CN114293517B - Method for preventing asphalt concrete core wall and concrete base in mountain gorge valley region from cracking - Google Patents
Method for preventing asphalt concrete core wall and concrete base in mountain gorge valley region from cracking Download PDFInfo
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- CN114293517B CN114293517B CN202210172059.3A CN202210172059A CN114293517B CN 114293517 B CN114293517 B CN 114293517B CN 202210172059 A CN202210172059 A CN 202210172059A CN 114293517 B CN114293517 B CN 114293517B
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- asphalt concrete
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Abstract
The invention discloses a method for preventing asphalt concrete core walls and concrete bases in mountain gorges valley areas from being cracked, wherein a plurality of layers of geocells are horizontally paved in the asphalt concrete core walls near the left and right sides along the height direction of the asphalt concrete core walls, the geocells extend into the concrete bases at least 50cm along the axial direction of a dam, a copper sheet water stop sheet is folded upwards at least 30cm, the geocells extend into the asphalt concrete core walls at least 5m along the axial direction of the dam, and meanwhile, the geocells extend to two sides to transition layers at 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 pull-crack separation of the asphalt concrete core wall and the concrete base, avoiding the water leakage of the dam body, and having low cost and convenient construction.
Description
Technical Field
The invention relates to an asphalt concrete core wall dam, in particular to a method for preventing asphalt concrete core walls and concrete bases in mountain gorge areas from cracking.
Background
Asphalt concrete core wall dams are one of the emerging dam types of hydraulic dam structures due to good impermeability, anti-aging property, corrosion resistance and the like. In recent years, more and more asphalt concrete core dams break through hundreds of meters in height. In the dam building and running process, under the action of gravity, construction load and water pressure of the dam body, large uneven settlement can occur to the dam, and the safety of the dam is seriously threatened. As shown in fig. 1, in particular in the mountain gorge region, the high asphalt concrete core wall 1 has serious tension phenomenon, so that the asphalt concrete core wall 1 and the concrete base 2 are separated by tension, water leakage of a dam body is caused, and the maintenance difficulty is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for preventing asphalt concrete core walls and concrete bases in the mountain gorge areas from cracking, which is low in cost and convenient to construct.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for preventing asphalt concrete core wall and concrete base from cracking in mountain gorge valley areas is characterized in that a plurality of layers of geocells are horizontally paved in the asphalt concrete core wall near the left and right banks along the height direction of the asphalt concrete core wall, the geocells extend into the concrete base at least 50cm along the axial direction of a dam, the water stop sheets of copper sheets are folded upwards at least 30cm, the geocells extend into the asphalt concrete core wall at least 5m along the axial direction of the dam, and meanwhile, the geocells extend to two sides to transition layers of 1.5-2.0 m.
The earthwork cells are laid in multiple layers from concrete bases at the bottoms of the dam bases at two bank positions of the dam body, the maximum distance is not more than 2/3 of the height of the dam, the layer spacing is 1-1.5m, and the height of the earthwork cells is not less than 15cm.
When the asphalt concrete core wall or the transition layer is rolled, the filler passes through the top surface of the geocell for 30cm and is rolled, and the filler is compacted by frog ramming so as to avoid the geocell from being crushed.
The invention has the beneficial effects that: the deformation of the asphalt concrete core wall is limited and reduced by utilizing the side limit principle of the geocell, so that the asphalt concrete core wall and the concrete base are prevented from being pulled to crack and be separated, the dam body is prevented from leaking, the cost is low, and the construction is convenient.
Drawings
FIG. 1 is a schematic illustration of a prior art asphalt concrete core wall and concrete foundation in a mountain gorge region.
FIG. 2 is a cross-sectional view of an asphalt concrete core wall and concrete foundation prevented from cracking in the mountainous canyon area using the method of the present invention.
Fig. 3 is a plan view of fig. 2.
Detailed Description
The technical solutions 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 apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
As shown in fig. 2 to 3, in the method for preventing the asphalt concrete core wall and the concrete base in the alpine gorge region from being cracked, in the asphalt concrete core wall 1 close to the left and right banks, a plurality of layers of geocells 3 are horizontally paved along the height direction of the asphalt concrete core wall, the geocells 3 extend into the concrete base 2 by at least 50cm along the axial direction of a dam, the copper sheet water stop sheets 5 are folded upwards by at least 30cm, the geocells 1 extend into the asphalt concrete core wall 1 by at least 5m along the axial direction of the dam, and meanwhile, the geocells 3 extend to the two sides by 1.5-2.0 m in the transition layers 4 on the two sides.
When the asphalt concrete core wall 1 or the transition layer 4 is rolled, the filler passes over the top surface of the geocell 3 for 30cm to be rolled, and is compacted by frog ramming, so that the geocell 3 is prevented from being crushed.
In particular, the geocell 3 is of reliable quality and has sufficient toughness to limit and reduce deformation of the asphalt concrete core wall. The geocell 3 is durable and has a life not shorter than the designed service life of the dam to ensure that its function does not fail during normal use of the dam. The geocell 3 extends into the concrete base 2 along the axial direction of the dam so as to facilitate the asphalt concrete core wall 1 and the concrete base 2 to be better connected into a whole. When concrete near the copper sheet water stop sheet 5 in the concrete base 2 is poured, the geocell 3 is supported so as to be beneficial to filling the concrete.
The geocell is used as a three-dimensional reinforcement type, is widely applied in various fields at home and abroad at present, and can improve the overall stability of the asphalt concrete core wall, the transition layer and the base through the side limiting action of the side wall, the friction action of the upper and lower interfaces of the reinforcement layer and the stress diffusion and the flexible raft action of the reinforcement layer, thereby relieving the tension state of the asphalt concrete core wall and limiting and reducing the deformation of the asphalt concrete core wall.
The foregoing examples are provided for illustrating the technical spirit and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention solely by the present examples, i.e., equivalent changes or modifications to the spirit of the present invention disclosed herein, still fall within the scope of the present invention.
Claims (2)
1. A method for preventing asphalt concrete core wall and concrete base from cracking in the mountain gorge valley area is characterized in that a plurality of layers of geocells are horizontally paved in the asphalt concrete core wall close to the left and right sides along the height direction of the asphalt concrete core wall, the geocells extend into the concrete base by at least 50cm along the axial direction of a dam, the copper sheet water stop sheets are folded upwards by at least 30cm, the geocells extend into the asphalt concrete core wall by at least 5m along the axial direction of the dam, and meanwhile, the geocells extend to two sides by 1.5-2.0 m to transition layers; the earthwork cells are laid in multiple layers from concrete bases at the bottoms of the dam bases at two bank positions of the dam body, the maximum distance is not more than 2/3 of the height of the dam, the layer spacing is 1-1.5m, and the height of the earthwork cells is not less than 15cm.
2. The method of preventing cracking of asphalt concrete core walls and concrete bases in high mountain and valley areas according to claim 1, wherein when the asphalt concrete core walls or the transition layer are rolled, the filler is rolled only by 30cm beyond the top surface of the geocell, and the filler is compacted by frog ramming so as not to crush the geocell.
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 |
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| 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 |
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| Publication Number | Publication Date |
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| CN114293517A CN114293517A (en) | 2022-04-08 |
| CN114293517B true 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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| CN114293517A (en) | 2022-04-08 |
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