CN108301384B - Joint structure of asphalt concrete core wall and dam foundation concrete impervious wall - Google Patents
Joint structure of asphalt concrete core wall and dam foundation concrete impervious wall Download PDFInfo
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- CN108301384B CN108301384B CN201810321773.8A CN201810321773A CN108301384B CN 108301384 B CN108301384 B CN 108301384B CN 201810321773 A CN201810321773 A CN 201810321773A CN 108301384 B CN108301384 B CN 108301384B
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- wall
- dam foundation
- asphalt concrete
- concrete core
- concrete
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- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 66
- 239000004567 concrete Substances 0.000 title claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000007704 transition Effects 0.000 claims description 23
- 238000011144 upstream manufacturing Methods 0.000 claims description 20
- 238000007596 consolidation process Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 6
- 239000011435 rock Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000010426 asphalt Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
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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
- E02B3/16—Sealings or joints
-
- 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
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/40—Foundations for dams across valleys or for dam constructions
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Building Environments (AREA)
- Revetment (AREA)
Abstract
The invention relates to the field of water conservancy and hydropower earth and rockfill dam structures, in particular to an asphalt concrete core wall and dam foundation concrete impervious wall joint structure which can effectively improve the stress deformation defect of an asphalt concrete core wall rockfill dam foundation impervious wall, thereby greatly improving the impervious performance of a dam body. The invention has reasonable and reliable structure, can improve the integral seepage-proofing capability of the rock-fill dam body, and has the advantages of simple structure and simple and convenient construction. The invention is especially suitable for the construction structure of the hydroelectric earth-rock dam structure.
Description
Technical Field
The invention relates to the field of water conservancy and hydropower earth-rock dam structures, in particular to a joint structure of an asphalt concrete core wall and a dam foundation concrete impervious wall.
Background
The earth core rock-fill dam is a dam widely used in domestic and external water conservancy and hydropower engineering, and the asphalt concrete core rock-fill dam on the deep-thickness covering layer is generally in a form that an asphalt concrete core wall is directly butted with a dam foundation impervious wall. When in actual use, the dead weight load of the asphalt concrete core wall directly acts on the dam foundation concrete impervious wall, so that the problem of stress deformation of the dam foundation concrete impervious wall is outstanding, and along with the increase of the dam height, the stress of the dam foundation concrete impervious wall is also increased until the strength grade requirement of the concrete impervious wall is exceeded, thereby limiting the dam height of the asphalt concrete core wall rock-fill dam built on the covering layer. When the engineering is positioned on the ultra-deep covering layer with the fine particles as the main materials, the problem of dam foundation settlement deformation is more remarkable, the uneven deformation of the dam foundation and the accumulated settlement of the dam foundation are large, the deformation and the stress of the asphalt concrete core wall rock-fill dam body and the dam foundation are complex, and the stress deformation of the impervious wall is remarkable. At present, no better method for solving the problems is available.
Disclosure of Invention
The invention aims to solve the technical problem of providing the joint structure of the asphalt concrete core wall and the dam foundation concrete impervious wall, which can effectively improve the stress deformation defect of the dam foundation impervious wall of the asphalt concrete core wall rock-fill dam, thereby greatly improving the impervious performance of the dam.
The technical scheme adopted for solving the technical problems is as follows: the asphalt concrete core wall and dam foundation concrete impervious wall joint structure comprises an asphalt concrete core wall and a dam foundation concrete impervious wall, wherein the asphalt concrete core wall and the dam foundation concrete impervious wall are arranged in a staggered mode along the flowing direction of water flow, the asphalt concrete core wall is arranged on the upstream section of the water flow, the dam foundation concrete impervious wall is arranged on the downstream section of the water flow, and the asphalt concrete core wall and the dam foundation concrete impervious wall are connected through flexible asphalt concrete.
Further, a concrete cushion seat structure with a grouting gallery is arranged at the bottom of the asphalt concrete core wall.
Further, the base of the asphalt concrete core wall is provided with at least one grouting hole.
Further, an upstream transition layer structure is arranged on the upstream side of the asphalt concrete core wall.
Further, the upstream side of the upstream transition layer structure is provided with a rock-fill region.
Further, a downstream transition layer structure is arranged on the downstream side of the dam foundation concrete impervious wall.
Further, a rock-fill area is arranged on the downstream side of the downstream transition layer structure.
Further, a reverse drainage layer structure is arranged on the downstream side of the downstream transition layer structure.
Further, a foundation between the upstream transition layer structure and the downstream transition layer structure is provided with a consolidation grouting structure.
Further, a cushion structure is arranged below the flexible asphalt concrete, and a pourable material layer is arranged below the cushion structure.
The beneficial effects of the invention are as follows: according to the invention, by combining with the actual space arrangement characteristics, the asphalt concrete core wall and the dam foundation concrete impervious wall are arranged in a staggered manner, so that the problem of stress prominence caused by deformation and stress combination superposition of the asphalt concrete core wall and the dam foundation concrete impervious wall is solved. The added flexible asphalt concrete solves the problem of uneven deformation of the asphalt concrete core wall and the dam foundation concrete impervious wall. The size of the concrete base can be adjusted according to specific conditions due to the advantages of the structure of the invention, and the problem of stress prominence of the traditional asphalt base is solved. The invention has reasonable and reliable structure, can improve the integral seepage-proofing capability of the rock-fill dam body, and has the advantages of simple structure and simple and convenient construction. The invention is especially suitable for the construction structure of the hydroelectric earth-rock dam structure.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Marked in the figure as: asphalt concrete core wall 1, dam foundation concrete impervious wall 2, flexible asphalt concrete 3, rockfill area 4, upstream transition layer structure 5, downstream transition layer structure 6, cushion layer structure 7, reverse filtering drainage layer structure 8, consolidation grouting structure 9, concrete cushion seat structure 11, grouting holes 12 and pourable layer 13.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The joint structure of the asphalt concrete core wall and the dam foundation concrete impervious wall shown in fig. 1 comprises an asphalt concrete core wall 1 and a dam foundation concrete impervious wall 2, wherein the asphalt concrete core wall 1 and the dam foundation concrete impervious wall 2 are arranged in a staggered mode along the flow direction of water flow, the asphalt concrete core wall 1 is arranged on the upstream section of the water flow, the dam foundation concrete impervious wall 2 is arranged on the downstream section of the water flow, and the asphalt concrete core wall 1 and the dam foundation concrete impervious wall 2 are connected through flexible asphalt concrete 3.
In actual use, as shown in fig. 1, the direction from the left side to the right side in fig. 1 is the water flow direction, that is, the left side in fig. 1 is the upstream section, and the right side in fig. 1 is the downstream section. Due to the fact that the asphalt concrete core wall 1 and the dam foundation concrete impervious wall 2 are arranged in a staggered mode along the water flow direction, the problem of stress protrusion caused by deformation and stress combination superposition of the asphalt concrete core wall 1 and the dam foundation concrete impervious wall 2 is solved, under the structural design, the asphalt concrete core wall 1 is not directly butted with the dam foundation concrete impervious wall 2 any more, and therefore dead weight load of the asphalt concrete core wall 1 is prevented from directly acting on the dam foundation concrete impervious wall 2. In actual construction, the top structure of the dam foundation concrete impervious wall 2 can be made into a slope dome shape, so that the vertical load on the dam foundation concrete impervious wall 2 is reduced, and the stress and deformation of the dam foundation concrete impervious wall 2 are further reduced. On the premise of ensuring stability and safety of the dam body, the invention can greatly improve the stress states of the dam foundation concrete impervious wall 2, the asphalt concrete core wall 1 and the concrete base structure 11, effectively improve the deep foundation impervious effect and the dam impervious safety, and has simple and reasonable structure and convenient construction.
In order to facilitate the safety detection and the later anti-seepage reinforcement of the joint structure, the following scheme can be selected: the bottom of the asphalt concrete core wall 1 is provided with a concrete cushion structure 11 with a built-in grouting gallery and a castable layer 13 on the downstream side. As shown in fig. 1, the concrete pad structure 11 can facilitate the later operation of the seepage-proofing reinforcing grouting. Further, at least one grouting hole 12 is formed in the base of the asphalt concrete core wall 1, so that corresponding grouting operation is facilitated.
In addition, in order to ensure that the overall structure is more stable and reliable, an upstream transition layer structure 5 may be optionally disposed on the upstream side of the asphalt concrete core 1, and a rock-fill region 4 may be disposed on the upstream side of the upstream transition layer structure 5, and a rock-fill region 4 may be disposed on the downstream side of the downstream transition layer structure 6. Likewise, it is also possible to optionally provide a downstream transition layer structure 6 on the downstream side of the dam foundation concrete cut-off wall 2, and a reverse drainage layer structure 8 on the downstream side of the downstream transition layer structure 6.
In general, it is preferable that the foundation between the upstream transition layer structure 5 and the downstream transition layer structure 6 is provided with a consolidation grouting structure 9 so as to ensure the stability of the overall structure, in addition, a cushion structure 7 may be further arranged below the flexible asphalt concrete 3, and a castable layer 13 is arranged below the cushion structure 7 so as to further improve and optimize the seepage-proofing performance of the structure.
According to the invention, by combining with the actual space arrangement characteristics, the asphalt concrete core wall and the dam foundation concrete impervious wall are arranged in a staggered manner, so that the problem of stress prominence caused by deformation and stress combination superposition of the asphalt concrete core wall and the dam foundation concrete impervious wall is solved. The added flexible asphalt concrete solves the problem of uneven deformation of the asphalt concrete core wall and the dam foundation concrete impervious wall. The size of the concrete base can be adjusted according to specific conditions due to the advantages of the structure of the asphalt base, the problem of stress prominence of the traditional asphalt base is solved, and the asphalt base has very wide market popularization prospect.
Claims (10)
1. Asphalt concrete core wall and dam foundation concrete diaphragm wall joint structure, including asphalt concrete core wall (1) and dam foundation concrete diaphragm wall (2), its characterized in that: the asphalt concrete core wall (1) and the dam foundation concrete impervious wall (2) are staggered along the flowing direction of water flow, wherein the asphalt concrete core wall (1) is arranged at the upstream section of the water flow, the dam foundation concrete impervious wall (2) is arranged at the downstream section of the water flow, and the asphalt concrete core wall (1) and the dam foundation concrete impervious wall (2) are connected through flexible asphalt concrete (3); the top structure of the dam foundation concrete impervious wall (2) is in a slope dome shape, so that the vertical load on the dam foundation concrete impervious wall (2) is reduced.
2. The asphalt concrete core wall and dam foundation concrete cut-off wall joint structure of claim 1, wherein: the bottom of the asphalt concrete core wall (1) is provided with a concrete cushion seat structure (11) with a grouting gallery.
3. The asphalt concrete core and dam foundation concrete cut-off wall joint structure according to claim 1 or 2, wherein: the base of the asphalt concrete core wall (1) is provided with at least one grouting hole (12).
4. The asphalt concrete core wall and dam foundation concrete cut-off wall joint structure of claim 1, wherein: an upstream transition layer structure (5) is arranged on the upstream side of the asphalt concrete core wall (1).
5. The asphalt concrete core wall and dam foundation concrete cut-off wall joint structure of claim 4, wherein: the upstream side of the upstream transition layer structure (5) is provided with a rock-fill area (4).
6. The asphalt concrete core wall and dam foundation concrete cut-off wall joint structure of claim 4, wherein: and a downstream transition layer structure (6) is arranged on the downstream side of the dam foundation concrete impervious wall (2).
7. The asphalt concrete core wall and dam foundation concrete cut-off wall joint structure of claim 6, wherein: the downstream side of the downstream transition layer structure (6) is provided with a rock-fill region (4).
8. The asphalt concrete core and dam foundation concrete cut-off wall joint structure of claim 7, wherein: the downstream side of the downstream transition layer structure (6) is provided with a reverse filtering drainage layer structure (8).
9. The asphalt concrete core wall and dam foundation concrete cut-off wall joint structure of claim 6, wherein: the foundation between the upstream transition layer structure (5) and the downstream transition layer structure (6) is provided with a consolidation grouting structure (9).
10. The asphalt concrete core and dam foundation concrete cut-off wall joint structure of claim 9, wherein: a cushion structure (7) is arranged below the flexible asphalt concrete (3), and a pourable material layer (13) is arranged below the cushion structure (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321773.8A CN108301384B (en) | 2018-04-11 | 2018-04-11 | Joint structure of asphalt concrete core wall and dam foundation concrete impervious wall |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321773.8A CN108301384B (en) | 2018-04-11 | 2018-04-11 | Joint structure of asphalt concrete core wall and dam foundation concrete impervious wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108301384A CN108301384A (en) | 2018-07-20 |
| CN108301384B true CN108301384B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810321773.8A Active CN108301384B (en) | 2018-04-11 | 2018-04-11 | Joint structure of asphalt concrete core wall and dam foundation concrete impervious wall |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356102B (en) * | 2018-11-23 | 2024-01-30 | 中国电建集团成都勘测设计研究院有限公司 | Asphalt concrete core wall and dam foundation impervious wall connecting structure |
| CN110004886A (en) * | 2019-05-15 | 2019-07-12 | 中国电建集团中南勘测设计研究院有限公司 | Asphaltic concrete core wall basement construction method and its structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4266885A (en) * | 1977-07-13 | 1981-05-12 | Ohbayashi-Gumi Ltd. | Method of constructing a continuous cut-off wall and a core of a fill-type dam |
| US6612779B1 (en) * | 1998-12-10 | 2003-09-02 | Capri Tech Italia S.R.L. | Embankment dam and waterproofing method |
| CN104358270A (en) * | 2014-12-03 | 2015-02-18 | 中国电建集团成都勘测设计研究院有限公司 | High core wall rock-fill dam foundation seepage prevention structure on deep overburden layer |
| CN106368176A (en) * | 2016-11-08 | 2017-02-01 | 中国电建集团成都勘测设计研究院有限公司 | High dam structure built on deep overburden of soil material shortage area |
| CN105464056B (en) * | 2015-12-08 | 2017-10-20 | 辽宁省水利水电勘测设计研究院 | A kind of leakage preventing structure for adapting to Earth-rockfill Dam Settlements |
| CN208055997U (en) * | 2018-04-11 | 2018-11-06 | 中国电建集团成都勘测设计研究院有限公司 | Asphaltic concrete core wall and dam foundation concrete watertight wall joint structure |
-
2018
- 2018-04-11 CN CN201810321773.8A patent/CN108301384B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4266885A (en) * | 1977-07-13 | 1981-05-12 | Ohbayashi-Gumi Ltd. | Method of constructing a continuous cut-off wall and a core of a fill-type dam |
| US6612779B1 (en) * | 1998-12-10 | 2003-09-02 | Capri Tech Italia S.R.L. | Embankment dam and waterproofing method |
| CN104358270A (en) * | 2014-12-03 | 2015-02-18 | 中国电建集团成都勘测设计研究院有限公司 | High core wall rock-fill dam foundation seepage prevention structure on deep overburden layer |
| CN105464056B (en) * | 2015-12-08 | 2017-10-20 | 辽宁省水利水电勘测设计研究院 | A kind of leakage preventing structure for adapting to Earth-rockfill Dam Settlements |
| CN106368176A (en) * | 2016-11-08 | 2017-02-01 | 中国电建集团成都勘测设计研究院有限公司 | High dam structure built on deep overburden of soil material shortage area |
| CN208055997U (en) * | 2018-04-11 | 2018-11-06 | 中国电建集团成都勘测设计研究院有限公司 | Asphaltic concrete core wall and dam foundation concrete watertight wall joint structure |
Non-Patent Citations (1)
| Title |
|---|
| 泸定水电站粘土心墙堆石坝设计;王党在;金伟;王方亮;韩勇;;水力发电(第05期);14-16页 * |
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| CN108301384A (en) | 2018-07-20 |
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