CN114293516A - Rapid solution method for preventing earth-rock dam overproof overtopping flood damage - Google Patents
Rapid solution method for preventing earth-rock dam overproof overtopping flood damage Download PDFInfo
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- CN114293516A CN114293516A CN202210174343.4A CN202210174343A CN114293516A CN 114293516 A CN114293516 A CN 114293516A CN 202210174343 A CN202210174343 A CN 202210174343A CN 114293516 A CN114293516 A CN 114293516A
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Abstract
The invention discloses a quick solution method for preventing an earth-rock dam from exceeding standard overtopping and overtopping flood damage, which comprises the following steps: before the excessive overtaking overtopping flood comes, the dam crest and the downstream dam slope are cleaned, and then two rows of limiting columns are arranged from the wave-proof wall of the dam crest to the dam foot along the downstream dam slope; chiseling a wave wall at the dam crest between two rows of limiting columns, laying a rapidly inflatable air bag with a U-shaped section from the gap of the wave wall to the downstream dam foot along a downstream dam slope and fixing the air bag between the two rows of limiting columns, and extending the rapidly inflatable air bag downwards for a certain distance along the upstream dam slope to prevent the rapidly inflatable air bag from being pushed away by water; and inflating the air bag, and constructing an anti-abrasion coating on the inner surface of the air bag, so that the whole construction is completed. The air bag with high strength and quick inflation is used for conveying the excessive overflowing top water flow to the outside of the dam foot elutriation range, so that dam break caused by overflowing top damage is effectively avoided, and the dam is particularly suitable for a dam with a plurality of step reservoirs.
Description
Technical Field
The invention relates to an earth and rockfill dam, in particular to a quick solution for preventing the earth and rockfill dam from exceeding standard and overtopping flood damage.
Background
For the purpose of making good use of harmful substances, mankind has built many hydraulic projects on rivers and rivers around the world, wherein reservoir projects for repairing dams and storing water occupy an important position, and barrage is the most important component of reservoir projects. As the advantages of local materials and the like can be fully utilized, the earth and rockfill dam with the earth impervious body is a dam type which is most widely applied and developed quickly in the world dam construction.
The earth-rock dam has strong applicability to dam site geology and topographic conditions and has better seismic performance. In the design and application process of the earth-rock dam, the most important thing is to prevent the flood overtopping condition. Most of the dam breaks of earth and rockfill dams are caused by overtopping, such as a Hannan reservoir, a rock flood reservoir, and two dam breaks of earth and rockfill dams occurring in Mongolia in 2021. The method for preventing the overtime flood damage is urgently needed because the overtime flood occurs to cause the overtime crash of one upstream reservoir and further cause the dam break damage of a series of downstream reservoirs due to the fact that the flood drains and is superposed instead of the original design flood standard is not enough.
Disclosure of Invention
The invention aims to solve the technical problem of providing a quick solution for preventing the damage of the exceeding overtime flood of the earth-rock dam, wherein the exceeding overtime flood is delivered to the outside of the dam foot washing range by utilizing a high-strength and quick inflatable air bag, so that the dam break caused by the overtime flood is effectively avoided, and the method is particularly suitable for dams with reservoirs with multiple steps and sudden extreme weather.
In order to solve the technical problems, the invention adopts the technical scheme that: a rapid solution method for preventing the damage of the earth-rock dam caused by the excessive overtime flood comprises the following steps:
(1) before the excessive overtaking overtopping flood comes, the dam crest and the downstream dam slope are cleaned, and then two rows of limiting columns are arranged from the wave-proof wall of the dam crest to the dam foot along the downstream dam slope;
(2) chiseling a wave wall at the dam crest between two rows of limiting columns, laying a rapidly inflatable air bag with a U-shaped section from the gap of the wave wall to the downstream dam foot along a downstream dam slope and fixing the air bag between the two rows of limiting columns, and extending the rapidly inflatable air bag downwards for a certain distance along the upstream dam slope to prevent the rapidly inflatable air bag from being pushed away by water;
(3) and inflating the air bag, and constructing an anti-abrasion coating on the inner surface of the air bag, so that the whole construction is completed.
The bottom surface of the inner side of the U-shaped air bag capable of being inflated quickly is lower than the height of the wave wall, and the side walls on the two sides are higher than the height of the wave wall.
The height of the inner bottom surface of the U-shaped quick inflatable air bag is at least 50cm lower than the height of the wave wall.
The distance between the side walls on the two sides of the inner side of the air bag is 20-40 m.
The anti-abrasion coating is SK-PAM special anti-abrasion resin mortar researched and developed by China Water conservancy and hydropower science research institute and is 2cm thick.
The invention has the beneficial effects that: the air bag can be quickly inflated, the construction speed is high, and the construction and later-stage maintenance are convenient. And secondly, the air bags and the wave walls convey the excessive overflowing water flow to the outside of the dam toe brushing range, so that dam break caused by overflowing damage is effectively avoided. And thirdly, the air bag is made of high-strength polymer materials, so that the anti-scouring capability is good, and overtopping flood can be prevented from entering a downstream dam body, so that the dam body is scoured and a leakage phenomenon occurs. Fourthly, when the later structure is in problem, the structure can be quickly repaired, and the operation and management are convenient.
Drawings
FIG. 1 is a typical schematic diagram of a process employing the present invention.
Fig. 2 is an exemplary schematic diagram of the upstream direction.
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.
As shown in fig. 1 and 2, the rapid solution for preventing the damage of the earth-rock dam caused by the excessive overtime overtopping flood comprises the following steps:
(1) before the excessive overtime flood comes, the dam crest 2 and the downstream dam slope 9 are cleaned, and then two rows of limiting columns 7 are arranged from the wave-proof wall 1 of the dam crest 2 to the dam foot along the downstream dam slope 9;
(2) chiseling the wave wall 1 at the dam crest between two rows of limiting columns 7, laying the airbag 3 with the U-shaped section and capable of being rapidly inflated to the downstream dam foot from the gap of the wave wall along the downstream dam slope and fixing the airbag between the two rows of limiting columns 7, and meanwhile, extending the airbag 3 capable of being rapidly inflated downwards for a certain distance along the upstream dam slope to prevent the airbag 3 capable of being rapidly inflated from being pushed away by water;
(3) and (3) inflating the air bag 4, and constructing an anti-abrasion coating 8 on the inner surface of the air bag, thereby finishing the whole construction.
The bottom surface of the inner side of the U-shaped air bag 3 which can be inflated quickly is lower than the height of the wave wall, and the side walls at two sides are higher than the height of the wave wall.
The height of the inner bottom surface of the U-shaped quick inflatable air bag is at least 50cm lower than the height of the wave wall.
The distance between the side walls on the two sides of the inner side of the air bag is 20-40 m.
The anti-abrasion coating is SK-PAM special anti-abrasion resin mortar researched and developed by China Water conservancy and hydropower science research institute and is 2cm thick.
The invention utilizes the high-strength and rapidly-inflatable air bag 3 to convey the excessive overflowing top water flow to the outside of the washing range of the dam toe, thereby effectively avoiding dam break caused by overflowing top damage. The airbag 3 can be rapidly inflated. When the upper reaches produce the super standard flood, can assemble fast. Can be recycled after flood.
The air bag 3 is made of high-strength polymer materials, and the side wall of the air bag can resist a certain water head (the principle is the same as that of a rubber dam). To prevent being pushed away by the water, a portion extends up the upstream dam slope. The bladder 3 is fixed by the upstream water pressure. The distance between the side walls of the air bag is 20-40 m.
As described in detail below, in this example, the construction is performed according to the following steps:
firstly, cleaning dam tops and downstream dam slopes; then, arranging a limiting column on a downstream dam slope for fixing the air bag; chiseling the wave wall at the air bag at the top of the dam; then fixing the air bag and inflating; and finally, constructing an anti-abrasion coating (flexibility) on the inner surface of the air bag, and finishing the whole construction.
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 (5)
1. A rapid solution method for preventing the damage of the earth-rock dam caused by the excessive overtime flood is characterized by comprising the following steps:
(1) before the excessive overtaking overtopping flood comes, the dam crest and the downstream dam slope are cleaned, and then two rows of limiting columns are arranged from the wave-proof wall of the dam crest to the dam foot along the downstream dam slope;
(2) chiseling a wave wall at the dam crest between two rows of limiting columns, laying a rapidly inflatable air bag with a U-shaped section from the gap of the wave wall to the downstream dam foot along a downstream dam slope and fixing the air bag between the two rows of limiting columns, and extending the rapidly inflatable air bag downwards for a certain distance along the upstream dam slope to prevent the rapidly inflatable air bag from being pushed away by water;
(3) and inflating the air bag, and constructing an anti-abrasion coating on the inner surface of the air bag, so that the whole construction is completed.
2. The method for rapidly solving the problem of the damage of the earth-rock dam caused by the over-standard overtopping flood according to claim 1, wherein the bottom surface of the inner side of the U-shaped rapidly inflatable air bag is lower than the height of the wave wall, and the side walls on the two sides of the U-shaped rapidly inflatable air bag are higher than the height of the wave wall.
3. The rapid solution for preventing the damage of the earth and rockfill dam caused by the over-proof overtopping flood as claimed in claim 2, wherein the height of the inner bottom surface of said "U" shaped rapidly inflatable air bag is at least 50cm lower than the height of the wave wall.
4. The method for rapidly solving the problem of preventing the damage of the earth-rock dam due to the excessive overtopping flood according to claim 1, wherein the distance between the side walls on the two sides of the inner side of the air bag is 20-40 m.
5. The rapid solution for preventing the damage of the overflow flood of the earth and rockfill dam according to claim 1, wherein the anti-erosion coating is made of SK-PAM special anti-erosion resin mortar developed by the institute of Water conservancy and hydropower science of China and has a thickness of 2 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210174343.4A CN114293516B (en) | 2022-02-24 | 2022-02-24 | Rapid solving method for preventing earth and rockfill dam from exceeding standard and flooding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210174343.4A CN114293516B (en) | 2022-02-24 | 2022-02-24 | Rapid solving method for preventing earth and rockfill dam from exceeding standard and flooding |
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| CN114293516A true CN114293516A (en) | 2022-04-08 |
| CN114293516B CN114293516B (en) | 2023-09-29 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2140485C1 (en) * | 1998-10-23 | 1999-10-27 | Московский государственный университет природообустройства | Hydraulic structure |
| CN102409640A (en) * | 2011-09-02 | 2012-04-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Passive-drainage emergency rescue method in case of earth-rock dam break |
| CN206256425U (en) * | 2016-12-14 | 2017-06-16 | 河海大学 | A kind of Water flood protection device |
| CN110158546A (en) * | 2019-04-09 | 2019-08-23 | 中国水利水电科学研究院 | For earth and rockfill dam, the emergency safeguard structure and safeguard procedures of native bank of stone downstream slope |
| CN110387861A (en) * | 2019-07-29 | 2019-10-29 | 中水北方勘测设计研究有限责任公司 | It is a kind of for the earth rock cofferdam remodeling method for leading over-level flood off of meeting an urgent need |
| CN110761243A (en) * | 2019-10-18 | 2020-02-07 | 河海大学 | Buoyancy type geomembrane device for preventing dam breaking due to overtopping |
| CN214089727U (en) * | 2020-09-21 | 2021-08-31 | 周林江 | Novel waterproof dykes and dams |
-
2022
- 2022-02-24 CN CN202210174343.4A patent/CN114293516B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2140485C1 (en) * | 1998-10-23 | 1999-10-27 | Московский государственный университет природообустройства | Hydraulic structure |
| CN102409640A (en) * | 2011-09-02 | 2012-04-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Passive-drainage emergency rescue method in case of earth-rock dam break |
| CN206256425U (en) * | 2016-12-14 | 2017-06-16 | 河海大学 | A kind of Water flood protection device |
| CN110158546A (en) * | 2019-04-09 | 2019-08-23 | 中国水利水电科学研究院 | For earth and rockfill dam, the emergency safeguard structure and safeguard procedures of native bank of stone downstream slope |
| CN110387861A (en) * | 2019-07-29 | 2019-10-29 | 中水北方勘测设计研究有限责任公司 | It is a kind of for the earth rock cofferdam remodeling method for leading over-level flood off of meeting an urgent need |
| CN110761243A (en) * | 2019-10-18 | 2020-02-07 | 河海大学 | Buoyancy type geomembrane device for preventing dam breaking due to overtopping |
| CN214089727U (en) * | 2020-09-21 | 2021-08-31 | 周林江 | Novel waterproof dykes and dams |
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| CN114293516B (en) | 2023-09-29 |
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