CN115387297B - Mud-rock flow drainage groove structure - Google Patents
Mud-rock flow drainage groove structure Download PDFInfo
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- CN115387297B CN115387297B CN202210960446.3A CN202210960446A CN115387297B CN 115387297 B CN115387297 B CN 115387297B CN 202210960446 A CN202210960446 A CN 202210960446A CN 115387297 B CN115387297 B CN 115387297B
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- Prior art keywords
- drainage
- channel
- groove
- debris flow
- outflow
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- 239000011435 rock Substances 0.000 title description 5
- 210000000038 chest Anatomy 0.000 claims abstract description 42
- 230000000979 retarding effect Effects 0.000 claims abstract description 18
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000002265 prevention Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 20
- 238000005299 abrasion Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B11/00—Drainage of soil, e.g. for agricultural purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Braking Arrangements (AREA)
- Road Paving Structures (AREA)
Abstract
The application relates to the technical field of debris flow disaster prevention and control, in particular to a debris flow drainage groove structure. The debris flow drainage groove structure comprises at least one drainage unit, the drainage unit comprises a body structure, the body structure is provided with a retarding groove, a rib cage is arranged in the retarding groove, and the inner wall of the retarding groove is provided with a flow inlet channel and a flow outlet channel; the inflow channel and the outflow channel are respectively positioned at two opposite sides of the rib cage in the length direction. The debris flow control method comprises the following steps: manufacturing a drainage guide unit, wherein the drainage guide unit comprises a body structure, the body structure is provided with a retarding groove, a rib sill is arranged in the retarding groove, and an inflow channel and an outflow channel are formed in the inner wall of the retarding groove; the inflow channel and the outflow channel are respectively positioned at two opposite sides of the rib cage in the length direction; and arranging the plurality of drainage and guide units in the preset area along the first direction in sequence to form a debris flow drainage and guide groove structure. The application realizes the stability of the debris flow drainage groove structure, is beneficial to maintenance and reduces maintenance cost.
Description
Technical Field
The application relates to the technical field of debris flow disaster prevention and control, in particular to a debris flow drainage groove structure.
Background
As a saturated or supersaturated heterogeneous fluid, the debris flow has the characteristics of high fluid volume weight, large particle size of the stone, wide particle grading, heterogeneous mixing in the fluid, and matrix pulsation during movement, and is a common geological disaster type in mountain areas of China. The drainage groove is one of the measures which are most widely applied, have the most important functions and have the most prominent disaster reduction effect in debris flow prevention engineering. The abrasion at the bottom of the groove is a main factor influencing the service efficiency and the service life of the drainage groove, so that the normal operation of the drainage groove engineering is ensured, the integral debris flow control system is ensured not to lose effectiveness due to the loss of the drainage function, and the requirement on the erosion resistance and the wear resistance of the drainage groove is emphasized when the debris flow control engineering is planned.
In a specific project, a full lining mode and a transverse rib sill are often adopted to improve the anti-scouring performance of the debris flow, but the inventor finds that the problems of rapid project damage and high maintenance cost occur due to extremely strong abrasion capability of the debris flow.
Disclosure of Invention
In order to solve one of the above technical problems, an embodiment of the present application provides a debris flow drainage groove structure.
The embodiment of the application provides a debris flow drainage and guide groove structure, which comprises a plurality of drainage and guide units, wherein the drainage and guide units are arranged at intervals along the flow direction of debris flow and are communicated with one another; the drainage guide unit comprises a body structure, the body structure is provided with a retarding groove, a rib sill is arranged on the inner wall of the retarding groove in a protruding mode, and the length direction of the rib sill is perpendicular to the flow direction of the debris flow.
Optionally, an inflow channel and an outflow channel are formed on the inner wall of the retarder; the inflow channel and the outflow channel are respectively positioned at two opposite sides of the rib cage in the length direction; and the outflow channel of one row of guide units is communicated with the inflow channel of the other row of guide units.
Optionally, the rib cage comprises a top surface, a bottom surface, and two first, second and third sides disposed between the top and bottom surfaces; the top surface is opposite to the bottom surface, and the bottom surface is connected with the inner wall of the retarding groove; the two first side surfaces are oppositely arranged; the third side face is a curved face protruding outwards, the second side face and the third side face are arranged oppositely, the third side face faces the inflow channel, and the second side face faces the outflow channel.
Optionally, in each of the drainage guide units, the rib cage is close to the outflow passage, and the rib cage is far from the inflow passage.
Optionally, the retarder groove is spherical crown-shaped.
Optionally, the row guide unit is prefabricated by concrete.
Optionally, the top surfaces of the plurality of row guide units are coplanar to form a first plane, a first included angle is formed between the length direction of the inflow channel and the first plane, and a second included angle is formed between the length direction of the outflow channel and the first plane.
Optionally, the distance between the passage opening of the inflow passage on the inner wall of the retarder tank and the first plane is larger than the distance between the passage opening of the outflow passage on the inner wall of the retarder tank and the first plane.
Optionally, the rib cage is located between a passage opening of the inflow passage on the inner wall of the retarder tank and a passage opening of the outflow passage on the inner wall of the retarder tank; the distance between the top of the rib cage and the first plane is larger than the distance between the passage opening of the outflow channel on the inner wall of the retarder groove and the first plane.
Optionally, the number of the inflow channels in each of the drainage units is equal to the number of the outflow channels; and in the adjacent two row guide units, the inflow channel of one row guide unit is communicated with the outflow channel of the other row guide unit in a one-to-one correspondence.
Compared with the prior art, the debris flow drainage groove structure provided by the embodiment of the application has the following technical effects:
according to the debris flow drainage groove structure, the rib sills are arranged in the retarder groove of the body structure, so that when debris flow fluid flows through the retarder groove, the fluid forms vortex in the structure due to the blocking of the rib sills in the retarder groove, and the large-area rapid erosion of the fluid to the retarder groove is weakened. Meanwhile, the rib sills can ensure that fluid cannot be thrown out or block the outflow channel, and the dilute components in the fluid can flow out along the outflow channel or the upper opening of the retarding groove, so that the stability of the debris flow drainage groove structure is realized, the maintenance is facilitated, and the maintenance cost is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a longitudinal cross-sectional view of a debris flow chute structure along a downhill path according to one or more embodiments of the present application;
FIG. 2 is a longitudinal cross-sectional view of a retarder tank along a downhill path according to one or more embodiments of the present application;
FIG. 3 is a schematic structural view (top view) of a debris flow drainage chute according to one or more embodiments of the present application;
FIG. 4 is a schematic view of a rib cage according to one or more embodiments of the present application;
fig. 5 is a schematic diagram illustrating an operation principle of the drainage unit according to one or more embodiments of the present application.
The figures are marked as follows:
101. a body structure; 102. a retarder groove; 103. a rib cage; 104. an outflow channel; 105. an inflow channel; 106. a top surface; 107. a bottom surface; 108. a first side; 109. a second side; 110. and a third side.
Detailed Description
The embodiment of the application discloses a debris flow drainage and guide groove structure, which aims to solve the problems of rapid engineering damage and high maintenance cost caused by extremely strong debris flow abrasion capability.
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of exemplary embodiments of the present application is provided in conjunction with the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application and not exhaustive of all embodiments. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
Referring to fig. 1, in one or more embodiments, the present application provides a debris flow drainage groove structure including a plurality of drainage units spaced apart in a flow direction of a debris flow and communicating with each other; the drainage guide unit comprises a body structure 101, the body structure 101 is provided with a retarding groove 102, and a rib cage 103 is convexly arranged on the inner wall of the retarding groove 102. The length direction of the rib cage is perpendicular to the flow direction of the debris flow.
Referring to fig. 5, by providing the rib cage 103 in the retarder groove 102 of the body structure 101, when the debris flow fluid flows through the retarder groove 102, the fluid forms vortex in the structure due to the blocking of the rib cage 103 in the retarder groove 102, and the large-area rapid erosion of the fluid to the retarder groove 102 is reduced. Meanwhile, the rib cage 103 can ensure that the fluid does not throw out or block the outflow channel 104, and the dilute component in the fluid can flow out along the outflow channel 104 or the upper opening of the retarding groove 102, so that the stability of the debris flow drainage groove structure is realized, the maintenance is facilitated, and the maintenance cost is reduced.
In some embodiments, the inner wall of the retarder tank 102 is provided with an inlet channel 105 and an outlet channel 104. The inflow channel 105 and the outflow channel 104 are used for fluid to flow through, the plurality of drainage guide units are sequentially arranged along the flow direction of the debris flow, and the plurality of drainage guide units are communicated with the outflow channel through the inflow channel, wherein the outflow channel of one drainage guide unit is communicated with the inflow channel of the other drainage guide unit between two adjacent drainage guide units; the upper portion of the retarder tank 102 is open. The inflow passage 105 and the outflow passage 104 are located on opposite sides of the rib cage 103 in the longitudinal direction, respectively. The rib cage 103 is of a linear structure, is located in the retarder 102 and is of an integral structure with the inner wall of the retarder 102, so that the position of the rib cage 103 in the retarder 102 is unchanged, and the effect of the rib cage 103 can be fully exerted.
Referring to fig. 4, in some embodiments, the rib cage 103 includes a top surface 106, a bottom surface 107, two first side surfaces 108, a second side surface 109, and a third side surface 110; two first sides 108, one second side 109 and one third side 110 are each located between the top and bottom surfaces. The top surface 106 is opposite to the bottom surface 107, and the bottom surface 107 is connected with the inner wall of the retarder 102; the two first sides 108 are disposed opposite; the third side 110 is a curved surface protruding outwards, so that part of the fluid is easy to pass the rib cage 103 on the basis of the fact that the third side 110 is curved to facilitate the realization of vortex. The second side 109 and the third side 110 are arranged opposite to each other, the outflow channel 104 is located at a side of the second side 109, the inflow channel 105 is located at a side of the third side 110, i.e. the third side faces the inflow channel, and the second side faces the outflow channel.
In one embodiment, the top surface 106 is planar and the second side surface 109 is planar.
In some embodiments, in each row guide unit, the rib cage 103 is close to the outflow channel 104, and the rib cage 103 is far from the inflow channel, in particular, the distance between the auxiliary cage and the channel opening of the inflow channel 105 on the inner wall of the retarder tank 102 is larger than the distance between the auxiliary cage and the channel opening of the outflow channel on the inner wall of the retarder tank 102. This facilitates protection of the outflow channel 104, reducing the likelihood of debris flow blocking the outflow channel.
In some embodiments, the retarder tank 102 is in a spherical crown shape, the top of the retarder tank is open, the inner wall is an arc surface, and the retarder tank 102 has a certain depth, so that fluid can flow in the retarder tank 102 conveniently, and a buffering effect is achieved.
In some embodiments, the drainage and guide unit adopts a concrete prefabricated structure, namely: the mud-rock flow drainage groove structure is prefabricated by concrete, so that stability of the mud-rock flow drainage groove structure can be improved, and service life of the mud-rock flow drainage groove structure is prolonged. The rib cage also adopts a concrete prefabricated structure, can be integrally formed with the row guide unit, has higher strength and reliability, and can bear larger impact force.
Referring to fig. 2, in some embodiments, top surfaces of the plurality of row guide units are coplanar to form a first plane, a first included angle is formed between a length direction of the inlet channel and the first plane, and a second included angle is formed between a length direction of the outlet channel and the first plane. In one embodiment, the first plane is parallel to the slope surface of the slope when the debris flow drainage channel structure is disposed on the slope; the first included angle is equal to the second included angle. The distance between the channel opening of the inflow channel 105 on the inner wall of the retarder tank 102 and the first plane is larger than the distance between the channel opening of the outflow channel 104 on the inner wall of the retarder tank 102 and the first plane, which is beneficial to playing a better overflow role, so that the channel opening of the outflow channel 104 is not easy to be blocked by the stones with large particle size.
In some embodiments, the rib cage is located on the inner wall of the retarder between the passage opening of the inlet channel on the inner wall of the retarder and the passage opening of the outlet channel on the inner wall of the retarder; the distance between the top of the rib cage and the first plane is larger than the distance between the passage opening of the outflow channel on the inner wall of the retarder groove and the first plane. After the arrangement, the rib cage can enable the fluid to pass through the inlet outflow channel and has an interception function to a certain extent, so that the fluid at the lower part forms vortex.
In some embodiments, the number of the inflow channels 105 in each row guiding unit is multiple, and the multiple inflow channels 105 are arranged at intervals; the number of the outflow passages 104 is plural, and the plural outflow passages 104 are arranged at intervals. This facilitates the draining of fluid from the retarder tank 102.
In some embodiments, the number of the row guide units is a plurality, and the plurality of row guide units are sequentially arranged along a first direction, and the first direction is parallel to the first plane. In one embodiment, the first direction is parallel to a downhill direction of the ramp. The retarder grooves 102 of two adjacent drainage and guide units are arranged at intervals, so that gradual deceleration of debris flow is facilitated.
Referring to fig. 3, in some embodiments, the number of inlet channels 105 and the number of outlet channels 104 in each row of guide units are equal; in the two adjacent row guide units, a plurality of inflow channels 105 of one row guide unit are communicated with a plurality of outflow channels 104 of the other row guide unit in a one-to-one correspondence. In one embodiment, the number of inlet channels 105 is two and the number of outlet channels 104 is two. The two inflow channels 105 are symmetrically arranged with a first reference line parallel to the first direction as a symmetry axis; the two outflow passages 104 are symmetrically arranged with a first reference line parallel to the first direction as a symmetry axis; the first reference line passes through the midpoint in the longitudinal direction of the rib cage 103 and is perpendicular to the longitudinal direction of the rib cage 103.
Referring to fig. 2, 3 and 4, in the debris flow drainage and guide groove structure according to at least one embodiment of the present application, the buffer groove is semicircular in cross section, the radius corresponding to the circle is R, and the distance between two adjacent buffer grooves 102 is L. An included angle formed by connecting the two ends of the rib cage 103 in the length direction with the center of the retarder 102 is 2α; the height of the rib cage 103 is h, the width of the top surface 106 of the rib cage 103 is D, the width of the bottom surface 107 of the rib cage 103 is D, and the length of the rib cage 103 is l, l=2r·sin α. In each row guide unit, the interval between two inflow channels 105 is 2n, and the interval between two outflow channels 104 is 2n; the cross section of the inlet channel 105 is circular, the radius is r, the cross section of the outlet channel is circular, and the radius is r, namely the cross section diameter of the inlet channel 105 is equal to the cross section diameter of the outlet channel. θ for a first angle between the inlet flow channel 105 and the first plane; the distance between the channel opening of the inflow channel 105 on the inner wall of the retarder tank 102 and the first plane, i.e. the sagittal height is a; the second included angle between the outflow channel 104 and the first plane is θ, and the distance between the channel opening of the outflow channel 104 on the inner wall of the retarder tank 102 and the first plane, i.e. the sagittal height is b. In some embodiments, r=40 to 50cm, l is 40 to 50cm, α is 35 ° to 40 °, l is 46 to 64cm, h is 10 to 15cm, d is 3 to 5cm, d is 8 to 10cm, R is 8 to 10cm, θ is 15 ° to 20 °, a is 20 to 25cm, b is 10 to 15cm. In one embodiment, r=40 cm, l=40 cm, α=35°, l=46 cm, h=10 cm, d=3 cm, d=8 cm, r=8 cm, θ=15°, a=20 cm, b=10 cm.
In summary, the debris flow drainage groove structure provided by the application has strong abrasion resistance and strong practicability, and can ensure ecological coordination, when debris flow occurs, the debris flow enters the retarder 102 through the upper opening of the retarder 102 and the inflow section of the inflow channel 105, is intercepted by the rib cage 103 in the retarder 102, the lower fluid forms vortex, and meanwhile, the dilute component is discharged from the upper opening and the outflow channel 104. The debris flow drainage groove structure can realize the retarding and abrasion resistance of debris flow, has the advantages of strong integrity, simple arrangement and good durability, and can effectively slow down the flow speed of the debris flow flowing through the debris flow drainage groove, thereby weakening the abrasion of the bottom plate of the debris flow drainage groove and ensuring smooth drainage and conduction of the debris flow.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (5)
1. The debris flow drainage groove structure is characterized by comprising a plurality of drainage units, wherein the drainage units are arranged at intervals along the flow direction of debris flow and are communicated with one another; the top surfaces of the plurality of row guide units are coplanar to form a first plane; the drainage guide unit comprises a body structure, the body structure is provided with a retarding groove, a rib sill is convexly arranged on the inner wall of the retarding groove, and the length direction of the rib sill is perpendicular to the flow direction of the debris flow;
an inflow channel and an outflow channel are formed in the inner wall of the retarding groove; the inflow channel and the outflow channel are respectively positioned at two sides of the rib cage; the outflow channel of the row guide unit is communicated with the inflow channel of the adjacent row guide unit; a first included angle is formed between the length direction of the inflow channel and the first plane, and a second included angle is formed between the length direction of the outflow channel and the first plane; the distance between the passage opening of the inflow passage on the inner wall of the retarder groove and the first plane is larger than the distance between the passage opening of the outflow passage on the inner wall of the retarder groove and the first plane;
in each drainage unit, the rib cage is close to the outflow passage, and the rib cage is far away from the inflow passage; the rib cage is positioned between a passage opening of the inflow passage on the inner wall of the retarder and a passage opening of the outflow passage on the inner wall of the retarder; the distance between the top of the rib cage and the first plane is larger than the distance between the passage opening of the outflow passage on the inner wall of the retarder and said first plane.
2. The debris flow drainage trough structure of claim 1, wherein the rib cage comprises a top surface, a bottom surface, and two first, second and third sides disposed between the top surface and the bottom surface; the top surface is opposite to the bottom surface, and the bottom surface is connected with the inner wall of the retarding groove; the two first side surfaces are oppositely arranged; the third side face is a curved face protruding outwards, the second side face and the third side face are arranged oppositely, the third side face faces the inflow channel, and the second side face faces the outflow channel.
3. The debris flow drainage trough structure of claim 1, wherein the retardation trough is spherical crown shaped.
4. The debris flow drainage and guide groove structure according to claim 1, wherein the drainage and guide unit is prefabricated by concrete.
5. The debris flow drainage trough structure according to any one of claims 1 to 4, wherein the number of the inflow channels in each drainage unit is equal to the number of the outflow channels; and in the adjacent two row guide units, the inflow channel of one row guide unit is communicated with the outflow channel of the other row guide unit in a one-to-one correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210960446.3A CN115387297B (en) | 2022-08-11 | 2022-08-11 | Mud-rock flow drainage groove structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210960446.3A CN115387297B (en) | 2022-08-11 | 2022-08-11 | Mud-rock flow drainage groove structure |
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| Publication Number | Publication Date |
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| CN115387297A CN115387297A (en) | 2022-11-25 |
| CN115387297B true CN115387297B (en) | 2023-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210960446.3A Active CN115387297B (en) | 2022-08-11 | 2022-08-11 | Mud-rock flow drainage groove structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476305A (en) * | 2009-01-21 | 2009-07-08 | 中国科学院水利部成都山地灾害与环境研究所 | Mud-stone flow discharge guiding groove based on step anti-flushing notched sill group and use thereof |
| CN206859174U (en) * | 2017-05-16 | 2018-01-09 | 贵州工程应用技术学院 | A kind of highway leads device with debris flow drainage |
| CN109281286A (en) * | 2018-10-22 | 2019-01-29 | 浙江水利水电学院 | A kind of construction method of mountain area energy dissipating diversion channel |
| CN213389969U (en) * | 2020-05-07 | 2021-06-08 | 中国电建集团华东勘测设计研究院有限公司 | Slag filling field protection and drainage structure suitable for narrow groove |
| CN216304574U (en) * | 2021-07-27 | 2022-04-15 | 王圣娟 | Abrasion-resistant structure of debris flow drainage groove |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256768B (en) * | 2015-09-09 | 2017-03-22 | 中国科学院水利部成都山地灾害与环境研究所 | Box energy dissipation section designing method of box energy dissipation debris flow discharging and guiding groove |
-
2022
- 2022-08-11 CN CN202210960446.3A patent/CN115387297B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476305A (en) * | 2009-01-21 | 2009-07-08 | 中国科学院水利部成都山地灾害与环境研究所 | Mud-stone flow discharge guiding groove based on step anti-flushing notched sill group and use thereof |
| CN206859174U (en) * | 2017-05-16 | 2018-01-09 | 贵州工程应用技术学院 | A kind of highway leads device with debris flow drainage |
| CN109281286A (en) * | 2018-10-22 | 2019-01-29 | 浙江水利水电学院 | A kind of construction method of mountain area energy dissipating diversion channel |
| CN213389969U (en) * | 2020-05-07 | 2021-06-08 | 中国电建集团华东勘测设计研究院有限公司 | Slag filling field protection and drainage structure suitable for narrow groove |
| CN216304574U (en) * | 2021-07-27 | 2022-04-15 | 王圣娟 | Abrasion-resistant structure of debris flow drainage groove |
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| Publication number | Publication date |
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| CN115387297A (en) | 2022-11-25 |
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