CN112878276A - Barrier lake drainage groove net chain slope protection structure and method - Google Patents
Barrier lake drainage groove net chain slope protection structure and method Download PDFInfo
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- CN112878276A CN112878276A CN202110281863.0A CN202110281863A CN112878276A CN 112878276 A CN112878276 A CN 112878276A CN 202110281863 A CN202110281863 A CN 202110281863A CN 112878276 A CN112878276 A CN 112878276A
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- 230000004888 barrier function Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 26
- 238000004873 anchoring Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 14
- 230000002787 reinforcement Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 230000003628 erosive effect Effects 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 7
- 230000001066 destructive effect Effects 0.000 abstract description 2
- 230000003111 delayed effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009172 bursting Effects 0.000 description 3
- 239000003657 drainage water Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011798 excavation material Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
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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
- E02B3/123—Flexible prefabricated covering elements, e.g. mats, strips mainly consisting of stone, concrete or similar stony material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses a barrier lake drainage groove net chain slope protection structure and a method, wherein an initial drainage groove side slope (8), an initial drainage groove bottom slope (9), a burst rear drainage groove side slope (10) and a barrier body dam top (11) are adopted; after the damming body bursts, the one end of wedge net chain (6) be connected with anchor structure (3) through chain (4), the other end passes through chain (4) and is connected with reinforcing bar gabion submerged counter weight (7), reinforcing bar gabion submerged counter weight (7) and wedge net chain (6) be located damming body burst back drainage groove (2) in, it has overcome among the prior art arbitrary damming lake free development, must form overtopping burst flood, the very big shortcoming of destructive power, have in traffic confined damming lake job site, can shorten the advantage of drainage groove protection engineering time by a wide margin.
Description
Technical Field
The invention relates to the technical field of barrier lake risk disposal in the field of emergency rescue of hydraulic engineering, in particular to a barrier lake drainage groove net chain slope protection structure and a barrier lake drainage groove net chain slope protection method.
Background
The dammed lake is a serious natural disaster, which refers to a natural lake formed by river valley collapse, landslide and even debris flow under certain topographic and geomorphic conditions due to dynamic geological action of a bank slope, and the corresponding deposit for blocking the river channel is called a damming body.
The southwest high mountain canyon area of China is affected by a plurality of factors such as earthquake, rainfall and the like, the dammed lake disasters are frequent, and the area is usually poor in natural environment, inconvenient in transportation, deficient in basic data such as hydrogeology and the like. The barrier lake has strong water storage capacity and short natural bursting time, is free to develop, tends to form overtopping bursting flood, has great destructive capacity, and tends to cause great danger to people at the downstream of the river channel if the barrier lake is not properly disposed.
Aiming at the burst risk of the high-risk dammed lake, the currently adopted engineering measure is to excavate a drainage groove at the bealock at the top of the damlock body to reduce the reservoir water level and the water storage capacity, and particularly for the dammed lake with dense population in a downstream area, the drainage groove can quickly and effectively reduce the disaster loss.
The core idea of the drainage groove of the dammed lake is that when the reservoir water level at the upstream of the dammed dam is low and the reservoir capacity is small, the drainage is performed in advance, and the risk is reduced.
However, the current engineering measures can only realize that the barrier lake overflows in advance, and when the downward discharge flow in the drainage groove is increased to a certain scale, the vertical downward cutting and the transverse expansion erosion develop rapidly, so that the burst flood is difficult to control, and the life and property safety of downstream people is seriously threatened.
In order to prevent the rapid collapse and instability of the weir plug body, protective measures such as a huge reinforcement gabion and a huge stone locking notch are mainly adopted at present, but in the practical application, the structures such as the huge reinforcement gabion and the huge stone locking notch are generally in emergency disposal sites of the weir plug lake with traffic blockage, the problems of complex installation process, inconvenience in transportation and transfer and the like exist, in addition, in the initial stage of the collapse process, the downward discharge amount in the drainage groove is small, the structures such as the gabion and the like contact with downward discharge water flow too early, the normal flushing and downward cutting are blocked, and the reduction of the upstream reservoir capacity is extremely unfavorable. In addition, along with the constantly development of the collapse process, the drainage grooves of the dammed lake gradually collapse and deform, the structural forms of the bottom channel and the side slope are constantly and dynamically changed, and the traditional protective measures are basically difficult to dynamically adjust the structural forms of the drainage grooves and adapt to the scouring and deformation of the drainage grooves, so that the side slopes of the drainage grooves are difficult to be continuously protected, the collapse of the drainage grooves is delayed, and the collapse control and peak clipping effects are greatly weakened.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provides a barrier lake drainage groove net chain slope protection structure.
The first purpose of the invention is implemented by the following technical scheme: the barrier lake drainage groove net chain slope protection structure comprises a barrier body initial drainage groove, a barrier body collapse rear drainage groove, an anchoring structure, a chain, a barrier body upstream slope surface, a wedge-shaped net chain, a reinforcement gabion sinking counterweight, an initial drainage groove side slope, an initial drainage groove bottom slope, a collapse rear drainage groove side slope and a barrier body dam crest;
after the damming body bursts, one end of the wedge-shaped net chain is connected with the anchoring structure through the chain, the other end of the wedge-shaped net chain is connected with the reinforcing steel bar gabion sinking counter weight through the chain, and the reinforcing steel bar gabion sinking counter weight and the wedge-shaped net chain are located in the drainage groove after the damming body bursts.
In the above technical scheme: when the weir plug body is not burst, the anchoring structure, the wedge-shaped net chain and the reinforcing steel bar gabion sinking counter weight are connected through the chain and located on the upstream slope surface of the weir plug body, one end of the wedge-shaped net chain is connected with the anchoring structure through the chain, and the other end of the wedge-shaped net chain is connected with the reinforcing steel bar gabion sinking counter weight through the chain.
In the above technical scheme: and a region of one fifth of the elevation from the upstream slope surface of the weir dam to the top of the weir dam is a protection region, and a wedge-shaped net chain is arranged in the protection region.
The second purpose of the invention is to overcome the defects of the background technology, and provide a method for protecting the structure by using the barrier lake drainage groove net chain.
The second purpose of the invention is implemented by the following technical scheme: the method for protecting the structure of the barrier lake drainage groove net chain slope protection comprises the following steps;
firstly, excavating and arranging an initial drainage groove of the weir plug at the top of the weir plug;
weaving a wedge-shaped net chain, wherein the longitudinal scale of the wedge-shaped net chain is 3/4 times of the height of a dam plug body, the transverse scale of the wedge-shaped net chain is 1/3 of the width of the dam plug body, and the mesh size of the wedge-shaped net chain is 30 multiplied by 30 cm;
thirdly, selecting a region below the dam height 1/5 from the upstream slope surface of the damming body to the top of the damming body as a protection region, and respectively arranging an anchoring structure and a reinforcing steel bar gabion sinking counterweight in the protection region;
fourthly, arranging the wedge-shaped net chain in the protection area in the third step, connecting one end of the wedge-shaped net chain with the reinforcing steel bar gabion sinking counter weight through a chain, keeping the wedge-shaped net chain capable of longitudinally stretching along with the downward flow, and connecting the other end of the wedge-shaped net chain with an anchoring structure through the chain to ensure that the wedge-shaped net chain is not washed away by the downward flow;
and fifthly, after the water level of the upstream reservoir gradually rises to the bottom slope of the initial drainage groove, the downward-discharging torrent gradually vertically downwards cuts and erodes the bottom slope of the initial drainage groove and transversely widens and erodes the side slope of the drainage groove of the damming body, the bottom slope of the initial drainage groove continuously retrogresses and develops upstream due to the retrogression erosion action and gradually extends to the upstream slope of the damming body to cause the damming body to burst to form the drainage groove after the damming body bursts, and finally, the sinking water balance weight of the reinforcement gabion slides into the drainage groove after the damming body bursts along with the lock chain due to the water flow traction and dragging action.
Compared with the traditional protective structure measures such as giant reinforcement gabions, giant rock locking notches and the like, the invention has the following advantages:
1. the submerged counterweight of the reinforcement gabion can utilize drainage groove excavation materials to obtain local materials, the wedge-shaped mesh chain is simple and convenient to construct and install, and particularly the drainage groove protection construction time can be greatly shortened on a construction site of a traffic-blocking barrier lake.
2. The wedge-shaped net chain has strong integrity and sufficient flexibility, can continuously adjust the structural form of the wedge-shaped net chain along with the collapse and deformation of the upstream slope of the weir plug body, can timely slide into the drainage groove, does not influence the normal flood discharge and overflow of the drainage groove, can continuously protect the bottom slope of the drainage groove, delays the collapse of the weir plug body, and plays a role in obviously controlling collapse and peak clipping.
Drawings
FIG. 1 is a longitudinal view of the present invention
Fig. 2 is a detailed view of the structure at a in fig. 1.
FIG. 3 is a schematic plan view of the present invention
In the figure: initial drainage groove 1 of the weir plug body, drainage groove 2 after the weir plug body bursts, anchor structure 3, chain 4, the domatic 5 in weir plug body upper reaches, wedge net chain 6, reinforcing bar gabion sinking counter weight 7, initial drainage groove side slope 8, initial drainage groove bottom slope 9, drainage groove side slope 10 after bursting, weir plug body crest 11, the vertical slope of i drainage groove, the horizontal width of W weir plug body, H weir plug body puerperium height, the vertical length of L weir plug crest.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but they are not to be construed as limiting the invention, and are merely illustrative, and the advantages of the invention will be more clearly understood and appreciated by those skilled in the art.
Referring to FIGS. 1-2: the barrier lake drainage groove net chain slope protection structure comprises a barrier body initial drainage groove 1, a barrier body burst rear drainage groove 2, an anchoring structure 3, a chain 4, a barrier body upstream slope surface 5, a wedge-shaped net chain 6, a reinforced gabion sinking counterweight 7, an initial drainage groove side slope 8, an initial drainage groove bottom slope 9, a burst rear drainage groove side slope 10 and a barrier body dam top 11;
after the damming body bursts, the one end of wedge net chain 6 be connected with anchor structure 3 through chain 4, the other end passes through chain 4 and is connected with reinforcing bar gabion counter weight 7 that sinks, reinforcing bar gabion counter weight 7 and wedge net chain 6 be located the damming body burst back drainage groove 2 in.
When the weir plug body is not burst, anchoring structure 3, wedge net chain 6 and reinforcing bar gabion sinking counter weight 7 loop through chain 4 to be connected and lie in weir plug body upper reaches domatic 5 on, wedge net chain 6 one end pass through chain 4 and be connected with anchoring structure 3, the other end passes through chain 4 and is connected with reinforcing bar gabion sinking counter weight 7. The anchoring structure 3, the wedge-shaped net chain 6 and the reinforcing steel bar gabion sinking counter weight 7 are connected in sequence through the chain 4 and are positioned on the upstream slope surface 5 of the weir plug body, and the structure is simple and convenient to install and wide in coverage area.
And a region of one fifth of the elevation from the upstream slope surface 5 of the weir dam to the dam crest 11 of the weir dam is a protection region, and a wedge-shaped net chain 6 is arranged in the protection region. The structural form that the wedge-shaped net chain 6 is arranged in the protection area is wide in coverage, but only the later-stage drainage of the drainage groove is restrained, and the early-stage drainage of the drainage groove is not interfered, so that the collapse speed of the dam plug body is delayed, and the evolution process of the flood is flattened.
The basic principle of the invention is as follows: along with the water level in the dammed lake reservoir area gradually rises to the bottom slope of the drainage groove, the downward drainage water flow in the drainage groove slowly cuts and erodes the downstream section to form a steep ridge, and the steep ridge is gradually developed upstream and erodes the bottom slope of the drainage groove in a tracing manner, and the wedge-shaped net chain 6 laid on the upstream slope surface gradually enters the drainage groove under the dragging and pulling action of downward drainage and rapid flow until the water level reaches the breach.
Because the wedge-shaped net chain 6 adopts a flexible structure, the shape of the wedge-shaped net chain can be rapidly adjusted along with the collapse and deformation of the undercut bottom slope of the drainage groove water flow, the good integrity and flexibility of the wedge-shaped net chain are fully exerted, the initial drainage groove bottom slope 9 is always protected, the drainage groove bottom slope 9 under the wedge-shaped net chain is prevented from being rapidly hollowed by the downward-discharging torrent, and the rock blocks larger than the mesh size are rapidly washed away along with the downward-discharging torrent, so that the collapse of a dam plug body, the rising speed of a delayed collapse flood peak and the collapse flow are delayed, the collapse flood change process is flattened, and the functions of controlling collapse and peak clipping are achieved.
The invention also includes a method of use: the method for protecting the structure of the barrier lake drainage groove net chain slope protection comprises the following steps;
firstly, excavating and arranging a weir plug initial drainage groove 1 at the weir plug dam crest 11;
secondly, weaving a wedge-shaped net chain 6, wherein the longitudinal scale of the wedge-shaped net chain 6 is 3/4 times of the height of a dam plug body, the transverse scale of the wedge-shaped net chain 6 is 1/3 of the width of the dam plug body, and the mesh size of the wedge-shaped net chain 6 is 30 multiplied by 30 cm;
thirdly, selecting a region below the dam height of the upstream slope 5 of the weir plug from 11 elevations 1/5 of the weir plug dam crest as a protection region, and respectively arranging an anchoring structure 3 and a reinforcing steel bar gabion sinking counterweight 7 in the protection region;
fourthly, arranging the wedge-shaped net chain 6 in the protection area in the third step, connecting one end of the wedge-shaped net chain 6 with the reinforcing steel bar gabion sinking counterweight 7 through the chain 4, keeping the wedge-shaped net chain 6 longitudinally stretched along with the downward drainage water flow, and connecting the other end of the wedge-shaped net chain 6 with the anchoring structure 3 through the chain 4 to ensure that the wedge-shaped net chain 6 is not washed away by the downward drainage water flow;
fifthly, after the water level of the upstream reservoir gradually rises to the bottom slope 9 of the initial drainage groove, the downward-discharging torrent gradually vertically downward cuts and erodes the bottom slope 9 of the initial drainage groove and transversely widens and erodes the drainage groove side slope 8 of the weir plug body, the bottom slope 9 of the initial drainage groove continuously retrogresses upstream due to the traceback erosion action and gradually extends until the upstream slope 5 of the weir plug body, so that the weir plug body breaks down to form a drainage groove 2 after the weir plug body breaks down, and finally the sinking counter weight 7 of the reinforcement gabion slides into the drainage groove 2 after the weir plug body breaks down along with the chain 4 due to the water flow traction and dragging action; the drainage groove 2 is prevented from being rapidly eroded after the damming body is burst, and the collapse speed of the dam slope at the upstream of the damming body is gradually reduced.
The above-mentioned parts not described in detail are prior art.
Claims (4)
1. Barrier lake drainage groove net chain bank protection structure, its characterized in that: the dam comprises a weir plug body initial drainage groove (1), a weir plug body burst rear drainage groove (2), an anchoring structure (3), a chain (4), a weir plug body upstream slope surface (5), a wedge-shaped net chain (6), a reinforcement gabion sinking counterweight (7), an initial drainage groove side slope (8), an initial drainage groove bottom slope (9), a burst rear drainage groove side slope (10) and a weir plug body dam crest (11);
after the damming body bursts, one end of the wedge-shaped net chain (6) is connected with the anchoring structure (3) through the chain (4), the other end of the wedge-shaped net chain is connected with the reinforcing steel bar gabion sinking counter weight (7) through the chain (4), and the reinforcing steel bar gabion sinking counter weight (7) and the wedge-shaped net chain (6) are located in the drainage groove (2) after the damming body bursts.
2. The barrier lake drainage groove net chain slope protection protective structure of claim 1, wherein: when the weir plug body is not burst, the anchoring structure (3), the wedge-shaped net chain (6) and the reinforcing steel bar gabion sinking counter weight (7) are connected through the chain (4) in sequence and are located on the upper slope surface (5) of the weir plug body, one end of the wedge-shaped net chain (6) is connected with the anchoring structure (3) through the chain (4), and the other end of the wedge-shaped net chain is connected with the reinforcing steel bar gabion sinking counter weight (7) through the chain (4).
3. The barrier lake drainage groove net chain slope protection protective structure of claim 2, wherein: and a region from the upstream slope surface (5) of the weir plug to one fifth of the elevation of the dam crest (11) of the weir plug is a protective region, and a wedge-shaped net chain (6) is arranged in the protective region.
4. The method for protecting a structure by using a network chain for a drainage groove of a weir lake according to any one of claims 1 to 3, wherein: it comprises the following steps;
firstly, excavating and arranging a weir plug initial drainage groove (1) at the weir plug dam top (11);
secondly, weaving a wedge-shaped net chain (6), wherein the longitudinal scale of the wedge-shaped net chain (6) is 3/4 times of the height of a damming body, the transverse scale of the wedge-shaped net chain is 1/3 of the width of the damming body, and the mesh size of the wedge-shaped net chain (6) is 30 multiplied by 30 cm;
thirdly, selecting a region below the dam height of the upstream slope surface (5) of the damming body from the dam crest (11) of the damming body and the elevation 1/5 as a protection region, and respectively arranging an anchoring structure (3) and a reinforcement gabion sinking counterweight (7) in the protection region;
fourthly, arranging the wedge-shaped net chain (6) in the protection area in the third step, connecting one end of the wedge-shaped net chain (6) with the reinforcing steel bar gabion sinking counterweight (7) through a chain (4), keeping the wedge-shaped net chain (6) capable of longitudinally stretching along with the downward drainage flow, and connecting the other end of the wedge-shaped net chain (6) with an anchoring structure (3) through the chain (4) to ensure that the wedge-shaped net chain (6) is not washed away by the downward drainage flow;
and fifthly, after the water level of the upstream reservoir gradually rises to the bottom slope (9) of the initial drainage groove, the downward-discharging torrent gradually vertically downwards cuts and erodes the bottom slope (9) of the initial drainage groove and transversely widens and erodes the drainage groove side slope (8) of the weir plug body, the bottom slope (9) of the initial drainage groove continuously and retrospectively develops upstream due to the tracing erosion action and gradually extends to the upstream slope surface (5) of the weir plug body to cause the weir plug body to burst to form the drainage groove (2) after the weir plug body bursts, and finally the sinking counter weight (7) of the reinforced rock cage is connected with the locking chain (4) to slide into the drainage groove (2) after the weir plug body bursts due to the water flow traction and dragging action.
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| CN202110281863.0A CN112878276B (en) | 2021-03-16 | 2021-03-16 | Barrier lake drainage groove net chain slope protection structure and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| WO2022252283A1 (en) * | 2021-06-04 | 2022-12-08 | 中国科学院、水利部成都山地灾害与环境研究所 | Steel cable net gabion structure body weir dam breach danger elimination and flood control system and application thereof |
| 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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| CN112878276B (en) | 2024-03-15 |
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