CN218969919U - Asphalt concrete face rockfill dam arrangement structure - Google Patents
Asphalt concrete face rockfill dam arrangement structure Download PDFInfo
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- CN218969919U CN218969919U CN202222373957.3U CN202222373957U CN218969919U CN 218969919 U CN218969919 U CN 218969919U CN 202222373957 U CN202222373957 U CN 202222373957U CN 218969919 U CN218969919 U CN 218969919U
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Abstract
The utility model provides an arrangement structure of an asphalt concrete face rockfill dam, wherein an upstream face of a rockfill body of the rockfill dam is impermeable by adopting an asphalt concrete face plate, and the asphalt concrete face plate is divided into a bottom arc section, a plane section and a top arc section from bottom to top; the tail ends of the bottom arc sections are connected with the concrete structure by adopting a sliding anti-seepage lap joint connection mode; the rock-fill dam is characterized in that water retaining and seepage-proofing closed structures are arranged at two ends of the dam tops of the two low-water-head sections, the water retaining and seepage-proofing closed structures are connected with the bottom circular arc section and the top circular arc section in an extrusion mode, and the connection areas of the water retaining and seepage-proofing closed structures, the bottom circular arc section and the top circular arc section are divided into extrusion joint areas. The utility model adopts the scheme of arc transition connection and the scheme of extrusion type joints at two ends of a dam body, and solves the connection problem of an asphalt concrete panel and two banks and the anti-seepage connection problem of an end asphalt concrete panel pinch-out area.
Description
Technical Field
The utility model relates to the field of reservoir water retaining engineering, in particular to an asphalt concrete face rockfill dam arrangement structure.
Background
Asphalt concrete has excellent anti-seepage performance and deformation performance, and is widely used as an anti-seepage structure in water retaining engineering, such as asphalt concrete panels and asphalt concrete core walls. The existing asphalt concrete core wall dam technology is mature and is widely applied. However, the asphalt concrete panel is applied to the full-basin seepage-proofing structure at present due to the special connection mode of the asphalt concrete panel and the basic seepage-proofing structure, and no independent research and application of an asphalt concrete panel rock-fill dam exist. Two technical problems need to be solved in the study of an independently arranged asphalt concrete faced rockfill dam independent of the concrete face of the warehouse Zhou Liqing. Firstly, the problem of seepage-proofing connection between an asphalt concrete panel and two non-horizontal toe boards on two sides is solved; and secondly, the problem of seepage-proof connection of the pinch-out areas of the asphalt concrete panels at the two ends of the dam body is solved.
Disclosure of Invention
In view of the shortcomings of the prior art, the utility model aims to provide an asphalt concrete face rockfill dam arrangement structure. The utility model adopts the arc transitional connection scheme and the dam body two-end extrusion joint scheme to solve the connection problem of the asphalt concrete panel and two banks and the anti-seepage connection problem of the pinch-out area of the end asphalt concrete panel, so that the asphalt concrete panel and the two banks and the mountain body form a closed anti-seepage system, and an independent asphalt concrete panel rock-fill dam structure is formed.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
asphalt concrete face rockfill dam arrangement structure, its characterized in that: the upstream face of the rock-fill body of the rock-fill dam is impermeable by adopting an asphalt concrete panel, and the asphalt concrete panel is divided into a bottom arc section, a plane section and a top arc section from bottom to top; the foundation of the two sides of the rock-fill dam and the riverbed is provided with consolidation and curtain grouting, the consolidation and curtain grouting are connected with an asphalt concrete panel by adopting a concrete structure, and a lap joint section (a sliding anti-seepage lap joint part between the bottom circular arc section and the concrete structure) at the tail end of the bottom circular arc section is connected with the concrete structure by adopting a sliding anti-seepage lap joint connection mode; the rock-fill dam is characterized in that water retaining and seepage-proofing closed structures are arranged at two ends of the dam tops of the two low-water-head sections, the water retaining and seepage-proofing closed structures are connected with the bottom circular arc section and the top circular arc section in an extrusion mode, and the connection areas of the water retaining and seepage-proofing closed structures, the bottom circular arc section and the top circular arc section are divided into extrusion joint areas.
Further: the bottom circular arc section adopts an anti-arc transition mode, the tail end of the bottom circular arc section adopts an impermeable layer of the lap joint section to lap joint on the upper surface of the concrete structure, and the surface of the lap joint section of the tail end of the bottom circular arc section is arranged in parallel with the surface of the lap joint part of the concrete structure.
Further: the included angle between the lap joint section at the tail end of the bottom arc section and the plane section is kept to be a fixed value or a non-fixed value; and when the included angle between the lap joint section at the tail end of the bottom arc section and the plane section is a non-constant value, the relationship that the included angle is in direct proportion to the water head of the corresponding position is followed, and the transition is uniform.
Further: the asphalt concrete panel comprises an asphalt concrete leveling adhesive layer and an asphalt concrete impermeable layer, wherein a polyester grid thickening layer is arranged at the lower part of the asphalt concrete impermeable layer of the bottom circular arc section, and an asphalt mortar wedge is arranged between the polyester grid thickening layer at the lower part of the non-lap joint section of the bottom circular arc section and the asphalt concrete leveling adhesive layer.
Further: the dam body filling area of the rock-fill dam sequentially comprises a special cushion material area, a transition material area, a main rock-fill area and a secondary rock-fill area from upstream to downstream, wherein the special cushion material area is positioned in the lower area of the bottom circular arc section.
Further: the asphalt concrete panel comprises an asphalt concrete leveling adhesive layer and an asphalt concrete impermeable layer; the lower part of the asphalt concrete impermeable layer of the extrusion joint area is provided with a polyester grid thickening layer, a fine stone asphalt-rich concrete wedge body is arranged between the polyester grid thickening layer and the asphalt concrete leveling and cementing layer, and plastic fillers are arranged between the fine stone asphalt-rich concrete wedge body and the polyester grid thickening layer, and between the fine stone asphalt-rich concrete wedge body and the water retaining and impermeable sealing structure.
Further: the extrusion type joint area is provided with a special cushion material area in an extrusion manner below the asphalt concrete panel and the fine stone asphalt-rich concrete wedge body.
Compared with the prior art, the utility model has the following advantages:
the utility model adopts the arc transitional connection scheme and the dam body two-end extrusion joint scheme to solve the connection problem of the asphalt concrete panel and two banks and the anti-seepage connection problem of the pinch-out area of the end asphalt concrete panel, so that the asphalt concrete panel and the two banks and the mountain body form a closed anti-seepage system, and an independent asphalt concrete panel rock-fill dam structure is formed.
Compared with the reinforced concrete face rockfill dam, the utility model has stronger adaptability to deformation, can improve the adaptability to poor topography geological conditions of the face rockfill dam and reduce engineering investment; the asphalt concrete panel does not need to be provided with structural joints, and the seepage-proofing performance is stronger than that of the reinforced concrete panel; compared with the existing asphalt concrete core wall dam, the anti-seepage structure of the asphalt concrete face rockfill dam is positioned on the surface, and is beneficial to maintenance in the operation period.
Drawings
FIG. 1 is a schematic diagram of a dam of the present utility model.
FIG. 2 is a schematic diagram of a dam of the present utility model.
Fig. 3 is a detailed view of the connection of the asphalt concrete panel of the present utility model to a concrete structure.
FIG. 4 is a detailed view of the connection of the asphalt concrete panel and the dam crest wave wall.
FIG. 5 is a detailed view of the connection of asphalt concrete panels on both sides of a dam crest area with a water retaining and impermeable closure structure according to the present utility model.
Fig. 6 is a partial enlarged view at a of fig. 3.
Reference numerals: 2. a concrete structure; 3. consolidation and curtain grouting; 4. a special bedding material zone; 5. a bedding material area; 6. a transition material zone; 7. a main rockfill area; 8. a secondary stone stacking area; 9. dam crest wave wall; 10. dam crest filling area and road surface; 11. a water retaining and seepage preventing sealing structure; 12. an asphalt concrete impermeable layer; 13. leveling the adhesive layer by asphalt concrete; 14. a polyester mesh thickening layer; 15. asphalt mortar wedge; 16. fine stone asphalt-rich concrete wedge; 17. a plastic filler; 18. a top arc segment; 19. a planar section; 20. a bottom arc segment; 21-lap section.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present utility model, preferred embodiments of the present utility model will be described below with reference to specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present utility model; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship described in the drawings are for illustrative purposes only and are not to be construed as limiting the utility model.
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
As shown in fig. 1 to 6, in the arrangement structure of the asphalt concrete face rockfill dam, the upstream face of the rockfill body of the rockfill dam is impervious by adopting an asphalt concrete face plate, and the asphalt concrete face plate is divided into a bottom arc section 20, a plane section 19 and a top arc section 18 from bottom to top; the foundation of the two sides and the riverbed of the rock-fill dam is subjected to foundation seepage prevention treatment by adopting consolidation and curtain grouting 3, the consolidation and curtain grouting 3 is connected with an asphalt concrete panel by adopting a concrete structure 2, and the tail end of a bottom circular arc section 20 is connected with the concrete structure 2 by adopting a lap joint section 21 (a sliding seepage prevention lap joint part between the bottom circular arc section and the concrete structure) by adopting a sliding seepage prevention lap joint connection mode; the rock-fill dam is characterized in that water retaining and seepage-proofing sealing structures 11 are arranged at two ends of the dam tops of the two low-water-head sections, the water retaining and seepage-proofing sealing structures 11 are connected with the bottom arc section 20 and the top arc section 18 in an extrusion mode, and the connection areas of the water retaining and seepage-proofing sealing structures 11, the bottom arc section 20 and the top arc section 18 are divided into extrusion joint areas.
The water retaining and impermeable closure structure 11 is a concrete retaining wall and the concrete structure 2 is a toe board or gallery which is anchored to the foundation surface with anchors. A toe board or a gallery is arranged between the consolidation and curtain grouting 3 and the bottom circular arc section 20 to serve as an impermeable connection structure, so that an independent impermeable closed asphalt concrete face rockfill dam is formed. The upstream face slope ratio of the rock-fill dam is controlled by asphalt concrete paving and rolling technologies and is generally 1:1.7-1:1.8, and the downstream slope ratio of the rock-fill dam is designed according to the dam stability and earth-rock balance requirements.
The bottom circular arc section 20 adopts an anti-arc transition mode, the tail end of the bottom circular arc section 20 adopts a lap joint section 21 to lap joint the upper surface of the concrete structure 2, and the surface of the lap joint section 21 at the tail end of the bottom circular arc section 20 is parallel to the surface of the lap joint part of the concrete structure 2. The radius of the anti-arc is comprehensively considered according to dam height, deformation conditions and the like.
The top arc section 18 is connected with the dam crest wave wall 9, and the top elevation of the top arc section 18 is higher than the normal water storage level and meets the requirements of the relevant design specifications of the earth-rock dam.
The toe plate or gallery should avoid large angle turns. For the limitation of the terrain condition, the region with larger turning angle is additionally provided with turning sections, so that the problem of local stress concentration of the panel caused by overlarge single-point turning is solved.
The included angle between the overlap section 21 at the tail end of the bottom circular arc section 20 and the plane section 19 is kept constant (the included angle is 149.5-150.9 degrees; the slope ratio of the corresponding plane section 19 is 1:1.7-1:1.8); when the included angle between the lap joint section 21 at the tail end of the bottom circular arc section 20 and the plane section 19 is a non-fixed value, the relationship that the included angle is in direct proportion to the water head of the corresponding position is followed, and the transition is uniform. The stress of the bottom lap joint part and the peripheral area thereof is evenly transited, the phenomenon of stress concentration is avoided, and the running state of the panel is improved.
The included angle between the overlap section 21 and the plane section 19 at the tail end of the bottom circular arc section 20 is calculated and controlled by adopting one of the following three spatial relations:
1. the included angle and the arc are controlled in the direction perpendicular to the axis of the dam;
2. the included angle and the arc are controlled in the direction perpendicular to the projection line of the horizontal plane of the toe board;
3. the included angle and the arc are controlled in a direction perpendicular to the toe board line.
The asphalt concrete panel comprises an asphalt concrete leveling adhesive layer 13 and an asphalt concrete impermeable layer 12, wherein a polyester grid thickening layer 14 is arranged at the lower part of the asphalt concrete impermeable layer 12 of the bottom circular arc section 20, and an asphalt mortar wedge 15 is arranged between the polyester grid thickening layer 14 at the lower part of the non-lap joint section 22 of the bottom circular arc section 20 and the asphalt concrete leveling adhesive layer 13. The asphalt concrete impermeable layer 12 in the area of the plane section 19 and the top arc section 18 and the bottom arc section 20, which is not the wedge-shaped body 4, is arranged on the outer surface of the asphalt concrete leveling adhesive layer 13.
The dam body filling partition of the rock-fill dam sequentially comprises a special cushion material region 4, a cushion material region 5, a transition material region 6, a main rock-fill region 7 and a secondary rock-fill region 8 from upstream to downstream, and through gradually transiting filling materials, the working condition of the panel is improved, and meanwhile, the high efficiency and the economy of the rock-fill dam are achieved. The special bedding material zone 4 is located in the lower region of the bottom circular arc section 20. The deformation modulus of the rock-fill dam from the upstream to the downstream is gradually decreased, and the permeability coefficient is gradually increased. The special cushion material is a stone slag material with good grading and formed by rolling breeze-fresh hard rock, the maximum particle diameter is not more than 40mm, the thin layer is rolled and filled, and the thickness of the rolling layer is 20cm. The laminated modulus is larger, so that the uneven deformation of the asphalt concrete panel at the joint part of the asphalt concrete panel and the concrete structure can be effectively reduced, and the tensile stress of the panel can be reduced.
The asphalt concrete panel comprises an asphalt concrete leveling adhesive layer 13 and an asphalt concrete impermeable layer 12; the lower part of the asphalt concrete impermeable layer 12 of the extrusion joint area is provided with a polyester grid thickening layer 14, a fine stone asphalt-rich concrete wedge 16 is arranged between the polyester grid thickening layer 14 and the asphalt concrete leveling adhesive layer 13, and a plastic filler 17 is arranged between the fine stone asphalt-rich concrete wedge 16 and the polyester grid thickening layer 14 and between the fine stone asphalt-rich concrete wedge and the water-retaining and impermeable sealing structure 11. And water stopping and seepage preventing sealing structure 11 and concrete structure 2 are water stopping and seepage preventing.
The extrusion joint zone extrudes a special bedding material zone 4 under the asphalt concrete deck and fine stone asphalt-rich concrete wedge 16.
The extrusion joint area is filled with fine stone asphalt-rich concrete to form a wedge body, SR plastic filler is arranged between the wedge body and the side concrete retaining wall and the asphalt concrete impermeable layer 12 on the surface, the surface of the green concrete impermeable layer 12 is subjected to subsidence deformation under the action of water pressure, the wedge body is extruded with the retaining wall surface arranged in the inclined dam body, the impermeable effect of a contact surface is further enhanced, and the wedge body can adapt to the existence of horizontal stretching deformation by adjusting the gradient in the inclined dam of the retaining wall. The joint can meet the working condition of settlement deformation of the joint part and avoid forming shearing stress on the panel in the low water head section under the condition of meeting the anti-seepage function.
The space turning part of the concrete structure 2 adopts arc transition, and the arc turning radius and the corner size and the turning part water head form a positive relation.
The construction method of the asphalt concrete face rockfill dam arrangement structure adopts the asphalt concrete face rockfill dam arrangement structure, and comprises the following steps:
s1: excavating foundation surfaces of two sides and a river bed part of the rock-fill dam according to design requirements;
s2: pouring a concrete structure 2, a water retaining and seepage preventing sealing structure 11 at the top end part of the rock-fill dam, and carrying out foundation consolidation and curtain grouting 3;
s3: filling a dam body according to the dam body partition until reaching the bottom elevation of the rock-fill dam top wave wall 9; in the filling process, dam face trimming is carried out once every 10-15 m, and the trimming content comprises shaping according to a design structural line, slope rolling, emulsified asphalt spraying and geotextile for preventing rain erosion;
s4: constructing a dam crest wave wall 9, a dam crest filling area and a pavement 10;
s5: preparing asphalt concrete for construction, removing a dam surface protection layer, repairing the surface, and spraying emulsified asphalt;
s6: checking and treating the concrete at the connecting part of the concrete structure 2 to eliminate sharp corners which can cause stress concentration of asphalt concrete panels;
s7: paving and rolling an asphalt concrete leveling adhesive layer 13, an asphalt mortar wedge body 15, a polyester grid thickening layer 14 and an asphalt concrete impermeable layer 12 on the bedding surface of a special bedding material area 4 at the lap joint part of the concrete structure 2 in sequence; an asphalt concrete leveling adhesive layer 13, a fine stone asphalt-rich concrete wedge 16, a plastic filler 17, a polyester grid thickening layer 14 and an asphalt concrete impermeable layer 12 are sequentially paved and rolled on the bedding surface of the bedding material area 5 of the extrusion joint area.
S8: the asphalt mastic sealing layer is coated on the surface of the asphalt concrete impermeable layer 12, triangular gaps are reserved at the joint parts of the asphalt concrete impermeable layer 12 and the concrete structures 2, and mastic is filled at the triangular gap parts reserved at the joint parts of the asphalt concrete impermeable layer 12 and the concrete structures 2.
The asphalt concrete faced rockfill dam arrangement of the present utility model is readily manufactured or used by those skilled in the art from the description of the present utility model and the accompanying drawings, and can produce the positive effects described in the present utility model.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present utility model fall within the scope of the present utility model.
Claims (7)
1. An asphalt concrete face rockfill dam arrangement structure, characterized in that: the upstream face of the rock-fill body of the rock-fill dam is impermeable by adopting an asphalt concrete panel, and the asphalt concrete panel is divided into a bottom arc section (20), a plane section (19) and a top arc section (18) from bottom to top; the foundation of the two sides of the rock-fill dam and the riverbed is provided with consolidation and curtain grouting (3), the consolidation and curtain grouting (3) is connected with an asphalt concrete panel by adopting a concrete structure (2), and the tail end of the bottom circular arc section (20) is connected with the concrete structure (2) by adopting a slip type anti-seepage lap joint connection mode by adopting a lap joint section (21); the rock-fill dam is characterized in that water retaining and seepage-proofing sealing structures (11) are arranged at two ends of the dam tops of the two low-water-head sections, the water retaining and seepage-proofing sealing structures (11) are connected with the bottom circular arc section (20) and the top circular arc section (18) in an extrusion mode, and the connection areas of the water retaining and seepage-proofing sealing structures (11) with the bottom circular arc section (20) and the top circular arc section (18) are divided into extrusion joint areas.
2. The asphalt concrete faced rockfill dam arrangement according to claim 1, wherein: the bottom circular arc section (20) adopts an anti-arc transition mode, the tail end of the bottom circular arc section (20) is lapped on the upper surface of the concrete structure (2) by adopting a lap joint section (21), and the surface of the lap joint section (21) at the tail end of the bottom circular arc section (20) is arranged in parallel with the surface of the lap joint part of the concrete structure (2).
3. The asphalt concrete faced rockfill dam arrangement according to claim 2, wherein: the included angle between the lap joint section (21) at the tail end of the bottom circular arc section (20) and the plane section (19) is kept constant or non-constant; when the included angle between the lap joint section (21) at the tail end of the bottom circular arc section (20) and the plane section (19) is an indefinite value, the relationship that the included angle is in direct proportion to the water head of the corresponding position is followed, and the transition is uniform.
4. The asphalt concrete faced rockfill dam arrangement according to claim 2, wherein: the asphalt concrete panel comprises an asphalt concrete leveling adhesive layer (13) and an asphalt concrete impermeable layer (12), wherein a polyester grid thickening layer (14) is arranged at the lower part of the asphalt concrete impermeable layer (12) of the bottom circular arc section (20), and an asphalt mortar wedge body (15) is arranged between the polyester grid thickening layer (14) at the lower part of the bottom circular arc section (20) and the asphalt concrete leveling adhesive layer (13).
5. The asphalt concrete faced rockfill dam arrangement according to claim 2, wherein: the dam body filling partition of the rock-fill dam sequentially comprises a special cushion material region (4), a cushion material region (5), a transition material region (6), a main rock-fill region (7) and a secondary rock-fill region (8) from upstream to downstream, wherein the special cushion material region (4) is positioned in the lower region of the bottom circular arc section (20).
6. The asphalt concrete faced rockfill dam arrangement according to claim 1, wherein: the asphalt concrete panel comprises an asphalt concrete leveling adhesive layer (13) and an asphalt concrete impermeable layer (12); the lower part of the asphalt concrete impermeable layer (12) of the extrusion joint area is provided with a polyester grid thickening layer (14), a fine stone asphalt-rich concrete wedge body (16) is arranged between the polyester grid thickening layer (14) and the asphalt concrete leveling adhesive layer (13), and a plastic filler (17) is arranged between the fine stone asphalt-rich concrete wedge body (16) and the polyester grid thickening layer (14) and between the water retaining and impermeable sealing structure (11).
7. The asphalt concrete faced rockfill dam arrangement of claim 6, wherein: the extrusion joint area is provided with a special cushion material area (4) in an extrusion way below the asphalt concrete panel and the fine stone asphalt-rich concrete wedge body (16).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222373957.3U CN218969919U (en) | 2022-09-05 | 2022-09-05 | Asphalt concrete face rockfill dam arrangement structure |
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| CN202222373957.3U CN218969919U (en) | 2022-09-05 | 2022-09-05 | Asphalt concrete face rockfill dam arrangement structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404820A (en) * | 2022-09-05 | 2022-11-29 | 中国电建集团华东勘测设计研究院有限公司 | Asphalt concrete panel rock-fill dam arrangement structure and construction method |
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2022
- 2022-09-05 CN CN202222373957.3U patent/CN218969919U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404820A (en) * | 2022-09-05 | 2022-11-29 | 中国电建集团华东勘测设计研究院有限公司 | Asphalt concrete panel rock-fill dam arrangement structure and construction method |
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