CN218436906U - Underwater pouring solid bed sand blocking dam structure - Google Patents
Underwater pouring solid bed sand blocking dam structure Download PDFInfo
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- CN218436906U CN218436906U CN202222641719.6U CN202222641719U CN218436906U CN 218436906 U CN218436906 U CN 218436906U CN 202222641719 U CN202222641719 U CN 202222641719U CN 218436906 U CN218436906 U CN 218436906U
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Abstract
The utility model belongs to the technical field of sand blocking dams, and discloses an underwater pouring solid bed sand blocking dam structure, which comprises a dam body arranged along the cross section of a riverbed; the dam body comprises a first prefabricated surrounding baffle part positioned on the upstream side and a second prefabricated surrounding baffle part positioned on the downstream side, a forming space is formed between the first prefabricated surrounding baffle part and the second prefabricated surrounding baffle part, and a concrete interlayer is cast in the forming space; the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are connected with the concrete interlayer into a whole through embedded components. The utility model discloses utilize the precast concrete piece to replace and pour the template and carry out solid bed sand blocking dam construction, build by laying bricks or stones and form first prefabrication and enclose fender portion and the prefabricated fender portion that encloses of second to can make to form the concrete intermediate layer and enclose fender portion and the prefabricated fender portion that encloses of second as an organic whole of pouring back through pre-buried component, not only reduce the foundation ditch drainage cost during the structure shaping like this, still reduced underwater concrete pouring quality risk, accelerated construction cycle.
Description
Technical Field
The utility model belongs to the technical field of the sand blocking dam, concretely relates to pour solid bed sand blocking dam structure under water.
Background
With the development of society, the demand of capital construction engineering on sand, gravel and other materials is continuously increased, and due to the step development of rivers, the source of upstream bed load is reduced due to the construction of each step reservoir, and many hydraulic and hydroelectric engineering face the situation that the downstream riverbed is cut. The downstream water level caused by the downcut of the downstream riverbed changes the downstream boundary of the original engineering energy dissipation facility to a certain extent, so that the energy dissipation of the downlet water flow is insufficient, the riverbed at the tail end of the roman is further scoured, even the related buildings such as the upstream roman and the stilling basin are damaged, and the safety of the upstream building is further threatened. Building a fixed bed sand dam along the riverbed is a relatively common and effective riverbed stabilizing measure.
The solid bed sand dam is mainly arranged along the cross section of a riverbed, and the top of the structure of the solid bed sand dam is generally flush with the riverbed or slightly higher than the riverbed, so cofferdam drainage construction is generally adopted in the construction of the solid bed sand dam. However, in areas with abundant hydraulic resources represented by the southwest area of China, rivers generally develop deep covering layers, the stratum engineering property is poor, underground water is abundant, conventional concrete pouring is difficult to realize in the construction of the fixed bed sand retaining dam, and even if the underwater concrete pouring is carried out, the problems that formwork erection is difficult and pouring quality is difficult to control exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a solid bed of pouring under water sand blocking dam structure not only can reduce the foundation ditch drainage cost during the structure shaping, still makes the underwater concrete placement quality risk reduce for the construction cycle of solid bed sand blocking dam on the riverbed.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an underwater pouring solid bed sand blocking dam structure comprises dam bodies distributed along the cross section of a riverbed;
the dam body comprises a first prefabricated enclosing part positioned on the upstream side and a second prefabricated enclosing part positioned on the downstream side, a forming space is formed between the first prefabricated enclosing part and the second prefabricated enclosing part, and a concrete interlayer is cast in the forming space;
the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are connected with the concrete interlayer into a whole through embedded components.
In a possible implementation manner, the pre-buried component includes a plurality of pre-buried in the first pre-buried connecting piece of the first prefabricated fender portion of enclosing and a plurality of pre-buried second pre-buried connecting piece of the second prefabricated fender portion of enclosing, every first pre-buried connecting piece all have connect in the first reservation end in the concrete interlayer, every second pre-buried connecting piece all have connect in the second reservation end in the concrete interlayer.
In a possible implementation manner, the first prefabricated enclosing and blocking part is formed by building a plurality of first prefabricated concrete blocks along the width direction of the upstream side, and the second prefabricated enclosing and blocking part is formed by building a plurality of second prefabricated concrete blocks along the width direction of the upstream side;
the first precast concrete block is pre-embedded with a plurality of first pre-embedded connecting pieces, and the second precast concrete block is pre-embedded with a plurality of second pre-embedded connecting pieces.
In a possible implementation manner, among the plurality of first precast concrete blocks of the first precast retaining wall, the plurality of first foundation concrete blocks are divided into a plurality of first foundation concrete blocks and a plurality of first structural layer concrete blocks, the plurality of first foundation concrete blocks are laid along the width direction of the upstream side to form a foundation of the upstream side of the dam, and the plurality of first structural layer concrete blocks are laid on the foundation of the upstream side of the dam along the width direction of the upstream side to form a structural layer of the downstream side of the dam;
and the second precast concrete blocks of the second precast surrounding part are divided into a plurality of second base concrete blocks and a plurality of second structure layer concrete blocks, the second base concrete blocks are laid along the width direction of the downstream side to form a base on the downstream side of the dam body, and the second structure layer concrete blocks are laid on the base on the downstream side of the dam body along the width direction of the downstream side to form a structure layer on the downstream side of the dam body.
In a possible implementation manner, a base on the upstream side of the dam body is perpendicular to the structural layer, so that the cross section of the first prefabricated enclosing part is of an L-shaped structure; and the base at the downstream side of the dam body is vertical to the structural layer, so that the section of the second prefabricated enclosing part is also in an L-shaped structure.
In a possible implementation manner, the first base concrete block and the first structural layer concrete block of the first prefabricated enclosing and blocking part are constructed in a flush mode, and the second base concrete block and the second structural layer concrete block of the second prefabricated enclosing and blocking part are constructed in a flush mode.
In a possible implementation manner, the first prefabricated surrounding baffle part and the second prefabricated surrounding baffle part are equal or unequal in height;
when the heights of the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are equal, masonry seams of the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are distributed in an aligned mode;
when the heights of the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are not equal, the masonry joints of the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are distributed in a staggered mode, and the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part have the height difference of 0.2-0.5 m.
In a possible implementation mode, when the height of the first prefabricated surrounding blocking part is not equal to that of the second prefabricated surrounding blocking part, the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are built with at least two structural layers.
In a possible implementation manner, the first embedded connecting piece is a first embedded joint bar, one end of the first embedded joint bar, which is located outside the first precast concrete block, constitutes the first reserved end, the first reserved end has a first reserved length, and the first reserved length is less than or equal to the thickness of the concrete interlayer;
the second embedded connecting piece is a second embedded joint bar, the second embedded joint bar is located at one end outside the second precast concrete block to form a second reserved end, the second reserved end is provided with a second reserved length, and the second reserved length is smaller than or equal to the thickness of the concrete interlayer.
In a possible implementation mode, drain holes distributed along the upstream direction and the downstream direction are reserved in the first prefabricated surrounding blocking portion and the second prefabricated surrounding blocking portion, and drain pipes penetrating through the concrete interlayer are arranged in the drain holes.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a pour solid bed sand blocking dam structure under water, utilize the precast concrete piece to replace and pour the template and carry out the construction of solid bed sand blocking dam, build by laying bricks or stones and form the prefabricated fender portion that encloses of first prefabricated fender portion of enclosing and second, and can make and form the concrete intermediate layer after pouring and enclose fender portion and the prefabricated fender portion of enclosing of first prefabricated and second and be connected as an organic wholely through pre-buried component, the foundation ditch drainage cost during the structure shaping has not only been reduced like this, concrete placement quality risk under water has still been reduced, can also accelerate the construction cycle of solid bed sand blocking dam on the riverbed simultaneously.
Drawings
Fig. 1 is a schematic cross-sectional view of a structure of an underwater pouring solid bed sand dam according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a first foundation concrete block of an underwater concrete poured solid bed sand dam structure according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of a first structural layer concrete of an underwater pouring solid bed sand dam structure according to an embodiment of the present application;
fig. 4 is a schematic perspective view of an implementation structure of an underwater pouring solid bed sand dam structure according to an embodiment of the present application;
FIG. 5 is a top and elevation view of the embodiment of FIG. 4;
fig. 6 is a schematic perspective view of another embodiment of a structure of an underwater pouring solid bed sand dam according to an embodiment of the present disclosure;
fig. 7 is a top view and an elevation view of the embodiment shown in fig. 6.
In the figure: 1-a first prefabricated containment portion; 11-a first structural layer concrete block; 12-a first foundation concrete block; 13-first embedded joint bar; 14-a drain hole; 2-second prefabricated surrounding baffle part; 21-a second structural layer concrete block; 22-a second foundation concrete block; 23-second embedded joint bars; 3-concrete interlayer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 7, an embodiment of the present application provides an underwater pouring solid bed sand dam structure, including a dam body arranged along a cross section of a river bed; the dam body comprises a first prefabricated surrounding baffle part 1 positioned on the upstream side and a second prefabricated surrounding baffle part 2 positioned on the downstream side, a forming space is formed between the first prefabricated surrounding baffle part 1 and the second prefabricated surrounding baffle part 2, and a concrete interlayer 3 is cast in place in the forming space; the first prefabricated surrounding blocking part 1 and the second prefabricated surrounding blocking part 2 are connected with the concrete interlayer 3 into a whole through embedded components.
Wherein, first prefabricated fender portion 1 and the prefabricated fender portion 2 of enclosing of second are for prefabricated the formation, and it forms with the form such as piling up to be built by laying bricks or stones including dividing it into a plurality of prefabricated part, also includes whole prefabrication. The first prefabricated retaining wall portion 1 and the second prefabricated retaining wall portion 2 are located on the upstream side and the downstream side respectively, a forming space can be formed between the first prefabricated retaining wall portion 1 and the second prefabricated retaining wall portion 2 at intervals in a manner similar to cofferdam construction, concrete can be cast in place in the forming space, and the concrete can be formed into the concrete interlayer 3. The concrete interlayer 3 is connected with the first prefabricated enclosing part 1 and the second prefabricated enclosing part 2 into a whole through the embedded components, so that the prefabricated parts and the cast-in-place parts can be connected into a whole, and a firm solid bed sand dam structure is formed. Due to the enclosing and blocking effects of the first prefabricated enclosing and blocking part 1 and the second prefabricated enclosing and blocking part 2, the underwater concrete pouring quality risk can be greatly reduced on the inner side, the water quantity entering the inner side is also reduced, the risk is small compared with the existing dam cast in situ through a template, and the construction period is shorter.
Through foretell technical scheme, not only reducible structure foundation ditch drainage cost during shaping, still reduced underwater concrete placement quality risk, can also accelerate the construction cycle of solid bed sand dam on the riverbed simultaneously.
In an embodiment, the pre-buried component includes that a plurality of is pre-buried in the pre-buried connecting piece of the first pre-buried connecting piece of fender portion 1 and a plurality of pre-buried second in the pre-buried connecting piece of fender portion 2 of second enclose, every first pre-buried connecting piece all have connect in the first reservation end in the concrete interlayer 3, every pre-buried connecting piece of second all have connect in the second reservation end in the concrete interlayer 3.
The first pre-buried connecting piece that fender portion 1 was enclosed in first prefabrication can realize through first reservation end being connected with concrete interlayer 3, and the second pre-buried connecting piece that fender portion 2 was enclosed in the second prefabrication can realize through second reservation end being connected with concrete interlayer 3, and the three can be connected as a whole from this, and is more firm. In the specific implementation process, the embedded connecting piece can be a steel bar, or can be other existing connecting pieces which can play a role in connecting and enhance firmness, and is not limited.
Further, in order to enable the first prefabricated surrounding baffle part 1 and the second prefabricated surrounding baffle part 2 to be more convenient to transport and assemble, the first prefabricated surrounding baffle part 1 is formed by building a plurality of first prefabricated concrete blocks along the width direction of the upstream side, and the second prefabricated surrounding baffle part 2 is formed by building a plurality of second prefabricated concrete blocks along the width direction of the upstream side; the first precast concrete block is pre-embedded with a plurality of first pre-embedded connecting pieces, and the second precast concrete block is pre-embedded with a plurality of second pre-embedded connecting pieces.
Furthermore, among the plurality of first precast concrete blocks of the first precast fence 1, a plurality of first foundation concrete blocks 12 and a plurality of first structural layer concrete blocks 11 are divided, the plurality of first foundation concrete blocks 12 are laid in the upstream width direction to form a foundation on the upstream side of the dam, and the plurality of first structural layer concrete blocks 11 are laid in the upstream width direction on the foundation on the upstream side of the dam to form a structural layer on the downstream side of the dam; the second precast concrete blocks of the second precast surrounding and blocking part 2 are divided into a plurality of second foundation concrete blocks 22 and a plurality of second structural layer concrete blocks 21, the second foundation concrete blocks 22 are laid along the downstream side width direction to form a foundation on the downstream side of the dam, and the second structural layer concrete blocks 21 are laid on the foundation on the downstream side of the dam along the downstream side width direction to form a structural layer on the downstream side of the dam.
Wherein, the first base concrete piece 12 of first prefabricated fender portion 1 of enclosing can be built by laying bricks or stones and form the base of dam body upstream side, and the base can play the effect of basis for the dam body that forms is more stable, and the structural layer that first structural layer concrete piece 11 built by laying bricks or stones and form, the structural layer can play the effect of enclosing the fender, so that the better pouring that carries on concrete interlayer 3, and on the same principle, the second is prefabricated encloses fender cloth and also does so.
In order to enable the structure of the dam body to be more reasonable and stable, in the specific implementation process, a base on the upstream side of the dam body is perpendicular to a structural layer, so that the cross section of the first prefabricated enclosing part 1 is of an L-shaped structure; and a base on the downstream side of the dam body is vertical to the structural layer, so that the section of the second prefabricated enclosing part 2 is also in an L-shaped structure.
Specifically, the first base concrete block 12 and the first structural layer concrete block 11 of the first prefabricated enclosing part 1 are constructed by flush joint construction, and the second base concrete block 22 and the second structural layer concrete block 21 of the second prefabricated enclosing part 2 are constructed by flush joint construction. Therefore, the first prefabricated surrounding blocking part 1 and the second prefabricated surrounding blocking part 2 can be built more reasonably, and production and construction of standard blocks can be conveniently realized.
In some embodiments, the first prefabricated containment portion 1 and the second prefabricated containment portion 2 have equal or unequal heights.
When the heights of the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are equal, masonry joints of the first prefabricated surrounding blocking part 1 and the second prefabricated surrounding blocking part 2 are distributed in an aligned mode. The structure is used for the condition that the elevations of the upstream and downstream building base surfaces of the structure are consistent, the splicing seams of the transverse and longitudinal precast concrete blocks of the dam body are consistent, and the structure is suitable for low sand dams.
When the heights of the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are unequal, masonry joints of the first prefabricated surrounding blocking part 1 and the second prefabricated surrounding blocking part 2 are distributed in a staggered mode, and the height difference of 0.2-0.5m is formed between the first prefabricated surrounding blocking part 1 and the second prefabricated surrounding blocking part 2. The structure is used for the condition that the elevations of the foundation surfaces of the upstream and the downstream of the structure are not consistent, the height difference of 0.2-0.5m can be set according to actual requirements, and the splicing seams of the transverse precast concrete blocks and the longitudinal precast concrete blocks of the dam body are staggered with each other, so that the structure is suitable for the sand retaining dam with a higher dam body.
Aiming at the situation of inconsistent elevation, further, when the height of the first prefabricated surrounding retaining part 1 is not equal to that of the second prefabricated surrounding retaining part 2, the first prefabricated surrounding retaining part 1 and the second prefabricated surrounding retaining part 2 are built with at least two structural layers. By arranging a plurality of structural layers, preferably 2-3 layers, namely 2-3 longitudinal first structural layer concrete blocks 11 and second structural layer concrete blocks 21, the dam body has higher enclosure capacity. In the concrete implementation process, the thickness and the height of the concrete interlayer 3 on the inner side are correspondingly increased, and the concrete interlayer can be cast in place in parts.
In a preferred embodiment of the embedded connectors, the first embedded connectors are first embedded joint bars 13, one ends of the first embedded joint bars 13, which are located outside the first precast concrete block, form first reserved ends, the first reserved ends have first reserved lengths, and the first reserved lengths are less than or equal to the thickness of the concrete interlayer 3; the second embedded connecting piece is a second embedded joint bar 23, the end, outside the second precast concrete block, of the second embedded joint bar 23 forms a second reserved end, the second reserved end has a second reserved length, and the second reserved length is smaller than or equal to the thickness of the concrete interlayer 3.
Therefore, the steel bars are used as the embedded connecting pieces, so that the cost can be reduced, and meanwhile, the steel bars can also have better connecting performance.
In a specific implementation process, drain holes 14 distributed along the upstream direction and the downstream direction are reserved in the first prefabricated surrounding blocking part 1 and the second prefabricated surrounding blocking part 2, and drain pipes penetrating through the concrete interlayer 3 are arranged in the drain holes 14. Therefore, the water pressure balance of the upstream and the downstream of the dam body can be maintained through the drainage structure, the drainage holes 14 are reserved in the prefabrication of the first structural layer concrete block 11 and the second structural layer concrete block 21, and the drainage pipe is placed in the dam body in advance before the underwater concrete of the dam body is cast in place and then construction pouring is carried out.
Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an it builds solid bed sand dam structure under water which characterized in that: comprises a dam body arranged along the cross section of a riverbed;
the dam body comprises a first prefabricated surrounding baffle part (1) positioned on the upstream side and a second prefabricated surrounding baffle part (2) positioned on the downstream side, a forming space is formed between the first prefabricated surrounding baffle part (1) and the second prefabricated surrounding baffle part (2), and a concrete interlayer (3) is cast in place in the forming space;
the first prefabricated surrounding blocking part (1) and the second prefabricated surrounding blocking part (2) are connected with the concrete interlayer (3) into a whole through embedded components.
2. The underwater pouring solid bed sand dam structure as claimed in claim 1, wherein: the embedded member includes that a plurality of is pre-buried in the first pre-buried connecting piece of first prefabricated fender portion (1) and a plurality of pre-buried in the pre-buried connecting piece of second fender portion (2) of enclosing, every first pre-buried connecting piece all have connect in first reservation end in concrete interlayer (3), every pre-buried connecting piece of second all have connect in second reservation end in concrete interlayer (3).
3. The underwater pouring solid bed sand dam structure as claimed in claim 2, wherein: the first prefabricated enclosing and blocking part (1) is formed by building a plurality of first prefabricated concrete blocks along the width direction of the upstream side, and the second prefabricated enclosing and blocking part (2) is formed by building a plurality of second prefabricated concrete blocks along the width direction of the upstream side;
the first precast concrete block is pre-embedded with a plurality of first pre-embedded connecting pieces, and the second precast concrete block is pre-embedded with a plurality of second pre-embedded connecting pieces.
4. The underwater pouring solid bed sand dam structure according to claim 3, characterized in that: the first precast concrete blocks of the first precast retaining wall part (1) are divided into a plurality of first base concrete blocks (12) and a plurality of first structural layer concrete blocks (11), the plurality of first base concrete blocks (12) are laid along the width direction of the upstream side to form a base of the upstream side of the dam body, and the plurality of first structural layer concrete blocks (11) are laid on the base of the upstream side of the dam body along the width direction of the upstream side to form a structural layer of the downstream side of the dam body;
and the second precast concrete blocks of the second precast surrounding part (2) are divided into a plurality of second base concrete blocks (22) and a plurality of second structural layer concrete blocks (21), the second base concrete blocks (22) are laid along the width direction of the downstream side to form a base of the downstream side of the dam, and the second structural layer concrete blocks (21) are laid on the base of the downstream side of the dam along the width direction of the downstream side to form a structural layer of the downstream side of the dam.
5. The underwater pouring solid bed sand dam structure as claimed in claim 4, wherein: the base on the upstream side of the dam body is perpendicular to the structural layer, so that the cross section of the first prefabricated enclosing part (1) is of an L-shaped structure; and the base at the downstream side of the dam body is vertical to the structural layer, so that the cross section of the second prefabricated enclosing part (2) is also in an L-shaped structure.
6. The underwater pouring solid bed sand dam structure as claimed in claim 5, wherein: the prefabricated retaining wall is characterized in that a first base concrete block (12) of the first prefabricated retaining wall (1) and a first structural layer concrete block (11) are formed by laying flush joints, and a second base concrete block (22) of the second prefabricated retaining wall (2) and a second structural layer concrete block (21) are formed by laying flush joints.
7. The structure of any one of claims 3 to 5, wherein: the first prefabricated surrounding baffle part (1) and the second prefabricated surrounding baffle part (2) are equal or unequal in height;
when the heights of the first prefabricated surrounding baffle part and the second prefabricated surrounding baffle part are equal, masonry joints of the first prefabricated surrounding baffle part and the second prefabricated surrounding baffle part are distributed in an aligned mode;
when the heights of the first prefabricated surrounding blocking part and the second prefabricated surrounding blocking part are unequal, masonry joints of the first prefabricated surrounding blocking part (1) and the second prefabricated surrounding blocking part (2) are distributed in a staggered mode, and the height difference of 0.2-0.5m is formed between the first prefabricated surrounding blocking part (1) and the second prefabricated surrounding blocking part (2).
8. The underwater pouring solid bed sand dam structure as claimed in claim 7, wherein: when the height of the first prefabricated surrounding blocking part (1) is not equal to that of the second prefabricated surrounding blocking part (2), the first prefabricated surrounding blocking part (1) and the second prefabricated surrounding blocking part (2) are built with at least two structural layers.
9. The underwater pouring solid bed sand dam structure according to claim 3, characterized in that: the first embedded connecting piece is a first embedded joint bar (13), one end of the first embedded joint bar (13) positioned outside the first precast concrete block forms a first reserved end, the first reserved end has a first reserved length, and the first reserved length is smaller than or equal to the thickness of the concrete interlayer (3);
the second embedded connecting piece is a second embedded joint bar (23), the second embedded joint bar (23) is located at one end outside the second precast concrete block to form a second reserved end, the second reserved end is provided with a second reserved length, and the second reserved length is smaller than or equal to the thickness of the concrete interlayer (3).
10. The underwater pouring solid bed sand dam structure according to claim 1, characterized in that: the first prefabricated surrounding blocking part (1) and the second prefabricated surrounding blocking part (2) are reserved with drain holes (14) distributed along the upstream direction and the downstream direction, and drain pipes penetrating through the concrete interlayer (3) are arranged in the drain holes (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202222641719.6U CN218436906U (en) | 2022-10-08 | 2022-10-08 | Underwater pouring solid bed sand blocking dam structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222641719.6U CN218436906U (en) | 2022-10-08 | 2022-10-08 | Underwater pouring solid bed sand blocking dam structure |
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| CN218436906U true CN218436906U (en) | 2023-02-03 |
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| CN202222641719.6U Active CN218436906U (en) | 2022-10-08 | 2022-10-08 | Underwater pouring solid bed sand blocking dam structure |
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