CN111926775A - River course slope protection laying construction method for hydraulic engineering - Google Patents
River course slope protection laying construction method for hydraulic engineering Download PDFInfo
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- CN111926775A CN111926775A CN202010865132.6A CN202010865132A CN111926775A CN 111926775 A CN111926775 A CN 111926775A CN 202010865132 A CN202010865132 A CN 202010865132A CN 111926775 A CN111926775 A CN 111926775A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/128—Coherent linings made on the spot, e.g. cast in situ, extruded on the spot
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
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- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
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Abstract
The application relates to a river course revetment laying construction method for hydraulic engineering, which comprises the following steps: s1, forming reinforcing holes on the slope of the revetment; s2, inserting reinforcing steel bars into the reinforcing holes, and binding the steel bars by using steel wires to fix the positions of the steel bars; s3, pouring concrete into the reinforcing holes to fix the reinforcing steel bars and the revetment in a pouring manner, and then removing the steel wires for bundling the reinforcing steel bars; s4, paving broken stones on the slope surface of the protection slope to form a broken stone layer arranged in parallel to the slope surface of the protection slope; s5, pouring concrete on the gravel layer to form a concrete layer, and pouring impermeable concrete on the concrete layer after the concrete layer is cured to form an impermeable layer; s6, paving a reinforcing brick, and inserting and fixing the reinforcing brick and the end part of the reinforcing steel bar penetrating through the reinforcing hole; and S7, pouring impermeable concrete between the reinforcing bricks and the impermeable layer to fix the reinforcing bricks and the impermeable layer. This application has the effect of the anti scour protection ability of promotion bank protection.
Description
Technical Field
The application relates to the field of hydraulic engineering, in particular to a river course revetment laying construction method for hydraulic engineering.
Background
At present, in the construction of water conservancy projects, river regulation is an important link for keeping water environment facilities safe. In the in-service use in river course, the bank protection of river course both sides often receives the impact of river water in the river course and the erodeing of rainwater for the soil erosion and water loss on bank protection surface has destroyed the structure of bank protection to a certain extent, all causes harmful effects to the job stabilization nature of river course guide river water.
Nowadays, in the correlation technique of river course structure, many river course structures still adopt the form reinforcement bank protection of concreting on the slope surface of bank protection simply, lack along the ascending limiting displacement in domatic direction between concrete inoxidizing coating that forms among this kind of bank protection structure and the bank protection, cause the skew between inoxidizing coating and the slope body easily, cause the inoxidizing coating to drop even.
In view of the above-mentioned related art, the inventors consider that there is a drawback that the washing-out resistance is not strong.
Disclosure of Invention
In order to promote the anti-scouring ability of the revetment, the application provides a construction method is laid to river course revetment for hydraulic engineering.
The application provides a river course revetment paving construction method for hydraulic engineering adopts following technical scheme.
A construction method for laying river channel revetments for hydraulic engineering comprises the following steps:
s1, forming reinforcing holes on the slope of the revetment;
s2, inserting reinforcing steel bars into the reinforcing holes to enable one ends of the reinforcing steel bars to be located outside the reinforcing holes, and binding the reinforcing steel bars by using steel wires to enable the positions of the reinforcing steel bars to be fixed;
s3, pouring concrete into the reinforcing holes to fix the reinforcing steel bars and the revetment in a pouring manner, and then removing the steel wires for bundling the reinforcing steel bars;
s4, paving broken stones on the slope surface of the protection slope to form a broken stone layer arranged in parallel to the slope surface of the protection slope;
s5, pouring concrete on the gravel layer to form a concrete layer, and pouring impermeable concrete on the concrete layer after the concrete layer is cured to form an impermeable layer;
s6, paving a reinforcing brick, and inserting and fixing the reinforcing brick and the end part of the reinforcing steel bar penetrating through the reinforcing hole;
and S7, pouring impermeable concrete between the reinforcing bricks and the impermeable layer to fix the reinforcing bricks and the impermeable layer.
Through adopting above-mentioned technical scheme, rubble layer and concrete layer form in proper order on the river course bank protection, the domatic earth of bank protection has been completely cut off, and the setting of reinforcement reinforcing bar, make to have between concrete layer and the bank protection along the domatic limiting displacement of bank protection, make the connection between bank protection and the concrete layer more firm, and the setting of reinforcing brick, river and the rainwater to scouring concrete layer have the hindrance effect, and the impact that the reinforcing brick received is transmitted inside the bank protection through reinforcing bar, thereby river and rainwater scouring to the erosion effect on bank protection surface has been reduced, prevent the soil erosion and water loss on bank protection surface.
Preferably, the reinforcing brick comprises a bulge part which is bulged upwards along the slope surface of the slope protection and water guide parts which are arranged on two sides of the bulge part; the water guide part is arc-shaped strip, one end of the water guide part is connected with the bulge, the other end of the water guide part extends along the slope surface of the slope protection, and the arc of the water guide part surrounds the circle center and is positioned on the upper side of the water guide part.
Through adopting above-mentioned technical scheme, when the rainwater at bank protection top trickled to when consolidating on the brick, the rainwater trickled along the water guide portion of bellying both sides respectively under the reposition of redundant personnel effect of bellying, has disperseed the impact of rainwater, and the arc of water guide portion encircles the centre of a circle and is located the water guide portion upside to make the rainwater most impact when flowing to the end that the bellying was kept away from to the water guide portion transmit to the water guide portion on, be favorable to slowing down the impact of rivers.
Preferably, the reinforcing bricks are provided with a plurality of groups, the plurality of groups of reinforcing bricks are arranged along the slope surface of the slope protection from top to bottom, and the plurality of reinforcing bricks in the same group are sequentially connected and arranged along the extending direction of the slope protection; and the two adjacent water guide parts in the horizontal direction are in inserted fit.
Through adopting above-mentioned technical scheme, the rivers that flow to on the adjacent water guide portion impact together along two water guide portions for impact on the rivers offsets each other, is favorable to slowing down the impact of rivers to the domatic concrete layer of slope.
Preferably, the water guide part is provided with a water guide hole, and the opening of the water guide hole at the bottom of the reinforced brick faces to the bulge part at the lower side of the reinforced brick.
Through adopting above-mentioned technical scheme, the setting of water guide hole for the rainwater that stores up on the water guide flows to the bellying of water guide portion downside along the water guide hole on, makes the rivers of rainwater constantly separated into two strands, thereby plays the effect of refining rivers, dispersion impact.
Preferably, the surface of the reinforcing brick connected with the impermeable layer is provided with an inserting hole for inserting the reinforcing steel bar, the reinforcing brick is internally provided with a bending cavity communicated with the inserting hole, and the inner surface of the bending cavity far away from the inserting hole is obliquely arranged.
Through adopting above-mentioned technical scheme, when consolidating the brick and strengthening the tip grafting that the reinforcing bar is located outside the strengthening hole, consolidate the reinforcing bar tip and penetrate the intracavity of bending through the spliced eye, and at this grafting in-process, consolidate the reinforcing bar tip and penetrate the intracavity of bending and support the slope internal surface in the chamber of bending to make the reinforcing bar tip bend, make between reinforcing bar and the reinforcing brick can be spacing in the grafting direction, make the reinforcing bar and consolidate the connection between the brick more firm.
Preferably, the surface of the reinforcing brick, which is far away from the impermeable layer, is provided with a pouring opening communicated with the bending cavity; in step S7, a part of impermeable concrete is poured into the bending cavity through the pouring opening, so that the bending cavity is sealed.
Through adopting above-mentioned technical scheme, after reinforcing brick and reinforcing steel bar are pegged graft, fill full seepage prevention concrete in the bending intracavity through pouring into the mouth for reinforcing steel bar tip is sealed, is favorable to preventing the corrosion of reinforcing steel bar, makes the connection between reinforcing brick and the reinforcing steel bar more durable.
Preferably, the inclined inner surface of the bending cavity is inclined towards the pouring opening.
Through adopting above-mentioned technical scheme, at the grafting in-process of reinforcing bar and reinforced brick, reinforcing bar tip fills the mouth in orientation and extends under the butt effect of bending intracavity slope internal surface, and in extending to filling the mouth until reinforcing bar tip for reinforcing bar and filling the mouth are close to the inner wall butt of bending the intracavity slope internal surface, thereby make and lock between reinforcing bar and the reinforced brick.
Preferably, in step S6, the reinforcing bricks are sequentially inserted along the extending direction of the revetment, and the filling opening on the reinforcing brick being laid is located on the side of the reinforcing steel bar on the reinforcing brick far away from the laid reinforcing brick.
Through adopting above-mentioned technical scheme, lay the reinforcement brick in proper order in step S6, and support the mouth inner wall that fills that should consolidate the brick with the reinforcement reinforcing bar tip of the reinforcement brick grafting of back installation for this reinforcement brick has the effort with the reinforcement brick butt of installing earlier, thereby makes to peg graft more firmly between the reinforcement brick of installation.
In summary, the present application includes at least one of the following beneficial technical effects:
the arrangement of the reinforcing steel bars ensures that the concrete layer and the revetment have a limiting effect along the slope surface of the revetment, so that the connection between the revetment and the concrete layer is firmer, the arrangement of the reinforcing bricks has a blocking effect on river water and rainwater flushed with the concrete layer, and the impact borne by the reinforcing bricks is transmitted to the interior of the revetment through the reinforcing steel bars, so that the erosion effect of the river water and the rainwater flushing on the surface of the revetment is reduced, and the water and soil loss on the surface of the revetment is prevented;
the water flow flowing to the adjacent water guide parts is impacted together along the two water guide parts, so that the impact on the water flow is mutually offset, and the impact of the water flow on a concrete layer on the slope surface of the slope body is favorably relieved;
the arrangement of the water guide holes enables rainwater accumulated on the water guide part to flow to the protruding part on the lower side of the water guide part along the water guide holes, so that the rainwater of the rainwater is continuously divided into two strands, and the effects of thinning the rainwater and dispersing impact are achieved.
Drawings
Fig. 1 is a schematic view of construction positions of reinforcing holes in a river course slope protection laying construction method for water conservancy engineering according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a slope protection when reinforcing bricks are laid in the river channel slope protection laying construction method for hydraulic engineering according to the embodiment.
Figure 3 is a schematic front view of a reinforced tile.
Figure 4 is a schematic view of the back of a reinforced tile.
Fig. 5 is a schematic structural view of the reinforcing steel bar and the reinforcing brick in insertion connection.
Description of reference numerals: 1. slope protection; 11. reinforcing holes; 12. reinforcing steel bars; 13. a crushed stone layer; 14. a concrete layer; 15. an impermeable layer; 2. reinforcing the brick; 21. a boss portion; 211. inserting holes; 212. bending the cavity; 213. an infusion port; 22. a water guide part; 221. a water guide hole; 222. an insertion block; 223. and (4) inserting grooves.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses a river course revetment paving construction method for hydraulic engineering. Referring to fig. 1, the river course slope protection laying construction method for hydraulic engineering comprises the following steps:
s1, referring to fig. 1, reinforcing holes 11 are formed on the slope of the revetment 1. The opening of reinforcement hole 11 is circular, and the axis of reinforcement hole 11 is perpendicular with the domatic of bank protection 1, and reinforcement hole 11 is equipped with many places. Many places reinforcement hole 11 divide into six groups altogether, six sets of reinforcement hole 11 along 1 domatic in the bank protection from top to bottom in proper order align to grid, and the many places reinforcement hole 11 of the same group along 1 extending direction horizontal align to grid of bank protection, in addition, adjacent two sets of reinforcement hole 11 alternate arrangement on the horizontal extending direction of bank protection 1.
S2, referring to fig. 2, inserting reinforcing bars 12 into the reinforcing holes 11 such that one ends of the reinforcing bars 12 are positioned outside the reinforcing holes 11, and binding the reinforcing bars using wires such that the positions of the reinforcing bars are fixed.
And S3, pouring concrete into the reinforcing holes 11, so that one ends of the reinforcing steel bars 12 in the reinforcing holes 11 are fixedly poured with the revetment 1, and removing the steel wires binding the reinforcing steel bars 12 after the concrete in the reinforcing holes 11 is cured.
And S4, paving broken stones on the slope surface of the revetment 1 to form a broken stone layer 13 arranged parallel to the slope surface of the revetment 1.
S5, pouring concrete on the gravel layer 13 to form a concrete layer 14, and after the concrete layer 14 is cured, pouring impermeable concrete on the concrete layer 14 to form an impermeable layer 15; the concrete layer 14 and the impermeable layer 15 are both arranged in parallel with the slope surface of the revetment 1. In addition, the ends of the reinforcing bars 12 outside the reinforcement holes 11 penetrate through the concrete layer 14 and the impermeable layer 15.
And S6, paving the reinforcing bricks 2.
Referring to fig. 2 and 3, the reinforcing brick 2 includes a protrusion 21 and a water guide 22, and the protrusion 21 is in a rectangular block shape and is prefabricated after concrete is poured and solidified. The water guide part 22 is arc-shaped, the cross section of the water guide part 22 perpendicular to the arc extending direction of the water guide part is rectangular, two water guide parts 22 are arranged on the reinforcing brick 2, and the two water guide parts 22 are respectively arranged on two sides of the protruding part 21. The arc of the water guide part 22 surrounds the center of a circle and is located on the upper side of the water guide part 22, one end of the water guide part 22 is connected with the bottom of the bulge part 21, the other end of the water guide part 22 extends towards the direction far away from the bulge part 21, and in addition, the water guide part 22 and the bulge part 21 are integrally cast. In addition, a water guide hole 221 is formed in the upper arc-shaped surface of the water guide part 22 on the side of the protruding part 21, the axis of the water guide hole 221 intersects with the arc-shaped extending direction of the water guide part 22, and the water guide hole 221 is communicated with the lower arc-shaped surface of the water guide part 22. The water guide portion 22 on one side of the protruding portion 21 is provided with an insertion block 222, the insertion block 222 is a rectangular block shape and is fixed on an end surface of the water guide portion 22 far away from the protruding portion 21, and the insertion block 222 and the water guide portion 22 are integrally formed. The water guiding portion 22 on the other side of the protruding portion 21 is provided with an insertion groove 223, the insertion groove 223 is disposed on an end surface of the water guiding portion 22 far away from the protruding portion 21, and the insertion block 222 is inserted and matched with the insertion groove 223.
Referring to fig. 3 and 4, the surface of the protruding portion 21 parallel to the arc extending direction of the water guide portion 22 is provided with an insertion hole 211, an opening of the insertion hole 211 is circular, and a vertical plane where an axis of the insertion hole 211 is located is a symmetrical plane of the water guide portion 22 on two sides of the reinforced brick 2. Referring to fig. 2 and 5, a bending cavity 212 is formed in the protruding portion 21, the bending cavity 212 is a rectangular parallelepiped cavity, and one end of the insertion hole 211, which is far away from the protruding portion 21, is communicated with an inner surface of the bending cavity 212, which is close to the insertion hole 211. The inner surface of the bending cavity 212 far away from the plug hole 211 is obliquely arranged towards the direction far away from the water guide hole 221, the surface of one side of the bulge part 21 far away from the opening of the plug hole 211 is provided with a filling opening 213, the opening of the filling opening 213 is rectangular, the filling opening 213 is communicated with the oblique inner surface of the bending cavity 212, and the filling opening 213 is arranged on one side of the reinforcing steel bar 12 close to the water guide hole 221.
Referring to fig. 1, when the reinforcing bricks 2 are laid, the insertion holes 211 on each reinforcing brick 2 are respectively inserted into the end portions of the reinforcing steel bars 12 on the slope body of the slope protection 1 penetrating through the concrete layer 14, so that the insertion blocks 222 between the adjacent reinforcing bricks 2 in the horizontal direction are inserted into the insertion grooves 223, and the openings of the water guide holes 221 on the reinforcing bricks 2 on the upper side face the protrusions 21 on the reinforcing bricks 2 on the lower side. Referring to fig. 2 and 5, the constructor inserts the reinforcing bricks 2 in sequence along the extending direction of the revetment 1, and the pouring openings 213 of the reinforcing bricks 2 being laid are located at the sides of the reinforcing steel bars 12 of the reinforcing bricks 2 far away from the already laid reinforcing bricks 2. In the process that the end of the reinforcing steel bar 12 is inserted into the insertion hole 211 of the reinforcing brick 2, the end of the reinforcing steel bar 12 enters the bending cavity 212 through the insertion hole 211 and abuts against the inclined inner surface of the bending cavity 212, so that the end of the reinforcing steel bar 12 is bent towards the pouring opening 213 until the end of the reinforcing steel bar 12 enters the pouring opening 213 and abuts against the inner wall of the pouring opening 213, which is close to the insertion hole 211. When the reinforcing brick 2 is firmly spliced with the reinforcing steel bar 12, the end part of the reinforcing steel bar 12 has an abutting acting force towards the direction of the already-laid reinforcing brick 2 on the inner wall of the pouring opening 213, so that the splicing of the finished reinforcing brick 2 and the already-laid reinforcing brick 2 is firm.
And S7, pouring impermeable concrete between the reinforcing brick 2 and the impermeable layer 15 to fix the reinforcing brick 2 and the impermeable layer 15, pouring part of the impermeable concrete into the bending cavity 212 through the pouring opening 213, filling the bending cavity 212 with the impermeable concrete, and sealing the bending cavity 212. Is beneficial to preventing the reinforcing steel bar 12 from being corroded, so that the connection between the reinforcing brick 2 and the reinforcing steel bar 12 is more durable.
The implementation principle of the river course revetment paving construction method for the hydraulic engineering is as follows: form metalling 13 and concrete layer 14 on the river course bank protection 1 in proper order, 1 domatic earth of bank protection has been completely cut off, and the setting of reinforcing bar 12, make have between concrete layer 14 and the bank protection 1 along 1 domatic limiting displacement of bank protection, make the connection between bank protection 1 and the concrete layer 14 more firm, and the setting of reinforcing brick 2, river and the rainwater of scour concrete layer 14 have the hindrance effect, and the impact that reinforcing brick 2 received transmits to 1 inside of bank protection through reinforcing bar 12, thereby river and rainwater scour are reduced and the erosion effect on bank protection 1 surface is prevented the soil erosion on bank protection 1 surface.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A river course revetment paving construction method for hydraulic engineering is characterized by comprising the following steps: the method comprises the following steps:
s1, forming reinforcing holes (11) on the slope surface of the revetment (1);
s2, inserting reinforcing steel bars (12) into the reinforcing holes (11) so that one ends of the reinforcing steel bars (12) are positioned outside the reinforcing holes (11), and binding the reinforcing steel bars by using steel wires so that the positions of the reinforcing steel bars are fixed;
s3, pouring concrete into the reinforcing holes (11) to pour and fix the reinforcing steel bars (12) and the revetment (1), and then removing the steel wires for bundling the reinforcing steel bars (12);
s4, paving broken stones on the slope surface of the protection slope (1) to form a broken stone layer (13) arranged in parallel to the slope surface of the protection slope (1);
s5, pouring concrete on the gravel layer (13) to form a concrete layer (14), and pouring impermeable concrete on the concrete layer (14) after the concrete layer (14) is cured to form an impermeable layer (15);
s6, paving the reinforcing bricks (2), and inserting and fixing the reinforcing bricks (2) and the reinforcing steel bars (12) at the end parts penetrating through the reinforcing holes (11);
and S7, pouring impermeable concrete between the reinforcing brick (2) and the impermeable layer (15) so as to fix the reinforcing brick (2) and the impermeable layer (15).
2. The river course revetment paving construction method for the hydraulic engineering according to claim 1, characterized in that: the reinforcing brick (2) comprises a bulge part (21) which is bulged upwards along the slope surface of the protection slope (1) and water guide parts (22) arranged on two sides of the bulge part (21); the water guide part (22) is arc-shaped and strip-shaped, one end of the water guide part (22) is connected with the bulge part (21), the other end of the water guide part extends along the slope surface of the protection slope (1), and the arc of the water guide part (22) surrounds the circle center and is positioned on the upper side of the water guide part (22).
3. The river course revetment paving construction method for the hydraulic engineering according to claim 2, characterized in that: the reinforcing bricks (2) are provided with a plurality of groups, the reinforcing bricks (2) are arranged from top to bottom along the slope surface of the revetment (1), and the reinforcing bricks (2) in the same group are sequentially connected and arranged along the extending direction of the revetment (1); the two water guide parts (22) which are adjacent in the horizontal direction are in inserted fit.
4. The river course revetment paving construction method for hydraulic engineering according to claim 3, wherein: the water guide part (22) is provided with a water guide hole (221), and the opening of the water guide hole (221) at the bottom of the reinforced brick (2) faces to the bulge part (21) at the lower side of the reinforced brick (2).
5. The river course revetment paving construction method for the hydraulic engineering according to claim 1, characterized in that: the surface of the reinforcing brick (2) connected with the impermeable layer (15) is provided with an insertion hole (211) for inserting the reinforcing steel bar (12), a bending cavity (212) communicated with the insertion hole (211) is formed in the reinforcing brick (2), and the inner surface of the bending cavity (212) far away from the insertion hole (211) is obliquely arranged.
6. The river course revetment paving construction method for hydraulic engineering according to claim 5, wherein: the surface of the reinforced brick (2) far away from the impermeable layer (15) is provided with a pouring opening (213) communicated with the bending cavity (212); in step S7, a part of impermeable concrete is poured into the bending cavity (212) through the pouring opening (213), so that the bending cavity (212) is sealed.
7. The river course revetment paving construction method for hydraulic engineering according to claim 6, wherein: the inclined inner surface of the bending cavity (212) is inclined towards the pouring opening (213).
8. The river course revetment paving construction method for hydraulic engineering according to claim 7, wherein: in step S6, the reinforcing bricks (2) are sequentially inserted along the extending direction of the revetment (1), and the filling openings (213) on the reinforcing bricks (2) being laid are located on the side of the reinforcing steel bars (12) on the reinforcing bricks (2) far away from the laid reinforcing bricks (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010865132.6A CN111926775A (en) | 2020-08-25 | 2020-08-25 | River course slope protection laying construction method for hydraulic engineering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010865132.6A CN111926775A (en) | 2020-08-25 | 2020-08-25 | River course slope protection laying construction method for hydraulic engineering |
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| CN111926775A true CN111926775A (en) | 2020-11-13 |
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| CN202010865132.6A Pending CN111926775A (en) | 2020-08-25 | 2020-08-25 | River course slope protection laying construction method for hydraulic engineering |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215010A (en) * | 2022-01-04 | 2022-03-22 | 浙江富江水利水电工程有限公司 | Dam slope protection structure and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215010A (en) * | 2022-01-04 | 2022-03-22 | 浙江富江水利水电工程有限公司 | Dam slope protection structure and construction method thereof |
| CN114215010B (en) * | 2022-01-04 | 2023-08-25 | 浙江富江建设集团有限公司 | Dam slope protection structure and construction method thereof |
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Application publication date: 20201113 |