CN114293517A - Method for preventing asphalt concrete core wall and concrete base from pulling apart in high mountain canyon region - Google Patents
Method for preventing asphalt concrete core wall and concrete base from pulling apart in high mountain canyon region Download PDFInfo
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- CN114293517A CN114293517A CN202210172059.3A CN202210172059A CN114293517A CN 114293517 A CN114293517 A CN 114293517A CN 202210172059 A CN202210172059 A CN 202210172059A CN 114293517 A CN114293517 A CN 114293517A
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- core wall
- geocell
- concrete core
- dam
- asphalt concrete
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Abstract
The invention discloses a method for preventing a bituminous concrete core wall and a concrete base in a high mountain valley region from being pulled apart, wherein a plurality of layers of geocell are horizontally laid in the bituminous concrete core wall close to the left bank and the right bank along the height direction of the bituminous concrete core wall, the geocell extends into the concrete base for at least 50cm along the axis direction of a dam, at least 30cm is folded upwards when a copper sheet water stop sheet is encountered, the geocell extends into the bituminous concrete core wall for at least 5m along the axis direction of the dam, and simultaneously the geocell extends to transition layers at two sides for 1.5-2.0 m. The invention utilizes the side limit principle of the geocell to limit and reduce the deformation of the asphalt concrete core wall, thereby avoiding the pulling crack and the separation of the asphalt concrete core wall and the concrete base, avoiding the water leakage of the dam body, having low cost and convenient construction.
Description
Technical Field
The invention relates to an asphalt concrete core dam, in particular to a method for preventing an asphalt concrete core and a concrete foundation from pulling apart in a high mountain canyon region.
Background
The asphalt concrete core wall dam becomes one of the new dam types of the dam body structure of the hydraulic dam due to good impermeability, aging resistance, corrosion resistance and the like. In recent years, more and more asphalt concrete core dams break through hectometer in height. In the process of damming and running, under the action of the gravity, construction load and water pressure of a dam body, the dam can generate large uneven settlement, and the safety of the dam is seriously threatened. As shown in fig. 1, especially in high mountain canyon regions, a high asphalt concrete core wall 1 has a severe tension phenomenon, so that the asphalt concrete core wall 1 and a concrete base 2 are pulled apart, a dam body leaks water, and the maintenance difficulty is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for preventing the tension cracks of the asphalt concrete core wall and the concrete foundation in the high mountain canyon region, which has low cost and convenient construction.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for preventing a bituminous concrete core wall and a concrete base in a high mountain canyon region from being pulled apart is characterized in that a plurality of layers of geocells are horizontally laid in the bituminous concrete core wall close to the left bank and the right bank along the height direction of the bituminous concrete core wall, each geocell extends into the concrete base by at least 50cm along the axis direction of a dam, at least 30cm is folded upwards when a copper sheet water stop sheet is met, at least 5m of the geocell extends into the bituminous concrete core wall along the axis direction of the dam, and meanwhile, the geocells extend to two sides of a transition layer by 1.5-2.0 m.
The geocell is laid in multiple layers from the concrete bases at the bottom of the dam foundation at the two banks of the dam body, the highest height of the geocell does not exceed 2/3 of the dam height, the interlayer spacing is 1-1.5m, and the height of the geocell is not less than 15 cm.
When the asphalt concrete core wall or the transition layer is rolled, the filler passes 30cm of the top surface of the geocell and is rolled, and frog ramming compaction is adopted, so that the geocell is prevented from being crushed.
The invention has the beneficial effects that: by utilizing the side limit principle of the geocell, the deformation of the asphalt concrete core wall is limited and reduced, so that the asphalt concrete core wall and the concrete foundation are prevented from being pulled and cracked to separate, the water leakage of a dam body is avoided, the cost is low, and the construction is convenient.
Drawings
FIG. 1 is a schematic view of a prior art asphalt concrete core and concrete foundation in a high mountain canyon area.
FIG. 2 is a cross-sectional view of the method of the present invention for preventing the tearing of the asphalt concrete core and the concrete foundation in the high mountain canyon region.
Fig. 3 is a plan view of fig. 2.
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.
As shown in fig. 2 to 3, in the method for preventing the tearing of the asphalt concrete core and the concrete foundation in the high mountain canyon region, a plurality of layers of geocells 3 are horizontally laid in the asphalt concrete core 1 close to the left bank and the right bank along the height direction of the asphalt concrete core, the geocells 3 extend into the concrete foundation 2 for at least 50cm along the axis direction of the dam, the geocells 1 extend into the asphalt concrete core 1 for at least 5m along the axis direction of the dam when the copper sheet water stop sheets 5 are folded upwards for at least 30cm, and the geocells 3 extend into the transition layers 4 at two sides for 1.5 to 2.0m towards two sides.
When the asphalt concrete core wall 1 or the transition layer 4 is rolled, the filler is rolled after crossing the top surface of the geocell 3 by 30cm, and is compacted by a frog rammer so as to avoid crushing the geocell 3.
In particular, the geocell 3 is of a reliable quality and has sufficient toughness to serve the purpose of limiting and reducing deformation of the asphalt concrete core. The geocell 3 should have a certain durability, and the service life is not shorter than the design service life of the dam, so as to ensure that the function of the dam is not invalid during the normal use period of the dam. The geocell 3 extends into the concrete base 2 along the axis direction of the dam so as to be beneficial to better connecting the asphalt concrete core wall 1 and the concrete base 2 into a whole. When concrete near the copper sheet water stop sheet 5 in the concrete base 2 is poured, the geocell 3 needs to be supported, so that the concrete can be filled conveniently.
The geocell is widely applied to various fields at home and abroad at present, and can improve the integral stability of the asphalt concrete core wall, the transition layer and the base through the side limiting effect of the side wall, the friction effect of the upper interface and the lower interface of the reinforcement layer, the stress diffusion of the reinforcement layer and the flexible raft foundation effect, relieve the tensile state of the asphalt concrete core wall and limit and reduce the deformation of the asphalt concrete core wall.
The above examples 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 implement the same, and the scope of the present invention is not limited by the examples, i.e., the equivalent changes or modifications made in the spirit of the present invention disclosed are still within the scope of the present invention.
Claims (3)
1. The method for preventing the tension cracks of the asphalt concrete core wall and the concrete foundation in the high mountain valley region is characterized in that a plurality of layers of geocells are horizontally laid along the height direction of the asphalt concrete core wall in the asphalt concrete core wall close to the left bank and the right bank, the geocells stretch into the concrete foundation by at least 50cm along the axis direction of the dam, when a copper sheet water stop sheet is folded upwards by at least 30cm, the geocells stretch into the asphalt concrete core wall by at least 5m along the axis direction of the dam, and simultaneously the geocells extend to transition layers at two sides by 1.5-2.0 m.
2. The method for preventing the tearing of the asphalt concrete core wall and the concrete foundation in the high mountain and canyon region according to claim 1, wherein the geocell is laid in a plurality of layers from the concrete foundation at the bottom of the dam foundation at the two bank parts of the dam body, the maximum of the geocell is not more than 2/3 of the dam height, the interlayer distance is 1-1.5m, and the height of the geocell is not less than 15 cm.
3. The method for preventing the tension crack between the asphalt concrete core and the concrete foundation in the high mountain and canyon region as claimed in claim 1, wherein when the asphalt concrete core or the transition layer is rolled, the filler is rolled 30cm over the top surface of the geocell, and the geocell is compacted by a frog hammer so as not to be crushed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172059.3A CN114293517B (en) | 2022-02-24 | 2022-02-24 | Method for preventing asphalt concrete core wall and concrete base in mountain gorge valley region from cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172059.3A CN114293517B (en) | 2022-02-24 | 2022-02-24 | Method for preventing asphalt concrete core wall and concrete base in mountain gorge valley region from cracking |
Publications (2)
| Publication Number | Publication Date |
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| CN114293517A true CN114293517A (en) | 2022-04-08 |
| CN114293517B CN114293517B (en) | 2023-09-29 |
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| CN202210172059.3A Active CN114293517B (en) | 2022-02-24 | 2022-02-24 | Method for preventing asphalt concrete core wall and concrete base in mountain gorge valley region from cracking |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2265693C1 (en) * | 2004-05-05 | 2005-12-10 | Открытое акционерное общество "Инженерный центр ЕЭС"-Гидропроект, Ленгидропроект, Теплоэлектропроект, Фирма ОРГРЭС" | Water-tight dam diaphragm formed of in-situ materials |
| CN104805844A (en) * | 2014-01-24 | 2015-07-29 | 中国水电顾问集团北京勘测设计研究院有限公司 | Connection structure between steep slope bituminous concrete core-wall and concrete foundation |
| CN108755320A (en) * | 2018-08-27 | 2018-11-06 | 山东大学 | A kind of reinforcement Foam lightweight soil Widening Embankment structure and its construction method |
| CN110144856A (en) * | 2019-05-24 | 2019-08-20 | 中水北方勘测设计研究有限责任公司 | The method for preventing narrow V-type river valley high CFRD face slab dislocation to be deformed crack |
| CN212200303U (en) * | 2020-04-03 | 2020-12-22 | 中国水利水电第十四工程局有限公司 | Reinforced chain net for clay core wall dam |
| CN112627117A (en) * | 2021-01-07 | 2021-04-09 | 松辽水利委员会水利工程建设管理站 | Water-stopping hot-melting connecting structure of asphalt concrete core wall and bank slope or building |
-
2022
- 2022-02-24 CN CN202210172059.3A patent/CN114293517B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2265693C1 (en) * | 2004-05-05 | 2005-12-10 | Открытое акционерное общество "Инженерный центр ЕЭС"-Гидропроект, Ленгидропроект, Теплоэлектропроект, Фирма ОРГРЭС" | Water-tight dam diaphragm formed of in-situ materials |
| CN104805844A (en) * | 2014-01-24 | 2015-07-29 | 中国水电顾问集团北京勘测设计研究院有限公司 | Connection structure between steep slope bituminous concrete core-wall and concrete foundation |
| CN108755320A (en) * | 2018-08-27 | 2018-11-06 | 山东大学 | A kind of reinforcement Foam lightweight soil Widening Embankment structure and its construction method |
| CN110144856A (en) * | 2019-05-24 | 2019-08-20 | 中水北方勘测设计研究有限责任公司 | The method for preventing narrow V-type river valley high CFRD face slab dislocation to be deformed crack |
| CN212200303U (en) * | 2020-04-03 | 2020-12-22 | 中国水利水电第十四工程局有限公司 | Reinforced chain net for clay core wall dam |
| CN112627117A (en) * | 2021-01-07 | 2021-04-09 | 松辽水利委员会水利工程建设管理站 | Water-stopping hot-melting connecting structure of asphalt concrete core wall and bank slope or building |
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| CN114293517B (en) | 2023-09-29 |
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