CN109555086B - Rock-fill dam peripheral seam structure and construction method - Google Patents
Rock-fill dam peripheral seam structure and construction method Download PDFInfo
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- CN109555086B CN109555086B CN201910026315.6A CN201910026315A CN109555086B CN 109555086 B CN109555086 B CN 109555086B CN 201910026315 A CN201910026315 A CN 201910026315A CN 109555086 B CN109555086 B CN 109555086B
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- dam
- dam body
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- seam
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- 230000002093 peripheral effect Effects 0.000 title claims abstract description 40
- 238000010276 construction Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002131 composite material Substances 0.000 claims description 23
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 14
- 239000010426 asphalt Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 239000002023 wood Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 abstract description 6
- 210000004906 toe nail Anatomy 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
-
- 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
- E02B3/16—Sealings or joints
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Road Paving Structures (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a rock-fill dam peripheral seam structure and a construction method, wherein the structure comprises the following steps: the dam body panel is paved on the outer side of the filled rock-fill body, and the surface of the dam body panel is provided with a preset slope; the toe board is arranged along the edge of the outer side of the dam body panel, the outer side of the toe board is connected with the mountain body and the bedrock, the peripheral seam between the inner side of the toe board and the dam body panel is a step seam, the step seam is formed by sequentially and alternately connecting a plurality of transverse seams and a plurality of longitudinal seams, the transverse seams horizontally extend, the longitudinal seams vertically extend, and the transverse seams and the longitudinal seams are vertical to the surface of the dam body panel; the water stopping member is provided at the lateral joint and the longitudinal joint. The peripheral seam structure of the rock-fill dam is convenient for the construction of the dam body panel, and can basically eliminate the shearing deflection at the peripheral seam between the dam body panel and the toe board, so that only two forms of expanding deflection and sinking deflection are left, and the waterproof reliability of the water stopping component between the dam body panel and the toe board of the rock-fill dam is improved.
Description
Technical Field
The invention belongs to the technical field of dam design and construction, and particularly relates to a rock-fill dam peripheral joint structure and a construction method.
Background
The concrete rockfill dam is a closed and complete seepage-proof system formed by grouting a dam body panel at the upper part of the dam and curtain grouting at the lower part of the toe board, and a corresponding water stopping structure is needed to be adopted for peripheral seams between the toe board and the dam body panel. The lower supporting foundation of the toe board and the lower supporting foundation of the dam body panel are different, the toe board is generally located on bedrock, the lower part of the dam body panel is filled with a rock-fill body, the deformation mechanism difference of the toe board and the dam body panel is large, the peripheral seam generates large deformation under the action of water pressure, and the deformation size of the peripheral seam and the reliability of the water stopping structure directly influence the safety of the dam. At present, the toe board is generally obliquely crossed with the dam body panel, so that the peripheral seam displacement condition between the toe board and the dam body panel is complex, and under the action of water pressure, the shearing, sinking and expanding displacement values of the peripheral seam are larger, so that the seepage prevention performance of the dam is not facilitated.
Disclosure of Invention
In view of this, it is an object of the present invention to overcome the above problems or at least partially solve or alleviate them. Provides a rock-fill dam peripheral seam structure and a construction method.
The technical scheme adopted for solving the technical problems is as follows: proposed is a rock-fill dam peripheral seam structure comprising: the dam comprises a dam body panel, toe boards and water stopping members, wherein the dam body panel is paved on the outer side of a filled rock-fill body, and the surface of the dam body panel is provided with a preset inclination; the toe board is arranged along the edge of the outer side of the dam body panel, the outer side of the toe board is connected with a mountain and bedrock, a peripheral seam between the inner side of the toe board and the dam body panel is a step seam, the step seam is sequentially connected in a staggered manner by a plurality of transverse seams and a plurality of longitudinal seams, the transverse seams horizontally extend, the longitudinal seams vertically extend, and the transverse seams and the longitudinal seams are vertical to the surface of the dam body panel; the water stop member is disposed at the lateral joint and the longitudinal joint.
According to the rock-fill dam circumferential seam structure of the present invention, the stepped seam between the dam body panel and the toe board is formed of a plurality of transverse seams and a plurality of longitudinal seams which are sequentially staggered. The lower edges of the dam body panels are in a regular shape by the transverse joints and the longitudinal joints, so that the dam body panels are convenient to construct. And the dam body panel and the toe board can resist the longitudinal shearing deflection between the dam body panel and the toe board at the transverse joint, and can resist the transverse shearing deflection between the dam body panel and the toe board at the transverse joint. The two forms of open deflection and subsidence deflection are left, the deformation of the peripheral seam is reduced, and the waterproof reliability of the water stopping component between the dam body panel and the toe board of the rock-fill dam is improved.
The rock-fill dam peripheral seam structure of the present invention also has the following optional features.
Optionally, the water stop member comprises a copper water stop disposed at the inner ends of the transverse seam and the longitudinal seam.
According to the rock-fill dam peripheral seam structure, the copper water stop pad is arranged at the inner ends of the transverse seam and the longitudinal seam between the dam body panel and the toe board, and the copper water stop pad is provided with the 180-degree turning part at the peripheral seam between the dam body panel and the toe board, can cope with deformation, and can tightly block water seepage at the inner side of the dam body panel.
Optionally, a rubber gasket is arranged on the inner side of the copper water stop.
According to the peripheral seam structure of the rock-fill dam, the rubber gasket which is arranged on the inner side of the copper water stop can isolate the contact between water seepage and the copper water stop, and has an antirust effect on the copper water stop.
Optionally, the water stop member comprises a bitumen wood board filled in the transverse joint and in the longitudinal joint.
According to the rock-fill dam peripheral seam structure, asphalt wood boards are filled in the transverse seams and the longitudinal seams, and the asphalt wood boards can expand after absorbing water and can tightly seal the transverse seams and the longitudinal seams.
Optionally, the water stop member comprises a composite rubber rod disposed at the outer ports of the transverse seam and the longitudinal seam.
According to the rock-fill dam peripheral seam structure, the outer ends of the transverse seam and the longitudinal seam are V-shaped openings, and the composite rubber rod is filled in the V-shaped openings, so that the contact area between the composite rubber rod and two sides of the peripheral seam can be increased, and the tightness of the composite rubber rod is improved.
Optionally, the outer ends of the transverse seam and the longitudinal seam are covered with cover plates, and two sides of the cover plates are respectively fixed on the dam body panel and the toe board through connecting pieces.
According to the peripheral seam structure of the rock-fill dam, the cover plate is made of metal, is paved along the transverse seam and the longitudinal seam in the step seam, two sides of the cover plate are respectively lapped on the dam body panel and the toe board and are fixed through expansion screws, and then the edge of the cover plate is sealed by using the sealing agent.
Optionally, a plastic filler is filled between the cover plate and the composite rubber rod.
According to the construction requirements of the toenail, firstly selecting the position of the longitudinal edge of the inner side edge of the toenail, then supplementing the position of the transverse edge, wherein the longitudinal edge is perpendicular to the axis of the dam, the transverse edge is parallel to the axis of the dam, forming a step-shaped edge according to the connection of the longitudinal edge and the transverse edge to perform corresponding foundation excavation, and manufacturing a template to pour concrete to form the toenail;
after filling the dam body, placing a rubber gasket at the joint of the dam body and the toe board, and fixing copper water stop;
filling asphalt wood boards at joints after the concrete of the toe boards reaches the design strength, pouring concrete to form dam body panels, and forming stepped peripheral joints between the dam body panels and the toe boards;
and filling a composite rubber rod in the V-shaped opening outside the peripheral seam, filling plastic filler on the upper part of the composite rubber rod, adhering the cover plate on the outer side of the plastic filler, sealing the edges of the adhered cover plate by using a sealing agent, and finally anchoring by using flat steel and expansion bolts as connecting pieces.
The invention has the beneficial effects that the lower edge of the dam body panel is in a regular shape, thereby not only facilitating the construction of the dam body panel, but also basically eliminating the shearing deflection at the peripheral seam between the dam body panel and the toe board, and only leaving two forms of expanding deflection and sinking deflection. The waterproof reliability of the water stopping component between the dam body panel and the toe board of the rock-fill dam is improved, and the problem that the peripheral seam of the ultra-high panel rock-fill dam with the size of more than 200m is overlarge can be solved.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a schematic view of an embodiment of a peripheral seam construction of a rock-fill dam of the present invention;
FIG. 2 is a schematic cross-sectional view of the structure at A-A in FIG. 1;
fig. 3 is a schematic cross-sectional structure at B-B in fig. 1.
In the above figures: 1. a toe board; 2. a dam body panel; 3. a transverse seam; 4. a longitudinal seam; 5. a dam axis; 6. copper water stopping; 7. a rubber gasket; 8. a composite rubber rod; 9. a cover plate; 10. a connecting piece; 11. and (3) plastic filler.
Detailed Description
Referring to fig. 1, according to an embodiment of a rock-fill dam circumferential seam structure of the present invention, the rock-fill dam circumferential seam structure of the present invention includes a dam body panel 2, a toe board 1 and a water stopping member, the dam body panel 2 is laid on the outside of a filled rock-fill body, and the surface of the dam body panel 2 has a predetermined slope; the toe board 1 is arranged along the edge of the outer side of the dam body panel 2, the outer side of the toe board 1 is connected with a mountain body and bedrock, and a step seam between the dam body panel 2 and the toe board 1 is formed by a plurality of transverse seams 3 and a plurality of longitudinal seams 4 which are sequentially connected in a staggered manner. The transverse joint 3 and the longitudinal joint 4 are sequentially connected in a staggered manner, the transverse joint 3 is parallel to the dam axis 5, the longitudinal joint 4 is perpendicular to the dam axis 5, and the transverse joint 3 and the longitudinal joint 4 are perpendicular to the surface of the dam body panel 2; the lower edge of the dam body panel 2 is in a regular shape, so that the construction of the dam body panel 2 is facilitated, and the shearing deflection at the peripheral seam between the dam body panel 2 and the toe board 1 can be basically eliminated, so that only two forms of opening deflection and sinking deflection are left. The waterproof reliability of the water stopping component between the dam body panel 2 and the toe board 1 of the rock-fill dam is improved, and the problem that the peripheral seam of the ultra-high concrete face rock-fill dam with the size of more than 200m is excessively deformed can be solved.
Referring to fig. 2 and 3, according to an embodiment of the present invention, the water stopping member includes a copper water stop 6, the copper water stop 6 is padded at inner ends of the lateral joint 3 and the longitudinal joint 4 between the dam body panel 2 and the toe board 1, the copper water stop 6 has a 180 degree turn-back portion at a peripheral joint between the dam body panel 2 and the toe board 1, and can cope with deformation and can closely block water seepage at an inner side of the dam body panel 2.
Referring to fig. 2 and 3, according to an embodiment of the present invention, the inside of the copper water stop 6 is provided with a rubber gasket 7. The rubber gasket 7 can isolate the contact between the water seepage and the copper water stop 6, and has an antirust effect on the copper water stop 6.
According to one embodiment of the invention, the water stop member comprises a bitumen wood board (not shown in the figures) filled in the transverse joints 3 and in the longitudinal joints 4. The asphalt board expands after absorbing water, and can tightly seal the transverse joint 3 and the longitudinal joint 4.
Referring to fig. 2 and 3, according to an embodiment of the present invention, the water stop member includes a composite rubber rod 8, and the composite rubber rod 8 is disposed at outer ports of the transverse joint 3 and the longitudinal joint 4. The outer ends of the transverse joint 3 and the longitudinal joint 4 are V-shaped openings, the composite rubber rod 8 is filled in the V-shaped openings, the contact area between the composite rubber rod 8 and the two sides of the peripheral joint can be increased, and the tightness of the composite rubber rod 8 is improved.
Referring to fig. 2 and 3, according to one embodiment of the present invention, the outer ends of the lateral and longitudinal joints 3 and 4 are covered with cover sheets 9, and both sides of the cover sheets 9 are fixed to the dam body panels 2 and the toe boards 1, respectively, by means of connectors 10. The cover plate 9 is made of metal, is paved along the transverse joint 3 and the longitudinal joint 4 in the step joint, two sides of the cover plate 9 are respectively lapped on the dam body panel 2 and the toe board 1 and are fixed through expansion screws, and then the edge of the cover plate 9 is sealed by using a sealing agent.
Referring to fig. 2 and 3, according to one embodiment of the invention, a plastic filler 11 is filled between the cover sheet 9 and the composite rubber rod 7. The plastic filler 11 may press the composite rubber rod 8 onto the transverse seam 3 and onto the longitudinal seam 4, the plastic filler 11 functioning to fill the gap between the cover sheet 9 and the composite rubber rod 8, any plastic filler 11 being filled, and the plastic fillers 11 are not specifically shown herein.
The construction process of the above embodiment of the rock-fill dam peripheral joint structure of the present invention is as follows:
according to the building requirements of the toe board 1, firstly selecting the position of the longitudinal edge of the inner side edge of the toe board 1, then supplementing the position of the transverse edge, wherein the longitudinal edge is perpendicular to the dam axis 5, the transverse edge is parallel to the dam axis 5, corresponding foundation excavation is carried out according to the step-shaped edge formed by connecting the longitudinal edge and the transverse edge, and casting concrete is produced by a template to form the toe board 1.
After filling the dam body, a rubber gasket 7 is placed at the joint position with the toe board 1, and the copper water stop 6 is fixed.
After the concrete of the toe board 1 reaches the design strength, filling asphalt wood boards at the joints, pouring concrete to form a dam body panel 2, and forming a stepped peripheral joint between the dam body panel 2 and the toe board 1.
The V-shaped opening outside the peripheral seam is filled with a composite rubber rod 8, then the upper part of the composite rubber rod 8 is filled with plastic filler 11, then a cover plate 9 is stuck on the outer side of the plastic filler 11, each edge of the stuck cover plate 8 is sealed by using a sealing agent, and finally flat steel and expansion bolts are used as connecting pieces 10 for anchoring.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (5)
1. A rock-fill dam perimeter joint structure, comprising:
the dam body panel (2) is paved on the outer side of the filled rock-fill body, and the surface of the dam body panel (2) is provided with a preset inclination;
the toe board (1), the toe board (1) is arranged along the edge of the outer side of the dam body panel (2), the outer side of the toe board (1) is connected with a mountain and bedrock, a peripheral seam between the inner side of the toe board (1) and the dam body panel (2) is a step seam, the step seam is formed by sequentially connecting a plurality of transverse seams (3) and a plurality of longitudinal seams (4) in a staggered manner, the transverse seams (3) are parallel to a dam axis (5), the longitudinal seams (4) are perpendicular to the dam axis (5), and the transverse seams (3) and the longitudinal seams (4) are perpendicular to the surface of the dam body panel (2);
a water stop member provided at the transverse seam (3) and at the longitudinal seam (4);
the water stop member comprises a copper water stop (6), and the copper water stop (6) is arranged at the inner ends of the transverse joint (3) and the longitudinal joint (4); the water stop member comprises an asphalt plank filled in the transverse joint (3) and in the longitudinal joint (4); the water stop member comprises a composite rubber rod (8), and the composite rubber rod (8) is arranged at the outer ports of the transverse joint (3) and the longitudinal joint (4).
2. A rockfill dam circumferential seam structure according to claim 1, wherein the inside of the copper water stop (6) is provided with a rubber gasket (7).
3. A rockfill dam circumferential seam construction according to claim 1, wherein the outer ends of the transverse seams (3) and the longitudinal seams (4) are covered with cover sheets (9), the cover sheets (9) being fastened on both sides to the dam body panels (2) and the toe boards (1) by means of connectors (10), respectively.
4. A rockfill dam circumferential seam structure according to claim 3, wherein plastic filler (11) is filled between the cover sheet (9) and the composite rubber rod (8).
5. A method of constructing a peripheral seam construction for a rock-fill dam according to any one of claims 1 to 4, wherein the position of the longitudinal edge of the inner side edge of the toe board is selected according to the construction requirements of the toe board, and then the position of the transverse edge is supplemented, the longitudinal edge is perpendicular to the dam axis, the transverse edge is parallel to the dam axis, the corresponding foundation excavation is performed according to the step-like edge formed by the connection of the longitudinal edge and the transverse edge, and the cast-in-place concrete is made to form the toe board;
after filling the dam body, placing a rubber gasket at the joint of the dam body and the toe board, and fixing copper water stop;
filling asphalt wood boards at joints after the concrete of the toe boards reaches the design strength, pouring concrete to form dam body panels, and forming stepped peripheral joints between the dam body panels and the toe boards;
and filling a composite rubber rod in the V-shaped opening outside the peripheral seam, filling plastic filler on the upper part of the composite rubber rod, adhering the cover plate on the outer side of the plastic filler, sealing the edges of the adhered cover plate by using a sealing agent, and finally anchoring by using flat steel and expansion bolts as connecting pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026315.6A CN109555086B (en) | 2019-01-11 | 2019-01-11 | Rock-fill dam peripheral seam structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026315.6A CN109555086B (en) | 2019-01-11 | 2019-01-11 | Rock-fill dam peripheral seam structure and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN109555086A CN109555086A (en) | 2019-04-02 |
| CN109555086B true CN109555086B (en) | 2024-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910026315.6A Active CN109555086B (en) | 2019-01-11 | 2019-01-11 | Rock-fill dam peripheral seam structure and construction method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760462A (en) * | 2005-11-13 | 2006-04-19 | 中国水电顾问集团华东勘测设计研究院 | Waterstop structure of peripheral joint of rock fill dam with face slab, and construction method |
| CN101748708A (en) * | 2009-12-23 | 2010-06-23 | 中国水电顾问集团华东勘测设计研究院 | 4.5 or 4m type high concrete panel loose rock dam toe board structure and job practices thereof |
| CN103590369A (en) * | 2013-12-03 | 2014-02-19 | 深圳市城市优筑科技有限公司 | Waterproof structure of concrete face rockfill dam joint and construction process |
| CN105297680A (en) * | 2015-11-29 | 2016-02-03 | 中国水利水电科学研究院 | Antiseismic design method of impervious body of 200 m high concrete face rockfill dam |
| CN209652881U (en) * | 2019-01-11 | 2019-11-19 | 中国电建集团西北勘测设计研究院有限公司 | Rock-fill dams periphery crack structure |
-
2019
- 2019-01-11 CN CN201910026315.6A patent/CN109555086B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760462A (en) * | 2005-11-13 | 2006-04-19 | 中国水电顾问集团华东勘测设计研究院 | Waterstop structure of peripheral joint of rock fill dam with face slab, and construction method |
| CN101748708A (en) * | 2009-12-23 | 2010-06-23 | 中国水电顾问集团华东勘测设计研究院 | 4.5 or 4m type high concrete panel loose rock dam toe board structure and job practices thereof |
| CN103590369A (en) * | 2013-12-03 | 2014-02-19 | 深圳市城市优筑科技有限公司 | Waterproof structure of concrete face rockfill dam joint and construction process |
| CN105297680A (en) * | 2015-11-29 | 2016-02-03 | 中国水利水电科学研究院 | Antiseismic design method of impervious body of 200 m high concrete face rockfill dam |
| CN209652881U (en) * | 2019-01-11 | 2019-11-19 | 中国电建集团西北勘测设计研究院有限公司 | Rock-fill dams periphery crack structure |
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| CN109555086A (en) | 2019-04-02 |
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