CN114277743A - Dam head structure of high-steep-slope clay core wall earth-rock dam and construction method thereof - Google Patents
Dam head structure of high-steep-slope clay core wall earth-rock dam and construction method thereof Download PDFInfo
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- CN114277743A CN114277743A CN202111628972.1A CN202111628972A CN114277743A CN 114277743 A CN114277743 A CN 114277743A CN 202111628972 A CN202111628972 A CN 202111628972A CN 114277743 A CN114277743 A CN 114277743A
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- 239000004927 clay Substances 0.000 title claims abstract description 52
- 239000011435 rock Substances 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title claims abstract description 13
- 238000005192 partition Methods 0.000 claims abstract description 33
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 17
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 206010000349 Acanthosis Diseases 0.000 claims description 8
- 230000001174 ascending effect Effects 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 7
- 239000004567 concrete Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000035772 mutation Effects 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention discloses a dam head structure of a clay core earth-rock dam with a high steep slope, which comprises a clay core wall and a dam shell, wherein the clay core wall and the dam shell are built on a slope, a vertical cross-shaped reinforced concrete partition wall is poured at the center of the clay core wall, the partition wall comprises a separation wall, a left thorn wall and a right thorn wall, the separation wall is perpendicular to the axis direction of the clay core wall along the upstream direction and the downstream direction and has the same width as the clay core wall, the left thorn wall and the right thorn wall are positioned on two sides of the separation wall and coincide with the axis of the clay core wall, the top of the separation wall, the top of the left thorn wall and the top of the right thorn wall are as high as the clay core wall, and the bottom of the separation wall, the left thorn wall and the right thorn wall are positioned in a foundation groove excavated on the slope. The concrete partition wall is arranged at the mutation position to divide the earth-rock dam into two parts, so that cracks are prevented from being generated at the mutation position of the core wall of the earth-rock dam, the drift diameter is prolonged by utilizing the stabbing wall, and the seepage stability is ensured. The construction process is simple, the problem that cracks are generated at the mutation position of the earth-rock dam core wall is solved, and great economic benefits and social benefits can be brought to engineering operation.
Description
Technical Field
The invention relates to a dam head structure of an earth-rock dam, in particular to a dam head structure of a high-steep clay core-wall earth-rock dam for preventing uneven settlement and a construction method thereof.
Background
In dam design, the dam type widely used is an earth-rock dam, and a clay core earth-rock dam is one of the most common dam types. In the design process of modern dams, the height of earth-rock dams is broken through again and again, and due to the fact that the earth-rock dams are built in deep-mountain canyons and high slopes on two banks are steep, designers often require the high and steep hills to be cut into certain gentle slopes, construction difficulty is increased, and investment is greatly increased. Design engineers usually adopt dam materials with the water content lower than the optimal water content by 0.8% for the design of the heart wall so as to reduce the sedimentation deformation and reduce the deformation difference with the sedimentation at the bank slope. And a layer of same dam material is filled around the dam material, but the filling water content is 2% -3% higher than the optimal water content, the ultimate tensile strain of the transition region is increased, and the possibility of tensile crack is reduced, but the construction quality of the treatment mode is difficult to guarantee, and the construction period is long.
The dam type of the earth-rock dam has the advantages of fast construction, local material utilization and investment saving. However, during the operation of the project, once cracks appear on the core wall, the treatment difficulty is high, and the cost is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dam head structure of a high and steep clay core earth-rock dam for preventing uneven settlement and a construction method thereof, and avoiding transverse seams of a core wall caused by uneven settlement.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a dam head structure of high steep slope clay core earth-rock dam, is including building clay core wall and the dam shell on the side slope, has pour the reinforced concrete partition wall of vertical "ten" font in clay core wall center department, and the partition wall includes the divider wall the same with clay core wall width along the upstream and downstream direction perpendicular to clay core wall axis direction, is located left acanthosis wall and the right acanthosis wall of divider wall both sides and the coincidence of clay core wall axis, and the top and the clay core wall of divider wall, left acanthosis wall and right acanthosis wall are the same height, and the bottom is located in the basic slot of excavation on the side slope.
The width of the foundation trench is larger than the thickness of the reinforced concrete partition wall.
And excavating the foundation trench to weakly weathered bedrock and cleaning the foundation trench.
The construction method of the dam head of the earth-rock dam with the clay core wall at the high steep slope comprises the following steps:
(1) before filling two dam head core walls of the earth-rock dam, excavating foundation grooves on the top of a slope along the upstream direction and the downstream direction and the axial direction of the dam, and then pouring a reinforced concrete partition wall on the foundation grooves to prolong the seepage length of water flow in the clay core walls;
(2) after the reinforced concrete partition wall is poured, clay core walls are simultaneously filled on two sides of the reinforced concrete partition wall body, and dam bodies on the two sides keep the same ascending speed.
The invention has the beneficial effects that: the concrete partition wall is arranged at the dam head of the earth-rock dam to divide the earth-rock dam into two parts, so that cracks of the core wall of the earth-rock dam at the abrupt change position of the side slope at the dam head are avoided, and the seepage diameter is prolonged by utilizing the left stabbing wall and the right stabbing wall. The invention has simple structure and separate construction, solves the problem that the core wall of the earth-rock dam cracks at the dam head, and can bring considerable economic and social benefits to engineering operation.
Drawings
Fig. 1 is a plan view of a dam head structure of a high steep clay core earth-rock dam for preventing uneven settlement according to the present invention.
Fig. 2 is a sectional view taken along a-a in fig. 1.
Fig. 3 is a sectional view taken along the line b-b in fig. 1.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; 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.
As shown in fig. 1 and 2, the dam head structure of the clay core earth-rock dam with the high and steep slopes comprises a clay core wall 1 and a dam shell 2 which are built on the slopes, wherein a vertical cross-shaped reinforced concrete partition wall is poured in the center of the clay core wall 1, the partition wall comprises a partition wall 3 which is perpendicular to the axial direction of the clay core wall 1 along the upstream direction and has the same width as the clay core wall 1, a left barbed wall 6 and a right barbed wall 7 which are positioned on two sides of the partition wall 3 and coincide with the axial direction of the clay core wall 1, the tops of the partition wall 3, the left barbed wall 6 and the right barbed wall 7 are as high as the clay core wall 1, and the bottoms of the partition wall 3, the left barbed wall 6 and the right barbed wall 7 are located in a foundation groove 5 dug in the slopes 4.
The width of the foundation trench 5 is larger than the thickness of the reinforced concrete partition wall. And the foundation trench 5 is excavated to the weak regolith rock and cleaned.
The construction method of the dam head of the earth-rock dam with the clay core wall at the high steep slope comprises the following steps:
(1) before filling two dam head core walls of the earth-rock dam, excavating foundation grooves on the top of a slope along the upstream direction and the downstream direction and the axial direction of the dam, and then pouring a reinforced concrete partition wall on the foundation grooves to prolong the seepage length of water flow in the clay core walls;
(2) after the reinforced concrete partition wall is poured, clay core walls are simultaneously filled on two sides of the reinforced concrete partition wall body, and dam bodies on the two sides keep the same ascending speed.
Before filling the core walls of the dam heads on the two sides of the earth-rock dam, grooves are dug on the top of the slope along the upstream direction and the downstream direction, then concrete partition walls are poured on the grooves, and stabbing walls are arranged to prolong the water flow seepage path and keep the seepage stability. The invention utilizes the stabbed wall to prolong the seepage diameter, and ensures the stability of the partition wall through the base and the soil body formed in the foundation trench. The concrete partition wall is arranged at the dam head of the earth-rock dam to divide the earth-rock dam into two parts, so that cracks of the core wall of the earth-rock dam at the abrupt change position of the side slope at the dam head are avoided.
Specifically, before filling the clay core wall 1 and the dam shell 2 at the dam head of the earth-rock dam, a groove is dug in the top of the side slope 4 along the upstream direction and the downstream direction to the edge of the core wall to serve as a foundation groove 5 of a pouring base, a concrete separation wall 3 is poured on the foundation groove to the top of the clay core wall 1, and a certain distance is reserved between the top of the clay core wall 1 and the dam top. And (3) pouring concrete left and right barbed walls 6 and 7 along the axis of the dam so as to prolong the seepage length of water flow in the clay core wall.
The base width of the partition wall 4 and the left and right stabbed walls is larger than the wall thickness. The partition wall structure is reinforced concrete. And excavating the foundation trench foundation to the weakly weathered bedrock and cleaning the foundation trench foundation. After the partition wall is poured, clay core walls 1 are simultaneously filled on two sides of the wall body, and dam bodies on the two sides keep the same ascending speed.
The length of the separation wall 3 is the same as the width of the clay core wall 1, and the lengths of the left thorn wall 6 and the right thorn wall 7 are determined according to seepage calculation. The clay core wall soil material filled and contacted with the partition wall has high plasticity, can be mechanically rolled, and is manually compacted at the position difficult to compact.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to carry out the same, and the present invention shall not be limited to the embodiments, i.e. the equivalent changes or modifications made within the spirit of the present invention shall fall within the scope of the present invention.
Claims (4)
1. The utility model provides a dam head structure of high steep slope clay core earth-rock dam, including clay core wall (1) and dam shell (2) of building on the side slope, a serial communication port, the reinforced concrete partition wall of vertical "ten" font is pour in clay core wall (1) center department, the partition wall includes along the same divider wall (3) of up-downstream direction perpendicular to clay core wall (1) axis direction and clay core wall (1) width, be located left acanthosis wall (6) and right acanthosis wall (7) of divider wall (3) both sides and the coincidence of clay core wall (1) axis, the top and the same height of divider wall (3), left acanthosis wall (6) and right acanthosis wall (7), the bottom is located in basic slot (5) of excavation on side slope (4).
2. The dam head structure of a high steep clay core earth-rock dam as claimed in claim 1, wherein the width of the foundation trench (5) is greater than the thickness of the reinforced concrete partition wall.
3. The dam head structure of a high steep slope clay core earth-rock dam as claimed in claim 1, wherein the foundation trench (5) is excavated to weak regolith rock and cleaned.
4. The construction method of the dam head of the high steep clay core earth-rock dam as claimed in any one of claims 1 to 3, comprising the steps of:
(1) before filling two dam head core walls of the earth-rock dam, excavating foundation grooves on the top of a slope along the upstream direction and the downstream direction and the axial direction of the dam, and then pouring a reinforced concrete partition wall on the foundation grooves to prolong the seepage length of water flow in the clay core walls;
(2) after the reinforced concrete partition wall is poured, clay core walls are simultaneously filled on two sides of the reinforced concrete partition wall body, and dam bodies on the two sides keep the same ascending speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111628972.1A CN114277743A (en) | 2021-12-28 | 2021-12-28 | Dam head structure of high-steep-slope clay core wall earth-rock dam and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111628972.1A CN114277743A (en) | 2021-12-28 | 2021-12-28 | Dam head structure of high-steep-slope clay core wall earth-rock dam and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114277743A true CN114277743A (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111628972.1A Pending CN114277743A (en) | 2021-12-28 | 2021-12-28 | Dam head structure of high-steep-slope clay core wall earth-rock dam and construction method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0084647A2 (en) * | 1982-01-21 | 1983-08-03 | Bauunternehmen Müller Gönnern GmbH & Co. KG | Impervious core used in the construction of dams |
| JPH09125347A (en) * | 1995-10-31 | 1997-05-13 | Hazama Gumi Ltd | Building method of dam |
| KR20030037829A (en) * | 2001-11-06 | 2003-05-16 | 김태희 | Core Retrofitting Structure for Aged Rockfill Dam or Reservior using Penetrable Waterproofing Agent |
| CN113482027A (en) * | 2021-07-19 | 2021-10-08 | 黄庆武 | Prevention of seepage water wall structure based on hydraulic and hydroelectric engineering construction |
| CN113718710A (en) * | 2021-08-16 | 2021-11-30 | 曹伟 | Anti-seepage and anti-impact dam |
-
2021
- 2021-12-28 CN CN202111628972.1A patent/CN114277743A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0084647A2 (en) * | 1982-01-21 | 1983-08-03 | Bauunternehmen Müller Gönnern GmbH & Co. KG | Impervious core used in the construction of dams |
| JPH09125347A (en) * | 1995-10-31 | 1997-05-13 | Hazama Gumi Ltd | Building method of dam |
| KR20030037829A (en) * | 2001-11-06 | 2003-05-16 | 김태희 | Core Retrofitting Structure for Aged Rockfill Dam or Reservior using Penetrable Waterproofing Agent |
| CN113482027A (en) * | 2021-07-19 | 2021-10-08 | 黄庆武 | Prevention of seepage water wall structure based on hydraulic and hydroelectric engineering construction |
| CN113718710A (en) * | 2021-08-16 | 2021-11-30 | 曹伟 | Anti-seepage and anti-impact dam |
Non-Patent Citations (2)
| Title |
|---|
| 梁军: "纵向增强体土石坝新坝型及其安全运行性能分析" * |
| 湖南省革命委员会水利电力局《农村水电站》编写组编: "碾压式土石坝设计手册 上", 水利电力出版社 * |
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Application publication date: 20220405 |