CN111058469A - Impervious wall structure and ecological seepage-control solid bed system - Google Patents
Impervious wall structure and ecological seepage-control solid bed system Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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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
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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
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
- E02B3/123—Flexible prefabricated covering elements, e.g. mats, strips mainly consisting of stone, concrete or similar stony material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0071—Wood
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- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Ocean & Marine Engineering (AREA)
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Abstract
The invention discloses an ecological seepage control solid bed system and an impervious wall structure, wherein the impervious wall structure comprises a low seepage interception structure and an exposed wall structure. The underground seepage interception structure is inserted into a side slope of the river channel along the width direction of the river channel, so that the river bed is stabilized, the river bed is prevented from being cut downwards, the underground seepage interception structure comprises a plurality of seepage interception pieces, one end of each seepage interception piece, which is far away from the water surface of the river channel, is formed on a watertight layer or a foundation layer of the river channel, and each seepage interception piece extends to the height of the normal water level of the river channel along the water level rising direction, so that the seepage-proof layer laying facilities adopted for the river channel along the line are avoided, and the damage to the river channel matrix or the original ecological environment due to the addition; the exposed wall structure and one end, close to the riverway water surface, of the underground seepage intercepting structure are connected and arranged, and the exposed wall structure is exposed out of the riverway normal water level along the water level rising direction. The development requirement of the riparian vegetation is met, and a certain landscape water body is built.
Description
Technical Field
The invention relates to the technical field of river protection, in particular to an impervious wall structure and an ecological seepage-control solid bed system.
Background
In the construction of a steep slope river channel, a fixed bed structure is often required to be constructed for stabilizing a river bed and increasing the longitudinal stability of the river due to the serious river undercutting. The traditional bed fixing tool mainly takes a concrete stone beam as a main part and is mainly used for reinforcing a riverbed to prevent a river from undercutting, so that the effects of soil fixation and sand protection are achieved. Meanwhile, in order to ensure river seepage prevention, a layer of seepage prevention material, such as concrete bottom protection, geomembrane seepage prevention, clay blanket and the like, is usually paved above a river bed.
With the development of urban construction, many mountain-type steep slope riverways often need to have various functions such as flood control, ecology, landscape and the like in urban water system treatment, and are required to maintain river stability as much as possible on the premise of keeping certain flood control safety, and meet the requirements of improving local water environment and building water landscape. However, the above-mentioned solid bed structure is generally laid on the shallow layer or surface of the river bed, and because of its water-permeable structure, it has no water-retaining and seepage-controlling function and has no function of raising groundwater level. The arrangement of the impermeable material also hinders the communication and the material exchange between the river water body and the matrix, thereby blocking the vertical connectivity of the river bed and causing the deterioration of the river habitat.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that the fixed bed structure in the prior art is arranged on the shallow layer or the surface of the riverbed, has no water retention and seepage control function and has no function of improving the groundwater level. The arrangement of the anti-seepage material also hinders the communication and the material exchange between the river water body and the matrix, thereby blocking the vertical connectivity of the river bed to cause the defect of river habitat degradation, and simultaneously, the prior river channel construction can not meet the requirements of the landscape function in the urban water system treatment.
To this end, the present invention provides an impervious wall structure comprising:
the underground seepage interception structure is inserted into a side slope of the river channel along the width direction of the river channel, the underground seepage interception structure comprises a plurality of seepage interception pieces, one end of each seepage interception piece, which is far away from the water surface of the river channel, is formed on a watertight layer or a basement layer of the river channel, and each seepage interception piece extends to the height of the normal water level of the river channel along the rising direction of the water level;
and the exposure wall structure is connected with one end, close to the riverway water surface, of the underground seepage intercepting structure, and is exposed out of the riverway normal water level along the water level ascending direction.
Optionally, in the above diaphragm wall structure, the seepage stopping member comprises a longitudinal seepage stopping member and a lateral plug member,
the longitudinal seepage-stopping piece is inserted into the impervious layer or the foundation layer of the river along the water level rising direction;
the lateral plug connectors are inserted into side slopes of the river channel along the water level rising direction, and the lateral plug connectors are fixedly connected with the longitudinal seepage intercepting parts through fasteners.
Optionally, in the above anti-seepage wall structure, a first included angle is formed between the axial direction of the lateral plug connector and the axial direction of the longitudinal seepage intercepting member.
Optionally, in the above diaphragm wall structure, the lateral plug connectors and the longitudinal seepage stopping pieces are arranged in a staggered manner along the water flow direction.
Optionally, in the above anti-seepage wall structure, the longitudinal seepage intercepting part and the lateral plug-in part are both made of logs.
Optionally, the above-mentioned impervious wall structure, said underground seepage-stopping structure further comprises,
and the riverbed foundation layer is arranged on the impervious bed or the foundation layer along the water level rising direction, and the seepage interception piece is covered and built on the riverbed foundation layer.
Optionally, in the above diaphragm wall structure, the cross-sectional area of the underground seepage-stopping structure along the direction parallel to the water surface of the river channel decreases along the rising direction of the water level.
Optionally, in the above barrier wall structure, the underground seepage blocking structure further includes a gravel layer disposed on the impervious layer or the foundation layer along the water level rising direction, the seepage blocking member is concrete grout, and the concrete grout permeates into an interlayer gap of the gravel layer through the grouting driving mechanism.
Optionally, in the diaphragm wall structure, the seepage stopping member is a concrete jet grouting pile.
Optionally, in the above anti-seepage wall structure, the underground seepage intercepting structure and the exposed wall structure are integrally arranged.
The utility model provides an ecological accuse ooze solid bed system, includes a plurality of foretell cutoff wall structures, cutoff wall structure sets gradually along the rivers direction in the river course.
The technical scheme provided by the invention has the following advantages:
1. the impervious wall structure provided by the invention comprises an underground seepage intercepting structure and an exposed wall structure. The underground seepage interception structure is inserted into a side slope of the river channel along the width direction of the river channel, the underground seepage interception structure comprises a plurality of seepage interception pieces, one end of each seepage interception piece, which is far away from the water surface of the river channel, is formed on a watertight layer or a foundation layer of the river channel, and each seepage interception piece extends to the height of the normal water level of the river channel along the rising direction of the water level; and the exposure wall structure is connected with one end, close to the riverway water surface, of the underground seepage intercepting structure, and is exposed out of the riverway normal water level along the water level ascending direction.
The cut-off wall structure of this structure inserts the bank slope soil body on the edge river course width direction through the underground structure of cut oozing to having stabilized the riverbed, having prevented the riverbed from undercutting, simultaneously, the setting of the piece is oozed in the cut of underground cut oozing structure, guarantees to cut the one end shaping of oozing the piece at the impervious bed or the basement rock stratum in river course, slows down the water loss of sedimentary deposit then. Due to the arrangement of the seepage-stopping piece, the seepage-preventing layer laying facilities adopted for the riverway along the line are avoided, and the riverway matrix or the original ecological environment is not damaged by adding seepage-preventing materials; simultaneously, the height of intercepting the piece keeps unanimous with river course normal water level height, and then when having guaranteed the vertical stable requirement of riverbed, properly intercepts the river course water, and the setting of the wall body that exposes further promotes the water level, satisfies the riparian zone and plants the demand of being developed, builds certain landscape water. And further, the functions of flood control, ecology, landscape and the like can be realized in various aspects aiming at the mountain area type steep slope river channel in the urban water system treatment, and under the premise of keeping certain flood control safety, the river is maintained to be stable, and the requirements of improving the local water environment and building water landscape are met.
2. The seepage-proofing wall structure provided by the invention is characterized in that the seepage-proofing piece comprises a longitudinal seepage-proofing piece and a lateral plug-in piece, wherein the longitudinal seepage-proofing piece is inserted into a water-proofing layer or a foundation layer of the river along the rising direction of the water level; the lateral plug connectors are inserted into side slopes of the river channel along the water level ascending direction, and the lateral plug connectors are fixedly connected with the seepage intercepting parts through fasteners. The setting of side direction plug connector guarantees the stability that a plurality of vertical sections that set up side by side cut the piece installation, improves the reliability that the structure installation was penetrated to the underground cut.
3. The impervious wall structure provided by the invention is directly excavated and built at the river bed construction part, and is directly arranged by adopting concrete jet grouting piles, curtain grouting and other modes, so that the simple construction process, low manufacturing cost and small damage and disturbance to the environment of the biological habitat are ensured.
4. The ecological control infiltration solid bed system provided by the invention comprises a plurality of impervious wall structures, and the impervious wall structures are sequentially arranged in the river channel along the water flow direction, so that continuous step water surfaces can be built in the river direction of the river channel, and the number of the impervious wall structures is configured according to the actual ecological requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic cross-sectional view of the ecological permeation-controlling solid bed system provided in example 1, using a longitudinal permeation-stopping member and a lateral plug-in member;
FIG. 2 is a schematic longitudinal sectional view of the ecological permeation control solid bed system provided in example 1, wherein the ecological permeation control solid bed system employs a longitudinal permeation interception member and a lateral insertion member;
FIG. 3 is a schematic cross-sectional view of the ecological seepage-control consolidated bed system provided in example 2, using masonry stones;
FIG. 4 is a schematic longitudinal sectional view of the eco-controlled consolidated bed system provided in example 2 using masonry stone;
FIG. 5 is a schematic cross-sectional view of the ecological seepage-controlling consolidated bed system provided in example 4, using a concrete jet grouting pile;
FIG. 6 is a schematic longitudinal sectional view of a concrete jet grouting pile used in the ecological seepage-control consolidated bed system provided in example 4;
description of reference numerals:
1-underground seepage-stopping structure; 111-longitudinal seepage-cutting member; 112, a lateral plug connector; 113-concrete jet grouting pile; 12-the bed base layer; 2-basal rock formation.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides an ecological control infiltration solid bed system, which comprises a plurality of anti-seepage wall structures, wherein the anti-seepage wall structures are sequentially arranged in a river channel along the water flow direction. As shown in fig. 1 and 2, the cut-off wall structure includes an underground infiltration intercepting structure 1 and an exposed wall structure. The underground seepage interception structure 1 is inserted into a side slope of a river channel along the width direction of the river channel, the underground seepage interception structure 1 is provided with a seepage interception piece, one end of the seepage interception piece, which is far away from the water surface of the river channel, is formed on a watertight layer or a basement layer 2 of the river channel, and the seepage interception piece extends to the height of the normal water level of the river channel along the rising direction of the water level; the exposure wall structure and the end, close to the river surface, of the underground seepage intercepting structure 1 are connected and arranged, and the exposure wall structure is exposed out of the normal water level of the river along the water level ascending direction. For example, the underground infiltration intercepting structure 1 is integrated with the exposed wall structure.
In the present embodiment, the seepage stopping member comprises a longitudinal seepage stopping member 111 and a lateral plug-in member 112, wherein, as shown in fig. 1 and fig. 2, the longitudinal seepage stopping member 111 is inserted into the impervious layer or the basement layer 2 of the river along the water level rising direction; the side plug 112 is inserted into the side slope of the river along the water level rising direction, and the side plug 112 is fixedly connected with the seepage-stopping piece through a fastener. The arrangement of the lateral plug connectors 112 ensures the stability of the installation of the plurality of longitudinal seepage intercepting parts 111 arranged side by side, and improves the installation reliability of the underground seepage intercepting structure 1. In this embodiment, the lateral plug-in connector 112 and the longitudinal seepage-stopping member 111 are arranged in a staggered manner along the water flow direction. The longitudinal seepage-cutting part 111 and the lateral plug-in part 112 are both made of round wood.
In this embodiment, the axial direction of the lateral plug 112 forms a first angle with the axial direction of the longitudinal penetration member 111. Specifically, the first included angle is 90 degrees. Of course, in other embodiments, the first included angle may be 30 degrees, 60 degrees, etc., as long as the side plug 112 and the longitudinal penetration member 111 are fixedly connected with each other, and the side plug 112 plays a role in fixing the longitudinal penetration member 111.
The ecological seepage control and consolidation bed system provided in the embodiment is mainly suitable for river reach with higher underground water level and lower seepage control requirement, and the specific implementation process is as follows:
firstly, designing a river longitudinal slope of a river section needing a fixed bed and determining a water surface connection mode formed after construction, and further determining construction parts and quantity; while necessary geological exploration is performed on the bed 2 or impermeable bed to determine the depth of burial. And secondly, the logs serving as the longitudinal seepage-cutting pieces 111 are sharpened and are arranged and fastened in rows between the logs serving as the lateral plug-in pieces 112 and the fastening room, so that the curve formed by connecting the longitudinal tips is the same as the curve of the impervious bed or the basement layer 2 at the river channel construction position. Then, the anti-seepage wall structure is driven into a watertight layer or a foundation layer 2 of the riverbed according to the preset embedding depth through a driving mechanism, and finally, the anti-seepage wall structure can be densely arranged in the river required by the continuous step water surface construction according to the specific requirements.
The cut-off wall structure that this embodiment provided inserts the bank slope soil body on the edge river course width direction through secret cut ooze structure 1 to having stabilized the riverbed, having prevented the riverbed undercut, simultaneously, the setting of the piece is oozed in the cut of secret cut ooze structure 1, guarantees to cut the one end shaping of oozing the piece at impervious bed or the basement rock stratum 2 in the river course, slows down the water loss of sedimentary deposit then. Due to the arrangement of the seepage-stopping piece, the seepage-preventing layer laying facilities adopted for the riverway along the line are avoided, and the riverway matrix or the original ecological environment is not damaged by adding seepage-preventing materials; simultaneously, the height of intercepting the piece keeps unanimous with river course normal water level height, and then when having guaranteed the vertical stable requirement of riverbed, properly intercepts the river course water, and the setting of the wall body that exposes further promotes the water level, satisfies the riparian zone and plants the demand of being developed, builds certain landscape water. And further, the functions of flood control, ecology, landscape and the like can be realized in various aspects aiming at the mountain area type steep slope river channel in the urban water system treatment, and under the premise of keeping certain flood control safety, the river is maintained to be stable, and the requirements of improving the local water environment and building water landscape are met.
Example 2
This embodiment provides an ecological seepage-control consolidated bed system, which is different from the ecological seepage-control consolidated bed system provided in embodiment 1 in that the underground seepage-control structures 1 of the diaphragm wall structures are different: as shown in fig. 3 and 4, specifically, the underground infiltration blocking structure 1 in this embodiment includes a bed foundation layer 12 provided on the impermeable layer or the bedrock layer 2 in the water level rising direction, in addition to the infiltration blocking member, and the infiltration blocking member is laid on the bed foundation layer 12, for example, the infiltration blocking member may be concrete grout, and the concrete grout is mixed with the bed foundation layer 12 to form a grout stone. The cross-sectional area of the underground seepage intercepting structure 1 along the parallel direction of the water surface of the river course is reduced along the rising direction of the water level. For example, the impervious wall structure is formed of masonry stone, and the thickness of the impervious wall structure can be 400mm-600mm, wherein the thickness of the basement layer 2 or the impervious layer can be thickened on the basis of the original thickness, so that the stability of the underground infiltration intercepting structure 1 on the side close to the basement layer 2 is ensured.
Example 3
The present embodiment provides an ecological seepage-control consolidated bed system, which is different from the ecological seepage-control consolidated bed system provided in embodiment 1 or embodiment 2 in that the underground seepage-interception structure 1 of the diaphragm wall structure is different: the river bed foundation layer 12 in example 2 is defined as gravel, and may be directly laid by curtain grouting, for example, the seepage-stopping member may be concrete grout, and the concrete grout penetrates into the interlayer space of the gravel by driving of the grouting driving mechanism, thereby realizing curtain grouting.
Example 4
This example provides an ecological cementation bed control system, which is different from the ecological cementation bed control system provided in any one of examples 1 to 3 in that: the underground seepage interception structure 1 in this embodiment is different, as shown in fig. 5 and fig. 6, in this embodiment, the seepage interception member directly adopts a concrete jet grouting pile 113. The concrete implementation mode is that firstly, a drilling slurry drilling machine is used for drilling holes at a construction position, then a rotary spraying machine is inserted into the construction position, and the prepared concrete slurry is sprayed out from a nozzle of a grouting pipe through a high-pressure generating device; the drilling promotes the drilling rod of rig while rotating particularly, when beginning to spray the grout operation, according to the demand of required shaping jet grouting pile, confirms the lifting speed and the rotation rate of filling pipe, drives the rotatory promotion of sprinkling irrigation after the whitewashing for concrete thick liquid and former soil mass intensive mixing mix, and form the jet grouting pile of predetermineeing the diameter in the soil mass, stop the whitewashing when the jet grouting pile forms the length of settlement, form the jet grouting pile after the wait of stewing. And forming a plurality of concrete jet grouting piles 113 to be formed by the same method. The concrete jet grouting pile 113 is directly processed on the basis of the original riverbed, so that the construction difficulty is greatly reduced, the damage to the ecological environment of the original riverbed land is reduced, and the damage and disturbance to the environment of the biological habitat are small. It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. An impervious wall structure is characterized by comprising
The underground seepage interception structure (1) is inserted into a side slope of a river channel along the width direction of the river channel, the underground seepage interception structure (1) comprises a plurality of seepage interception pieces, one end, far away from the water surface of the river channel, of each seepage interception piece is formed on a water-impermeable layer or a foundation layer (2) of the river channel, and each seepage interception piece extends to the height of the normal water level of the river channel along the rising direction of the water level;
and the exposure wall structure is connected with one end, close to the water surface of the river, of the underground seepage intercepting structure (1), and is exposed out of the normal water level of the river along the water level rising direction.
2. Diaphragm wall construction, according to claim 1, characterised in that said interception element comprises a longitudinal interception element (111) and a lateral splicing element (112),
the longitudinal seepage-stopping piece (111) is inserted into the impervious layer or the basement layer (2) of the river along the water level rising direction;
the side plug connector (112) is inserted into the side slope of the river channel along the water level ascending direction, and the side plug connector (112) is fixedly connected with the longitudinal seepage intercepting part (111) through a fastener.
3. The impervious wall structure according to claim 2,
the axial direction of the lateral plug connector (112) and the axial direction of the longitudinal seepage-cutting part (111) form a first included angle.
4. The impervious wall structure according to claim 3,
the lateral plug connectors (112) and the longitudinal seepage cutting pieces (111) are arranged in a staggered mode along the water flow direction.
5. The impervious wall structure according to claim 3,
the longitudinal seepage-cutting piece (111) and the lateral plug-in piece (112) are both round woods.
6. The cutoff wall structure according to claim 1, wherein the underground cutoff structure (1) further comprises,
and the riverbed foundation layer (12) is arranged on the impervious layer or the foundation layer (2) along the water level rising direction, and the seepage interception piece covers and is built on the riverbed foundation layer (12).
7. The diaphragm wall structure of claim 6, wherein the cross-sectional area of the underground structure (1) in the direction parallel to the water surface of the river is reduced in the direction of the water level.
8. The impervious wall structure according to claim 1,
the underground seepage intercepting structure (1) further comprises a gravel layer arranged on the impervious layer or the foundation layer (2) along the rising direction of the water level, the seepage intercepting part is concrete grout, and the concrete grout permeates into gaps between the gravel layer through the grouting driving mechanism.
9. The diaphragm wall structure of claim 1, wherein the seepage prevention member is a concrete jet grouting pile (113).
10. The impermeabilization wall structure according to claim 1, wherein said underground structure (1) is integral with said exposed wall structure.
11. An ecological seepage-control solid bed system is characterized by comprising
A plurality of the barrier wall structures of any one of claims 1 to 10, which are arranged in the river channel in sequence in the direction of water flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204237.0A CN111058469A (en) | 2019-11-29 | 2019-11-29 | Impervious wall structure and ecological seepage-control solid bed system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911204237.0A CN111058469A (en) | 2019-11-29 | 2019-11-29 | Impervious wall structure and ecological seepage-control solid bed system |
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| CN111058469A true CN111058469A (en) | 2020-04-24 |
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| CN201911204237.0A Pending CN111058469A (en) | 2019-11-29 | 2019-11-29 | Impervious wall structure and ecological seepage-control solid bed system |
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| CN115467290A (en) * | 2022-10-25 | 2022-12-13 | 成都市市政工程设计研究院有限公司 | Ecological bed fixing piece, testing device and testing method thereof |
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