end of the insertion plate is tightly inserted into one end of the rectangular through hole, and part of the insertion plate is positioned outside the cavity.
3. The anti-collision expressway guardrail according to claim 2, wherein the two opposite end faces of the middle part of the front guardrail plate are fixedly connected with the two opposite end faces of the middle part of the rear guardrail plate in a spot welding manner.
4. The anti-collision highway guardrail according to claim 3, wherein a plurality of hooks are arranged on two opposite end faces of the rectangular strips, the hooks on the rectangular strips are uniformly arranged at intervals along the length direction of the rectangular strips, and two opposite ends of the tension spring are respectively hung on the hooks of the two rectangular strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196213.8A CN112240012B (en) | 2020-10-30 | 2020-10-30 | Anticollision highway guardrail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196213.8A CN112240012B (en) | 2020-10-30 | 2020-10-30 | Anticollision highway guardrail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112240012A true CN112240012A (en) | 2021-01-19 |
| CN112240012B CN112240012B (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011196213.8A Active CN112240012B (en) | 2020-10-30 | 2020-10-30 | Anticollision highway guardrail |
Country Status (1)
| Country | Link |
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| CN (1) | CN112240012B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113152323A (en) * | 2021-05-08 | 2021-07-23 | 四川省交通勘察设计研究院有限公司 | Anti-rockfall shed tunnel structure |
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| US20020021937A1 (en) * | 1999-09-23 | 2002-02-21 | Ochoa Carlos M. | Guardrail beam with improved edge region and method of manufacture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113152323A (en) * | 2021-05-08 | 2021-07-23 | 四川省交通勘察设计研究院有限公司 | Anti-rockfall shed tunnel structure |
| CN113152323B (en) * | 2021-05-08 | 2022-04-01 | 四川省交通勘察设计研究院有限公司 | Anti-rockfall shed tunnel structure |
| US11976429B2 (en) | 2021-05-08 | 2024-05-07 | Sichuan Communication Surveying & Design Institute Co., Ltd. | Shed tunnel structure for preventing falling rock |
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| Publication number | Publication date |
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| CN112240012B (en) | 2022-03-15 |
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