CN218027465U - Flow control net of flow discharge groove and flow control system of flow discharge groove of damming dam - Google Patents
Flow control net of flow discharge groove and flow control system of flow discharge groove of damming dam Download PDFInfo
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- CN218027465U CN218027465U CN202221876783.6U CN202221876783U CN218027465U CN 218027465 U CN218027465 U CN 218027465U CN 202221876783 U CN202221876783 U CN 202221876783U CN 218027465 U CN218027465 U CN 218027465U
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Abstract
The utility model discloses a chute accuse flow net, damming dam chute accuse flow system. Only implement the defect of accuse stream to the local of chute bed surface to prior art, the utility model provides a chute accuse stream net, the main part is the rectangle cable wire net, the wire side and the counterweight fixed connection of rectangle cable wire net, and the counterweight is the multirow multiseriate and arranges. The utility model also provides a damming dam discharge groove accuse flow system covers damming dam discharge groove and dam crest/dam facing around by discharge groove accuse flow net, and discharge groove accuse flow net meets the end and covers the upper reaches dam facing, and the end of swimming back covers the dam facing in the low reaches, following current limit and the embedded stake fixed connection of burying in dam crest/dam facing. The technical proposal of the utility model is the flow control measure for protecting the whole flow-through bed surface. The flow control net of the drainage groove forms a flexible protective net cover structure at the drainage groove and around the drainage groove, and can effectively realize hydrodynamic environment, limit erosion rate of a burst opening, regulate water flow and reduce peak flow in the process of manually regulating and controlling drainage and burst.
Description
Technical Field
The utility model relates to a disaster prevention and reduction structure especially relates to a structure and system of regulation and control damming dam discharge chute flood peak flow volume, belongs to geological disaster prevention and control, disaster prevention and reduction engineering structures technical field.
Background
The damming dam is a natural dam body formed by backwater at the upstream section due to the phenomena of landslide, debris flow, collapse of tillite and the like of mountains at two sides of a river channel under the inducing action of earthquakes, heavy rainfall and the like, and a large amount of earth and stones gush into and block the river channel. After the barrage dam is formed, on one hand, water is dammed up in front of the dam, so that the water level of the barrage dam is continuously lifted, upstream backwater is submerged, and flood is formed; on the other hand, the damming dam is loose or uneven in structure and poor in stability due to the fact that the stacking forming speed is high, and the pressure of the damming water in front of the dam is increased continuously, so that the damming dam is in danger of bursting from the beginning of forming, and once bursting occurs, downstream flood is caused. Therefore, once the damming dam is formed, the emergency dangerous situation of the upstream bank and the downstream bank of the river channel is caused.
The most common measure for relieving the emergency danger of the damming dam is to implement scientific and guided manual treatment on the damming dam, and most importantly, manually excavate a drainage groove to discharge danger. Through the drainage under manual regulation and control, the upstream water level is reduced, the submerged area is reduced, the drainage flow at the initial stage of the drainage process is reduced, and the flood pressure at the later stage of the downstream is relieved. Then, due to the fact that the material composition of the weir dam has heterogeneity caused by natural accumulation and extrusion, the development of the breach in the collapse process of the weir dam is difficult to predict, flow regulation and control cannot be carried out according to the urban flood control standard of the downstream area, and the risk of collapse flood of the weir dam is increased undoubtedly. Therefore, necessary auxiliary means are added while the drainage groove is excavated manually, the control on the dam body around the drainage groove is realized as much as possible, and the drainage disposal of the damming dam is ensured to meet the downstream flood defense standard.
ZL 2021106276551 discloses a dam bursting danger-discharging flood control system of a steel cable expanded rock cage structure, which is characterized in that the steel cable expanded rock cage structure is used for adjusting the downstream peak flow before/during the dam bursting, the structure is a strip structure of a sectional cylindrical steel cable net, and the structure is placed on the top surfaces of dams at two sides of a discharge chute along the direction of a river channel/channel before/during the bursting, so that the 'delay intervention' concept of manually intervening and adjusting the peak flow is realized. The technical scheme has the defect that the flow control effect is limited compared with the protection of the whole overflowing bed surface mainly aiming at the protection of the local area of the flow discharge groove bed surface. ZL2019111551119 discloses a structure for controlling the peak discharge of damming dam bursting of a damming dam, wherein steel pipe piles are respectively arranged at the middle lower parts of the damming dams at the two sides of a drainage channel, the positions and the burial depths of the steel pipe piles are designed according to the condition of meeting the peak discharge at the moment of 20 years, and meanwhile, a protective cement paste reinforced gabion and an outlet impact-resistant cement paste reinforced gabion are further arranged to delay the erosion extension speed of the two banks of the drainage channel, delay the damming dam bursting time and reduce the maximum peak discharge of the bursting. This solution is still a protection for the local area of the drainage duct bed surface, with similar drawbacks to the above mentioned prior art. Meanwhile, the dam is regarded as a solid artificial structure by the scheme, the steel pipe pile groups are densely implanted into two sides of the drainage channel, a large amount of local artificial disturbance is actually applied to the uneven dam body of the dam, the local dam body is easily damaged, and the unpredictable burst risk is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a technical scheme is flowed in accuse of damming dam discharge groove to the not enough of prior art, can provide the guard action to damming dam upstream face, breach and the large granule material of back of the body face department fast at the disaster scene, effectively regulate and control damming dam burst flood risk.
In order to achieve the above object, the utility model discloses at first provide a chute accuse flow net, technical scheme as follows:
a chute accuse flow net which characterized in that: the main part is rectangle steel cable net, rectangle steel cable net's wire side and counterweight fixed connection, the counterweight is the multirow multiseriate and arranges.
The drainage groove flow control net takes a rectangular steel cable net as a main body structure, and the balance weight pieces are arrayed on the net surface. The drainage groove flow control net covers the drainage groove of the dammed dam, and the coarsening degree of the breach boundary is increased, so that large-area quick start of dam body substances in the damming process of the dammed dam is prevented, and the development rate of the breach of the dammed dam is slowed down.
Under the optimal design, one end of the rectangular steel cable net is a current-facing end, a large-size counterweight is fixed at the current-facing end, standard counterweights are fixed at the rest positions of the rectangular steel cable net, and the mass of the large-size counterweight is larger than that of the standard counterweight. The purpose of the optimization design is as follows: when the rectangular steel cable net covers the drainage groove, two ends of the rectangular steel cable net can simultaneously cover the upstream dam face and the downstream dam face, and the stress characteristics of the two ends are different. By adjusting the mass of the counterweight and the coarsening degree between the rectangular steel cable net and the upstream and downstream dam faces, the friction force distribution of the whole net face is more matched with the characteristics of the water flow dynamics of the backwater before the dam and the backwater after the dam, and the method is an improved design which is very convenient, fast and economical.
Further, the balance weights of the drainage groove flow control net are arranged in a staggered mode, so that the uniformity degree of friction force distribution between the balance weights and the dam face is improved. And according to the local material-taking principle, the counterweight part is a bundle port gabion string bag.
Use above-mentioned chute accuse flow net as the basis, the utility model discloses provide a damming dam chute accuse flow system simultaneously, technical scheme is as follows:
the utility model provides an utilize the damming dam drainage groove flow control system that above-mentioned drainage groove flow control net realized which characterized in that: the drainage groove flow control net covers the drainage groove of the damming dam and the surrounding dam crest/dam face, the upstream end covers the upstream dam face, the downstream end covers the downstream dam face, and the downstream edge of the rectangular steel cable net is fixedly connected with the embedded pile embedded in the dam crest/dam face.
The flow control system of the drainage groove of the damming dam consists of a flow control net of the drainage groove and the damming dam. The drainage groove flow control net covers the drainage groove of the damming dam and the top/face of the peripheral dam, the upstream dam face and the downstream dam face are respectively covered by the upstream end and the downstream end, and the left and right downstream edges of the drainage groove flow control net are fixed on the embedded piles in the top/dam face. Therefore, the drainage groove and the surrounding dam crest/dam face form a net cover pocket protection and interception structure which can swing along with water flexibly through the tension of the drainage groove flow control net, large-area quick start of dam body substances in the damming process of the damming dam is prevented, and the development rate of the damming dam break mouth of the damming dam is reduced.
Under the optimized design, the length of the upstream dam face covered by the upstream end of the flow-discharging groove flow-control net is greater than the length of the downstream dam face covered by the downstream end. The flow control effect is improved by increasing the dragging area/length of the flow control net of the drainage groove on the downstream dam surface.
Furthermore, in order to increase the flexibility of the system, the downstream edge is fixedly connected with the embedded pile through a connecting piece. The connecting piece can buffer the tension of the flow control net of the drainage groove on the dam crest/dam surface in the swinging along with water to a certain extent.
Compared with the prior art, the invention has the beneficial effects that: (1) For the technical scheme that prior art only designed the blowdown regulation and control to damming dam blowdown groove bed surface local area, the utility model discloses blowdown groove accuse flow net and damming dam blowdown groove accuse flow system are one kind and flow the measure to the accuse that the bed surface protected overflows entirely. The drainage groove flow control net covers the drainage groove and the peripheral dam face/dam slope, the left downstream side and the right downstream side are fixed on the two dam faces/dam slopes, a coarsening layer is similarly additionally arranged on the surface of the dam, and a flexible protective net cover structure is formed together, so that the hydrodynamic environment of overflowing of the damming dam can be effectively adapted; (2) The limited deformation of arranging the counterweight on the wire side and cooperating the connecting piece guarantees that the flow control net is hugged closely the notch boundary all the time under the environmental change condition, and the breach rivers of earning out of the discharge are difficult to with its lift, avoids two notches middle parts of the steel cable net on notch both sides to sink simultaneously, guarantees the stability on coarsening layer from this. Overall, the utility model discloses the product can both effectively restrict burst mouthful erosion rate, regulation and control rivers flow, avoid entering the flood peak state suddenly at artifical regulation and control earial drainage in-process and burst the in-process. (3) The product has simple structure, easily obtains local materials, has economical processing, transportation and installation cost and is suitable for popularization.
Drawings
Fig. 1 is a schematic perspective view of a flow control system of a drainage groove of a damming dam (the arrow indicates the direction of a river channel).
FIG. 2 isbase:Sub>A schematic view of the structure of FIG. 1A-A (the direction of the river is shown by the arrow).
Fig. 3 is a schematic top view of the flow control system of the drainage groove of the damming dam (the direction of the river channel is shown by the arrow).
Fig. 4 is a cross-sectional view of the chute in the transverse direction.
The numerical designations in the drawings are respectively:
1 facing end 12 of rectangular steel cable net 11, downstream end 13, downstream edge 2, counterweight 21, large counterweight 22, standard counterweight 3, discharge chute 4, dam crest/dam face 41, upstream dam face 42, downstream dam face 43, pile burying
Detailed Description
The preferred embodiments of the present invention will be further described with reference to the accompanying drawings.
Example one
As shown in fig. 1 to 3, a flow control system for a drainage groove of a damming dam is additionally built for a certain damming dam.
The maximum storage capacity of 60 multiplied by 10 can be formed by 50m of the dam height of a certain damming dam, 40m of the width of the dam top, 30 degrees of the upstream dam slope, 25 degrees of the downstream dam slope and 130m of the dam length (vertical to the river direction) 6 m 3 。
Fig. 1 isbase:Sub>A schematic perspective view (an arrow indicatesbase:Sub>A direction ofbase:Sub>A river channel) ofbase:Sub>A flow control system ofbase:Sub>A drainage groove ofbase:Sub>A damming dam, fig. 2 isbase:Sub>A schematic sectional view of fig. 1A-base:Sub>A, fig. 3 isbase:Sub>A schematic top view of the flow control system of the drainage groove of the damming dam, and fig. 4 isbase:Sub>A schematic sectional view of the drainage groove inbase:Sub>A cross-sectional direction.
Firstly, designing a drainage groove flow control net. The main body of the drainage groove flow control net is a rectangular steel cable net 1, the net surface of the rectangular steel cable net 1 is fixedly connected with the counterweight 2, and the counterweight 2 is arranged in multiple rows and multiple columns. One end of the rectangular steel cable net 1 is an incident flow end 11, a large-size counterweight 21 is fixed at the incident flow end 11, a standard counterweight 22 is fixed at the rest positions of the rectangular steel cable net 1, and the size of the large-size counterweight 21 is larger than that of the standard counterweight 22. The counterweight 2 is a beam port gabion string bag.
In the embodiment, the bunching gabion net bag is formed by bunching a gabion net bag with the aperture of 80mm multiplied by 100mm after being filled with stones, and the gabion net bag filled with the stones has the equivalent diameter of 0.5-2.0 m and is arranged in a longitudinal and transverse regular mode. The weights 2 may also be arranged in a staggered arrangement. The adjacent counter weights are arranged at equal intervals, and the distance is 5m to 8m
The drainage groove flow control net covers the drainage groove 3 of the damming dam and the surrounding dam top/dam face 4, the upstream dam face 41 is covered by the upstream end 11, the downstream end 42 is covered by the downstream dam face 12, and the downstream edge 13 of the rectangular steel cable net 1 is fixedly connected with a buried pile (43) buried in the dam top/dam face 4 through a connecting piece. The upstream dam 41 is covered by the upstream end 11 for a greater length than the downstream dam 42 is covered by the downstream end 12.
In this embodiment, the connecting member is a steel cable, and the embedded pile 43 is a steel pipe pile. The pile distance is 10-20 m, and the buried depth is not less than 20m.
Claims (10)
1. Chute accuse flow net, its characterized in that: the main part is rectangle cable wire net (1), the wire side and the counterweight (2) fixed connection of rectangle cable wire net (1), counterweight (2) are the multirow multiseriate and arrange.
2. The chute flow control net of claim 1, wherein: the weight parts (2) are arranged in a staggered manner.
3. The run-off spout flow-controlling net of claim 1, wherein: the adjacent weight pieces (2) are arranged at equal intervals with the distance of 5-8 m.
4. The run-off spout flow-controlling net of claim 1, wherein: the counterweight (2) is a bundle port gabion string bag.
5. The run-off spout flow-controlling net according to any one of claims 1 to 4, wherein: rectangular steel cable net (1) one end is meet stream end (11), meet stream end (11) fixed large size weight (21), rectangular steel cable net (1) other fixed standard weight (22) in position, large size weight (21) quality is greater than standard weight (22).
6. A damming dam drainage spout flow control system implemented by using the drainage spout flow control net of claim 5, characterized in that: the drainage groove flow control net covers a damming dam drainage groove (3) and a surrounding dam crest/dam face (4), the upstream dam face (41) is covered by the upstream end (11), the downstream end (42) is covered by the downstream end (12), and the downstream edge (13) of the rectangular steel cable net (1) is fixedly connected with a buried pile (43) embedded in the dam crest/dam face (4).
7. The weir dam discharge trough flow control system of claim 6, wherein: the length of the upstream dam face (41) covered by the upstream end (11) is greater than the length of the downstream dam face (42) covered by the downstream end (12).
8. The weir dam discharge trough flow control system of claim 7, wherein: the downstream edge (13) is fixedly connected with the embedded pile (43) through a connecting piece.
9. The weir dam discharge chute flow control system of claim 8, wherein: the connecting member is a steel cable.
10. The weir dam discharge trough flow control system of claim 8, wherein: the embedded pile (43) is a steel pipe pile.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221876783.6U CN218027465U (en) | 2022-07-17 | 2022-07-17 | Flow control net of flow discharge groove and flow control system of flow discharge groove of damming dam |
| PCT/CN2022/111155 WO2024016399A1 (en) | 2022-07-17 | 2022-08-09 | Regulation and control system in barrier dam sluice channel engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221876783.6U CN218027465U (en) | 2022-07-17 | 2022-07-17 | Flow control net of flow discharge groove and flow control system of flow discharge groove of damming dam |
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| Publication Number | Publication Date |
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| CN218027465U true CN218027465U (en) | 2022-12-13 |
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| CN202221876783.6U Active CN218027465U (en) | 2022-07-17 | 2022-07-17 | Flow control net of flow discharge groove and flow control system of flow discharge groove of damming dam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115637673A (en) * | 2022-12-23 | 2023-01-24 | 中国科学院、水利部成都山地灾害与环境研究所 | Ice-collapse type ice lake burst surge generation and height measurement device |
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2022
- 2022-07-17 CN CN202221876783.6U patent/CN218027465U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115637673A (en) * | 2022-12-23 | 2023-01-24 | 中国科学院、水利部成都山地灾害与环境研究所 | Ice-collapse type ice lake burst surge generation and height measurement device |
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