CN111893952A - Dam body of damming lake drainage dam breaks dam protection system gradually - Google Patents
Dam body of damming lake drainage dam breaks dam protection system gradually Download PDFInfo
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- CN111893952A CN111893952A CN202010799397.0A CN202010799397A CN111893952A CN 111893952 A CN111893952 A CN 111893952A CN 202010799397 A CN202010799397 A CN 202010799397A CN 111893952 A CN111893952 A CN 111893952A
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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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
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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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention relates to a gradual dam break protection system for a damming lake drainage dam body. The protection system includes: a drainage channel and a plurality of protective nets; the drainage ditch is excavated downstream along the central line of the drainage dam body of the barrier lake; and the plurality of protective nets are uniformly fixed on the downstream back water surface of the barrier lake drainage dam body. The dam body gradual dam break protection system for the drainage of the dammed lake slows down the dam break time of the dam body and ensures smooth drainage of the dammed lake.
Description
Technical Field
The invention relates to the field of disposal of protective measures of a drainage dam body, in particular to a gradual dam break protective system of a damming lake drainage dam body.
Background
China is a country with multiple earthquakes, and particularly in the southwest region of China, the earthquakes are high in frequency, high in strength and strong in destructiveness. The strong earthquake activity can lead to natural disasters such as landslide, collapse, mud-rock flow and the like of a mountain, and after falling rocks, silt and other substances block a river channel, a barrier dam body with loose structure and poor stability can be formed, so that the water level behind the dam body is continuously lifted, and a barrier lake is gradually formed. As the dam body structure is loose and unstable, the lake is blocked by a dam easily, once the dam is broken, water flow with high potential energy can impact downstream, the speed is high, the flow is large, flood disasters can occur at the downstream, and serious threats are brought to the life of people at the downstream. Therefore, after the barrage lake is formed, drainage is carried out in the shortest time, the water level is reduced, the dam body is removed as far as possible, flood control measures are taken, and the risk of dam break is reduced.
At present, when the traditional barrier lake is drained, the initial flow is small, the peak flow can be reached along with the continuous increase of the flow, the shearing force of water flow is also continuously enhanced, and the formed dam body is easy to break instantaneously. In terms of emergency measures of the barrier lake, firstly, drainage is carried out on the formed barrier lake, and a drainage ditch or a drainage groove is usually excavated by machinery. The mechanical grooving is large in workload and slow in speed, meanwhile, a place where a barrier lake is often formed is located in a mountain area, and large-scale excavating equipment is not easy to enter the site, so that construction is inconvenient. In addition, the excavation size of the drainage ditch is inconvenient to control, and the dam body is easy to collapse rapidly in the drainage process, so that the dam break accident is caused.
Disclosure of Invention
The invention aims to provide a protective system for gradually breaking a dam of a damming lake drainage dam body, which can slow down the dam breaking time of the dam body and ensure smooth drainage of the damming lake.
In order to achieve the purpose, the invention provides the following scheme:
a dam body of damming lake drainage breaks dam protection system gradually, includes: a drainage channel and a plurality of protective nets;
the drainage ditch is excavated downstream along the central line of the drainage dam body of the barrier lake;
and the plurality of protective nets are uniformly fixed on the downstream back water surface of the barrier lake drainage dam body.
Optionally, the cross-sectional shape of the drainage channel is trapezoidal.
Optionally, the depth of the drainage channel is lower than the depth of the drainage groove.
Optionally, the material of the protective net is a high-strength material.
Optionally, the material of the protective net is a low-carbon steel wire.
Optionally, the dam protection system that breaks gradually of dam body is leaked in the dammed lake, still includes: stock and bracing piece.
The anchor rod is used for inserting the protective net through the anchor rod hole to fix the protective net;
the supporting rod is used for supporting the protective net.
Optionally, the dam protection system that breaks gradually of dam body is leaked in the dammed lake, still includes: a pressure reducing ring;
the pressure reducing ring is disposed on the protective netting; the size of the pressure reducing ring is selected according to the size of the grid of the protective net.
Optionally, the pressure reducing ring comprises a spiral annular steel pipe and a fixing piece; the spiral annular steel pipe and the fixing piece are arranged between meshes of the protective net; .
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the barrier lake drainage dam body gradual dam break protection system provided by the invention, a drainage channel is excavated downstream along the center line of the barrier lake drainage dam body; the uniformly fixed protective net on the downstream back water surface of the barrier lake drainage dam body can slow down the dam break time of the dam body by uniformly arranging the protective net on the barrier dam body, thereby slowing down the dam break speed of the dam body, reducing the peak flow and huge water flow energy of the dam body caused by rapid dam break, ensuring the smooth drainage of the barrier lake, reducing the water level of the barrier lake to a safe height, meeting the requirements of barrier lake emergency measures, reducing the risk of instantaneous dam break of the barrier lake to a great extent compared with the traditional barrier lake emergency measures, and improving the safety of the emergency measures.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of a dam-breaking protection system for a dammed lake drainage dam body;
fig. 2 is a schematic view of the arrangement of anchor rods of the drainage channel provided by the invention.
Description of reference numerals: 1-drainage ditch, 2-dam body, 3-protective net, 4-anchor rod hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a protective system for gradually breaking a dam of a damming lake drainage dam body, which can slow down the dam breaking time of the dam body and ensure smooth drainage of the damming lake.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural view of a dam gradual break protection system of a dam body for damming lake drainage provided by the present invention, and as shown in fig. 1, the dam gradual break protection system of a dam body for damming lake drainage provided by the present invention includes: drainage ditch 1 and a plurality of protection network 3.
The drainage ditch 1 is excavated downstream along the central line of the damming lake drainage dam body 2. The central line of the dam body 2 of the dammed lake is determined according to the geographical position and the topographic structure of the dam body 2 of the dammed lake. The drainage ditch 1 keeps straight line as much as possible on the whole without large bending and corner.
And a plurality of protective nets 3 are uniformly fixed on the downstream back water surface of the barrier lake drainage dam body 2. The fixing position of the protection net 3 is in the downstream section area of the backwater surface; and (3) carrying out equidistant segmentation on the back water surface of the dam body 2 according to the elevation and the gradient of the back water surface at the downstream of the dam body to obtain the segmented area. The distance between each section of the protection net 3 is the same.
The equal distance is adopted to arrange in proper order on arranging protection network 3, has played the effect of intercepting layer upon layer, and when the rivers of dam body 2 began along the drainage ditch downstream discharge, along with the continuous increase of flow, the velocity of flow is gradual improvement, and the rivers of letting down can produce the erosion effect to dam body 2, and the width and the degree of depth of ulcerate also can increase to a certain extent, and the rivers also can drive partial silt or stone and move downstream, have also increased dam body 2's the danger of bursting simultaneously. Through adopting equidistant protection network 3 of laying, every section protection network 3 can both play fine interception effect, and 2 upper portions of the dam body are carried substances such as silt stone by rivers and can be intercepted by the protection network 3 of lower part in proper order, the effectual siltation that prevents the low reaches river course, also can effectually prevent the quick dam of bursting of the dam body, need not lay protection network 3 comprehensively to whole dam body 2 simultaneously, has improved work efficiency, also the cost is reduced to a certain extent.
The section of the drainage channel 1 is trapezoidal.
The depth of the drainage channel 1 is lower than that of the drainage groove.
In order to improve the overall tension resistance and achieve a good effect, the mesh shape of the protection net 3 should be a diamond-shaped mesh.
The number of the sections of different dam body 2 partitions is different, and the distance L between the protective nets 3 is different2Should be less than the length L of each segmented region1And the length of each partition is controlled to be one half of the length of each partition as much as possible, the protective nets 3 are sequentially arranged downwards from the top of the dam, and anchor rod holes 4 are formed in the periphery of each protective net 3 and used for inserting prestressed anchor rods. The inside available bracing piece or stock of protection network 3 supports and fixes, improves the intensity of protection network 3, strengthens the interception effect, adopts plum blossom type mode to arrange when arranging stock or bracing piece.
When the protective net 3 is arranged at the position, anchor rods are arranged at both sides and the bottom of the drainage channel 1 to fix the protective net 3 at the position, as shown in fig. 2.
The material of the protective net 3 is high-strength material.
The protective net 3 is made of low-carbon steel wires.
Dam body dam break protection system gradually of damming lake drainage still includes: stock and bracing piece.
In order to improve the mechanical property and stability of the protective net 3, after the protective net 3 is fixed by the prestressed anchor rods, the protective net 3 should be reinforced by the support rods or anchor rods in the protective net 3, so that the protective net 3 can be better laid on the surface of the dam body, the strength of the protective net 3 is further improved, the arrangement form of the support rods is also arranged in a quincunx manner, and the number of the support rods is determined according to the width of the dam body 2 and the arrangement position of the protective net 3.
The anchor rods are used for inserting the protective net 3 through anchor rod holes to fix the protective net 3;
the support rod is used for supporting the protective net 3.
In order to further improve the intercepting effect of the protective net 3 and also consider the economic cost factor, the dam breaking protection system of the barrier lake drainage dam body gradually further comprises: a pressure reducing ring.
The pressure reducing ring is arranged on the protective net 3, so that the impact force applied to the protective net 3 can be well relieved, and the protective net 3 can be well protected; the size of the pressure reducing ring is selected according to the size of the grid of the protective net 3.
The pressure reducing ring comprises a spiral annular steel pipe and a fixing piece; the spiral annular steel pipe and the fixing piece are arranged between meshes of the protective net 3; the strength of the protection net 3 is improved, and the impact force on the protection net 3 is reduced.
According to the invention, the arrangement of the protective nets 3 on the dam body 2 is carried out on the basis of excavating the drainage groove, and compared with the excavating amount of the traditional drainage groove, the excavating amount of the drainage groove is greatly reduced, and the grooving speed is higher. In addition, more artificial control can be achieved in the dam break time, on the basis of uniformly arranging the protective net 3, water flow in the damming lake can be stably drained, the flow speed and the peak flood flow of dam break water flow are reduced, the formed damming dam can be gradually broken under the continuous scouring of the water flow, and the threat to the life and property safety of people in the downstream can be avoided.
The method has the advantages of less engineering amount and simple construction when the drainage ditch 1 is excavated, and meanwhile, the calculation method is simple and convenient and is convenient to operate in the calculation process of the partition of the dam body. The laid protective net 3 is low in cost, high in strength, high in safety and reliability, and capable of well intercepting rock blocks, debris flows and other substances, and meanwhile, the whole dam face does not need to be completely laid when the protective net 3 is laid, so that the engineering quantity is reduced, and the working efficiency is improved.
When the fixed protection network 3 of installation, adopt the plum blossom mold type mode to arrange for the better fixing of protection network 3 has still add on protection network 3 and has established the pressure reduction ring on the dam body surface, has improved protection network 3's intensity greatly, has reduced the dam break fluid to protection network 3's destruction, has improved protection network 3's interception ability.
By adopting the method of laying the protective nets 3 in sections, the effect of intercepting layer by layer is achieved, tight connection is achieved among the protective nets 3, when the intercepting effect of the protective net 3 closest to the dam crest is poor due to continuous scouring of water flow, the next protective net 3 can effectively intercept the leaked sediment or stone, the sediment or stone is sequentially transmitted, the protective effect is obvious, the substances such as stone sediment and sand carried by the leaked water flow are effectively intercepted layer by layer, the dam breaking speed of the dam body is also slowed down, and the protective effect is obvious.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. The utility model provides a dam protection system is broken gradually to damming lake drainage dam body which characterized in that includes: a drainage channel and a plurality of protective nets;
the drainage ditch is excavated downstream along the central line of the drainage dam body of the barrier lake;
and the plurality of protective nets are uniformly fixed on the downstream back water surface of the barrier lake drainage dam body.
2. The dam body gradual dam break protection system of claim 1, wherein the cross-sectional shape of the drainage channel is trapezoidal.
3. The dam body gradual dam break protection system of claim 2, wherein the depth of the drainage channel is lower than the depth of the drainage groove.
4. The barrier lake discharge dam body gradual dam break protection system as claimed in claim 1, wherein the material of the protection net is high-strength material.
5. The barrier lake discharge dam body gradual dam break protection system as claimed in claim 4, wherein the material of the protection net is low carbon steel wire.
6. The system for protecting against gradual dam break of a dam body of a dammed lake discharge according to claim 1, wherein the system for protecting against gradual dam break of a dam body of a dammed lake discharge further comprises: stock and bracing piece.
The anchor rod is used for inserting the protective net through the anchor rod hole to fix the protective net;
the supporting rod is used for supporting the protective net.
7. The system for protecting against gradual dam break of a dam body of a dammed lake discharge according to claim 1, wherein the system for protecting against gradual dam break of a dam body of a dammed lake discharge further comprises: a pressure reducing ring;
the pressure reducing ring is disposed on the protective netting; the size of the pressure reducing ring is selected according to the size of the grid of the protective net.
8. The barrier lake discharge dam body gradual dam break protection system as claimed in claim 7, wherein said pressure reducing ring comprises a spiral ring-shaped steel pipe and a fixing member; the spiral annular steel pipe and the fixing piece are arranged between meshes of the protective net; .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010799397.0A CN111893952A (en) | 2020-08-11 | 2020-08-11 | Dam body of damming lake drainage dam breaks dam protection system gradually |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010799397.0A CN111893952A (en) | 2020-08-11 | 2020-08-11 | Dam body of damming lake drainage dam breaks dam protection system gradually |
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| CN111893952A true CN111893952A (en) | 2020-11-06 |
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| CN202010799397.0A Pending CN111893952A (en) | 2020-08-11 | 2020-08-11 | Dam body of damming lake drainage dam breaks dam protection system gradually |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991094A (en) * | 2022-07-17 | 2022-09-02 | 中国科学院、水利部成都山地灾害与环境研究所 | Regulation and control system for drainage groove engineering of damming dam |
| WO2024016399A1 (en) * | 2022-07-17 | 2024-01-25 | 中国科学院、水利部成都山地灾害与环境研究所 | Regulation and control system in barrier dam sluice channel engineering |
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| CN201165666Y (en) * | 2008-03-11 | 2008-12-17 | 陈莉 | Flexible netted check dam |
| 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 |
| CN106192871A (en) * | 2016-09-21 | 2016-12-07 | 中国电建集团成都勘测设计研究院有限公司 | Protection arrangement for debris flow gully |
| CN210917200U (en) * | 2019-08-05 | 2020-07-03 | 湖北省水利水电规划勘测设计院 | Permanent structure of renovating of dammed lake |
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2020
- 2020-08-11 CN CN202010799397.0A patent/CN111893952A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100640015B1 (en) * | 2006-06-30 | 2006-11-01 | (유)대산이앤씨 | Dike structure removing floating matters on the river |
| CN201165666Y (en) * | 2008-03-11 | 2008-12-17 | 陈莉 | Flexible netted check dam |
| 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 |
| CN106192871A (en) * | 2016-09-21 | 2016-12-07 | 中国电建集团成都勘测设计研究院有限公司 | Protection arrangement for debris flow gully |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991094A (en) * | 2022-07-17 | 2022-09-02 | 中国科学院、水利部成都山地灾害与环境研究所 | Regulation and control system for drainage groove engineering of damming dam |
| WO2024016399A1 (en) * | 2022-07-17 | 2024-01-25 | 中国科学院、水利部成都山地灾害与环境研究所 | Regulation and control system in barrier dam sluice channel engineering |
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